anyone do their own porting?

[GP99GT]

i bought a stock L36 throttle body from another 99 GPGT, and i wanna do some home brew porting to it. anyone done this before?

[johnjzjz]

porting anything is a tricky matter with out real hands on experence in the end you might wreck what you tryed to make better, they sell spacers with a vortex twist insert, cheep and if something goes on you dont like about it take it out, remember bigger is not always better if you screw with the ( VE ) volumetric efic ( intake verses exhaust track tuning ) it will never work right again having said that, gasket matching, smoothing of ports, ( intake ) make the port a smooth to the feel finish with polishing only the exhaust port to a mirror finish is a play, Only one motor can the intake can be polished --- ( only ) if its port injection and the injector nozzel is at the valve bowl it is called ( DOWN NOZZEL ) their is always a play and a big one but only alky sprint cars use this with high end hilborn injection type set ups --- keep what you do to a min this way you can than see a small change for the worse and stop jz

[90FormulaWS6]

dude honestly i dont think youll notice a difference porting that throttle body honestly

[rgaynor85]

ehh go for it im gonna be porting mine for my ls1 myself with a dremel, if u got a spare go for it...

[mtg6486]

im bought some ls6 heads and im smoothing out the intake and just cleaning up the exaust side

[GP99GT]

it was cheap, if i screw it up then oh well.

[Tru2Chevy]

I say just attack it little by little. See if you can get a few good pics of other ported TBs so you have something to compare too.

- Justin

[GP99GT]

yeah once i have it in my hands, im going to check out the pics on ZZP's site, and also ask for pics on ClubGP. then ill try to imitate it as best i can

[GP99GT]

Here she is...i cant believe he gave me all the sensors and stuff too! cost me like $33! the MAF sensor alone is $100

http://img206.imageshack.us/img206/7816/tb0021gv.jpg

http://img137.imageshack.us/img137/493/tb0035xx.jpg

Now i need to make it look like this...

http://img150.imageshack.us/img150/5989/22317sv.jpg

http://img150.imageshack.us/img150/2796/22329wn.jpg

[GP99GT]

http://img46.imageshack.us/img46/8682/tbclean6xi.jpg and now its clean....getting a dremel tonight, hopefully ill have most of the porting done

[GP99GT]

Done. inlet is ******, a dremel isnt the job for doing this sort of thing, but its better than stock. the outlet came out really nice after a wire wheel brushing


http://img528.imageshack.us/img528/9554/beforeafterinlet7jf.jpg

http://img367.imageshack.us/img367/8785/beforeafteroutlet0wl.jpg

[Tru2Chevy]

That looks pretty good for a first time home job. What was stopping you from getting more out of the lower portion of the inlet side?

- Justin

[Savage_Messiah]

yea now let's see if you notice ANYTHING from doing this...

[GP99GT]

Justin, i was running out of material to grind away, plus it was just extremely annoying to do. i actually went through on one spot on the left side, i had to put some epoxy over it to seal it back up...the way the maf sensor is seated, all around it the TB wall is kinda thin. i still took a decent amount off, at least 1/4 of an inch. plus its nice and clean, im sure the one im going to take off the car will be disgusting after 141k

oh and kasey, i bet i will...too bad i need tuning for it cause of the stupid MAF sensor, which means i cant put it on yet, which also means ill get a full tune at the same time, so i wont be able to tell if it made a diff

[rgaynor85]

what was wrong with the dremel when porting im curious before i go and try wth mine, post some pics of the finished product

[GP99GT]

nothing wrong with it really, just really hard to cut into that stuff. its aluminum so its fairly soft, but not soft enough for it to really rip through it. a die grinder would work much better, then use the dremel for sanding/polishing

[Savage_Messiah]

OK, I didn't realize the FWD and RWD motors were so different. Really nobody has noticed gains then they do this or even out-flowed the stock TB in their application, nobody N/A at least,but I guess the f-bodies and w-bodies are that different :?

[Teds89IROC]

looks good, I wanna pick up another plenum and runners, wanna give that a shot too? haha kidding

~Ted

[Tru2Chevy]

OK, I didn't realize the FWD and RWD motors were so different.

