broke1 Posted February 6, 2011 Report Share Posted February 6, 2011 (edited) Stock FAST LS3 intake(for Corvettes and Camaro's) on a LME built 9.5:1 408,TEA CNC L92 heads,23x/24x,.62x lift cam TQ HP 3500 447.1 298.0 3600 449.1 307.8 3700 447.7 315.4 3800 448.2 324.3 3900 454.0 337.2 4000 461.9 351.8 4100 467.1 364.7 4200 465.9 372.6 4300 470.7 385.4 4400 468.5 392.5 4500 471.8 404.2 4600 476.5 417.4 4700 475.9 425.8 4800 482.7 441.1 4900 480.4 448.2 5000 482.4 459.3 5100 487.8 473.6 5200 500.3 495.4 5300 494.1 498.6 5400 491.9 505.7 5500 496.6 520.1 5600 492.2 524.8 5700 487.0 528.5 5800 484.7 535.3 5900 479.5 538.7 6000 474.2 541.8 6100 467.5 543.0 6200 456.3 538.6 6300 448.3 537.8 6400 446.1 543.6 6500 442.7 547.8 Same as above except ls2portworks.com ported L92 truck intake,no tuning done,just swapped the FAST LS3 for the Ls2portworks.com truck intake. TQ HP 3400 448.8 290.5 3500 447.5 298.2 3600 447.3 306.6 3700 450.6 317.5 3800 452.4 327.4 3900 459.5 341.2 4000 456.4 347.6 4100 456.4 356.3 4200 462.2 369.6 4300 461.4 377.8 4400 468.1 392.1 4500 473.6 405.8 4600 475.2 416.2 4700 477.5 427.3 4800 478.6 437.4 4900 478.8 446.7 5000 481.6 458.5 5100 486.7 472.6 5200 487.3 482.4 5300 489.6 494.0 5400 489.6 503.4 5500 493.9 517.2 5600 487.2 519.5 5700 484.7 526.0 5800 481.0 531.2 5900 477.2 536.1 6000 469.2 536.0 6100 466.2 541.4 6200 458.2 540.9 6300 458.6 550.1 6400 457.6 557.6 6500 450.8 558.0 Both intakes used the same 65# injectors and 92mm FAST throttle body.Pulls were only made to 6500 because this is a brand new engine after all. I expected the ported truck intake would come close to the FAST LS3 intake but no one expected it would actually beat the FAST in power production.And while making less tq too.Throw out the myth that a truck intake will make less hp but more TQ. Cost of the ported truck intake is around $400 vs $1000 for the FAST.Those of you with cathedral port heads can use the 07 up TBSS style intake and expect similar gains I would think.Plus you can save around $600 to put towards more mods!!lol My complete engine combo consists of: Stage 3 TEA 68cc L92 heads with hollow intake valves,inconel exhaust,upgraded platinum dual springs LS2 Portworks ported L92 truck intake with ported 90mm tb and 65# injectors ARP assembly bolt kit ARP crank,cam,and cam retainer bolts ARP main studs and side bolts ARP head studs All GM gaskets,seals and grommets except Cometic HG's Melling HV oil pump blueprinted by LME stock L92 rockers with Harland Sharp upgraded trunions custom ground Comp cam by FT Perfromance,www.ftperformance.com LS7 roller lifters OEM truck oil pan,front/rear covers,valley cover,windage tray,valve covers,all powder coated ATI Super Dampner for trucks w/ 10% underdrive AC CSR billet flexplate All new GM sensors High flow water pump SLP 160 stat 408 cu. in. short block with all new parts consisting of: Balanced, blue printed and assembled by LME GM 6.0L Iron block Callies 4340 4.00" crankshaft w/indexed & trued journals Callies 6.125" H beam rods w/ARP 2000 7/16" bolts Wiseco 4.030" forged pistons w/anti friction coating & tool steel wrist pins NPR stainless chrome rings,.047 .047 3mm rings for reduced friction & high heat applications, Clevite MS2199H main brgs Clevite CB663 H rod brgs DuraBond cam brgs, all oil galley plugs & dowel pins Assembled long block by LME including: degree'd cam, checking piston to valve clearance, adjust valve train geometry & lifter pre load, install oil pump & heads Roll master double roller timing set w/ torington bearing & nitrided gears. Manley 1 piece chromoly push rods 7.4xx" x 5/16 x .080" wall Backing it all up for the time being is a Extreme Automatics 4l65e with billet input and output and a 10.5" PI multi disk 3200 stall.I have a 4l80, cross member,and transfer case input shaft ready to go,just want to see how far we can take