dyno comparison: ls6 intake/ported TB vs FAST 90/90 ported
#1
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Join Date: Sep 1998
Location: US 1 Mile Marker 52 in the Florida Keys
Posts: 8,323
dyno comparison: ls6 intake/ported TB vs FAST 90/90 ported
finally bit the bullet on the FAST intake. got it for a good price considering it was already partially ported and came with other stuff.
got in touch with a shop up on the West coast about doing a before/after dyno session to get some definative numbers to compare the setup on a cam only engine.
i'll go through some background on the car
dyno after i had the cam installed, which was a 233/233 .589"/.589 112* Torquer V1.
car had lid, maf ends, ported TB, ls6 intake, Flowtech LTs, orp, 3" dynomouth exhaust....stock clutch and rear end...as well as stock 16" rims (245/50/16s).
car made 382rwhp and aprox 375ftlbs of torque (hard to tell due to clutch slip)
since that dyno i've upgraded the following:
Spec 4 clutch with Fidanza alum flywheel, 3" true duals with magnaflow 4x9 mufflers, harland sharp 1.7 roller rockers, Meziere electric water pump, and swapped over to 17x11 ZR1s with 315 nitto555.
i had the shop run the car on the dyno for a baseline to check the WOT tune and to see the numbers.
the tune was halfway decent, but they only ran the car up to about 6100rpm. the torque had fallen off but the hp was barely climbing. it peaked out at 386rwhp, but we think it would have made 390hp pretty easily had it been reved to peak. mind you this was with the LS6 intake manifold.
after doing the runs, i pulled the manifold off the car and swapped on the ported FAST 90/90 intake manifold.
the car never came off the dyno, and was done on the same day.
first run was way lean, and after tweaking we got results that were quite surprising! not only was the car dead consistent...varying only 1-1.5hp peak, and less than 1ftlb of torque...even after getting heat soaked. but it also showed an impressive gain in across the ENTIRE rpm band.
ended up picking up ~11ftlbs peak, while shifting that peak down about 500rpm. in the low rpm it gained from 5-8ftlbs of torque from about 3000 to just over 4000rpm.
for the Hp curve, it gained aprox 18hp peak....this is assuming it would have made 390rwhp had the baseline pulled higher.
but even going by the peak that the baseline made...at 6100rpm the FAST made +15hp and +12ftlbs of torque over the LS6.
while my cam is relatively large, it not BIG by any means. and the grind is a fairly old design, not even sold any more. bigger cam only cars could see similar if not higher gains, particularly if you rev higher. i was surprised the hp peaked where it did...and am GLAD. really shows where the stock heads start to fall off.
things to consider:
- the intake was initially lightly ported by LPE, but they left some big "steps" just inside the runners. so i cleaned those up and smoothed them out. this was NOT a high dollar custom port job! intake was never separated, and my touch up was done in 2 hrs with a dremel.
- and this is all on STOCK HEADS
I'm not sure about issues with sponsorship, but the shop is extremely good and they were VERY helpful in getting these numbers.
not only did they give me a GREAT price, they were helpful in getting the intake swapped over, and the car tuned and dialed in. the part throttle manners of the car are greatly improved and the peak power numbers speak for themselves.
PM me for the shop name and contact info
got in touch with a shop up on the West coast about doing a before/after dyno session to get some definative numbers to compare the setup on a cam only engine.
i'll go through some background on the car
dyno after i had the cam installed, which was a 233/233 .589"/.589 112* Torquer V1.
car had lid, maf ends, ported TB, ls6 intake, Flowtech LTs, orp, 3" dynomouth exhaust....stock clutch and rear end...as well as stock 16" rims (245/50/16s).
car made 382rwhp and aprox 375ftlbs of torque (hard to tell due to clutch slip)
since that dyno i've upgraded the following:
Spec 4 clutch with Fidanza alum flywheel, 3" true duals with magnaflow 4x9 mufflers, harland sharp 1.7 roller rockers, Meziere electric water pump, and swapped over to 17x11 ZR1s with 315 nitto555.
