Throttle Body Question 65 vs 70

A 65 or 70mm will flow plenty for any engine modifications you do, unless you go boost where air can actually be 'forced' beyond the limits of an aftermarket throttle body under normal engine vacuum.

You will need to port your stock intake opening a bit to match either throttle body. Turbulence would be caused if air hits a wall (unported) and just isn't very good at helping power out.

If you look at intakes anyways, they neck down to much less than the throttle body size anyways. It starts just a few inches in

AnthonyR23 said:

Hi, I am having problems with my throttle position sensor.. I think it could be faulty.. but I don't really want to purchase a sensor for almost 50 us if I could just spend the extra and upgrade to a new throttle body.. problem is I still have speed density but do plan on upgrading to mass air.. and I have read that 65mm is better for stock.. and 70 good is better for modified intake.... so what if I do plan on doing that in the future.. is it ok to go with the 70mm intake with a stock...????

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I thought that aftermarket throttle body's re-use your stock TPS. If that's the case, you'll still need a new TPS.

It's been a while since I've bought an aftermarket throttle body and I don't remember for sure, I'm sure someone here knows.

Jeff