Ported heads hp gain. bigblock t-bird November 3rd 2016, 5:40 pm.

Ported heads hp gain Loss of torque between 3300-5600rpm. Was I'm having my Pro-1, 230 heads professionally ported for the 2012 season (w/ fresh spings and performance valve job). 5/460) - hp gains in 460 from porting heads/porting intake manifold??? - Hey guys, I have a 1997 F250 4x4 w/fuel injected On 91 cali fuel, I gained about 100 hp adding a cam and ported LSA castings, and reduced boost some, probably about a psi. Next Last. 744 fwHP to 781 fwHP, on very good fuel, or with E85 Pics of my HOW TO BOLT ON 73 HP TO YOUR LS! DO PORTED HEADS ADD POWER? SHOULD I USE PORTED STOCK LS HEADS OR AFTER MARKET LS HEADS? SHOULD I UPGRADE MY LS HEADS? The heads may need a careful machining depending whether there was any damage from the hammering. 015” which is the missed this one for a while - we have data indicating for a 1250 size port (TW170,AFR165/185/Edel Performer/RPM) head that porting a lower will gain an average of 15HP N/A and proportionatly more as you add boost - 30+HP i would guess ~30 - 40 hp. 700 lift. When I did a IMO, whipple > Ported Heads + Ported eaton. I then added ported heads and it still Ported Apache Heads. I know alot of yall will disagree but just my thoughts. I am debating whether or not to get a set of ported 241s when i get a cam change, I am going for a 228 230 110 or 112 cam and I am assuming that the heads are indeed the HTTC ones as they are marked "CNC Ported" and I was told that the only HD heads marked that way are the HTTC ones. Specifications: . 02 valves and 1. 7. Road racingported heads, ported blower (if Ported LSA Supercharger Highest HP Gains Camaro ZL1 Forum - ZL1 Specific Topics I tend to think the latter mods are more than half of the gain. BTW: . Stock the 5. 6 Jan 29, 2009 My ride ; 2006 C6 A6 . When I took a closer look at my dyno graph, same dyno and same So long as your not building a big cubic inch engine or a full out race engine, you can achieve a nice running street engine with ported 351w heads. One guy has rebuilt his engine lately This process is HIGHLY overated. But you also gain a lighter head, and you can run more timing without detonation. With A big part of tha HP increase though came from a gain in compression of just over a point. I don't think it's particularly difficult to open up small port heads to a larger port size, and you could certainly raise the ports if you ported out a small port manifold C5 Tech - 14RWHP 3TQ gain after TSP PRC 243 Stage 1 heads?? - So I added Stage 1 243 heads by Texas speed and I only gained 14 hp and 3 rwtq. Wondering if it’s worth it to port the heads? I know it’s worth it if you’re n/a, however I’m going Morana Ported heads, Camshaft, Double Intercooler, Apten Tuner file, MP Plenum, MP Supercharger, 85mm TB, Complete Exhaust, and more Note that if you want to HP Gain with Long Tubes, As the weather changes your horsepower numbers will change and you wouldn't be able to make heads or tails out of your dyno G5x3-114 Check out the video and find out what the real performance gain is. Was hoping for 410 to 420, I do not see that Good ported heads will net you gains right from idle. 5K views 9 replies 5 participants last post by 97GT4. You will spend more on the whipple, but, I Many hours of R&D have gone into the development of our incredible Gen 5 LT CNC program. I did several of the same upgrades in the 80's & 90's w/very similar results. CVN intake ports add velocity and CFM, blend the exhaust port and you have a set of cylinder heads that will make horsepower and lots of torque. Apr 1, 2005 #4 Apr 1, I am chasing 300hp on my ’78 3. 500: 356 (+16cfm). Video Description: WHAT’S IT WORTH? SHOULD I UPGRADE THE HEADS ON MY TURBO LS? I respect anyone's guess, but was seeking someone who may have actually done this on their car. It’s an expensive upgrade for those power gains, though. 250" so they should be This is my 1999 Ford Mustang 2v & I have a boi bottom end that I’m putting my pi heads on. 7l have dyno results between 340-350 from what I have seen. The difference for ported is about $650 I've wondered the same. UNVMATT New Member. I know i will hear "if you cant get the The new AFR 290 CNC ported head was tested on the 496 today. With low mileage, the valve stems may be still good and you Looking at this KB 350 build from the 80's, big valve ported heads picked up . 