JM0523

So ive been reading on here that a decent amount of people are porting and polishing thier stock LS1 throttle bodies, i was just wondering how this is being done, is everyone going to a machine shop and getting it done or is there a way to do it at home, i called my local machine shops and they really dont now what im asking for, they wanted sizes and tolerances and all this other stuff.

lemons12

iTrader: (71)

There are numerous sponsors that do this on the site... There is a guy on ebay (also a member here) that does them. If you want him, search for "ported ls1 throttle body" and look for the one with the chick with big **** behind it. He does quality work.
If you want a sponsor, check the links... ------->

NastyNate65

I am also planning on doing this in the summer, but I am going to do it myself. Is there a write-up somewhere on here to show the best way to do it? My friend P&P his throttle body on his 90 Supra Turbo and said it was pretty easy. Is that the case with these?

samson_420

iTrader: (1)

I did mine myself. . . . I think the gains are minimal even if it is done by a pro. . . .


I bigger one would be nice matched with a intake that has a larger throttle inlet.

JM0523

So exactly how large can you make the stock tb in mm, i see that most ppl run 85mm, can you port the stock tb to that size?

lemons12

iTrader: (71)

Ported TB is good for around 5-10Rwhp and quicker response on average. All cars will vary of course though.

basballny2

iTrader: (1)

10 rwhp? findthat hard to believe, most get ported to 85mm and stock is 78 mm if im not mistaken.........

05GTO6SPEED

iTrader: (3)

i ported mine and the response feels better and maybe a slight Seat of the pants increase

MonmouthCtyLS7

iTrader: (6)

A few guys here do it pretty cheap, plus u have ebay...or DIY.

TheBlueKnight

iTrader: (4)

"damian" or "thesilverghost" are the two members I know of that do it. They are both well respected for their work. I had mine done from them. I'm a doit yourselfer guy, dropped my tranny, changed my suspension by myself, for the minimal price you pay ($65) I think it's worth it to send it out and have it done professionally. And the norm is 5-7hp, not 10hp.

lemons12

iTrader: (71)

That is why I said 5-10... Happy dynos are not uncommon. I would expect no more than 5 myself.

TheBlueKnight

iTrader: (4)

Agreed

udienow

iTrader: (18)

You guys really think a P&P stock TB adds 5+rwhp...?

TheBlueKnight

iTrader: (4)

See for yourself...

http://www.streetfire.net/video/ls1-...ing_643805.htm

udienow

iTrader: (18)

Hmm maybe, but there's too many other factors that could be driving those results. Human error and inconsistency comes into play too. But with that said I will also say I have a decreened MAF and a P&P TB... lol

TheBlueKnight

iTrader: (4)

There's also countless dyno's showing these average gains from P&P TB's. As well as the stock MAF flowing about 805 cfm while descreened the MAF will flow well over 1000 cfm. But it doesn't really matter either way to me. If you want to, do it, if not, don't. I just present data, take from it what you will.

NastyNate65

What tools did you use, how did you do it and how long did it take you?

bortous

Hi guys. I have an ls2 V8 and im doing the following mods.
l92 heads, headwork 11:5.1 compression,fast 102mm manifold, 3000rpm high stall converter, big camshaft, 229/242 114LSA,
Im port matching my stock throttle body and also port matching the FAST manifold.
I expect some serious power and performance after these mods.
What do you guys think?

JM0523

I would search all the threads they will give you a good idea of what gains to expect.
It should make some pretty good power i would think.

shadowdaze

is it worth getting a stock throttle body P&P or just buying a bigger one?