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 Too slow- no traction. Join Date: Oct 2007 Location: Fort Collins and Pueblo, Colorado Posts: 2,249	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 http://www.moddedmustangs.com/forums...-burnouts.html

December 30th, 2008, 09:00 AM	#2
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 9,472	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. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction being built by MP2 Performance

December 30th, 2008, 10:46 AM	#3
Eagle2000GT Hardcore Enthusiast 2000 Mustang GT Join Date: Aug 2007 Location: Shelbyville, Indiana Posts: 1,400	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. __________________ latest tune: 370 rwhp/377 rwtq Garage: http://www.moddedmustangs.com/forums...-member-11329/ Previously Owned: 1966 Coronet 500, 426 ci est. 290-300 rwhp 1969 Camaro RS/SS, 350 ci est. 210-220 rwhp Today is the real muscle car era.

December 31st, 2008, 09:57 AM	#4
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 9,472	i can sell ya a ported set up if you would like. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! 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 Join Date: Oct 2006 Location: N.W. AR Posts: 9,472	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. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction being built by MP2 Performance

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January 4th, 2009, 01:50 PM	#6
r3dn3ck Regular Join Date: Aug 2007 Posts: 191	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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