Anyone else not notice much MPH gain with headers?
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Launching!
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From: Rochester Michigan
Anyone else not notice much MPH gain with headers? I only gained about 1 mph with SLP headers and Y pipe wcats on another car. Anyone else have the same thing happen, or better gains?
The et went down 2 tengths though.
The et went down 2 tengths though.
Thread Starter
Launching!
iTrader: (2)
Joined: Sep 2005
Posts: 210
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From: Rochester Michigan
Similar conditions when I went.
Car was an A4 02 z28 (3.23 rear)
went 13.28 @106 stock w/lid
went 12.98 @110 catback
went 12.73 @111.xx headers
went 12.52 @111 on nittos.
Put down 323/320 on the dyno...although those seem real low. Maybe it was the tune.
Im gonna try and find a very mild cam and retune the car that way.
Car was an A4 02 z28 (3.23 rear)
went 13.28 @106 stock w/lid
went 12.98 @110 catback
went 12.73 @111.xx headers
went 12.52 @111 on nittos.
Put down 323/320 on the dyno...although those seem real low. Maybe it was the tune.
Im gonna try and find a very mild cam and retune the car that way.
TECH Resident
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From: Tree-Hugging, Bug eating CALI'
I' ve gone 107 with a 'verter, with a good tune. I have dynod 20 more RWHP, with LTs and a stall ( locked ), than with MACs and a stock verter. I would expect you should gain a good 2-3 tenths, and a a MHP or two, if you could hook up. With my stall and LTs, I can' t floor it until after the 60' on stock tires.
I suggest a tune, and I' m sure you will find some good gains
I suggest a tune, and I' m sure you will find some good gains
Originally Posted by krexken
Don't forget about air quality when you made those passes. Weather alone can make several tenths/mph difference.
There's more to weather than Temperture. Namely air pressure or Baro. If you don't track the weather closely, you can see drastically different results on a naturally aspirated car.
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TECH Fanatic
Joined: Oct 2005
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From: olympia, wash
Originally Posted by ConfusedGarage
Similar conditions when I went.
Car was an A4 02 z28 (3.23 rear)
went 13.28 @106 stock w/lid
went 12.98 @110 catback
went 12.73 @111.xx headers
went 12.52 @111 on nittos.
Put down 323/320 on the dyno...although those seem real low. Maybe it was the tune.
Im gonna try and find a very mild cam and retune the car that way.
Car was an A4 02 z28 (3.23 rear)
went 13.28 @106 stock w/lid
went 12.98 @110 catback
went 12.73 @111.xx headers
went 12.52 @111 on nittos.
Put down 323/320 on the dyno...although those seem real low. Maybe it was the tune.
Im gonna try and find a very mild cam and retune the car that way.
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Originally Posted by ConfusedGarage
The et went down 2 tengths though.
With headers and my duals, I usually saw a pickup of around 30 rwhp on average. Over stock manifolds and stock Y.
