Slant Six Forum :: Edelbrock tuning

Quote:

Ok I'll assume automatic. Return the carb to stock cofiguration. Adjust timing to 15* btdc. Now try it.

Some caveats, you can't mash the throttle pedal at 25mph and expect miracules. It won't happen. This is not a modern computer controlled engine, but a 40 or so year collection of worn parts. Slapping a manifold on and shaving the head will not get you a Mustang killer let alone a Civic muncher.

The 500 avs is a great carb, but by itself it will not make your car a holy street tear. You need a plan, you can follow several builds that have been documented on this site. Any one of them are a proven combination.

This is all true. A stock slant six with nothing more than 9:1 static compression ratio probably is too small of an engine to even use a 500 CFM carb. What cam are you running? What size valves? A 2.76 rear axle gear ratio pretty much guarantees that your engine won't turn enough RPMs to use 500 CFM effectively and an unheated intake is also a poor idea for the street. It will lead to poor fuel distribution and drive-ability problems.

I recommend you make a plate to mount the stock carb on whatever intake you are running and rig up some way to heat the intake (exhaust or water).

Author:	225kid [ Sun Aug 09, 2015 7:47 pm ]
Post subject:
Okay thanks guys

Author:	kesteb [ Mon Aug 10, 2015 9:35 pm ]
Post subject:
Quote: Quote: Ok I'll assume automatic. Return the carb to stock cofiguration. Adjust timing to 15* btdc. Now try it. Some caveats, you can't mash the throttle pedal at 25mph and expect miracules. It won't happen. This is not a modern computer controlled engine, but a 40 or so year collection of worn parts. Slapping a manifold on and shaving the head will not get you a Mustang killer let alone a Civic muncher. The 500 avs is a great carb, but by itself it will not make your car a holy street tear. You need a plan, you can follow several builds that have been documented on this site. Any one of them are a proven combination. This is all true. A stock slant six with nothing more than 9:1 static compression ratio probably is too small of an engine to even use a 500 CFM carb. What cam are you running? What size valves? A 2.76 rear axle gear ratio pretty much guarantees that your engine won't turn enough RPMs to use 500 CFM effectively and an unheated intake is also a poor idea for the street. It will lead to poor fuel distribution and drive-ability problems. I recommend you make a plate to mount the stock carb on whatever intake you are running and rig up some way to heat the intake (exhaust or water). Actually the primaries are smaller then a BBD's. So low speed drivability should be fine. The secondary air flap will never open if there is not enough air speecd thru the carb. Match that with the carb being calibrated for todays fuels, instead what was avaiable 40 years ago, the 500 avs is not a bad choice for a mostly stock engine. You just need a plan and know what to reasonably expect.

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