68 z/28 302 question

motionwannabe · #1 09-17-2009, 07:47 AM

My uncle owns a 68 z/28.It is all stock he said he had it dyno'd and it was 453 horsepower. Is this possible? I havent seen the dyno sheet. just asking opinions

**SuperNovaSS** · #2 09-17-2009, 09:15 AM

All stock, no.

Jason

TXZS · #3 09-17-2009, 07:07 PM

IMHO it depends on who built the engine. If the General built the engine, the answer would be "No".

VintageMusclecar · #4 09-17-2009, 07:19 PM

In factory-delivered "stock" trim, no.

Built to NHRA "stock eliminator" specs, those #'s are attainable.

**Salvatore** · #5 09-17-2009, 07:25 PM

DITTO what Eric said! Ask Jerry MacNeish, he may tell you his dyno numbers! I know he has em.

**Stefano** · #6 09-17-2009, 07:37 PM

TRACO blueprinted a 302 engine, added an off road cam and an X-Ram to get that kind of flywheel horsepower.

TXZS · #7 09-17-2009, 07:39 PM

I bet Jerry will not reveal his dyno numbers, but his times are in the very low 10.70s, which would take every bit of 453hp at the wheels.

**njsteve** · #8 09-17-2009, 08:39 PM

Is your uncle Jerry McNeish?

firez · #9 09-17-2009, 09:01 PM

Jerrys new 67 Z28 went at 475 HP according to his web site on the new car.

motionwannabe · #10 09-17-2009, 09:35 PM

no my uncle isnt jerry. he has a 68 z28 4spd with 4.56gears. i believe his car has dealer ordered headers and intake manifold and i want to say a cam also. im not possitive. he had kept it hidden for a long time until last spring. he finally got it out and started messing with it and said he had it dyno'd and that 453 was what the dyno read