[Z06] 90mm intake question...
Thread Starter
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,601
From: Honolulu HI
90mm intake question...
Is a 90mm TB & intake set up on a stock or mostly stock (CAI, LT's or shorties) LS6 overkill? I'm of the opinion that unless you have a H/C set-up or FI set-up, the larger intake & TB can noticeably hurt bottom end peformance. Opinions or facts please. Thanks. 
Safety Car
Joined: Jul 2004
Posts: 3,904
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From: Vancouver Washington
I've also seen H & C cars that weren't helped by a 90/90 set up.
Pro
Joined: Feb 2007
Posts: 621
Likes: 2
From: La Quinta Ca
i have the 90/90 fast combo on my 03 z06 with full intake and exhaust i put down 404rwhp and 372 whtq, one thing i did notice is it got a little slugish down low, hopefully the cam im installing next week will help with that problem, ill also be swaping out my shorty headers for long tubes
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
LS6 engines ( stock cubes) are not helped that much by a 90/90. There are a few ponies, but not many. so the added cost may not be beneficial, vs the stock LS6 intake and LS6 TB. LTs, and PP heads, proper valves, spings and a cam is were you will see real gains
On a LS2, LS3 or bored out LS6 is were a Fast 90/90 or 92/92 sees significant gains
I run a stock LS6 intake, polished to clean up some ruff edges, but not ported, TPIS PP 78mm intake and a 224r comp. cam, 918 springs. LTs, High flow cats and straight pipes. We just retuned for this year and still 400 rwhp and 407 rwtq with immediate throttle response. No lag what so ever
On a LS2, LS3 or bored out LS6 is were a Fast 90/90 or 92/92 sees significant gains
I run a stock LS6 intake, polished to clean up some ruff edges, but not ported, TPIS PP 78mm intake and a 224r comp. cam, 918 springs. LTs, High flow cats and straight pipes. We just retuned for this year and still 400 rwhp and 407 rwtq with immediate throttle response. No lag what so ever
Last edited by AU N EGL; Mar 29, 2009 at 07:17 AM.
