Throttle Body Size.

[Mike10secv6]

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[John Wilde]

That depends on how much air you need to go through the motor.
A 70mm may work great on a stage 1 headed, 74 turboed car.
The 90mm will pick up with the 88mm and larger turbos especially with stage 2 heads. A friend of mine has a single turbo stage two being finished at duttweiler's right now. He has a 105mm TB. It should make huge HP :anbet:

[John Wilde]

The Lee Intakes are really old.
I am sure that it will work well but you would pick up with a larger tb on it.
10 plus years ago Duttweiler did a Dyno session for Turbo magazine
testing the kenne bell stuff.
The guys from champion heads put a 90mm on their car with a little fab work.

At one point a te-44 was a big turbo for street car.
Now people run 67 to 74mm compressors all the time.
Same thing on injectors!

[John Wilde]

Mike,

If you are going for under 1100hp I would not lose any sleep over it.
I know kenny has just dynoed a motor with a stock typpe intake that made 1180ish HP. If you are trying to set the world on fire 1400plus dont bother with the smaller 65/70MM stuff,

BTW Cal Hartline went 8.57 @159 with a 70mm TB.
If you goals are around that or a little slower dont worry.
Then again Harry wanted me to have 4 inch pipes on my v-6 with a 88mm turbo.