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Porting Throttle bodies?

I guess my main question here is a tune in need after i port them? Anyone done this? seen gains?

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Old 11-23-2013, 01:15 AM   #1 (permalink)
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Default Porting Throttle bodies?

I guess my main question here is a tune in need after i port them?

Anyone done this? seen gains?
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Old 11-24-2013, 09:38 PM   #2 (permalink)
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I plan to port mine. Bought an extra set and am going to send them to max bore. I plan to get a retune on.

Only member that got this done that I know of was Megan Z. I think he reported gains of 7-10WHP.
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Old 11-25-2013, 05:54 AM   #3 (permalink)
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Originally Posted by 370Z JT View Post
I plan to port mine. Bought an extra set and am going to send them to max bore. I plan to get a retune on.

Only member that got this done that I know of was Megan Z. I think he reported gains of 7-10WHP.
gain of 7-9whp was reported twice on a fully custom/bolt-on setup.


the TB were bored to 62.5mm,
the butterfly plate was arrow edged
half of the shaft was cut (only 1 side remained)
both screw were filed down.

you will need a bigger MAF Tube if you do this. not sure about stillen diameter. my cai was custom.
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Old 11-25-2013, 06:29 AM   #4 (permalink)
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Hmm how much does this mod run?? and will it need a tune after??
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Old 11-25-2013, 11:21 AM   #5 (permalink)
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Hmm how much does this mod run?? and will it need a tune after??
depend if you can do it yourself or not.
anything between 0-600$ for the job on the TBs and yes I would advise for a tune, ofcourse if paired with a bigger MAF Tube.
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Old 11-25-2013, 12:33 PM   #6 (permalink)
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Im running Z1 tubes with stock air boxes. Im wondering if any one can do a DIY on porting these????

7-10WHP gains seem legit to me
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Old 11-25-2013, 12:41 PM   #7 (permalink)
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Originally Posted by RyanWest View Post
Im running Z1 tubes with stock air boxes. Im wondering if any one can do a DIY on porting these????

7-10WHP gains seem legit to me
Quote:
Originally Posted by Megan370z View Post
gain of 7-9whp was reported twice on a fully custom/bolt-on setup.


the TB were bored to 62.5mm,
the butterfly plate was arrow edged
half of the shaft was cut (only 1 side remained)
both screw were filed down.

you will need a bigger MAF Tube if you do this. not sure about stillen diameter. my cai was custom.
It's not going to be 7-10whp on the setup you've got. Megan had a lot more done to the intake tract, and it needs to be tuned for the larger diameter MAF. Also, if you mess up a throttle body trying to DIY a port and polish job, expect to get fisted. Those things are not cheap.
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