the 4l65e before swapping transmissions. Tuning is done via SCT X3 loaded with custom tunes via Henson Performance,www.hensonperformance.com. The SCT can be loaded with up to 3 custom tunes(not generic) Owning Buick Grand Nationals for the last 15 years,I have learned that race gas tunes can be worth over 100rwhp vs a regualr 93 tune.Thats way to much HP to leave on the table for me..... The reason for the low 9.5:1 compression ratio is I will be turbocharging this engine in the coming months with a KB Racing 88mm turbo kit.My goal with the truck is to have a streetable 1000+hp at the wheels.Not in a Silverado SS but its heavier big brother,the Escalade EXT.They are basically the same drivetrains and diffs with the only difference being the Escalade runs a BW 4481 transfer case that has 40 front/60 rear power distribution vs the NV 149 having 36 front/64 rear.I might swap to a NV 149 if I can find one at a good enough deal just for the conveinence of being able to pull the front shaft to dyno since you cant do that with the BW 4481.Sorry for the LOOOOOOONG post,alot of the info I just copied and pasted from my yahoo notepad. LME= Late Model Engines www.latemodelengines.com Edited February 6, 2011 by broke1 (see edit history) Quote Link to comment Share on other sites More sharing options...
broke1 Posted February 6, 2011 Author Report Share Posted February 6, 2011 I had the dyno #'s spread out a bit farther to make it easier to read but for some reason they bunched together.I even tried editing and it bunched them back together again!!!Sorry if its hard to read the #'s.Ill still work on trying to get them scanned and you can see the fuel consumption rates as well... Quote Link to comment Share on other sites More sharing options...
hottelboy Posted February 6, 2011 Report Share Posted February 6, 2011 excellent timing man and good to know Quote Link to comment Share on other sites More sharing options...
broke1 Posted February 6, 2011 Author Report Share Posted February 6, 2011 (edited) Thanks.I just dont want guys to waste money when there is a better option.Esp for the sneaky factor because all the "real" LS racers on the internet know truck intakes suck Goes to show how you should never take what you read on the net as the 100% truth.Ill bet you hundreds,if not thousands of LS guys have said how bad the truck intakes are for power production and they must be swapped out for any performance engine....and im sure some will even call BS and say I made all these #'s up,probably because they wasted $$ on a FAST intake trying to make more power. IMO,the best reason to replace the stock truck intake isnt for power production,its for looks because we all know the truck intakes are butt ugly!!!!So I do think the FAST intakes are worth $600 more than a ported truck stocker but just because they look better. Edited February 6, 2011 by broke1 (see edit history) Quote Link to comment Share on other sites More sharing options...
mcmahan Posted February 6, 2011 Report Share Posted February 6, 2011 Excellent thread. Great numbers too. Thank for sharing Quote Link to comment Share on other sites More sharing options...
misterp Posted February 8, 2011 Report Share Posted February 8, 2011 Thanks for posting those very interesting numbers. ...Esp for the sneaky factor because all the "real" LS racers on the internet know truck intakes suck ... Yup be careful of the guy at Hooters that says "uh yeah, it's just got a truck intake" because you'll be paying for his tab! Mr. P. Quote Link to comment Share on other sites More sharing options...
hottelboy Posted February 9, 2011 Report Share Posted February 9, 2011 Yup be careful of the guy at Hooters that says "uh yeah, it's just got a truck intake" because you'll be paying for his tab! Mr. P. Quote Link to comment Share on other sites More sharing options...