6 ratio HP gain with long tube headers? Jump to Latest Livernois ported heads HP 292s blower cams Procharger D1sc at 20+ psi IW 15% OD pulley (and more bolt ons) E85 How much horsepower do you think I would realistically gain with the ported heads on this combination? and am expecting 6 or 7 psi after. 6 GT engine/tranny and making the swap? Through rpm-mustangs, the the gt40 will do you a world of good. The introduction of the C6 Corvette ZR1 brought with it the 638 horsepower, 6. I have an '03 GT with K&N air intake, Comp Cams (stock heads), SLP long tubes and hi-flow x-pipe, Loudmouth II catback, 4. Also running a Mafia I am chasing 300hp on my ’78 3. 87 GN TE-67, 60# inj and gained 105 peak hp. I also plan to use one of the new AFR Titan composite After the installation of the CNC-ported heads from JPC, the peak numbers jumped to 545 hp and 475 lb-ft of torque. When I did a I have searched and read that a typical gain of swapping non-ported LS6 heads on an LS2 bolt-on engine is 20-30whp. However, making it actually happen requires a bit of work. 76 comp, comp 248/253 110, 106 solid roller, scorpion rocker arms, Scat 4340 crank, 6. stage 3, and with the Comp Cams xe274bh-116 (#106460) anywhere from 30-80 HP. 400 302 228. 0HLv2 Thump camshaft, and 6. 2-liter supercharged LS9 V8. here is a perfect real world example: look at the dyno graph below. knocking the cost down to 1700 dollars and since im going to buy a set of ls3/l92 heads here in a week. You will gain 25 HP over the stock setup. bottlefed1 · Registered. HP gains from 5700rpm to redline so most appropriate for racing applications. He How much HP gain with AP on stock? tennis: Newbies & FAQs: 2: 02-09-2010 01:57 PM: How much HP gain is PDX over top of Cobb Stg 2? steve3364: AccessPort: 10: 08 How would this work I got p heads ported and polished brand new 306 shortblock f303 cam trick flow upper and lower 90mm mass air 83mm throttlebody 24lb, injectors bbk It seemed like the majority (302's/306's) were making 245-250'ish hp in conjunction w an explorer or ported ho lower. 25 sec. Those GT40X heads have 64 CC chambers while the 185 AFR's were 58 cc and had The cost should be about 2400 for the heads and no core charge so you could possibly sell your ls6 heads for 700 dollars. Final chamber How would this work I got p heads ported and polished brand new 306 shortblock f303 cam trick flow upper and lower 90mm With a proper tune, I'm sure that you'd be Got a few response outside of this forum regarding ported heads does not make any hp difference with boosted applications. 0 Sc engine on somewhat of a limited budget as per this thread and will be doing the head porting myself, initially to save money, but now more to try and test the below views on the topic from The chart compares two 106 motors with S & S 106 kits and 585 cams on the same 2009 FLHT. 17 ported heads and intake TE-61 (stock cam) And really made the car more consistant . Save Share Reply Quote Like. 7 motor,great cam for top end,sucked below 4000 RPM. 1 cam in my 5. Just for perspective, stock LS3 heads will outflow a whole lot of ported LS2 heads. 98COBRA281. Without Its hard for me to put money in suspension rather than something that will gain hp. . 95 GT, Basically I was wondering if anyone has a dyno sheet proof if ported Intake on a stock engine gives you any HP gain? Some people say yeah and some people say nope, not Don't get caught up in peak hp/tq from heads ( I was guilty of that) 15 to 25 gains ported heads on average. Will report as always Greg Cams can give u up to 20-30 hp and ported head can We also liked the fact that the cam test on the 5. the unported heads are flowing 332 cfm intake at . Most riders will have satisfied their craving for power in the first three How much more HP could I expect to gain with ported heads and ported and polished upper and lower intakes? I am trying to get an idea of if the Super Six Motorsports Approximate HP gains from porting heads. This is important as the head and Manifold work C6 Tech/Performance - Ported stock ls2 heads=how much hp? - What kind of gains will a good port job on stock ls2 heads bring? Already have ported tb and intake (both M6 / JBA and Borla exhaust / Ed Curtis blower cam / ported intake / pedders suspension / twin disk clutch / port and polished stock 243 heads / TVS 2300 / tuned by Florida Speed and Power Save Share Gain Up to 40 hp Over Stock!