Bone Stock 302 Dyno #’s

[juliosz]

Spent yesterday at Jim Kid Motorsport’s dyno with my 302. The engine was rebuilt 30+ years ago so a friend of mine who specializes in Mopars went through it for me. The entire rotating assembly is original as well as the cam and pistons (so standard bore). Has NOS stamped steel rockers as well as NOS lifters and pushrods. The only “enhancements” made are a Cloyes double roller timing chain and Mahle piston rings (also headers). The rotating assembly was also balanced. I converted my distributor from points to Breakerless SE which I had good luck with in my L78 Nova. Unfortunately, this one would start breaking up at 6000. So we ended up swapping it out with an MSD unit. Best pull was 40 degrees advance, 110 octane @6500 = 360 hp. The nice surprise was leaving everything the same but running 93 pump fuel which dropped us about 2 1/2 - 3 hp. If we didn’t run out of time, I think we could have squeezed a few more out advancing to 42. Used a set of new AC 43s and they looked great when we pulled them. Totally happy with the result.

[Big Block Bill]

That's Awesome numbers for a stock 302, congratulations. Bill

[scuncio]

Congrats, great numbers. We need to hook up so I can get you that Emmert license plate frame.

[RALLY]

Nice engine and very good horsepower numbers. Those 302's get with the program.

[JRSully]

still pulling positive HP at 6400, impressive

[BLACKLS5]

Is that Bob K. ?

[napa68]

Awesome Paul:burnout:

[RALLY]

still pulling positive HP at 6400, impressive

Should continue making horsepower to the 7000-7500 RPM range.

[juliosz]

is that bob k. ?

😉

[1971ls6]

Is that Bob K. ?

Yes it is mr 6 pack.

Anyone know who the other guy is?

[juliosz]

Getting closer to coming home……

[GM Powertrain]

Bob Karakashian working on a Chevy. A sure sign of the apocalypse! Don't live too far from that dyno. Didn't even know it was there.

[GM Powertrain]

VERY impressive power from that little 302!

[juliosz]

Bob Karakashian working on a Chevy. A sure sign of the apocalypse! Don't live too far from that dyno. Didn't even know it was there.

Yep, Jim has been in the same location for about 20 years.

[BJCHEV396]

WOW,the Mouse that roared!!

[Vortecpro]

Spent yesterday at Jim Kid Motorsport’s dyno with my 302. The engine was rebuilt 30+ years ago so a friend of mine who specializes in Mopars went through it for me. The entire rotating assembly is original as well as the cam and pistons (so standard bore). Has NOS stamped steel rockers as well as NOS lifters and pushrods. The only “enhancements” made are a Cloyes double roller timing chain and Mahle piston rings (also headers). The rotating assembly was also balanced. I converted my distributor from points to Breakerless SE which I had good luck with in my L78 Nova. Unfortunately, this one would start breaking up at 6000. So we ended up swapping it out with an MSD unit. Best pull was 40 degrees advance, 110 octane @6500 = 360 hp. The nice surprise was leaving everything the same but running 93 pump fuel which dropped us about 2 1/2 - 3 hp. If we didn’t run out of time, I think we could have squeezed a few more out advancing to 42. Used a set of new AC 43s and they looked great when we pulled them. Totally happy with the result.


Very nice! Thanks for posting.

[RALLY]

69 Z-28 302 Engine. A thing of beauty.

[realzed]

Numbers pretty match what my 302 put out on the dyno after rebuilding it back 25 years ago - except mine was .030" over and I had the off road cam in it and it pulled a fair amount less torque early on compared to yours..
I was nervous after just putting it together - so after a short break-in period we only went up to 5500 rpm (I kept thinking about all of the things I might have missed during the rebuild and second guessing myself even though I had gone through everything at least twice.. but that's human nature I guess)!
The dyno guy kept encouraging me to let him lean on it and said it should crank out a lot more with another 1000 rpm of so - but since this was a street car I chickened out, wanting to ensure I kept all of the original parts 'together'..
Certainly, listening to an engine on a dyno is a ton different than hearing one on a pull under the hood of a car - and it does get your attention a lot more~

[NorCam]

Those are stout numbers for a 302 run. The 110 octane sure helped those runs I would say. Most 302's that are set up right are normally pulling in the 345 range.

Well done.

[rszmjt]

I wonder how much it would lose with stock exhaust manifolds and the Z exhaust?

Out of curiosty why does ithave a shortwater pump and by pass hose?

[juliosz]

I wonder how much it would lose with stock exhaust manifolds and the Z exhaust?

Out of curiosty why does ithave a shortwater pump and by pass hose?

https://www.yenko.net/forum/showpost.php?p=1589550&postcount=48

Good question on the stock exhaust, I would venture to say 25-30 hp....anyone?