78mm FAST LSX?????
Thread Starter
On The Tree
Joined: Sep 2002
Posts: 141
Likes: 0
From: OKC
78mm FAST LSX????? I heard that an LS6 intake will only flow 275 cfm through the runners and that I need a 78mm FAST intake. My heads flowed 311 on the intake side with stock valves and I am putting 2.02 in them now. I am told that the FSAT intake will make a big diffrence on my setup. Does anyone have any input on this??? Any and all help is much appreciated.
Originally Posted by 99HUGGSS
I heard that an LS6 intake will only flow 275 cfm through the runners and that I need a 78mm FAST intake. My heads flowed 311 on the intake side with stock valves and I am putting 2.02 in them now. I am told that the FSAT intake will make a big diffrence on my setup. Does anyone have any input on this??? Any and all help is much appreciated.
if you're gonna spend the $$$ on FAST, go 90MM. or go with a LS2 setup and save a chunk. either way, don't waste your cash on a 78mm, the results just aren't worth the $$ imho.
TECH Addict
Joined: Feb 2004
Posts: 2,826
Likes: 0
Originally Posted by 99HUGGSS
thanks guys, I was worried about the 90mm setup losing power since I have stock displacement. If that is what I need, that is what I will get. Thanks again!!!
Originally Posted by Another_User
Must....perform...search. Seriously, go to the LS2/LS7 forum and check out what happened to the guy who installed a 90mm LS2 intake and TB on a stock cube engine. It wasn't pretty.
he did make more power(on the dyno though) keep that in mind...
Trending Topics
Thread Starter
On The Tree
Joined: Sep 2002
Posts: 141
Likes: 0
From: OKC
Originally Posted by Another_User
Must....perform...search. Seriously, go to the LS2/LS7 forum and check out what happened to the guy who installed a 90mm LS2 intake and TB on a stock cube engine. It wasn't pretty.
you'll love your S3, they are awsome!!!
I saw that thread, but it sounds like there is another issue with his car. I was under the impression that the FAST intake flowed a little more air than the LS2. I aslo had a little fear of the 90mm tb being a little large for a stock displacement motor. I am thinking of a larger cam and I spin this thing to about 7100 rpm, that's why I was thinking the LS6 might be a little restricting. Oh well, more reasearch
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Running a cam as large as you are, you'll definitely see gains out of a 90mm setup. Too many people w/stock displacement motors have seen gains from them for one case to make such a huge case against them. My vote still goes to the FAST 90mm in this case.
Originally Posted by guadofreak
he did make more power(on the dyno though) keep that in mind...
No I did not make more power. Go back and read the thread again.
Brad
On the subject of 78mm FAST intakes (forget the FAST 90mm and LS2, definitely not applicable here), what does everyone think about it (along with a ported stock throttle body of course) on a stock internals/bolt on only car?
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
TECH Addict
Joined: Feb 2004
Posts: 2,826
Likes: 0
Originally Posted by LS1LT1
On the subject of 78mm FAST intakes (forget the FAST 90mm and LS2, definitely not applicable here), what does everyone think about it (along with a ported stock throttle body of course) on a stock internals/bolt on only car?
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
On The Tree
iTrader: (3)
Joined: Nov 2004
Posts: 178
Likes: 0
From: Park Ridge, IL (Borders Chicago)
Originally Posted by LS1LT1
On the subject of 78mm FAST intakes (forget the FAST 90mm and LS2, definitely not applicable here), what does everyone think about it (along with a ported stock throttle body of course) on a stock internals/bolt on only car?
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
TECH Fanatic
Joined: Dec 2001
Posts: 1,060
Likes: 0
From: MI
Originally Posted by LS1LT1
On the subject of 78mm FAST intakes (forget the FAST 90mm and LS2, definitely not applicable here), what does everyone think about it (along with a ported stock throttle body of course) on a stock internals/bolt on only car?
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
Worth it or just go LS6 (have LS1 intake on now with an LS6 in the basement).
In your case I would go with the LS6.
TECH Fanatic
Joined: Dec 2001
Posts: 1,060
Likes: 0
From: MI
Originally Posted by SquintzPallatore
No I did not make more power. Go back and read the thread again.
Brad
Brad
Man that sucks that you didn't make any more power I made 27 rwhp more than my LS6 setup and I'm running a smaller B1 cam with stage 2 heads and the car pull's so much harder too.
Originally Posted by smokin' joe 00 ss
Man that sucks that you didn't make any more power I made 27 rwhp more than my LS6 setup and I'm running a smaller B1 cam with stage 2 heads and the car pull's so much harder too.
Thanks for the info man. Wish I had as much luck with this LS2 intake. I am seeing more and more good results with the LSX 90mm intake on 346's. Did you gain any torque? Mind emailing me some before n after graphs? I already have a 90mm TB and just need a good intake now.
brad.blankenship@us.army.mil
Thanks!
Brad
Originally Posted by SquintzPallatore
Thanks for the info man. Wish I had as much luck with this LS2 intake. I am seeing more and more good results with the LSX 90mm intake on 346's. Did you gain any torque? Mind emailing me some before n after graphs? I already have a 90mm TB and just need a good intake now.
brad.blankenship@us.army.mil
Thanks!
Brad
brad.blankenship@us.army.mil
Thanks!
Brad
