How much HP differance between LS6 Intake &TB and a Fast 90/90 or 92/92 Setup?
03-27-2009, 11:18 AM
#21
tough to answer.
you'd probably be fine with just going the LS6 and ported stock TB route. they are dyno proven 7-10rwhp on a bolt on car. and the ls6 can be had for ~$300.
if you have the coin...the FAST might not be a bad upgrade. but stock cubes and stock cam might not show the gains that are proven with cam only and h/c engines.
there are only a few dyno tests to show real world gains by swapping on a stock cam engine.
i think someone did it on a vette and gained 20hp...but i'm not sure that was same day/same dyno.
for an educated guess, i would say on a bolt on, stock cammed car...you'd see 7-10rwhp with an LS6, and probably only about 5-7hp more with the FAST over the LS6.
my ported FAST on a cam only engine really didn't start to shine untill >5500rpm. and my cam peaks at 6300.
while i DID pick up power across the entire rpm band (both hp and torque) it was small, 5-10hp or torque. but in the peak rpm i gained almost 20hp.
i'm guessing this shows the rpm range of the LS6, but since you're stock cam you're not really reving much past 6100 or 6200rpm.
you'd probably be fine with just going the LS6 and ported stock TB route. they are dyno proven 7-10rwhp on a bolt on car. and the ls6 can be had for ~$300.
if you have the coin...the FAST might not be a bad upgrade. but stock cubes and stock cam might not show the gains that are proven with cam only and h/c engines.
there are only a few dyno tests to show real world gains by swapping on a stock cam engine.
i think someone did it on a vette and gained 20hp...but i'm not sure that was same day/same dyno.
for an educated guess, i would say on a bolt on, stock cammed car...you'd see 7-10rwhp with an LS6, and probably only about 5-7hp more with the FAST over the LS6.
my ported FAST on a cam only engine really didn't start to shine untill >5500rpm. and my cam peaks at 6300.
while i DID pick up power across the entire rpm band (both hp and torque) it was small, 5-10hp or torque. but in the peak rpm i gained almost 20hp.
i'm guessing this shows the rpm range of the LS6, but since you're stock cam you're not really reving much past 6100 or 6200rpm.
03-27-2009, 05:10 PM
#22
teke184- thanks for the informative response. just to get off topic here for one minute. You mentioned porting the stock TB. How much exactly? Enough to be of the same diameter as the LS6 intake opening?
03-28-2009, 06:11 AM
#23
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I had a buddy of mine that had a 2000 Z28 A4 that had full bolt ons and the Fast 92/92 set up...picked up almost 50 rwhp just with the fast set up and a retune. Whats weird is he only beat me by like a car, car and a half and I had full bolts ons(minus UDP) and LS6 intake and P&P TB. He was mad...lol
03-28-2009, 08:53 AM
#25
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porting the stocke TB removes some small restrictions ahead of the blade, and smooths out flow into the throttle body.
the actual size of the opening is not changed.
besides, the ls6 intake IS the same size as the stock tb
03-28-2009, 04:51 PM
#27
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check out my thread from back when i ported it.The dyno graph is on the second page at the bottom.And remember that this was with a mild cam.
https://ls1tech.com/forums/generatio...-intake-2.html
https://ls1tech.com/forums/generatio...-intake-2.html
03-28-2009, 10:42 PM
#29
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i never went to the track before the fast 90 ,so i cant give a comparison for you.but with power in sig the best i could do was a 12.1 at 118 on regular bf goodrich street tires.
03-29-2009, 02:49 PM
#34
Yeah, thats what i'm thinking too. 20 whp should be good for 2 tenths.
But its funny that all these guys that say they gained 20 hp never said what they gained at the track...i could care less about mph either. I think the reason that most dont lower their ET's is there isn't a significant gain in the torque which you need to lower your ET's. To me the cost of the FAST plus the TB and maybe porting isn't worth an average gain of 12 whp or a peak of 18-20 hp. The little gains it shows is way too high in the rpm band.
03-29-2009, 07:18 PM
#35
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i gained 5-10ftlbs of torque from 3000rpm and up.
and 12 peak, and that peak was 500rpm lower.
combine that with the 18rwhp and i'd say it was well worth the money...and i ported it at home in a few hours.
and considering my cam peaks at only 6300rpm....and i still gained that much peak...is proof to me that the FAST is not just for extreme high rpm setups.
as for track times...
the closest track is over 3hrs drive.
i've had my car for just shy of 6yrs....never been to a track...and only done a handfull of street races. sometimes just fun driving is all the enjoyment we get.
i could care less about being a track monkey
and 12 peak, and that peak was 500rpm lower.
combine that with the 18rwhp and i'd say it was well worth the money...and i ported it at home in a few hours.
and considering my cam peaks at only 6300rpm....and i still gained that much peak...is proof to me that the FAST is not just for extreme high rpm setups.
as for track times...
the closest track is over 3hrs drive.
i've had my car for just shy of 6yrs....never been to a track...and only done a handfull of street races. sometimes just fun driving is all the enjoyment we get.
i could care less about being a track monkey
03-30-2009, 05:34 AM
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just be sure to port it before you install it,or have someone do it for you,its worth it.If you want to do it yourself,but have questions,check out my writeup in another post in this thread^^^
