Thread: Head Porting?????

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  1. #1 Head Porting????? 
    GTP Level Member lambokit's Avatar
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    This may be a really dumb question. But I'm going to ask it anyway. I saw a porting job started by Swiff. He ported the center exhaust port and eveyone said he ruined the head because it flows better with the smaller "D" shape. But doesn't the volumetric efficiency go up opening up the exhaust port even if the flow goes down??? Since putting a set of Oval headers gives more horsepower, wouldn't opening the exhaust ports up to match the oval headers give even more volumetric efficiency even if the flow goes down??? Less backpressure!!! More Power??? Again I don't know this is why I'm asking...
    Last edited by lambokit; 11-14-2009 at 01:08 AM. Reason: oops, spelling.
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  2. #2 Re: Head Porting????? 
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    The "D" shape helps with reverse exhaust pulses. If you open it up to match the gasket in a circle, you have just taken this feature out and while it might flow a tad more, it is negated by the fact that you are putting exhaust gases back into the cylinder before the exhaust valve closes. Kinda like an egr but unwanted lol.
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  3. #3 Re: Head Porting????? 
    GTP Level Member lambokit's Avatar
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    Wow, that was fast. Thanks for the info. I have a friend with a race shop and a flow test machine. That's why I didn't under stand that it was ruining the head. It would have to get better flow. BUT yes it would remove all exhaust pulses. Thanks again. By the way your powder coating looks awesome. Did I read that you polish S/C cases???
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  4. #4 Re: Head Porting????? 
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    Thanks, and no i dont polish i have attempted and its just not cost/time effective. I think with the right powder it looks just as good if not better, IMO.
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  5. #5 Re: Head Porting????? 
    Bastard Reptile's Avatar
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    Quote Originally Posted by lambokit View Post
    Did I read that you polish S/C cases???
    That would be me.
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  6. #6 Re: Head Porting????? 
    The Blue One blueguy's Avatar
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    Or nicksilvergt99

    LMAO!
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  7. #7 Re: Head Porting????? 
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    Quote Originally Posted by bluegtp91 View Post
    Or nicksilvergt99

    LMAO!
    LMFAO!

    Yeah right, "OMG I"M TOTALLY A PRO AND WORTH YOUR MONEY NOW SEND IT MAH WAI"
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  8. #8 Re: Head Porting????? 
    GTP Level Member 2000GTP's Avatar
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    Quote Originally Posted by Reptile View Post
    That would be me.
    yeah, you will here from me after i do my methanol injection setup build. and transmission from 3EP. that wont be for a year or so though unfortunately....
    2000 GP GTP Black 2 Door AEM Meth Injection (100% Meth), 3.25" pulley, N* TB, PRJ Wires, Smoothflow Idlers, 42# injectors, Racetronix fuel pump, ZZP Headers, 1.8 Roller Rockers, Custom CAI, NGK TR6 Plugs, 180* Tstat, Custom Tuning by TUNE TIME PERFORMANCE
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