cubic inches on a 302 bored out .060 - Vintage Mustang Forums

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post #1 of 3 (permalink) Old 03-08-2002, 11:23 PM
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my car will be shipped up here in a few days, it has a 302 in it. don't know what year 302, but anyways, it's bored .060 over. does anyone know what the cubic inches would be for this? plus, i don't plan on racing the car or anything, the motors rebuilt so i bought it with the car, the original 289 suspension would be fine i was told, plus i was told to get a hi performance tranny, and it has a 8 inch rear end, i forget the gear ratio, but would a 8 inch be ok for basically cruising, or should i go to a 9 inch just to make sure. also what gear ratio in the 9 inch. thanks guys.
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post #2 of 3 (permalink) Old 03-08-2002, 11:42 PM
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A .060 over 302 would be 310cid
bore x bore x stroke x no. of cylinders x 0.7854 = cid
An 8" rear is fine for cruising even if you get on it a bit. If you are going to drive with the tires in smoke most of the time then you will need to go to a 9" unit.
post #3 of 3 (permalink) Old 03-09-2002, 12:00 AM
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i forget the gear ratio, but would a 8 inch be ok for basically cruising, or should i go to a 9 inch just to make sure. also what gear ratio in the 9 inch.

Your 8", with street tires, should be good to around 350-375 hp.....maybe a bit less if it's old and hasn't been rebuilt.
Save the 9" stuff for Pro Street and slicks in your light car...

I run one in the race car but it's got a bit more tire and HP...*G*

Not knowing the details of your combination (and I'm guessing a C4 automatic here), I'd say a gear ratio in the 3.00-3.25 range would be great for cruising with occasional bursts of speed. I have 3.00's in the D-coder and find it to be pretty peppy overall though not snap-your-head like the race car...*G* Ideally, I'd love to have 3.25's or 3.50's or possibly 4.11's and an AOD trans....

Anyway, fill us in on the details once the car arrives...
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