Stock Throttle Body Mod

MikesRammin · Sep 24, 2011

I've read on here about people who take the throttle body off and cut off the air horns and such for much better performance. Now has anybody on here done that? What do you think of it do you have better performance? how does it effect your mileage? Now can somebody tell me step by step what needs to be done? Pictures? Hopefully we can get a post on how to do it with pictures then have it locked to the top of the thread page. Thanks in advance guys.

nim81 · Sep 24, 2011

ive heard of people cutting them off but i dont remember them being on the TB on my 02' 5.9, but i do remember them on my durango's 5.2 and my 96' 5.9. I would think it wouldnt be too hard using a good dremel

MikesRammin · Sep 24, 2011

See I've got a dremel and proabably all the tools to do it. I just don't know what all to do on it. I'm afraid to do it right now because I never deal with fuel injection I've always delt with carbs.

nim81 · Sep 24, 2011

well the 5.9 is multi port injection and no fuel goes through the TB. just air.

you want to grind the wings off and make it look like this, just take your time and be careful.

also on the older intake manifolds you can cut down the intake runners and a "separator plate" thing in there for better air flow. on the newer 5.9L's dodge made them without the separator plate.

quietpeen · Sep 24, 2011

good info Nim....MikesRammin.....if you give this a shot take pics and it could be turned into a how to for others. Others might chime in that know about this.

wermbang · Sep 25, 2011

I plan on doing this sometime, and also modifyling my kegger.

Before

After

nim81 · Sep 25, 2011

looks good werm... did you notice a difference?

wermbang · Sep 26, 2011

Those are just pics of the net. I plan on buying kegger and throttle body sometime, just seen one at a swap meet for $50 for the pair but didnt have the money, and will do it. I have read it helps out the idle.

nim81 · Sep 26, 2011

If you get lucky you can find one of the newer keggers that doesn't have the separator. Do you plan on cutting down the intake runners too?

Sent from iPhone-taptalk

wermbang · Sep 26, 2011

Yeah. On the 98 (could be 99 also) and newer I believe they do not have the center divider in the kegger. There is a DIY in the 2nd gen section I will be using.
Kegger Mod

nim81 · Sep 26, 2011

wermbang said:
Yeah. On the 98 (could be 99 also) and newer I believe they do not have the center divider in the kegger. There is a DIY in the 2nd gen section I will be using.
Kegger Mod

divider!!! thank you!!! i couldnt think of that work for nuthin'!! lol

looks like a good write up there

MikesRammin · Sep 26, 2011

Can I put a 98 5.2 intake on this truck? What all from the 5.9 can swap over to a 5.2? Shouldn't the on differance on the engines in general be bore and stroke?

nim81 · Sep 26, 2011

i know one is internally balanced while the other is externally balanced, but not sure which one is which.

wermbang · Sep 26, 2011

I want to say they are the same, but not a 100% on that.

03Ram · Jan 20, 2012

Well after reading multiple forums on doing this I decided to give it a shot and boy am I disapointed. I noticed a slight increase in throttle response and thats about it not a lot of HP gain which I didnt expect to get a lot to begin with. The BIGGEST problem with this is it completely fu*ked my MPG. I dont get near the gas mileage that I used to. Before on flat road and no wind going 65 it wasnt surprising to see 16 to even 19MPG depending on the day. Now going 65 on the same roads it will not go over 13MPG which 65 being the sweet spot on fuel mileage you would expect it to be getting better than 13 even if its the gas guzzling 5.9 magnum. Going 75 I get 10MPG which is about where it was before but usually was in the high 11's. Not really sure how making the air go into the motor a little better could have screwed it up that bad. To say the least I reccomend wasting your time on something else. Even though everyone else that has done it seemed to get good results. Not sure why mine didnt.

Okiespaniel · Jan 20, 2012

I did this mod about 5 years ago....did not knock out the hour glass but polished the throats.
I noticed a good butt dyno increase in the midrange and upper end.
My original TB is awaiting me. It will be cut but I need to build a jig and get the proper tooling.

"03 ram...not sure why you had an issue. Do you have a vacumn leak.? Did you polish and radius your inlets to the throats? Remeber if you are feeding more air your PCM will increase your injector dwell (more fuel) to maintain its preset A/f ratio. That should give you a good power boost though.
BTW, you don't have any cracked vacumn hoses and your MAP sensor is good, right? I removed it before you did the work and made sure all the lines were blown clean

the codes · Jan 22, 2012

bought a throttle body that was bored out and air horns shaved, etc. love it, night and day difference.

Sent from my iPhone using Tapatalk

03Ram · Jan 23, 2012

Well thanks for the info "okiespaniel". I will certainly take a look into this and figure something out. I am aware of the computer needing to add more fuel to keep the a/f mapping where it needs to be but do you really think it would be adding that much more fuel to be getting 3mpg less? Didnt really think it would but who knows.

Okiespaniel · Jan 23, 2012

03Ram said:
Well thanks for the info "okiespaniel". I will certainly take a look into this and figure something out. I am aware of the computer needing to add more fuel to keep the a/f mapping where it needs to be but do you really think it would be adding that much more fuel to be getting 3mpg less? Didnt really think it would but who knows.

I agree with you. It should not have cost you mileage. But your mileage loss points to another symptom which has happened during or after you modded your TB. Yeah I know...duh.

If your MAP sensor was damaged during your mod or the elbow vacumn hose was plugged or damaged by debris that will kill your mileage.

If you can determine your issue or resolutioon please post up.

03Ram · Jan 26, 2012

Okiespaniel said:
I agree with you. It should not have cost you mileage. But your mileage loss points to another symptom which has happened during or after you modded your TB. Yeah I know...duh.

If your MAP sensor was damaged during your mod or the elbow vacumn hose was plugged or damaged by debris that will kill your mileage.

If you can determine your issue or resolutioon please post up.

Well I went through everything..cleaned out the vacuum hoses. Shaved a little more off the inlets to the ports. Sanded for literally a few hours and polished with "Mothers Mag & Aluminum Polish" to make it just ridiculously smooth and rounded. Did find some air leaks that I never even noticed before which I will post pics of on the next post, and still no luck. So I can only assume it is the sensor now. But wouldnt my Engine Check light be on?

Stock Throttle Body Mod

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Junior Member

Attachments

Senior Member

Senior Member

Junior Member

Senior Member

Junior Member

Similar threads

Forum statistics

Share this page