Looking to better my MPG. Someone told me about a throttle body spacer. I asked around and so far its 50/50 on weither is good or garbage. So what do you guys think?? should i just keep my 50 bucks or buy it.

 

I've heard they work good with a bored tb. Will be getting mine bored and adding a spacer in the near future. Not sure if it will increase mpg, but it should increase power a bit.

 

They work the best on carburated vehicles. On Fuel injected engines they really dont do much at all. you will maybe see a 1-3 hp gain. Maybe. Id save your money and get something else with it.

 

If you think about it putting a spacer is only going to let the "air" drop faster (how could that possibly give you HP?) now boring it (TB) will increase the air/fuel mixture giving a few HP..that's just from my experience from doing mine...Tj

 

Throttle Body spacers do nothing for fuel injected vehicles. Although ive heard they make a pretty cool whistle sound...

 

I don't have one but I have always heard that it does nothing, and is a waste of money

 

I think you should spend an extra 5 and let me bore your throttle body

 

This topic comes up all the time
Some get gains some get noise
Out of the 3 I know that have been done (including mine) all of them had gains in some way

I got better throttle response - '94 XJ
My brother got 2 or 3 MPG - '97 XJ
My dad got more power - '96 Wrangler

We all have ram air filters and exhaust systems that are illegal is the US but fine in New Zealand

From what Ive heard injectors will be money better spent

 

They make a noise on a 4.0, that is all