Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: Pookapotamus on October 05, 2009, 05:31:13 PM

Title: bored trottle body
Post by: Pookapotamus on October 05, 2009, 05:31:13 PM: i have read a recent post on another site about boring your stock trottle body out to a 62 mm. my uncle has a big shop with all the tools and i was a machinist for a couple of years and dont think this is beyond my abilities at all. but i was wondering has any body else done this on here or am i being a pioneer? in the article that i read they used a drill press to bore it out but my uncle has a lathe and a mill so i would probly use them.

any advice would be greatly appreciated also what are your critiques?
Title: Re: bored trottle body
Post by: esi on October 05, 2009, 11:38:52 PM: I thought some throttle bodies had a little cone to them to give them a venturi effect and speed up the air going in. But I could be full of turds too. If you're going to do it use the lathe.
Title: Re: bored trottle body
Post by: tubby on October 05, 2009, 11:56:38 PM: It's not really worth the effort on a stock engine Dana. Invest money and time elsewhere. Marginal single-digit gains will be achieved if any at all. It would help on an engine that had other enhancements done to it ie. - CAI, spacer, header, exhaust ,chip,etc.
Title: Re: bored trottle body
Post by: Pookapotamus on October 06, 2009, 05:59:47 AM: i have the new style intake which i am cleaning up right now to install at the same time as i bore the throttle body out and with the mill i can make a spacer for it as well, but will the spacer even help when i go to the bigger intake?
Title: Re: bored trottle body
Post by: BlackYJ on October 06, 2009, 07:35:47 AM: Quote from: Pookapotamus on October 06, 2009, 05:59:47 AM
i have the new style intake which i am cleaning up right now to install at the same time as i bore the throttle body out and with the mill i can make a spacer for it as well, but will the spacer even help when i go to the bigger intake?

Spacers don't really have any effect on a MPI engine except for improved throttle response. As stated above not worth the effort or money. I have one on my Jeep and no really change. Now caburated and TBI engines are a different story
Title: Re: bored trottle body
Post by: Pookapotamus on October 06, 2009, 07:54:40 AM: thats kinda what i thought about spacers.
Title: Re: bored trottle body
Post by: tubby on October 06, 2009, 04:13:14 PM: Why don't you buy an aftermarket header while you're at it? Intake is coming off , and now would be a good time to do it. Stock manifold usually cracks anyway. Kill two birds...
Title: Re: bored trottle body
Post by: Immortal on October 06, 2009, 06:20:12 PM: or a turbo, or super-charger....

it's a frickin' JEEP!!!!
Title: Re: bored trottle body
Post by: Pookapotamus on October 06, 2009, 07:09:57 PM: my header is cracked but i do have a replace ment one thats been fixed.

@ immortal, you be quiet badger boy!
Title: Re: bored trottle body
Post by: Immortal on October 06, 2009, 09:28:41 PM: Did someone say something? I can't hear lowriders too well from up here.

Don't worry buddy.... I'll find you a nice Tuner Forum to hangout on....
Title: Re: bored trottle body
Post by: Pookapotamus on October 06, 2009, 09:45:40 PM: ooo ouch!
Title: Re: bored trottle body
Post by: hps4evr on October 07, 2009, 05:48:30 PM: so, if you bore throttle body out to 62mm, what do you plan on using as a butterfly? im thinkin you might have a gap to fill. use trevors brain. it should just fit... ;)
Title: Re: bored trottle body
Post by: Pookapotamus on October 07, 2009, 08:13:16 PM: actually the artical that i read says that there is a narrowing part below the butterfly that can be bored out to 62mm i think that the butterfly is already at 62mm you just have to remove the restriction that brings it down to 52mm. i need to reread the article and se if i really want to do this.
Title: Re: bored trottle body
Post by: Immortal on October 07, 2009, 09:31:43 PM: Quote from: hps4evr on October 07, 2009, 05:48:30 PM
so, if you bore throttle body out to 62mm, what do you plan on using as a butterfly? im thinkin you might have a gap to fill. use trevors brain. it should just fit... ;)

No it wouldn't... there would be enough of a gap you could fit your pecker through... asshat. ;)
Title: Re: bored trottle body
Post by: hps4evr on October 07, 2009, 09:44:38 PM: okey doke. it may just be the bottom half. post up the results. trevor... this language you use, i dont get?