Porting Stock Plenum and TB

97GT4.6 · December 30th, 2008, 12:27 AM

So I have an extra throttle body and plenum.... and a machine shop at my school...

Would porting them make any big difference? Are there any websites that can show me how to do this? Or the specs that it can be made to?

Thanks

SWEET2KSTANG · December 30th, 2008, 09:00 AM

there are gains to be had porting them. i ran a ported plenum and t/b for a while. if done correctly, they will flow competively with an aftermarket set up.

Eagle2000GT · December 30th, 2008, 10:46 AM

Don't enlarge the area around the butterfly valve. If you do you won't be able to cut off the air flow to the motor and could end up with a 2000 rpm idle.

SWEET2KSTANG · December 31st, 2008, 09:57 AM

i can sell ya a ported set up if you would like.

97S281 · January 1st, 2009, 04:47 PM

Originally Posted by Eagle2000GT

Don't enlarge the area around the butterfly valve. If you do you won't be able to cut off the air flow to the motor and could end up with a 2000 rpm idle.

+1 ,

I had this problem with a setup I bought off ebay.

r3dn3ck · January 4th, 2009, 01:50 PM

i port them now and then. It's less about material removal than it is about building up the floor on the short side turn of the plenum with some epoxy. I use a sanding wheel and a drill to enlarge the throat. Don't bother porting the TB... it's easy as hell to mess it up and you'll get nothing for it. It's better to get a 70mm or 75 (if supercharged) TB and bolt it up to a properly ported plenum.

SWEET2KSTANG · January 4th, 2009, 07:29 PM

its easy to port the t/b, hard to mess up if you are paying attention. usually on a mild car the ported t/b does nothing, i have done one on an tuned bolt on auto with damn good results.

December 30th, 2008, 12:27 AM	#1
97GT4.6 Hardcore Enthusiast 97 GT 14.2@99.8 @ 4800 ft Join Date: Oct 2007 Location: Fort Collins and Pueblo, Colorado Posts: 2,347 iTrader: 1 reviews	Porting Stock Plenum and TB So I have an extra throttle body and plenum.... and a machine shop at my school... Would porting them make any big difference? Are there any websites that can show me how to do this? Or the specs that it can be made to? Thanks __________________ Cammed 2v Built By MustangMatt More mods than times your daughter has slept around

December 30th, 2008, 09:00 AM	#2
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,430 iTrader: 8 reviews	there are gains to be had porting them. i ran a ported plenum and t/b for a while. if done correctly, they will flow competively with an aftermarket set up. __________________ project warhorse under construction being built by MP2 Performance

December 30th, 2008, 10:46 AM	#3
Eagle2000GT MM Fanatic 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 4,732 iTrader: 1 reviews	Don't enlarge the area around the butterfly valve. If you do you won't be able to cut off the air flow to the motor and could end up with a 2000 rpm idle. __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

December 31st, 2008, 09:57 AM	#4
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,430 iTrader: 8 reviews	i can sell ya a ported set up if you would like. __________________ project warhorse under construction being built by MP2 Performance

January 4th, 2009, 07:29 PM	#7
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,430 iTrader: 8 reviews	its easy to port the t/b, hard to mess up if you are paying attention. usually on a mild car the ported t/b does nothing, i have done one on an tuned bolt on auto with damn good results. __________________ project warhorse under construction being built by MP2 Performance

January 4th, 2009, 01:50 PM	#6
r3dn3ck Regular Join Date: Aug 2007 Posts: 302 iTrader: 0 reviews	i port them now and then. It's less about material removal than it is about building up the floor on the short side turn of the plenum with some epoxy. I use a sanding wheel and a drill to enlarge the throat. Don't bother porting the TB... it's easy as hell to mess it up and you'll get nothing for it. It's better to get a 70mm or 75 (if supercharged) TB and bolt it up to a properly ported plenum.

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