90 mm Throttle Body??

Iroc89 · 10-19-2005, 12:15 PM

Hi all,
I am building my very own LS1 at home as a project and I was debating on what size throttle body I was going to put on. I was also thinking about buying one of those comp cams/fast LSX intake manifolds. I was just wondering if anyone had any opinions on what size throttle body I should use. I'm only asking this question because in the past I've heard some negative things about 90mm so??

MOLESTER · 10-19-2005, 04:59 PM

it depends on the power you plan on running. if your not shooting for more than 600 i wouldnt bother. an engine needs to be somewhat matched with how much air is coming in and how much out. So if your running a large cam, heads, and headers id'e go with the lsx and a larger throttle body. hope that helps.

**sscrazy** · 10-20-2005, 02:59 PM

like molestor said, it pretty much depends on your application. cubic inch , cam size, head flow.

**1QuikWS6** · 10-29-2005, 02:18 AM

If you go with a set of AFR 205's milled .030, with Comp XER cam, either 36# or 42# injectors, aftermarket fuel rails, Walbro pump, larger MAF, appropriate 'fine tuning', LT's, no cats, good catback, and the Fast 90/NW90 combo; the gains will be impressive - in the upper 400 range for both RWHP/RWTQ.

On a basically otherwise stock car the LS6 intake is fine and the gains you see from a 90/90 combo is not worth the cost.

If you're willing to ante up all the $$ for a setup similar to what I mentioned above, then get in touch with Tony @ AFR and he can help you with the setup/parts selection. Every car that has followed his recipe to the last detail has dynoed in the upper 400 RWHP/RWTQ range.

-Jay-