cold cranking amps
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
It somewhat depends on what other electrical accessories you will be running but if it were mine I'd run a minimum of 500 cold cranking Amps. You can't have too many. Even 700-800 is not out of the question. Usually, the higher the cold cranking Amps are the longer the battery lasts.
Welder User
Joined: Feb 2009
Posts: 5,269
Likes: 50
From: northwest MT
Motor won't start, or does it just crank slow before it starts? New motors are usually a little tight....hopefully it's not TOO tight. 650 CC amps should be enough. You may want to check out your starter and make sure it's not dragging....
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New User
Joined: Dec 2010
Posts: 14
Likes: 0
I installed a brand new starter witht the remanufactured long block. Its a pre-73 302. Idk if the compression is to high or maybe I just need to charge the battery?
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Elder User
Joined: May 2006
Posts: 907
Likes: 1
From: Kansas City, Mo
Are your grounds and battery cables the correct size? Are the connections tight for grounds and cables? Some aftermarket battery cable terminals don't match the battery stud angles. (Surfaces don't match.) When someone turns the key to start, does the starter solenold sound strong or weak? Positive starter connection tight? chuck
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New User
Joined: Dec 2010
Posts: 14
Likes: 0
Well the grounds may not be the best. And the solenoid sounds strong but I plan on replacing that also...I put the battery on charge and I'm gona leave it over night. I'll update tomorrow. Thanks everyone!
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
Senior User
Joined: Jul 2007
Posts: 310
Likes: 0
From: Weston-super-Mare (UK)
Also check your neutral safety switch is functioning correctly - I just remembered I had a slight issue with mine that caused a few problems and once I'd reset it the problem dissappeared straight away.
Also, have you changed any wiring or was the wiring you already had correct for the 302?
Also, have you changed any wiring or was the wiring you already had correct for the 302?
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New User
Joined: Dec 2010
Posts: 14
Likes: 0
There is no safety switch. I'm assuming I need that for inspection right now all I do is hit the ignition with no key and The motor is turning over now. It was the grounds... I grounded the motor and the battery to thr frame rail and made sure it was bare metal. Now it turns but won't start.... On to the fuel and redoing the points on the distributor. And hopefully I get that rigjht. Oh. And the wiring was already done for the 302. The previous owner drove it around for a while before I got the truck.