IIRC, heads, upper and lower intake, and TB are all different from FWD to RWD.

- Justin

[GP99GT]

IIRC, heads, upper and lower intake, and TB are all different from FWD to RWD.

- Justin

i think the heads are the same...LIM and UIM are different though, as well as the TB. the air intake is on the opposite end of the motor on a FWD (the "rear", opposite side of the belts)

[Savage_Messiah]

If the intake manis are different I guess that could account for it then. In that case, Well done! :lol:

[Tru2Chevy]

i think the heads are the same...LIM and UIM are different though, as well as the TB. the air intake is on the opposite end of the motor on a FWD (the "rear", opposite side of the belts)

Yea, I think you are right. I'm thinking about the 60* v6s where the FWD cars all got better flowing aluminum heads and the rear drive cars had iron heads.

- Justin

[GP99GT]

If the intake manis are different I guess that could account for it then. In that case, Well done! :lol:

you can tell theyre different just by looking...mine has the LS1 style plastic runners for the upper intake

[Savage_Messiah]

true dat

[rgaynor85]

well the pics look decent the back looks excellent but i think u need to smooth out the front by the maf very uneven and cant be good for flow there gt it like the examplt pic u show earlier OK, I didn't realize the FWD and RWD motors were so different. Really nobody has noticed gains then they do this or even out-flowed the stock TB in their application, nobody N/A at least,but I guess the f-bodies and w-bodies are that different

ive never heard of anyone saying this, i dunno if your refering to only v6 throttle bodies because i dont know diddly about v6 tb's but i know ls1 tb are very important thing to do and most say its about 7-12 rwhp mainly because it comes into a smaller hole than the tb blade is i believe the blade is 78mm but the hole actually comes down to about 75mm then opens up again to the blade and thats what u smooth out and stuff to use its full potential and smooth out flow, agian i dunno if u were refering to v6 applications only but if not there u go,

[GP99GT]

i just put it on there...ass dyno says yes, a little more throttle response, and definitley more noise :lol: it whistles like a turbo

btw, always check your vacuum lines kids...i left the main one to the TB off (from PCV)...sounded like i had a monster cam in it

[Teds89IROC]

i just put it on there...ass dyno says yes, a little more throttle response, and definitley more noise :lol: it whistles like a turbo

btw, always check your vacuum lines kids...i left the main one to the TB off (from PCV)...sounded like i had a monster cam in it

haha nice! I had the same leak on the iroc when I was messing around with it :lol:

~Ted

[Savage_Messiah]

well the pics look decent the back looks excellent but i think u need to smooth out the front by the maf very uneven and cant be good for flow there gt it like the examplt pic u show earlier

ive never heard of anyone saying this, i dunno if your refering to only v6 throttle bodies because i dont know diddly about v6 tb's but i know ls1 tb are very important thing to do and most say its about 7-12 rwhp mainly because it comes into a smaller hole than the tb blade is i believe the blade is 78mm but the hole actually comes down to about 75mm then opens up again to the blade and thats what u smooth out and stuff to use its full potential and smooth out flow, agian i dunno if u were refering to v6 applications only but if not there u go,

Yeah, I ws referring to the 3.8 engines. Maybe I was wrong tho... I should see.... hmmm

[r0nin89]

Justin, i was running out of material to grind away, plus it was just extremely annoying to do. i actually went through on one spot on the left side, i had to put some epoxy over it to seal it back up...the way the maf sensor is seated, all around it the TB wall is kinda thin. i still took a decent amount off, at least 1/4 of an inch. plus its nice and clean, im sure the one im going to take off the car will be disgusting after 141k

oh and kasey, i bet i will...too bad i need tuning for it cause of the stupid MAF sensor, which means i cant put it on yet, which also means ill get a full tune at the same time, so i wont be able to tell if it made a diff

Got the name of a tuning place?

[Tru2Chevy]

Matt is planning on getting a full tune done by The Tuning Doctor (foff667).

- Justin