Ls1 / fast 90 ?
Thread Starter
Pro
Joined: Aug 2007
Posts: 505
Likes: 2
From: VA
Ls1 / fast 90 ?
I need a little help from my friends here. I already searched and found the answers to some of my questions. I have a chance to snag a used FAST 90 intake, but have a few questions to see if it's worth it. When it's all said and done, I have a stock '99 fixed roof coupe with long tubes, Borlas and Haltech CAI.. The fast 90 is really only a deal if I can limit anything else I need to buy...otherwise I'll just keep a lookout for a used LS6 intake and call it a day.
Will the Fast 90 work with my stock throttle body? If not, what is needed?
Will my stock fuel rails and injectors work?
Thanks
Will the Fast 90 work with my stock throttle body? If not, what is needed?
Will my stock fuel rails and injectors work?
Thanks
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The FAST 90 will NOT work with your STOCK TB. It requires the use of a LS2 90 mm TB. You will also need to install a conversion wiring harness to convert the LS1/6 TB wiring to the LS2 single plug connection.
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Stock fuel rails will work
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
Drifting
Joined: Jun 2007
Posts: 1,437
Likes: 5
Stock fuel rails will work
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
R u talking about the intake or the tb?
Thread Starter
Pro
Joined: Aug 2007
Posts: 505
Likes: 2
From: VA
Stock fuel rails will work
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
Heads and cam are not to far off in the distance future..so I was kinda getting it ready to go that direction a few steps at a time without doing stuff twice. I'd like to get it to the point where all I have left is the heads and cam and drive it for a bit..then finish it up later as time and $$$ permits.
Safety Car
Joined: Mar 2005
Posts: 3,639
Likes: 8
From: Madison Wisconsin
St. Jude Donor '08
I'm doing a little at a time on my 2000 FRC as well. I just put cam/headers on it.
I was going to put an LS2 intake on my 2000 FRC with a 90mm throttle body but was told the LS6 intake with my stock throttle body would make more power. Kind of surprised me, I thought the LS2/90mm would flow better.
I was going to put an LS2 intake on my 2000 FRC with a 90mm throttle body but was told the LS6 intake with my stock throttle body would make more power. Kind of surprised me, I thought the LS2/90mm would flow better.
Thread Starter
Pro
Joined: Aug 2007
Posts: 505
Likes: 2
From: VA
I'm doing a little at a time on my 2000 FRC as well. I just put cam/headers on it.
I was going to put an LS2 intake on my 2000 FRC with a 90mm throttle body but was told the LS6 intake with my stock throttle body would make more power. Kind of surprised me, I thought the LS2/90mm would flow better.
I was going to put an LS2 intake on my 2000 FRC with a 90mm throttle body but was told the LS6 intake with my stock throttle body would make more power. Kind of surprised me, I thought the LS2/90mm would flow better.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Thread Starter
Pro
Joined: Aug 2007
Posts: 505
Likes: 2
From: VA
Thanks for the pics Bill...I found some of those during my search already. I'm a little behind/new the LS1 game. I know a lot of people have already gone down the path I'm on now..which makes life easier on me. I've been running a Ford for quite some time. I decided after I drove a friends Z06 that I wanted to do something other than go fast in a straight line. I have a fox-body with a 408 stroker and Jerico 4-speed that runs 9's ...I've come to realize I enjoy the process of building them more than the end product.
Thread Starter
Pro
Joined: Aug 2007
Posts: 505
Likes: 2
From: VA
Stock fuel rails will work
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
I would have to do some checking to see where I got my harness from
You can find some used LS2 TBs for a good price, but I when I installed mine, I had to spend some extra $$ to get it ported before it ran properly. When I installed it stock, it was a DOG on the bottom end. Had it ported, and all was well.
IMPO, unless it is a HECK of a deal, I'd spend my $$ on something that would give more bang for the buck. The Fast 90 really needs some good flowing H/C to make it perform
Just my .02
https://hinsonsupercars.com/p-934-ls...r-harness.aspx
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
I bought my harness form Casper electronics
