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04-06-2004, 03:31 PM
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#1
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lower intake porting question
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Mustang Freak
Join Date: Jun 2003
City: Davenport, IA
State: Iowa
Posts: 473
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When porting out the short runners on a 99+ lower intake, should you strive for the same diameter througout, or more of a funnel shape?
I have some lower intakes that weren't gasket matched because I didn't have ported heads when I got the intakes, but now I'm getting heads and I wanted to port the lowers to match.
Suggestions anyone?
Thanks.
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T-loc, Custom CAI, Half-shafted throttle body, Steeda Quick Release Clutch Quadrant w/ Firewall adjuster and adjustable clutch cable, ASP-underdrive pulley, GT rear swaybar, GT Quad Shocks, Full MM Coilover conversion w/ "aggressive springs," 17" Grey Torque Thrust wheels, FMS Aluminum driveshaft & Tri-Ax Shorthrow shifter. SSM ported intakes and a FLEX 1/2 spacer, RPM ported heads and a 207 cam. SCT chip. 
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04-06-2004, 08:25 PM
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#2
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Registered User
Join Date: Mar 2004
City: Downey, CA
Posts: 82
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I'm not 100% sure but I would think you would want a nice even porting all the way through. Just gasket match everything.
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1999 4r70w 3.8L V6
1/8 mile: 8.9 @ 80 mph
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04-06-2004, 09:35 PM
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#3
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Registered User
Join Date: Aug 2003
Posts: 984
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you want to port match the lower to the heads, not gasket match.
As for the top of the lower...you should match that to your upper as well, might as well gasket match both.
it ends up more of a tapered effect on the long runners and gasket matched on the short ones.
__________________
1998 Subaru Legacy L Sedan
New Hottness 
1999 V6 5-speed
14.6 @ 95 w/ 2.22 60'
Wrecked 
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04-07-2004, 10:37 AM
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#4
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Mustang Freak
Join Date: Jun 2003
City: Davenport, IA
State: Iowa
Posts: 473
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The upper, and the top of the lower (I think) are already gasket matched, so all I have to worry about is matching the size of the head port to the lower intake port.
Thanks
__________________
T-loc, Custom CAI, Half-shafted throttle body, Steeda Quick Release Clutch Quadrant w/ Firewall adjuster and adjustable clutch cable, ASP-underdrive pulley, GT rear swaybar, GT Quad Shocks, Full MM Coilover conversion w/ "aggressive springs," 17" Grey Torque Thrust wheels, FMS Aluminum driveshaft & Tri-Ax Shorthrow shifter. SSM ported intakes and a FLEX 1/2 spacer, RPM ported heads and a 207 cam. SCT chip.
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04-07-2004, 11:20 AM
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#5
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God
Join Date: Jun 2003
City: DFW, TX
Posts: 3,189
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keep it round and not tapered.
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**I have sigs turned off, so if you're asking for advice based on your mods, I can't see them**
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