Z-28 1/4 Mile Times

[70CitrusZ]

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Camshaft, for one thing...

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That is it, there is no other advantage, if in fact it is an advantage.
The bigger cam would be required to support the higher revs a 302 would need to attain to produce the power required (vs. the 350.)
The lt-1 has screw in studs and guideplates ,smaller cam,
and more cubes.
The reason the factory rated the 302 at a lower RPM was to keep the advertised HP number down. You will note the Boss 302 is also rated at 290hp. Its a simple matter of deciding what advertised HP level needs to be, and pick the RPM point at which that happens and use it.
I do not believe the 302 has any "special" advantage over any other similarly equipped small block,other than perhaps a better rod stroke ratio, and had the engineers at GM been able to use a 327 or a 350 for that matter, I'm sure they would have.
The size choice was only to keep within the SCCA 5.0L limit at the time.
The LT-1 has it over the 302 owing to the cubic inch difference, and all if not more performance pieces.
The LT-1 was unfortunately saddled with a crappy retarded ignition from stock, and a leaner than optimal carb jetting, but a "super tuned" LT-1 is an engine to be reckoned with, and with a much better cam in any of the aftermarket grinds,(even keeping conservative) will show a pretty impressive HP and Torque.

[SamLBInj]

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a "super tuned" LT-1 is an engine to be reckoned with, and will show a pretty impressive HP and Torque.

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[Salvatore]

Sam, I tried to send you a PM clean out your mail box.

[SamLBInj]

Im a pack rat, all deleted, try now..

[musclcar]

my 72 camaro ss runs mid to high 12's with a 350sbc that engine was built using all 70's performance parts.here is what i've done to it :Engine : 350 sbc 425hp /490 ft lbs torque / 11.5:1 compression / ported-polished #462cyl heads 2.02-1.94 valves / GM #3927140 mechanical solid lifter cam257/269 dur. 493/512 lift 112 LSA 4200-7000rpm / pete jackson "noisy"gear drive / early 70's edelbrock TR1-X tunnel ram (2) 70's correctholley 600 vacuum secondary carbs / older mallory unilite mechanicaldistributor and accel super coil / baldwin motion valve covers / flex alite "green" fiberglass flex fan / hedman long tube headers w/ 3" pipeto flowmaster 1 chamber race mufflers terminated at the axle.Transmission: turbo 350 with shift kit and B&M 3000 stall converter.Rear axle: gm 10 bolt with 4.10 gears and welded up spider gears or"lincoln locker"i've had both the edelbrock TM-1 and edelbrock scorpion intakes on this motor with a older holley 850DP and have run high 12's

[rsatz28]

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Who wins the race between two stock Z's.....the '69 or '70 version?
Just curious.

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This type of race?

[Salvatore]

The 70 car if all is equal.

[SamLBInj]

Street tires?, if you are using slicks you should be running alot faster than that with what you have...otherwise you may want to update your suspension..

[rsatz28]

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Street tires?, if you are using slicks you should be running alot faster than that with what you have...otherwise you may want to update your suspension..

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If things work out, I hope to take it back this Sep with drag radials, good tune-up and now have a full MSD ign system. I ran the car last year with the Radial T/A's.

[Jim Ferron]

ET and MPH will also be affected by how you stage the car...deeper = slower ET slower speed...shallow = faster ET and speed.[shallow = givesa rolling 'head start' before the clock starts]