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Re: Carb Tuning with 02 sensor?
[Re: 6bblFLASH]
#1227750
05/06/12 01:00 PM
05/06/12 01:00 PM
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Joined: Aug 2003
Posts: 43,913
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,913
Bend,OR USA
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Quote:
swapped out carb for a borrowed CarbShop 950 and the problem is GONE!!!! 
With the same jetting as before it is now 11.2-5 at max throttle.
Fuel pressure is still at 5.5.
Noticable increase in power,pulls in high pretty darn good.
Odd thing is I lost 1-lb. of boost????
Went from 5.5 to 4.5?????
Less cfm.??????
Your to rich still, try going to 12.2 to 13.0 at WOT, jet down a LITTLE(one jet size on all four corners) at a time  Look at the spark plugs after each jet change, BTW what plug name and heat range are you using now? Get ready for massive tire spin,  if you don't already have it  the difference in power between 11.2 to 12.5 AFR is tremendous 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Carb Tuning with 02 sensor?
[Re: mopar dave]
#1227753
05/06/12 02:53 PM
05/06/12 02:53 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
I have been told in the past peak power would be found between 12.8 and 13.2, but last time at track car was fastest at 12.5.
There is NO set number ... jet to the fastest MPH
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Re: Carb Tuning with 02 sensor?
[Re: mopar dave]
#1227755
05/06/12 05:18 PM
05/06/12 05:18 PM
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Joined: Jul 2004
Posts: 19,318
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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Although different fuels make max hp w/different afr`s...........
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Carb Tuning with 02 sensor?
[Re: MR_P_BODY]
#1227757
05/06/12 09:48 PM
05/06/12 09:48 PM
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Joined: Mar 2003
Posts: 1,632
Lubbock,TX
DavidDean
top fuel
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top fuel
Joined: Mar 2003
Posts: 1,632
Lubbock,TX
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Quote:
Quote:
I have been told in the past peak power would be found between 12.8 and 13.2, but last time at track car was fastest at 12.5.
There is NO set number ... jet to the fastest MPH
This has been my experience too.So many varibles such as collectors or header primarys which might pull in some air during exhaust pulses. My stuff usually wants numbers that are leaner.
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Re: Carb Tuning with 02 sensor?
[Re: mopar dave]
#1227758
05/06/12 10:18 PM
05/06/12 10:18 PM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Quote:
I was using mobil premium at the time.
Your ideal mixture will probably be closer to 12.2 to one for max power with pump gas. It depends on the manufacturer,but that is a good starting point for low/non ethanol pump premium in my testing.
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