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  how to start out with alchol carb

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Author Topic:   how to start out with alchol carb
cougar395
Journeyman

Posts: 25
From: elgin nd usa
Registered: May 2003

posted 06-18-2003 07:26 PM     Click Here to See the Profile for cougar395   Click Here to Email cougar395     Edit/Delete Message   Reply w/Quote
do you just bolt it on and go any tips on how to get it jetted right and so on its a 950hp alchol carb

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jsracingbbf
Gearhead

Posts: 2751
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 06-18-2003 11:46 PM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
Depends on who makes it. The one I used to have ran regular size jets because C & S specialties designed it that way. It had massive holes drilled in the metering block just above the jets.
It worked flawlessly with 80's at all four corners.
I also ran a Hilborn belt drive pump to supply the carb with plenty of fuel, bypass log was a DSR bypass jet holder and Aeroquip fuel log. Some alky carbs require very large jets, it depends on who made the alky carb.
JS

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kid vishus
Gearhead

Posts: 6098
From: middle of NC
Registered: Oct 2000

posted 06-19-2003 08:00 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
My carb uses the larger alchy jets, AND has the hole drilled in the metering block just above the jets on the primary side. I beleive the HP series carbs take the big jets like mine uses.

For your car, I would bolt it on first and see how it runs. Your motor will let you know if it needs more jet or not. If it starts to lay down on the first pass, get out of the throttle. Alchy burns stuff up in a hurry if it's too lean. I made one pass with mine too lean and it burned the electrodes off half the plugs.
I also run one step colder plug than on gas, and maybe add some initial timing (the last one once again is dependant upon the motor). Plus it helps to have a small bottle of gas to start it the first time for the day. Squirt a little gas down the carb before trying to fire it the first time each day, and it should pop right off. Also, alchy likes heat. Try and keep more heat in the motor than you would normally on gas. I try to stage at 170* with mine. Plus, the last pass of the day, get the temp up over 185* befor shutting it off (I like mine between 190-200), and leave it there, don't run the fans and pump to cool it off. It helps evaporate the moisture out of the crankcase and will keep the oil cleaner.

Good luck.

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