04CHASE Posted February 9, 2011 Report Share Posted February 9, 2011 i wonder how the fast lsx r/t would do against the two. Quote Link to comment Share on other sites More sharing options...
misterp Posted February 9, 2011 Report Share Posted February 9, 2011 It would also be very interesting to see two 1/4-mile timeslips, one from the truck with the FAST intake, and another of the same truck with the ported LS2 intake. Mr. P. Quote Link to comment Share on other sites More sharing options...
misterp Posted February 9, 2011 Report Share Posted February 9, 2011 (edited) For those without MS-Excel, I attached a graph of these numbers. I know which manifold *I* would go racing with! Mr. P. Edited February 9, 2011 by Mr. P. (see edit history) Quote Link to comment Share on other sites More sharing options...
misterp Posted February 9, 2011 Report Share Posted February 9, 2011 I went the extra mile and calculated the area under the curve for both intakes; the FAST intake delivered 0.2% more power-under-the-curve than the ported truck intake; I would expect this truck to run the exact same 1/4-mile time with either intake, the ported truck intake is a great bang-for-the-buck item. Mr. P. Quote Link to comment Share on other sites More sharing options...
Krambo Posted February 10, 2011 Report Share Posted February 10, 2011 I went the extra mile and calculated the area under the curve for both intakes; the FAST intake delivered 0.2% more power-under-the-curve than the ported truck intake; I would expect this truck to run the exact same 1/4-mile time with either intake, the ported truck intake is a great bang-for-the-buck item. Mr. P. I agree on the 1/4 mi times. It is foolish to only look at a peak number, rather the overall gain. Quite honestly, just swapping intakes is only part of the equation. Each one will have different breathing characteristics which will require fueling / timing tweaks to maximize power for each intake. I addition, cam profiles need to be matched for what each intake was designed for. There is a reason companies like GM have different intakes for different applications. Regardless, interesting numbers. Quote Link to comment Share on other sites More sharing options...
broke1 Posted February 10, 2011 Author Report Share Posted February 10, 2011 I would bet my left nut that with tuning,the ported truck manifold would SLAUGHTER the FAST intake in every bit of the power band and make even MORE than 11 more HP at peak(we cant even really compare peak #'s since both were still gaining hp at the 6500rpm dyno cut off though so you both make a moot point) Remember,no tuning was done what so ever from the FAST to the truck manifold.And according to the tuners that everyone uses(except me,I use SCT because I like having multiple tunes at my finger tips)when swapping intakes,a retune needs to be done. And even if it was fully tuned and they were that close,itd still be a waste of money when they are so close in performance with one carrying a $600 more price tag. Look at the article from the the Dec 10 Hotrod I posted,even more proof for the non beleivers.Me???Im glad I didnt listen to the experts and just buy a FAST and think it was the greatest.... Quote Link to comment Share on other sites More sharing options...
broke1 Posted February 10, 2011 Author Report Share Posted February 10, 2011 For those without MS-Excel, I attached a graph of these numbers. I know which manifold *I* would go racing with! Mr. P. Its not a LS2 intake,its a TRUCK intake used on the 2007 up 6.0's and 6.2's. And again,remember,no tuning was done with the truck manifold,it was bolted on the engine with the same tune as the FAST.Like I said,read the other thread I posted from Hot Rod. Quote Link to comment Share on other sites More sharing options...
Cramer Posted February 10, 2011 Report Share Posted February 10, 2011 Looks like GM is taking the aftermarket parts world out with their stock parts now. GMPP must have some killer stuff coming out soon! Quote Link to comment Share on other sites More sharing options...
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