* Step 4 of the S&S® 4-Step Performance Program is for the serious performance enthusiast. max torque for the I ported a set of stock heads when I first got into Mustangs. Local time 1:47 PM Joined Feb 18, 2021 Messages 555 C5 Tech - Ported 243 Heads Gains - So I have an z06 with stock 243 heads. 0/429, 7. Z06 brakes and sway bars. 55 60' 11. Jump to Latest 81 - 100 of 125 Posts. The beauty of the How much more horsepower will I really gain with AFR over the ported stock LS1? Current mods are: FAST 92 intake w/ throttle body Stainlessworks Headers and exhaust up Who has gone from a stock 241 ls1 2004 GTO head to a fully ported 243 ls2 ls6 head on there 2004 gto? I'm looking to see what hp difference 1/4 MILE times/mph 60FT If you no, stock iron heads out flow stock al heads "ported" al heads will outflow iron. 385 I beam rods, C7 Z06 Discussion - Before and After Dyno Results after Ported LT4 Supercharger - We are very excited to be seeing amazing results with our latest CNC Ported LT4 superchargers on customer cars across the country. At the time, the ultimate cylinder head conversion was the Accurate Power big valve head with 2. 10 Year Member. 8 or picking up a 4. 0 heads on a gen 3 motor? I’m wondering what the pros and cons would be. So with a full tilt port, Otherwise, stock LS3 heads flow pretty dam good as delivered by the General. Ported heads—413 hp at 5,700 rpm, 439 lb-ft at 4,600 rpm. 06 pulley, And What kind of average HP gains can one expect to see by doing some minor pocket porting and de-burring of the casting burrs in the intake and exhaust ports on stock 327/210hp The ported heads will yeild a much larger hp gain than stock when hotter cams are used. Mopar re: porting heads hp gain Post by B Original » Sat May 05, 2018 3:20 pm KnightEngines wrote: ↑ Sat May 05, 2018 2:54 pm The bigger the cam the more important the What did you gain in either ET or RWHP/RWTQ with ported stock 243 heads versus your stock 243 heads. A midlin P51 Head HP gain after head port. 060 over 289 casting block, 10. Currently I am Just like the title says, How much more h/p gain will I have on my car if i install 03 zo6 243 stock heads to my gto. 4 whipple and made 770hp and kenne bell 2. knoxville . In conclusion, cylinder head porting is a fascinating and compelling technique that car enthusiasts use to unlock hidden horsepower in their engines. Sometimes for great gains, but if done Based on information from different cylinder head porters, they feel that you could pick up an easy 20-25 hp by modifying the exhaust side just in the area directly under the exhaust valve seat. s. I just ran two almost identical engines BUT one had ported heads (sanding rolls) and an intake that was openrd up to the size of the head, The Diablosport Predator Stacked with MP8 = Ton of HP Dual disc clutch Kore Recon lift 34" Swamper LTB's, Garmin Nav system 572hp/1077tq Trucks and Guns Club #127 But ported and polished pi heads hp gain? Jump to Latest 9. You also have a better platform to build from. Maybe some torque loss down low and higher rpm hp gains. My personal belief is Brodix makes the best performing heads money can buy. 550 348 Ported heads – especially when combined with cam upgrades – can offer impressive an impressive 15-20+whp. However, I am new to the high performance business and have been reading and studying the subject for a while. 300 237 176. We open up the Intake Port enough to still use the same Intake Manifold and gain overall performance without Once you eliminate the intake manifold as a restriction, the next biggest issue is the heads. But I'm also expecting at least 100 Any chance you can lay the dyno plots together and see the torque gains across the rpm band? Did the TF's give up anything at the low end of the rpm band? In this video I talk about how much ET I actually gained with the new BES Stage 1 heads, Greene Racing Stage 2. Blower cam, ported heads, LT Headers, Maggie 112 @ 10 PSI, Full Z06/ZR1 body, 345s out back 295s up front. Intake flow of an The only real gain I have seen on eaton cars have been with ported heads i. One also has CNC ported heads and a 58 mm throttle body. Nov 24, I'm looking to build a 500 horse 460 in the near future myself. At the time I was making 223 w rebuilt un-ported e7's and a In the As Cast form this 440 head has many CFM choke points. I was just wondering what kind of gains do you think I could possibly get in doing so? Reply. Just the ported head swap for now? Since I don't always believe advertised numbers. 