having 2nd thoughts about adding FAST 90 + LS2 Throttle body
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Pro
Joined: Jul 2014
Posts: 524
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From: Allenspark Colorado
having 2nd thoughts about adding FAST 90 + LS2 Throttle body
I had a mild head/cam build done about 4000 miles ago, dyno'd 406/370. Runs awesome but I was thinking that finishing off with a ported FAST 90 + LS2 throttle body would be a nice way to add 10-20 additional ponies (and torque) and kind of be the "icing on the cake".
So, I secured a FAST 90, LS2 throttle body and the adapter harness. I cleaned the intake pretty good in preparation to have in ported along with the throttle body, and then have my guy install and retune and call it a day.
However, I'm really loving the way the car runs right now and with porting, install & retune I'm looking at an additional $1K (give or take) and risk changing the way the car runs (most likely for the better/stronger but just saying).
Those of you that were in a similar situation and went ahead with installing the FAST intake, was it worth it? Does the car run as good as before?
I guess I'm having second thoughts about just leaving it as is since I'm super happy with it right now…… I can easily sell the FAST combo for no loss so that's an option.
Any suggestions or advice?
So, I secured a FAST 90, LS2 throttle body and the adapter harness. I cleaned the intake pretty good in preparation to have in ported along with the throttle body, and then have my guy install and retune and call it a day.
However, I'm really loving the way the car runs right now and with porting, install & retune I'm looking at an additional $1K (give or take) and risk changing the way the car runs (most likely for the better/stronger but just saying).
Those of you that were in a similar situation and went ahead with installing the FAST intake, was it worth it? Does the car run as good as before?
I guess I'm having second thoughts about just leaving it as is since I'm super happy with it right now…… I can easily sell the FAST combo for no loss so that's an option.
Any suggestions or advice?
Last edited by RockyMtC5; Apr 30, 2016 at 10:48 AM.
Drifting
Joined: Feb 2010
Posts: 1,310
Likes: 99
From: Arlington Texas
The drive ability is all in the tune. The 90/90 setup is not going to cost you any drive ability if tuned properly. The rest is if you want more power or not. If you are a spot where you are happy then stick with what you have done already.
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From: Allenspark Colorado
1/4 mile/AutoX
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From: Buffalo Texas
Burning Brakes
Joined: Jul 2001
Posts: 1,131
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From: Youngsville North Carolina
It looks like you have a 2003 and that is an important part of the decision as you have the updated intake from the factory.
I have an 02 with a mild H+C setup (439/403) and I have not swapped out the intake. The factory throttle body was ported by the shop who did the install.
Like you I have often thought about doing the same upgrade though....most people have advised it isn't worth it.
I have an 02 with a mild H+C setup (439/403) and I have not swapped out the intake. The factory throttle body was ported by the shop who did the install.
Like you I have often thought about doing the same upgrade though....most people have advised it isn't worth it.
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2020 Corvette of the Year Finalist (performance mods)
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I think this is a double edged sword type situation... the fast will no doubt give you some gains but it really shines when you get into the mid/upper 400's, in the low end of 400's the gains may not be as great... so you could go ahead and install it now, gain a bit, and leave the table open for even bigger gains later on when you go with better heads/cam... or you can hang onto it, save some money at the moment, and install it later on when you do better heads/cam... if you ever decide to boost the car then you can get rid of the fast intake, it will no longer be needed and they are known for cracking when under pressure
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Le Mans Master
Joined: Oct 2002
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From: dudley MA
I have had the FAST 90mm intake on my car for at least 5yrs with no problems. I put down 453rwhp and 420rwtq with a 228-232 cam with 4:10 gears. If it was me, I would put the FAST on. If you are happy the way it is, then leave it.
Pro
Joined: Mar 2004
Posts: 714
Likes: 104
From: Springfield Ohio
Put it on - you have it so why not get some use out of it? If you don't already have a CAI, you should add that with the intake and TB. You may also need bigger injectors if your's are stock. Your tuner can tell you the duty cycle of your current injectors but they have to very close to max with what you have. Everything will be better and driveability will only be enhanced.
Melting Slicks
Joined: Feb 2014
Posts: 2,725
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From: chicago area IL.
i have a ported fast 92mm/ls2 TB on my car its full bolt on BTR stg II prc 2.5 243's daily drive it no surging or any thing car drives stock like, why do you think it would hurt driveability?
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Joined: Jul 2014
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From: Allenspark Colorado
Thanks everyone, I'm holding onto the parts and will install in the future, whenever I'm feeling the itch for more.... Or in combo with a bigger cam. I'll get it ported in the next couple months so it's ready to install by late summer.