How can I find out if this is one of the bad FAST intakes or not??? Unless the guy is totally truthful and tells me that it has had problems, but if the guy wants to sell his car he might not be truthful and do what he can to sell it...

 

Are you by chance looking at a dark blue Formula 6 speed with a Suncoast ram air hood?

 

Do you want 500 horsepower at the crank, or at the wheels?

 

The intakes are fine.

It's the FAST TBs that had previous problems. If it's a FAST TB, you may want to sell it on Ebay and get an LS2 TB or something else.

 

No...It is a 98 Z28 Black w/ t-tops 18"foose rims

 

Or you could fix the FAST throttle body by installing a throttle return spring like a carb setup. Forget about the LS2 TB as suggested by Kraest, as they are drive by wire and will not work in your application - Corvette guys, sheesh

 

My bad. Silly F-bodies

 

I would like to get 500 at the wheels

 

It's not can it take it..... it's that what ever you're doing to get 500 hp the intake will be somewhat of a 'choke point' as far as CFM air flow.. (I'm learning a lot about this stuff lately)

if you're heads are flowing around 300 CFM, the fast 90/90 would work fine, but is only good for around 280CFM. But the stock LS6 intake won't flow too much better than around 270 CFM.

So you're saying I don't know anything?? . ... THanx do0d... THanx...


I may not have built Corvette engines, but I know enough to be dangerous.

 

I'm just playin, man.. You definetly know enough to be dangerous



Think about what you're saying, though. If the FAST 90/90 only flows 280cfm, then how can you make 650+ crank horsepower with heads that flow 330cfm on them? From the idea you're portraying, wouldn't heads that flow 300 cfm work just as well?

The answer is "No."

While the intake is a "necked-down" point, it will still provide more than enough velocity to make larger heads work and make it work much better than an LS6 intake manifold.....

 

-Cool.. I was gonna say.. Anyway this is where I got the info from

http://www.ls1tech.com/forums/showthread.php?t=732392

Also

 

http://www.procharger.com/GM/gm_auto.shtml

The end result will be much more streetable.

 

Looks like he contradicted himself there. On the first post, he says that flow above 280cfm will go unnoticed with a FAST 90/90. On the second post, he says the exact opposite.

That's just another reason I don't go to LS1Tech to ask advice... I just go there to give advice and sell/buy cars I stay in touch with Allan at Futral and watch him build a bunch of 1000 horsepower LSx "street cars", an AWD turbo 434ci wet-sleeve LS1 Escalades on 24" rims that spin all 4 tires and run low 11s that weigh 6000+ lbs, and a bunch of money-making cars that will never be released on the internet.

 

Your options are a very streetable nitrous car, a stroker motor, a forced induction setup, or a heads/cam 346 that you have to wait until 4000rpm to make anything that resembles power and has a giant camshaft 24x/24x duration at .600+ lift)

 

Patrick G deserves A LOT less credit than everyone gives him over there. "His 500rwhp recipe" is basically a write-up of someone else's work, as there are several people/companies that have been making identical numbers (utilizing the same basic principles) on ported stock casting cylinder heads through an LS6 intake - 3 years ago. Additionally, he used to be the small cam ****, putting down anyone who ran a cam bigger than his 224/228 or whatever, claiming that bigger cams offered no further benefits. Well look what he recently switched to, and the results of it

The whole EMO queer sig pics that are spreading like wildfire over there have really turned me off to what was once a quality tech site.