Streetable Big Block

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Nov 11, 2008 | 11:11 AM

ws6jesse

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From: arlington heights, Illinois

Streetable Big Block

The motor in my 68 camaro just spun a bearing. Right not its got 11:1 compression and a 588 lift cam, single plain intake and 750 holley. Wasnt the best on gas or even all that fast for that matter. I want to rebuild it to be more streetable. What cam would be good? I still want a nice sounding idle. It has closed chamber heads on it. I would be switching to a dual plain intake. And if i could get away with a 650 carb maybe??? The main duties for this car are street driving and occasional road race and auto cross. If i can make the car go high 12's low 13's and get anything over 10 miles to the gallon id be happy. It also has a six speed tranny. Oh yeah b the way its a 396.

thanks
Jesse
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Nov 11, 2008 | 11:40 AM

blk/slvr02ss

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From: Port Saint Lucie,Florida

I would try to lower the compression w/a thicker head gasket.Edelbrock AirGap intake,Edelbrock 750 Carb,CompCam230/230/-520/520.The Edelbrock Carb is more for the street.W/the car properlly tuned it should get alot better gas milage than it did.

Nov 19, 2008 | 09:25 AM

Darracq

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What heads do you have what is the casting numbers under the valve coveres,What is the duration @50 and lsa. What did the car run in the 1/4 like it was? big blocks are never going to get good gas mileage but you can probably do a little better.

Nov 19, 2008 | 06:23 PM

slow95z

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From: Dublin Ga

definitely drop the comp. down and then you may be able to run a smaller cam. are you now running a double pumper or vac. secondaries 750? you really should be close to 10 mpg's the way it was with a six speed, unless the tune was way out of whack or something. also i would stay away from the edlebrock carb., holley's have always performed better and got just as good fuel economy if tuned right.