JS

iTrader: (4)

As u guys know I just swithed from the LS6/PTB to the FAST LSX/90...
I did the mods to the throttle body (PEEN MOD AND THE SCREW MOD)

Ported the intake to match my heads and bolted everything up.
Retuned it and went to the the track in almost the same air I had 3 weeks ago.(within 50 ft)

Results
LSX/90 TB netted me a solid .16 in ET
LSX/90 TB netted me a solid 2.1 in MPH

U need to tune it as it wants more fuel (on my car)down low but it seemed pretty good up top (12.7 A/F).

Anyone wanting to do these mods--------->DO IT
Just do the tweeks to the TB and take your time installing the intake.

COMP U MAKE A GREAT PRODUCT!!!!!

SMOKIN01TA

iTrader: (10)

i loved the one i used for the shootout, and best thing was it that it did require any tuning to run perfect.

JS

iTrader: (4)

Your right,it doesnt need much but I added alittle fuel from 3300 to 5100....
I wanna thank u for testing it,I bought it right after I saw your results

ty_ty13

iTrader: (42)

I am waiting to install the 90 lsx combo...these mods you did to the TB please give a detailed description of what you did...post pics if you have...thanks in advance

smokin' joe 00 ss

Another happy LSX 90mm intake user The 90mm setup really kicks *** on a H/C 346 and it makes good power down low too.

jcarroll845

iTrader: (5)

Could you either describe this modificaiton or link it to this thread? I would like more info... I am switching intakes and tbs is a few days. Thanks.

LawmanSS

iTrader: (19)

This is a very long thread, but it should answer most of your questions about the problems folks are having and how to do the above mentioned mods:

https://ls1tech.com/forums/generation-iii-external-engine/203226-well-made-cough-fast-90mm-throttle-bodies.html

jcarroll845

iTrader: (5)

That's just what I needed. Thank you. Looks to me like I should reconsider. Seems a lot of people are having issues with the FAST products.

Beast96Z

iTrader: (21)

That is why he posted this thread. It is to show that if you take the time to do these 2 simple things, you shouldn't have a problem. I agree that it is something that should be done in the first place, but it saved me $100 over a TPIS TB and I get to keep my stocker, which is worth $50-$75. I'll do these 2 rather simple mods to save that much money and keep my stock breather hooked up.

JS

iTrader: (4)

As usual the BEAST comes to the rescue
All kidding aside,do the tweeks and take your time...

THE INTAKE/TB WORK

jcarroll845

iTrader: (5)

Yeah, I will probably still use the FAST stuff. It just ticks me off that you pay so much and then have to mess with it. My BBK 85mm just bolted right up and worked perfect.

Thanks again.

JS

iTrader: (4)

I've seen the new 90,it does have the shaft mod
If u look at it the best way to tell is if the shaft is flat on one side,thats the new and improved one but they still didnt do the peen mod.

U still need to do that too.

jcarroll845

iTrader: (5)

Very interesting. Thanks for the info.

smokin' joe 00 ss

Plus on the TPIS I still had the throttle hang up once in a while after I jumped on it hard, it would hang up around 2000 rpm's so I had to ad a extra carb. style throttle spring to fix the problem.

jcarroll845

iTrader: (5)

Amazing... all expensive junk. LOL The old addage "you get what you pay for" doesn't apply to our TBs! LOL

Thanks for the info.

11SECSS

iTrader: (199)

Do you guys think a LSX78 would be just as good improvement on my stock LS1 motor say switching from a LS6 intake and adding a 80mm throttle body any thuoghts would be helpful

jcarroll845

iTrader: (5)

I've heard that on a stocker, the LS6 and BBK 85mm is more than enough. The motor doesn't demand more than that. That's what I've been running up until this point and I've been very pleased.

The down side to this is now I have to buy another setup since I want to go bigger and badder. I kinda wish I had just bought the FAST stuff from the beginning and saved the money.

If you're not planning on going much beyond the stock internals, LS6 and BBK is a good combo.

BTW, my BBK never had any of the problems the FAST tb is having with sticking etc. It worked flawlessly from install to present day.

mike c.

iTrader: (1)

well...i would of thought the fast lsx w/90mm would be too much for a 346. i have a 348ci with heads and cam...looks like i'll be buying the fast intake and 90mm th-body too. thanks for this post.