is 90mm throttle body too big for twin turbo windsor?

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eboost

Post subject: is 90mm throttle body too big for twin turbo windsor?

Posted: Mon Jun 14, 2010 6:47 pm

Getting Side Ways

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Just want to hear peoples opinions on a throttle body size for a 347 twin turbo. I have a pro products 75mm to go on but want to know if it will be too restrictive?

I know its easy to go too big in throttle body size.

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EFFalcon

Post subject: Re: is 90mm throttle body too big for twin turbo windsor?

Posted: Mon Jun 14, 2010 8:25 pm

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I don't think it'll be too much of an issue being turbo, its more of an issue off boost.

what heads/cam are you planning on running on the 347?

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EBXR8380

Post subject: Re: is 90mm throttle body too big for twin turbo windsor?

Posted: Mon Jun 14, 2010 11:43 pm

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A 65 mm will flow enough to split a std block...
It's not that it's too big!! There will be no intertransition between idle and light throttle..
I'd use a 70 / 75mm... It's not going to restrict power level..

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eboost

Post subject: Re: is 90mm throttle body too big for twin turbo windsor?

Posted: Tue Jun 15, 2010 1:30 am

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heads flow around 300cfm @600thou intake.

Cam will be along lines of 249/258 @ 0.050 585/586 with 112 lobe sep

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