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W
I am replacing my old Headman Headers 15yrs old with a new set Of Hooker SuperComp. My LT1 motor is a stroker 383 with Dart Alum Heads . Will I need to retune at all or dyno the car after the change? Exhaust tubes going to 13/4 dia from 15/8 on old set, these are long tube I don't know what the old ones are. New headers are ceramic coated
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Send PMHOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Good choice in headers. I have them on my 406 SBC - pretty awesome!
Are you racing the car? I don't know that dyne tuning for a header change is necessary, unless you're really trying to determine the net difference. It could actually go down a little if the velocity of exhaust gases slows down due to the increased exhaust volume. However with a 383 with good compression, you'll probably see some incremental gains.
Are you racing the car? I don't know that dyne tuning for a header change is necessary, unless you're really trying to determine the net difference. It could actually go down a little if the velocity of exhaust gases slows down due to the increased exhaust volume. However with a 383 with good compression, you'll probably see some incremental gains.
I would just adjust carb settings to get good plug readings and drive it!
Good luck!
Paul
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Paul
Thanks for taking the time to answer my question. This is my winter project, along with a few other jobs.
Wally
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in Forum: C3 HVAC, Fuel, Emissions, and Exhaust
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