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need some info on timing and fuel pressure
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Author:  diamonddav [ Tue Jun 28, 2011 8:22 pm ]
Post subject:  need some info on timing and fuel pressure

i got a 1641 w/ engle 100 cam, just bought a weber 40 idf carb for it, installing tonite, but last time out i was having problems and stuck like chuck and drunk so i started messin with the distributor tryin to get it to crank better! think i was hydro locked cuz of the junk solex carb but anyhow, puttin new carb on it with a fuel pressure regulator. what should i set the regulator at? im thinkin 2 psi but would like some input. also at what degree should my timing be set at when i get all together and running, thanks in advance for any info and help! tryin to get this thing runnin for the hillclimb at harlan!!!!!!!!! see you all there

Author:  bluebuggy [ Tue Jun 28, 2011 8:40 pm ]
Post subject:  Re: need some info on timing and fuel pressure

4psi Is what i think most run or i have in the past and 7.5 BTDC

Author:  Aaron Creech [ Wed Jun 29, 2011 12:27 am ]
Post subject:  Re: need some info on timing and fuel pressure

Are you running a stock pump or electric? If stock you don't need a regulator.That carb only needs about 2-3 psi.Set the timing at 30 degrees at 3000 rpm.Run 93 octane gas.

Author:  Odyknuck [ Wed Jun 29, 2011 8:16 am ]
Post subject:  Re: need some info on timing and fuel pressure

Aaron Creech wrote:
Are you running a stock pump or electric? If stock you don't need a regulator.That carb only needs about 2-3 psi.Set the timing at 30 degrees at 3000 rpm.Run 93 octane gas.


Curious why you would run 93 Octane in a 1641 motor. Is the compression above 8.5:1? Regular gas actually burns hotter and will produce more power than a higher octane that is formulated for higher compression motors.

Author:  chris38375 [ Wed Jun 29, 2011 9:31 am ]
Post subject:  Re: need some info on timing and fuel pressure

Odyknuck wrote:
Aaron Creech wrote:
Are you running a stock pump or electric? If stock you don't need a regulator.That carb only needs about 2-3 psi.Set the timing at 30 degrees at 3000 rpm.Run 93 octane gas.


Curious why you would run 93 Octane in a 1641 motor. Is the compression above 8.5:1? Regular gas actually burns hotter and will produce more power than a higher octane that is formulated for higher compression motors.

inside the fuel lid on a stock beetle says 92 octane min.

Author:  Odyknuck [ Wed Jun 29, 2011 10:29 am ]
Post subject:  Re: need some info on timing and fuel pressure

Ah! I did not know that. I stand corrected.

Author:  diamonddav [ Wed Jun 29, 2011 11:49 am ]
Post subject:  Re: need some info on timing and fuel pressure

arron its an electric pump, i have an aj block, originally fuel injected. ray and erics my buds, i'll be comin to see you soon!so would 2 setting be fine?

Author:  bige70chevy [ Wed Jun 29, 2011 6:40 pm ]
Post subject:  Re: need some info on timing and fuel pressure

diamonddav wrote:
arron its an electric pump, i have an aj block, originally fuel injected. ray and erics my buds, i'll be comin to see you soon!so would 2 setting be fine?

put it right before 3 and you should be good to go

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