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post #1 of 16 (permalink) Old 06-26-04, 10:27 PM Thread Starter
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Throttle body

Is anybody running a 90mm throttle body?Or know anybody who is?If so what engine set up are they running?


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post #2 of 16 (permalink) Old 06-26-04, 10:55 PM
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Re: Throttle body

90mm t/b is over kill, the biggest that your engine will probly require is maybe a 82mm t/b, off the t3, but even then a 75mm will give you the best all round response, with out killing bottom end torque, and still flows really well up high.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

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post #3 of 16 (permalink) Old 06-26-04, 11:03 PM Thread Starter
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Re: Throttle body

Eb....you are running a 75mm t/b on a five litre and not turning it as hard as I am,and I have a few more cubes as well !
As I said before,I am learning so I am open to discussion.

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post #4 of 16 (permalink) Old 06-26-04, 11:11 PM
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Re: Throttle body

for the sake of asking a siilly question, as we are learning and sharing, wouldn't a set of twin 40's or similar be a more tractable set up than one big 90mm one?

I can understand a custom upper would need fabricating but in theory would the twin set up be best?
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post #5 of 16 (permalink) Old 06-26-04, 11:26 PM
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Re: Throttle body

you can get a twin 58mm t/b setup off a f series, as far as you having more cubes that will help you out but it doesn't nessicerily mean that you need a t/b of that size, i've got a motor that has been built to see over 6500rpm, strokers wern't designed to do those sort of revs, more for low down torque. as i said before the bigger you go with the t/b the more bottom end you will loose, and thats no good on the street.

the setup that i'm running at the moment was originally off a mates inj 351c, and that thing was definetly no slouch. i beleive that you could probley get better divability from the t3's with a 75mm. 82mm would be the biggest i would go for your setup.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

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post #6 of 16 (permalink) Old 06-26-04, 11:43 PM
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Re: Throttle body

Woah 90mm that's huge! I can't fathom ANY windsor engine that would need one that big. How big are V8 Supercar T/B's?

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post #7 of 16 (permalink) Old 06-26-04, 11:46 PM Thread Starter
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Re: Throttle body

Yes, my engine too is built for 7000k+(scat forged crank,scat "h" beams,srp forged pistons and so on....) but my cam is only good for 6500(comp cams specs).........So the question remains.....????
The trickflow site says"R" manifold......

Large Cross-Section
with 12.2 in. Runner 2,500 to 7,250 rpm 75 mm 2.0 in. x 1.2 in. 2.38 in. x 1.38 in. 11.0 in. Black Powdercoated
Upper
TFS-51500005 Large Cross-Section
with 12.2 in. Runner 3,000 to 7,750 rpm 90 mm 2.0 in. x 1.2 in. 2.38 in. x 1.38 in. 11.0 in. Silver Powdercoated
Upper
With the extra 40 odd cubes that should bring the power range down a little(about 500rpm)

The question still remains????

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post #8 of 16 (permalink) Old 06-26-04, 11:59 PM
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Re: Throttle body

a 90mm t/b is designed more for 351w strokers, no 302 would make use of a t/b that size. as far as manifolds are concerend the r series would be the ideal manifold for you, just get on without the egr port as you wont be required to run an egr

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
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post #9 of 16 (permalink) Old 06-27-04, 01:09 AM Thread Starter
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Re: Throttle body

"no 302 would make use of a t/b that size".....I dont have a 302.???

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post #10 of 16 (permalink) Old 06-27-04, 01:14 AM
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Re: Throttle body

if you read the star of the post it said that the 90mm was designed more for 351w strokers, you could get away with using a 90mm on a 347 if you were to s/c it but otherwise dont go anywhere near that size.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
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