i had the shop run the car on the dyno for a baseline to check the WOT tune and to see the numbers.
the tune was halfway decent, but they only ran the car up to about 6100rpm. the torque had fallen off but the hp was barely climbing. it peaked out at 386rwhp, but we think it would have made 390hp pretty easily had it been reved to peak. mind you this was with the LS6 intake manifold.
after doing the runs, i pulled the manifold off the car and swapped on the ported FAST 90/90 intake manifold.
the car never came off the dyno, and was done on the same day.
first run was way lean, and after tweaking we got results that were quite surprising! not only was the car dead consistent...varying only 1-1.5hp peak, and less than 1ftlb of torque...even after getting heat soaked. but it also showed an impressive gain in across the ENTIRE rpm band.
ended up picking up ~11ftlbs peak, while shifting that peak down about 500rpm. in the low rpm it gained from 5-8ftlbs of torque from about 3000 to just over 4000rpm.
for the Hp curve, it gained aprox 18hp peak....this is assuming it would have made 390rwhp had the baseline pulled higher.
but even going by the peak that the baseline made...at 6100rpm the FAST made +15hp and +12ftlbs of torque over the LS6.
while my cam is relatively large, it not BIG by any means. and the grind is a fairly old design, not even sold any more. bigger cam only cars could see similar if not higher gains, particularly if you rev higher. i was surprised the hp peaked where it did...and am GLAD. really shows where the stock heads start to fall off.
things to consider:
- the intake was initially lightly ported by LPE, but they left some big "steps" just inside the runners. so i cleaned those up and smoothed them out. this was NOT a high dollar custom port job! intake was never separated, and my touch up was done in 2 hrs with a dremel.
- and this is all on STOCK HEADS
I'm not sure about issues with sponsorship, but the shop is extremely good and they were VERY helpful in getting these numbers.
not only did they give me a GREAT price, they were helpful in getting the intake swapped over, and the car tuned and dialed in. the part throttle manners of the car are greatly improved and the peak power numbers speak for themselves.
PM me for the shop name and contact info
#3
Registered User
Thread Starter
Join Date: Sep 1998
Location: US 1 Mile Marker 52 in the Florida Keys
Posts: 8,323
since you got heads too....i would absolutely look into the FAST.
you should see nice gains.
i was pleasently surprised to see how much i picked up, particularly in the low and mid range
you should see nice gains.
i was pleasently surprised to see how much i picked up, particularly in the low and mid range
#5
Good job That's not too bad cam/intake only. Much better than before.
Comparatively, I made 414/38* on my cam-only with the bigger F-15 236/239 with an LS6 intake manifold on the Vette (underdrive pulley as well) and now 415/395 with an LS6 intake on the Camaro (no UD pulley and no electric waterpump) with a much smaller 232/234 F-14 HL.
Invest in a better camshaft, and you'll REALLY make some power
I always talk about the FAST 90/90 being worth around 15-20rwhp and torque over the LS6 intake manifold on a heads/cam setup and even 10-15rwhp and torque on a cam setup. Looks like you are another person who found out
Good deal, bro
Comparatively, I made 414/38* on my cam-only with the bigger F-15 236/239 with an LS6 intake manifold on the Vette (underdrive pulley as well) and now 415/395 with an LS6 intake on the Camaro (no UD pulley and no electric waterpump) with a much smaller 232/234 F-14 HL.
