Larger throttle body for 04+??

**mycaddy97** · 03-17-2015

Im sure this has been asked a thousand times, but is there any alternative for a larger throttle body for the 04+ GTP cars? or is there a substitute? Or has anyone converted to cable? Thanks guys for the help, I sold my 97 GTP, kinda wishing I hadnt!! LOL

**REDCRAPGP** · 03-17-2015

No need, doubt your out flowing it

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**Fivefingerdeathpunch** · 03-17-2015

What he said.

Also you couldnt really change it if you wanted, there really is no way to tune for it with these computers. You couldnt ever switch to a cable TB either, everything is electrical these days and everything talks to each other.

**Travisgt2** · 03-17-2015

What they have all said. And I've looked for my own car came up with bupkiss

**blueguy** · 03-18-2015

Why do you think you need one, that's my question.

**Overkill** · 03-19-2015

I hope to have something to talk about soon. I imagine it'll be worthwhile on cammed vehicles the most. The stock TB blade isnt a bad size but the housing is pretty crap.

**Turbocharged400sbc** · 03-19-2015

i was ****ing with a 3800 TAC and the earlier GM 90mm DBW TB. the motor controls and the sensor trace outputs are the same, the problem is then that you have to find a place to put a hacked TAC module and just run the pigtails to the vette tb.

a 90mm tb was marginal on a 2300ax with a 3"....probably not a huge gain by any means for a tiny m90

on a side note im finally starting to see the PPS glitching out on my 04....getting worse by **** hairs at a time...

rpm dropout when letting off as you go below 9%.

im gonna call it where instead of tb mounted tps' like the good old days....youll start seeing replacement of the PPS and DBW TB's as they all experience wear in the most traveled area's of the carbon track.

awesome progress....

**mycaddy97** · 03-23-2015

thanks guys, I appreciate all the help, I know I wouldnt be out flowing it, just thinking about future upgrades, does anyone know the stock size?? I should know I guess...

**blueguy** · 03-26-2015

I thought they were 65mm, and the LS4 is 10mm larger than that if I remember right.

It is also drive by wire, but you'd have to figure out pin outs to make it work, if it even would.

Plenty of LS4 guys run LS2 throttle bodies and change the pinouts after manifold swaps.