A different way to port?
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Junior Member
Joined: Mar 2006
Posts: 36
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From: DFW Area
Car: 89 IROC
Engine: vortec head/ZZ4 cam/TPIed 350+.040
Transmission: 700R4
Axle/Gears: 3:27
A different way to port?
Has anyone cut out the dividing walls in the Manifold instead of the runners? Most porting of SLP like runners includes opening up the dividing walls between the runners where it bolts to the plenum. I was curious if instead someone tried to use stock runners and open up the walls in the manifold. This would allow access to the volume in 2 runners in stead of 1.
If some has, what kind of results did they get?
If some has, what kind of results did they get?
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Joined: Apr 2005
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From: CT
Car: 92 trans am clone
Engine: LO3
Transmission: 700r4
Re: A different way to port?
its been done ive seen pictures of it you just gotta search i dont remember how well or not well that it worked.
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iTrader: (3)
Joined: Sep 2003
Posts: 6,859
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: A different way to port?
Yes it has been done. I believe MadMax was the first to post about it. I believe he had some success. You might want to do a lot of research on tuned runner lengths, runner taper and cross sectional area.
Joined: Jan 2005
Posts: 10,413
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
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Joined: Sep 2007
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From: mckeesport. pa
Car: 88transam/ 86 iroc-z/ 64 corvette
Engine: ta 400ci tpi/ iroc 327 / vette 327
Transmission: ta 5 speed/ iroc 700r4/ vette m-22
Axle/Gears: ta 3:42/ iroc 3:73/ vette 4:11
Re: A different way to port?
i had a 86 iroc about 3 years ago with a 383 i cut the intake runners down to 3.5 inches long and put slp runners on it but i did not cut the divider out of the runners. it ran great it was a big gain over the old edlebrock lower and slp runners
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