Hi everyone. I've got a 2005, 5 speed, 2 door, 4x4 Jimmy. Finally getting around to doing a couple things under the hood, and I'm looking at installing one of those spacers between the intake manifold and the throttle body. Most of the ones I've seen on E bay list fitment up to 2004. To my knowledge the '04's and '05's are the same, but, worth asking the question, are they? Now having asked that, do these parts come close to fulfilling the claims made by those selling them, and if so, is there "the one to buy" ? Any information would be appreciated. Thanks.

 

They do absolutely NOTHING for a MPFI engine... Nothing at all. They only help when you have a carb or throttle body injection (Vortec CPI engines 95 and lower). Since the fuel is injected into your intake port (MPFI on 95+ models), the spacer does nothing at all the aid in mixing as they claim. When they are under a carb or TBI unit, where the fuel AND air mix actually goes through the spacer and mixes better it helps. But since only air goes through it in a multi port fuel injected engine... NOTHING is gained.

I have one on my pickup truck, and all it did was make the AirRaid intake line up better by pushing my TB forward an inch and a half. The spacer does nothing but the CAI gave me 2L/100KM economy gain, felt a little more powerful, and makes a cool whistling sound when I mash the pedal. The CAI kit was well worth the dollars.

My advice, if your cold air intake doesnt fit right, get one... Otherwise buy something usefull or put that money towards a computer tuning or cold air kit. Then you will actually benefit from it.

 

What he said!

 

Thanks to both of you. I never stopped to think I was port injected... duh!
Ohsofly, the computer tuner was a key item on my list of things to do. Any brand recommendations? I'd like something with options for economy, performance and anything in between. My buddy has a 3500 Dodgezilla and he's got one made by Edge.. your thoughts are appreciated.

 

Exactly what they said. I had body lifted my blazer and my cold air intake wouldn't fit at all. I installed the throttle body spacer to essentially raise the cold air intake up and it now fit like it was supposed to. No performance difference at all.