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ls6 vs Fast 90 for F/I

Old 08-02-2007, 12:35 AM
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Default ls6 vs Fast 90 for F/I

I think I will be doing a 402 with the small AFR 205's ported by tony, D1sc at about 10lbs. I was wondering what you guys thought about me reusing my ls6 intake? I know that this is not optimal but I really dont have the money to go out and spend 1100 dollars on an intake and tb right now.
anyone running this intake on the larger ci motors? What kind of power are you making and how much do you guys think I will be leaving on the table without it?
Thanks
Brian
Old 08-02-2007, 12:43 AM
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Im building my first FI setup right now. I just sold my Fast and bought an ls6 because i heard that the fast does not hold up well to alot of boost and can start to leak. Also i dont think its worth the money with boost because the intake is pressurized and flow isnt as important as an N/A application. Just my .02. Hope this helps.
Old 08-02-2007, 12:48 AM
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I have heard both of the same reasons. I also thought that with the boost pressure it wouldnt be a huge diffrence, but I would like to hear from those who have done both.
Old 08-02-2007, 03:29 AM
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Pretty sure the fast can handle 20psi no problem. have talked to a few guys that have run it up to about that psi . I bought one and plan on using one. I can't see every going past 15 psi even and saw an article mayber high tech performance or somehwere where it was used on like a 1000 hp buildup on some 408 or something.
I like the direct port option also. I have installed it on my 346 for now and it might be hurting my low end some but the mid and top seems to pull good. I have 90 mm and 90 mm tb. I bought that size as going with 408 or 427 likely.
I sold my ls6 and ported tb. Maybe should have kept it in hindsight.
Old 08-02-2007, 08:48 AM
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Most of the people putting out big numbers are using the LS6 intake. The Procharger will make up the difference.


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