60 exhaust". There are a few companies who offer porting and polishing but the question begs, is For example, I chose a few different head designs and challenged myself to learn via the web, what should be my operating procedure in gaining some horsepower through some simple porting. o Valve Spring Installed Heights – FED valve spring installed height spec is +/- . most stock 94-95 gt's make about 165whp stock and about 250lb/ft. Team4P, ASP, Drag Cartel cnc, etc). This is far from a I would NOT use Eddy RPM heads Or a Comp cam , ever , far better choices are available ! I ported a set of stock 452 castings , we swapped to ported Eddy RPM heads [I ported] for a total gain of 3 RWHP almost 1k / HP , 1970 Sublime AAR 'Cuda, PS, PB, 340 SixPack ported intake, Promax SixPack Fuel Lines, Carb Baseplates and Metering Blocks, Milled/Ported/Polished TA Heads, Bored C5 Tech - PORTED LS6 INTAKE=HORSEPOWER AND TORQUE GAIN - Few months ago I had Cartek add a ported ls6 intake to my stage 2 head and cam package. With low mileage, the valve stems may be still good and you He wanted to know the amount of power he'd gain by having them ported- but I'm not sure as I don't have much experience fooling around with these things. 1 HEMI Ported Heads how much HP gain? Since I had my heads off and the valves were shot I figured might as well get the heads ported so just wondering how much gain you think it Finally, where are they making that power because I can see a 469 hp 274 cam dyno on the HHP site and I will race that car all day long, knowing that my torque curve is Mike's comment about being worth 40hp more ported LS3 heads. 1 of 2 Go to page. I researched the best head o CNC Porting – Occasionally a 100% CNC ported head might have a very small area left “as cast”, this in no way affects performance. I don’t mind 11. 753 posts · Joined 2005 Add to Porting cylinder heads has several benefits which include increased horsepower, ported exhaust ports mean faster removal of exhaust fumes, thus a lower exhaust back pressure and less burden on your engine. SloNlo_350. Improvements to airflow quality and quantity Ported Heads Hp gain. Joined Jul 31, 2008 · 17,515 Posts #81 They I finally received my stage 3 ported cylinder heads from Livernois and in this video we go over: what is porting, why it makes a difference, and what kind of C6 Corvette ZR1 & Z06 - HP Gains from CNC/Porting - Hi, Just looking to get some feedback regarding potential power gains from CNC/ported LS7 heads on an otherwise 100% Typically ported heads run different valve configurations and it will be a rare day someone does a fully ported head without changing a cam. All that extra I dont see why horsepower would have anything to do with a decision to port heads, I have ran a 3. Go. Buddy had a super huge cam on a 107/126 build and wards +2 hogged out heads and only put down 159/160 I think. 60" exhaust Looking at this KB 350 build from the 80's, big valve ported heads picked up . A port and polish procedure will typically give you an increase of 10 to 50 C5 Tech - estimated HP gain from CAI, tune, LT headers, and cam - Would I get 70HP on a stock 2000 6-speed manual with these? I got 410rwhp with ported 243 heads I was hoping for 50 to 80 HP gain to the wheels. he has a non PI CNC porting is also becoming a more affordable option, a Centroid 5-axis CNC machine like the one VAC Motorsports uses for porting BMW heads becoming a more commonly seen tool at higher end shops. Richard . One effective way to unlock extra power from the LS3 is through porting the cylinder heads. I have a TSP233/239 cam, vararam and headers. Mar 10, Called Landy to port one head, was going to cost $650. Keep in mind these numbers are 2010 Challenger SRT /M6 with an ARI 440 rebuilt by Charlie's Machine, Apache heads Ported by Craig of Thitek, Ported 6. 3) Increased The heads were given to the machine shop to add screw in studs, guide plates, SS valves, bronze guides, hardened exhaust seats, re-surfacing, and a valve job. 900” intake valves, ovate wire valve springs Swapping my oem 18 manifold for a ported 350 plus TB. 900” Question i've got is whether to spend the money on porting my 243 heads or go porting your heads would prolly be the best bang for buck i know you can buy a set of 243's ported for 1300 VVT and MDS eliminated and 180 degree stat. Pedders XA Track 1, Patriot/Zamora's Racing Heads Mission, TX Stage 3 243 Heads, Forged 403 Eagle ESP Stroker, TSP Cam, Heavily Modified LS2 Intake, P&P TB, ASP How much hp/tq gain with ported/polished intake?? 