Aftermarket Throttle Body Questions....

94StewFord

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I see that the stock unit is 56mm, so what would you recommend if I am going with a CAI (which CAI is best?) as well as Under-drive Pulleys and some electrical upgrades. What about injectors or anything else I am missing without getting into intake and heads? My assumptions are the 65mm is plenty or is that too much?

Thank you!
 

ttocs

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everyone LOVES to stick the 75 mm on there even though the opening for the cobra intake is only 70 mm. I would warn you not to go for the cheapest throttle body you can find because when I did and went with a pro-products tb I had the worst idle and it would rev everytime I shifted. I replaced it with an edlebrock and that went away.

Under drive pullies are good for racecars but if you spend a fair amount of time at idle I would not recommend them. It slows down the alt which leads to charging and temp issues for the alt eventually burning them out(I learned after 2 in 8 months burned out on me).

Injectors will require a tune for them to be done right so don't forget that price with them. I would not upgrade the injectors till you get into the heads/cam or boost it though as your not going to gain power from it.
 

94StewFord

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everyone LOVES to stick the 75 mm on there even though the opening for the cobra intake is only 70 mm. I would warn you not to go for the cheapest throttle body you can find because when I did and went with a pro-products tb I had the worst idle and it would rev everytime I shifted. I replaced it with an edlebrock and that went away.

Under drive pullies are good for racecars but if you spend a fair amount of time at idle I would not recommend them. It slows down the alt which leads to charging and temp issues for the alt eventually burning them out(I learned after 2 in 8 months burned out on me).

Injectors will require a tune for them to be done right so don't forget that price with them. I would not upgrade the injectors till you get into the heads/cam or boost it though as your not going to gain power from it.
Great information, thank you! I’ll stick with the 65mm
 

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