6.0 Turbo Cam
11-10-2011, 05:45 AM
#21
Twin 62's will run deep into the 5's if everything is setup right. Why don't you have a reputable LS engine builder spec you a turbo cam? There is a difference in cams specced for twins or a single. It's all about your pressure ratios (boost vs back pressure), twins typically have lower back pressure and run more of a n/a style cam.
11-10-2011, 10:45 AM
#23
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Would Twins 62mm give me enough HP to run low 6's 1/8 mile with a factory looking camaro.
backpressure will change the cam design but its going to be a function of your turbine size, housing a/r and manifold design. You can have a single setup that has low backpressure. Having twins doesnt automatically mean you have lower backpressure. You can handicap any setup.
11-10-2011, 01:21 PM
#27
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Yea but your running an ungodly amount of psi to make those work though and you obviously have the pumps to support that psi, where he might not. That's why I said he needs bigger injectors.
I got 80's at 43psi and made about 700whp on a mustang dyno thru a big stall Th400. 84% duty cycle I believe it was if I calculated that right. Running rich too.
My buddy made 816whp on same mustang dyno, T56/14 bolt truck rear with that LS2 with E85 on 118lb injectors that were at 68psi base pressure. E85 requires alot more fuel than gas.
80's should be enough with twin pumps or large enough single on 93 oct for his goals at 58psi base or even 43 psi
11-10-2011, 01:24 PM
#28
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If the heads are decently ported and you use a nice cam, I dont see why you cant hit your goals with 12-13 psi. My car runs low mid 6's with just 13-14psi and likely doesnt make as much power as a 6.0 with better heads and similar cam.
11-10-2011, 04:11 PM
#31
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What air fuel you shooting for on pump gas?
That setup would be fine at 11.5 to 1 on 12-13 psi and moderate timing and still run low 6's.
E85 you dont tune air fuel you tune lambda.
Whats alot of pressure? 60psi? 70psi? 80psi? Thats in the range of a good set of dual pumps. My buddy's new setup on 20psi has 68psi base with those 118lb injectors now running pump 93 gas...thats almost 90 psi of fuel pressure on twin pumps with boost and puts out way more than enough power to go bottom 6's. Its in the 800+whp range now too, and 80% cycle duty for some reason. I dont see a problem here? 80lbs should be more than enough with pump 93 and low 6s 1/8mile ET. I am running low 6's with 80's. You dont need 800 whp to run low 6's if the launch is strong. I only dyno'd ~650whp
That setup would be fine at 11.5 to 1 on 12-13 psi and moderate timing and still run low 6's.
E85 you dont tune air fuel you tune lambda.
Whats alot of pressure? 60psi? 70psi? 80psi? Thats in the range of a good set of dual pumps. My buddy's new setup on 20psi has 68psi base with those 118lb injectors now running pump 93 gas...thats almost 90 psi of fuel pressure on twin pumps with boost and puts out way more than enough power to go bottom 6's. Its in the 800+whp range now too, and 80% cycle duty for some reason. I dont see a problem here? 80lbs should be more than enough with pump 93 and low 6s 1/8mile ET. I am running low 6's with 80's. You dont need 800 whp to run low 6's if the launch is strong. I only dyno'd ~650whp
11-10-2011, 08:56 PM
#32
https://ls1tech.com/forums/fueling-i...ick-cheap.html
11-15-2011, 08:32 AM
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Most T4's have a 3" downpipe so use that if you can. For 650+whp, 3" make sense. I run 3" off mine into a single 4" then switched to 3" duals. Saw 1.5-2psi less boost on the wastegate spring, so I believe it relieved alot of backpressure but I dont have measurements. Dual 3" however will out flow a single 4".