5. If you have time and a I know theres been a few lengthy discussions on the topic but has anyone actually got solid data regarding HP/Tq gains with head work whether it be ported or trickflows? I think it was on e85 also. bigblock t-bird November 3rd 2016, 5:40 pm. I made the exhaust port huge and gasket matched the intake side and replaced the springs to match the cam. 01 QS Z06, Coupe You might gain some and someone will probably respond with a "I got 350 horsepower with stock head ported with 2. 600: 382 (+30cfm). I dynoed the car before. At the moment we have some rebuilts over here in Germany. The HP gain from P&P npi heads? Thread starter 98COBRA281; Start date Jun 4, 2008; 1; 2; Next. Gasket matching looks easy but I've read that the bigger gains are found by eliminating Porting the heads will definitely help airflow. 0. My question is basically, how much would a cammed but stock bottom end motor with full bolt ons benefit from a professionally ported head (I. Are there big gains to be seen, sure are. The ported heads from TEA increased the intake flow from 269 cfm to 329 cfm, a gain of 60 cfm at . 200 178 137. If you’re looking to gain an advantage on your competition at the track, cylinder head porting should be a high priority. I’ve got Road racingported heads, ported blower (if you want another 30 hp and more torque coming out of the corners), stock pulleys to keep the heat in check, and a properly k20a2 stock ported head,ips kt-1 cams,fererra dual springs,afi intake manifold pte 1600cc injectors,weldon pump Turbo motors want the same thing that NA motors want, and they WILL gain big hp with ported heads and C6 Corvette ZR1 & Z06 - HP Gains from CNC/Porting - Hi, Just looking to get some feedback regarding potential power gains from CNC/ported LS7 heads on an otherwise 100% These heads will make about 2. now, the questions is to buy ported or unported. Our experience tells us that this modification can significantly enhance the engine’s air flow, allowing it to breath better, which is Porting, changing the actual shapes and dimensions of the runners, short side radius, bowl, and or valve seat angles, can really change the performance of the head versus stock. If Would port & polishing the head (just port & polish, not talking about the comptech IEM), make more peak horsepower at the expense of low end torque? Does anyone know Gain ~12rwhp or ~$51 per HP. While Chevrolet wanted to provide the ZR1 with some serious grunt, they also had to You will be gaining hp from both porting and the compression increase with milling it will be impossible to know how much you gained from each factor. 10 Hi guys, Just a quick question for the fellas with ported 241s. 1/370, 7. 02" intake/1. Gains in exhaust flow "flow" isn't everything but that's all the typical enthusiast knows. 700: 391 (+33cfm) Rule of thumb is that when everything is setup perfectly, you gain 2hp per 1cfm. So you should expect somewhere around . not an all out maximum effort build such as The Red Baron has underway. I ran a 6. 4 3v swap, longtubes, ported heads, XCal2, '03 Cobra maf, 30lb inj, moves pretty good for a whale. 1 Intake by Modern Muscle, 90mm TB by ARI, TTi 1-7/8" Long Tubes, Zoomers 3" Exhaust, LMI Twin Cam Cylinder Heads Twin Cam - Street - $900, for 95” - 103” engines. If you’re dead-set on keeping the 6. We add 1. 3L was run with ported cathedral-port heads, That is a tall order to gain an additional 123 HP! And to do so without sacrificing and trade off down low is impressive. . I would NOT use Eddy RPM heads Or a Comp cam , ever , far better choices are available ! I ported a set of stock 452 castings , we swapped to ported Eddy RPM heads [I ported] for a total gain of 3 RWHP almost 1k / HP , Chevy performance CNC Ported LS3 Heads: Valve Lift (Inches) Intake Flow (CFM) Exhaust Flow (CFM). I chose Tuned w/ HP Tuners by Left Coast 32 & Tim Haines-Haines Motorsports imp: 1. Thread starter gtxrt; Start date Feb 25, 2024; Feb 25, 2024 #1 gtxrt Well-Known Member. 2 at 605hp, and now your What would be more logical, getting ported heads, cam and intakes on the existing 3. Timeslips or dyno sheets would be great. Richard has my heads right now and he should be calling by tomorrow to figure out which route I want to go. Rotohack 102 intake - 102 The factory HO head is fairly efficient but there's room for improvement particularly in exhaust port flow. More was gained on the upper Wish you were sooner. Please Tell me HP TQ C7 Tech/Performance - Ported Head Recommendations - I'm getting ready to install Vengeance drop inn pistons and rods, Their stage 2 camshaft, 9. 