View Poll Results: Whp gain with:TPIS 90MM intake/90mm tb fully ported??
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Whp gain with:TPIS 90MM intake/90mm TB fully ported??
#1
Burning Brakes
Thread Starter
Whp gain with:TPIS 90MM intake/90mm TB fully ported??
Lets make a small poll for this one
I got a 383 and im putting down 490whp/461wtq with a stock untouched ls6 intake and stock untouched 78mm tb.So i was looking to improve my intake.
Note:
1-I did not use a Fast 90 or 92 because i had one on my first setup and the lower sheel cracked twice because of the cheap plastic.
2-I did not use a Fast 102 because after some test fit,it was rubbing/hitting my cowl.There is no way i would cut my car for a intake and will not use shorter engine mount.
So the TPIS 90mm ls6 was the way to go.A solid ls6 gm base with a 90mm opening.But they are kinda rare in the used market.Ive found one a couple weeks ago for a faire price and bought it.I will use a 90mm ls2 tb.Both will be professionaly ported and the transition between the tb and the intake opening will be seem-less.
So simple question:
After some tune adjustment ,how much whp should i gain ???
Hoping for at least 20whp
Thanks
Eric
I got a 383 and im putting down 490whp/461wtq with a stock untouched ls6 intake and stock untouched 78mm tb.So i was looking to improve my intake.
Note:
1-I did not use a Fast 90 or 92 because i had one on my first setup and the lower sheel cracked twice because of the cheap plastic.
2-I did not use a Fast 102 because after some test fit,it was rubbing/hitting my cowl.There is no way i would cut my car for a intake and will not use shorter engine mount.
So the TPIS 90mm ls6 was the way to go.A solid ls6 gm base with a 90mm opening.But they are kinda rare in the used market.Ive found one a couple weeks ago for a faire price and bought it.I will use a 90mm ls2 tb.Both will be professionaly ported and the transition between the tb and the intake opening will be seem-less.
So simple question:
After some tune adjustment ,how much whp should i gain ???
Hoping for at least 20whp
Thanks
Eric
Last edited by always faster; 11-02-2013 at 11:56 AM.
#2
Safety Car
I only picked up 11 rwhp on my heads/cam C5, from about 3,500rpm and up, lost a bit below that though, ported Fast 92/90 and a well respected tuner.....I was hoping for more but I got about what he told me to expect....
#5
Burning Brakes
Thread Starter
Would it hurt me a lot by skipping the porting job on the intake ???I mean if spending 125$ + both shipping from canada for a port job is useless i would not do it.
I could just slap the ported ls2 tb on it and thats it.Maybe tring to make a seem-less transition myself but left the intake in stock form.
I could just slap the ported ls2 tb on it and thats it.Maybe tring to make a seem-less transition myself but left the intake in stock form.
#6
Race Director
Member Since: Dec 2006
Location: Fort Worth, Texas
Posts: 11,095
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Curious what heads you're running?
FWIW here's my results from an LS6 to a 92...
http://forums.corvetteforum.com/perf...-maf-10hp.html
FWIW here's my results from an LS6 to a 92...
http://forums.corvetteforum.com/perf...-maf-10hp.html
#7
Burning Brakes
Thread Starter
Im running:
PRC LS6(243) stage 2.5 : http://www.texas-speed.com/p-4-prc-s...ted-heads.aspx
383 ci built by TSP(all callies) 11:1 CR
Cam: 240/244 ,.615"/.619" @ 113 lsa (EXR lobe)
All the support mod(ARH 1 7/8 ,Vararam,morel lifter,manton custom pushrods, etc etc)
Built tr6060/c6z diff complete setup,twin disc clutch,adj master,poly tube coupler etc etc)
No cheap parts but did wanted to say simple.
PRC LS6(243) stage 2.5 : http://www.texas-speed.com/p-4-prc-s...ted-heads.aspx
383 ci built by TSP(all callies) 11:1 CR
Cam: 240/244 ,.615"/.619" @ 113 lsa (EXR lobe)
All the support mod(ARH 1 7/8 ,Vararam,morel lifter,manton custom pushrods, etc etc)
Built tr6060/c6z diff complete setup,twin disc clutch,adj master,poly tube coupler etc etc)
No cheap parts but did wanted to say simple.
Last edited by always faster; 11-09-2013 at 01:50 PM.
#8
Race Director
Member Since: Dec 2006
Location: Fort Worth, Texas
Posts: 11,095
Received 2,042 Likes
on
1,300 Posts
Im running:
PRC LS6(243) stage 2.5 : http://www.texas-speed.com/p-4-prc-s...ted-heads.aspx
383 ci built by TSP(all callies) 11:1 CR
Cam: 240/244 ,.615"/.619" @ 113 lsa (EXR lobe)
All the support mod(ARH 1 7/8 ,Vararam,morel lifter,manton custom pushrods, etc etc)
Built tr6060/c6z diff complete setup,twin disc clutch,adj master,poly tube coupler etc etc)
No cheap parts but did wanted to say simple.
PRC LS6(243) stage 2.5 : http://www.texas-speed.com/p-4-prc-s...ted-heads.aspx
383 ci built by TSP(all callies) 11:1 CR
Cam: 240/244 ,.615"/.619" @ 113 lsa (EXR lobe)
All the support mod(ARH 1 7/8 ,Vararam,morel lifter,manton custom pushrods, etc etc)
Built tr6060/c6z diff complete setup,twin disc clutch,adj master,poly tube coupler etc etc)
No cheap parts but did wanted to say simple.
#9
Burning Brakes
Thread Starter
I dont know the KPA reading since im do not tune the car.
If i can have someting in the 505whp/480wtq minimum range, i ll be happy
#10
Drifting
Did you use the button head bolts on the valley when you had your first fast 90? It's a common problem for people not to install them and they end up cracking the intake.
Anyway, on a 383, you will pick up 30 from 4k and up with a fast/ls2 tb, no doubt about that. I even gained 25 on my little 346.
Anyway, on a 383, you will pick up 30 from 4k and up with a fast/ls2 tb, no doubt about that. I even gained 25 on my little 346.