Invest in a better camshaft, and you'll REALLY make some power
I always talk about the FAST 90/90 being worth around 15-20rwhp and torque over the LS6 intake manifold on a heads/cam setup and even 10-15rwhp and torque on a cam setup. Looks like you are another person who found out
Good deal, bro
#6
Registered User
Thread Starter
Join Date: Sep 1998
Location: US 1 Mile Marker 52 in the Florida Keys
Posts: 8,323
thanks mike.
i was a bit disappointed when the car only did ~390hp before the intake. i figured with the upgrades i had done since the old dyno, that i would have been closer to 400rwhp.
take this with a grain of salt, but the owner of the shop said the dyno tends to be a bit on the stingy side.
but regardless, that doesnt change the end results, since it was done on the same dyno.
wish there was one closer to me, i'd try on another dyno for ****s-n-giggles.
i was a bit disappointed when the car only did ~390hp before the intake. i figured with the upgrades i had done since the old dyno, that i would have been closer to 400rwhp.
take this with a grain of salt, but the owner of the shop said the dyno tends to be a bit on the stingy side.
but regardless, that doesnt change the end results, since it was done on the same dyno.
wish there was one closer to me, i'd try on another dyno for ****s-n-giggles.
#11
My car only posted 400hp/366tq on a Mustang dyno and it actually makes quite a bit more power than that based on actual 1/4 mile mph vs. weight calculations.
Dynos are tuning/comparison tools only and by comparison I mean like the OP did.
#12
Please don't go by dyno numbers unless you dynoed on the same machine the same day. You could actually be making more usable power than the OP.
My car only posted 400hp/366tq on a Mustang dyno and it actually makes quite a bit more power than that based on actual 1/4 mile mph vs. weight calculations.
Dynos are tuning/comparison tools only and by comparison I mean like the OP did.
My car only posted 400hp/366tq on a Mustang dyno and it actually makes quite a bit more power than that based on actual 1/4 mile mph vs. weight calculations.
Dynos are tuning/comparison tools only and by comparison I mean like the OP did.
This guy said he had it done at FMS and lives in Mississippi.. I'd have to say that he got it done at Futral and his numbers are pretty accurate. 400rwhp through an unlocked auto on a Dynojet 248... sounds pretty close. The Dart 205cc heads are on the smaller side and the Torquer line of cams (especially the older versions) don't really put good power down from what I've seen.
#13
If mine's right then yours is wrong
There's almost 6mph difference between what you mph with a stick and I mph thru an auto. Unless your raceweight is 400lbs higher than mine then there's more than 30hp difference.
That's why I take any and all dyno numbers with a grain of salt and will never get upset because a simular set up dynos more than me. Now when a simular set up out mphs me at the track then I'm looking.
A typical local example is a 3rd gen buddy with a built 388 TPI m6 dynoed 415hp on the same dyno that I did 400hp on but he only managed 114mph in the 1/4 the same day same track that I ran 121mph. The next day he took his dyno numbers out if his sig. Dynos are for tuning.
#14
I know all of that.
If mine's right then yours is wrong
There's almost 6mph difference between what you mph with a stick and I mph thru an auto. Unless your raceweight is 400lbs higher than mine then there's more than 30hp difference.
That's why I take any and all dyno numbers with a grain of salt and will never get upset because a simular set up dynos more than me. Now when a simular set up out mphs me at the track then I'm looking.
A typical local example is a 3rd gen buddy with a built 388 TPI m6 dynoed 415hp on the same dyno that I did 400hp on but he only managed 114mph in the 1/4 the same day same track that I ran 121mph. The next day he took his dyno numbers out if his sig. Dynos are for tuning.
If mine's right then yours is wrong
There's almost 6mph difference between what you mph with a stick and I mph thru an auto. Unless your raceweight is 400lbs higher than mine then there's more than 30hp difference.
That's why I take any and all dyno numbers with a grain of salt and will never get upset because a simular set up dynos more than me. Now when a simular set up out mphs me at the track then I'm looking.
A typical local example is a 3rd gen buddy with a built 388 TPI m6 dynoed 415hp on the same dyno that I did 400hp on but he only managed 114mph in the 1/4 the same day same track that I ran 121mph. The next day he took his dyno numbers out if his sig. Dynos are for tuning.
#15
My car only weighs 3090 but sadly with my fat butt in the seat it goes across the scales at 3340 so there's only about 260ish dofference.