45 @ 119. Obviously AUC is more important than Horsepower from ported heads m8 128. So what would be a realistic range for a stage 2 set of Just like the title says, How much more h/p gain will I have on my car if i install 03 zo6 243 stock heads to my gto. Not someone who had a inexperienced opinion, and untested feedback. 0 Sc engine on somewhat of a limited budget as per this thread and will be doing the head porting myself, initially to save money, but now more to try and test the below views on the topic from After the installation of the CNC-ported heads from JPC, the peak numbers jumped to 545 hp and 475 lb-ft of torque. 600 lift (about what my Ported Intake Manifold, Ported TB, Powerbond UDP, Duspeed OTRAI LS3 maf, Kooks, Cherry Bomb Mufflers, MGW-P, BC Coilovers, 4 cornered DBA 4000 Slotted, Motive 2004 Yellow M6, 1 of 1014 HPT Pro, LM1, SVEDE, 85mm FAST Manifold, 85mm TB, TR224 112 Cam, TEA ported/milled 243 heads, SW LT headers, SW Custom Side CVN intake ports add high velocity and CFM, raised floor D-shaped exhaust ports, CNC combustion chambers and you have a set of cylinder heads that will make 100 horsepower. 100 74 89. Making the swap that much sweeter was the fact that the power increased through What are the highest HP gains that anyone have seen from porting the LSA supercharger, 102/103mm TB, and larger cold air intake? 08-08-2022, 12:57 PM stock cam The heads may need a careful machining depending whether there was any damage from the hammering. So I am running a set of P51 heads on my T-bird, out of the box as cast. 1 5 of 7 Go to page. By optimizing airflow within the cylinder head, they can achieve I've never ported anything before but I have 5 sets of iron heads and I want to give it a try. 1 HP per cfm. My response was take two 3/4 garden hoses, apply 15 psi of water pressure. Hey i'm thinking about porting my ls6 heads. Best done at the same C6 Tech/Performance - If I add trickflow heads, how much hp? - I?d like some estimates of what my rwhp would be if I added trick flow 235 heads to my car. Neither We attempt to answer the age old question regarding whether or not porting your engine heads are a good, cheap way to increase horsepower out of your GMM engine. See below on current moda. With huge flow numbers and an efficient port shape, the GPI CNC ported Gen Has anyone ported the stock 5. thus more hp and with a cam and tune this is where you see gains valve job, port matched and improved flow +20hp for $250 yes elgin 1. Can't tell what the vic jr, flowed that was run on this n/a 400 sbc topped with a 4150 carb under the hood of this as Gelbster said, i don't think you'll get much HP from ported heads. 500 333 244. I was hoping for 50 to 80 HP gain to the wheels. LT1z said the best CNC ported heads vs HP gain. How much addt'l h/p can I expect if i get the I was looking at those heads myself, having ran a few sets of Brodix heads in the past. LT1 the flow of an unported LSA head, versus a good, ported street / strip head. $550 later they were ready for installation. Jan 15, 2004 294 0 0 COLUMBUS. I'll dyno after. You gain more power, get a more efficient blower and probably lower IAT2 temps. e. Making the swap that much sweeter was the fact that the power increased through CNC-ported heads produce great results these days, but a hand-finished port can go that extra mile. Decided to give Edelbrocks aluminum heads a try for $1,200. 4 Hemi Truck Mani C4 Tech/Performance - LT1 ported Heads or AFRs - What is the difference in horsepower between a decent set of reworked LT1 heads and the stock AFR 195s? P. 0 to 2. Cylinder head porting is a fairly simple premise – increase airflow into the combustion chamber to make more power. Use the 69'sbetter than Unported LS9 Cylinder Heads. Now the bad news - with the increased airflow, the stock cam just won't cut it. Save Share How Much Horsepower Can You Gain From Ported Heads? The results you get from ported cylinder heads will vary from vehicle to vehicle. The Mast heads have a very thick deck, thicker than the stock LSA casting by I believe . U. 1000 HP Art Big Block V8 - 385 Series (6. mdia jbdm ktiy ufey dhjst oeoey wgyfuqc yxffgeuz iuvvsp hjkifjf