Quote:
Originally Posted by Jerry Clayton
I don't think you can tell the differance in the way the 289/302s rev --there is.019 differance in the stroke and both have the 4.0 bore
A late 302 roller block would be my preferance if I was building a 302 for myself, however if I was building a short deck sbf I would use the Dart block and most likely in aluminmu.
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Jerry, the stroke on a 302 is around 0.130" longer than a 289; not much, so all other things being 'equal', they should both have the potential to rev nicely with such a short stroke (2.87" and 3" for the 302)
While looking up these figures, I checked on the bhp and torque figures for both...
289 K 271bhp @ 6000 and 312lb/ft @ 3400
289 A 225bhp @ 4800 and 305lb/ft @ 3200
302 GT350 250bhp @ 4800 and 310lb/ft @ 2800
Agreed, bare figures don't show the shape of the power and torque curves, so you can't assume from these figures that the 289 A and the 302 GT350 with power peaks at 4800 would be real slugs at anything higher than 5000.
So what do these figures prove? ....er, nothing really. But logic tells me that stroking to 331 or 347 would produce an engine that's less happy at higher revs. But more powerful, yes.
Cheers,
Glen