advice on porting L36 throttle body

[loud95sse]

Do I take out the whole T. Any other grinding need to be done before polishing other than removeing the T. I'm going to try this and I'm not a pro or anything, so any advice will help. I think I will be OK, if it's as easy as it looks.

I figure I can save 150-$200 to try this myself, then i can spend that $$ on a mod I can't do(maybe rockers or PLOG+PCM). Is doing this going to be as good as a ZZP TB.

Try this for now ,if I succeed, maybe LIM later.

[its840]

not doubting your abilities at all by any means.. but i would suggest doing an exchange for an expertly done one. less headache and you know its done right.. and you also dont have to risk messing it up..

just my 2 cents..

but if you have a few laying around.. by all means give it a try..

[loud95sse]

Pretty much just like this shows right. This was for L67, but I get it.smooth out the edges left from cutting out the T, then buff. Am I missing anything?
http://www.clubgm.com/?name=98tbporting

[95naSTA]

You should start off with a L67 TB first IMO to get the larger TB bore.

Here is what I did to mine.

Keep in mind you're going to have to tune upon install since the MAF will be reading the incoming air differently.

gmtuners.com can do that for you.

[willwren]

I agree you're starting with the wrong TB. I've ported a couple by that method and I can tell you that you'll likely run into MAF calibration issues. Besides, the post isn't as much of a restriction as you might think. The primary restriction is the throttle plate/bore.

This is also somewhat of a case of putting the cart before the horse. Without valvetrain mods to increase flow, this isn't going to net you what you think it might.

[loud95sse]

so it may be a waste of time to mess with l36 TB. the L67 seems like a lot more work. I don't have a lot of money and I was hopeing to do A free mod here.

[willwren]

You're just not going to get what you want out of it without tuning and supporting mods. I'd say put this on the back burner for awhile, then you can source a spare to begin working on. It'll be ready when you and your car are.

[Allmachtige]

I don't want to hijack this thread, but would I benefit from a bored TB? I always considered it a mod not worth the investment so I never put much thought into it.

[loud95sse]

You are right, I will wait untill I have my pcm tuned. In the meantime I will get a used one and work on it. Does the zzp TB have a larger butterfly than the stock. I notice it says bored from 65mm to 68mm. That is probably achieved by using sand paper around the entire inside.

Here is one on porting the l36 TB once I do do it.http://www.mainstreamtopics.com/forums/ ... topic=3313

I sure wish I could afford rockers.

[willwren]

I can assure you that nobody modifies TB's with sandpaper.