thinking about a modern 302

[tom]

Just wondering about the potential for a "modern" 302. If I recall correctly the 302, 327, and 350 all share a 4.00 bore. Any thoughts on recreating the 302 performance using an available 350 block, and hooking it up to a modern very high stall auto trans that could slip all the way into the high rev power band of the 302.

What I am thinking of is a land speed project in the 5 liter automatic trans class.

Tom

[hotrod68]

You just need a crank with a 3" stroke and the pistons with the right pin height to make a 302 out of a 350--no prob there. Imagine a 302 with 6" rods! And you'd need a converter with at least a 3500 stall to make the 302 launch in its powerband. I'd like to see that!

[tom]

I was thinking more like 4000 plus stall speed on a modern overdrive auto with the lockup converter and some long gears in the diff. throw in a couple miles to get up to speed, and some aero work..........

[1968RSZ28]

Just wondering about the potential for a "modern" 302.

The "old reliable" 302 would smoke it!!               

[hotrod68]

Old Reliable is a diety....lol   That thing launches like a dang rocket! Gotta love them 4-speeds and screaming 302s.

[seeburg220]

What compression ratio are you thinking of on this?   I have a 350/350 hp Vette, and it was stock 11:1.  I have since bored it .030 over, making it higher than that.   I have to add lead to get it to not ping.   Just something to consider.

[tom]

I was thinking that not having to be correct for the ECTA meets there would be an opportunity to build a modern 302 that would work in the 5 litre class. The high reving along with the right gears in the rear could make a high top end combination. I don't know what compression I would be looking for, I was kind of hoping for some feedback here.

I was thinking that I might be able to compete with going broke on period correct parts.

[GaryL]

What are the advantages of a "modern" 302?

[tom]

Not needing date correct original GM parts should be less expensive, newer technology heads, intakes, roller cam,  ignition, etc. may offer more power. Besides I don't have a Z and I don't have a DZ block.

Tom

[JKZ27]

Eagle makes a 3" forged crank!

John

[tom]

John,

Thanks!

[melav8r]

The '68 and '69 302 used a 350 block, '67 used a 327 block for that matter, only difference was a 3.00" stroke compared to the 327's  3.25" stroke and the 350's 3.48" stroke.
have fun.

[firstgenaddict]

IF you could get a 6.20 Rod in there you would have a 2.06 rod ratio... and a very light reciprocating assembly (the compression height of the piston is going to be short, yielding a shorter lighter piston) which will maximize the power output, lightening the recip assem minimizes the parasitic power loss of accelerating 8 pistons from a dead stop 2 times per revolution... (at TDC and BDC the piston comes to a complete stop), therefore any reduction in the mass, having to be accelerated, is going to yield a net power increase...
Another factor is the higher rod ratio allows the engine to rev higher with less side loading... if the effective RPM's are increased then the whole mass acceleration issue becomes an even larger factor...   

[L78 steve]

Why would you want a loose converter if  you are looking for top end.Loose converters are for hole shots.Just gear it for the max RPM at the speed the HP will accommodate.

[firstgenaddict]

My dad has been talking about building a Flat Head powered car for the ECTA...