michael 20

What are the options for a throttle body spacer if I have the airaid CAI installed and stock throttle body?

southcarolina12

they wont fit with the airaid. its hard enough to get it on the throttle body without a spacer.

spqr

I think spacers are a waste of money. The best explanation I have found for why the might do anything at all is that they simulate a longer intake runner which just shifts your tq band slightly lower and should lose you some top end hp. However, it is also increasing the space between the throttlebody and valves, which is just dulling responsiveness.

Think about it this way: one of the big benefits for an ITB setup is that TBs are as close as possible to the valves, so they are super responsive. Similarly, many GT guys switch to the boss intake with shorter runners so that they have more top end hp, even though it loses them a little tq in the low end.

I think you're better off saving the money for something proven like headers or intake porting.

southcarolina12

throttle body spacers did help on the old tbi engines but on the newer pfi and sfi engines it really doesnt help anything. just makes a annoying ricer whistle sound.

Fintile

Wow...so your saying there is NOTHING to be gained by having a TB spacer? You say it lowers top end HP? Is it so drastic that it would nullify all other mods? Tune, intake, exhaust?

Fintile

Nothing?

KushBandit

It doesn't do a **** thing other than that whistle lol. As you said, it helped a bit on TBI engines, but not these new ones.

Basically people, if you don't have a throttle body injected fuel system, don't buy a TBS.

RC13GT

TB spacers are an absolute paperweight. Don't buy one unless you like flushing money away.

spqr

I don't think there is anything to be gained. It might shift your tq curve down a little, but I can't say for sure. That estimate is based on a guess about how it's supposed to work, but I'm not sure if it's an accurate one. The only way to be certain is a dyno.

StangDawg

This is a moot point guys as far as the OP is concerned. Even Airaid says that the throttle body spacer won't fit with their CAI. Game over.

Fintile

I wint ever get a CAI again waste of money for a few hp and some sound