Dyno-ed my small block

Dwight · #1 (**permalink**) 05-29-2009, 02:41 PM

I build a 354 stroker (302 block with a 3.47" stroke) two years ago. Dyno-ed at 323 rwhp and 375 rwtq. I was a little disappointed. Last summer I removed the heads because I installed push rods that were to short and they wore out the valve guides. I'm

. I called Keith Craft and ordered a pair of his 195 Brodix KC Signature heads and a cam. Last fall after I finished Lainhart's car and remodeled the kitchen, I worked my motor. I bought a Victor 5.0 intake, 1" spacer, fuel rails, Classic mufflers and a bunch of other stuff to make it all work. Last Friday Lainhart trailers my Cobra to the dyno shop in Memphis, Tenn. to get the chip re-tuned. They tried several times to make a pull but the motor would not run correctly. At idle is was ok but 3000 rpm's it was 18 to 1 air fuel ratio. We decided the computer was dead and maybe the chip. I'm sick. I had to leave the Cobra there. When I got home I found another computer and had it shipped to the dyno shop. Today I get a call from Joe to come and pick up my Cobra. Great news, it runs. And it made 402 rwhp and 416 rwtq. Not bad for a small block. Tomorrow Coach will drive me to Memphis, Tn to pick up my Cobra and I plan on driving it back, even in the rains.

Now that I think back on it, I tack welded a new bracket in place for my new fan. Then I removed the bracket and welded it up. But I did not disconnect my computer before I did the tack up. Live and learn.
It's been a long winter!

See yus' guys on the Main Street of London next month.

Dwight

DocDirk · #2 (**permalink**) 05-29-2009, 03:23 PM

Congratulations Dwight! All that work, finally rewarded with the performance you were looking for

Many of us can empathize; it's really good to hear about when it finally works out!

BTW what a beeeeooooootiful car that yaller one!!

Regards,

Dirk

Xavier · #3 (**permalink**) 05-29-2009, 04:13 PM

Great Dwight! Good for you, makes me feel better too, because I thought that stuff only happend to me...phew. Good job.

Dwight · #4 (**permalink**) 05-29-2009, 06:27 PM

Thanks guys

The Alabama Cobra Gang met tonight and ate BBQ at a local restaurant. We talked about "The Yellow Cobra" and the weather for Saturday. No Rain! Also got Coach to tell us a few baseball stories. I love a good story.

I understand that a live axle Cobra has about a 20% power train loss. If this is true my little motor is making close to 500 at the flywheel. Not bad.
I will check the gas mileage on the 160 mile return trip from Memphis tomorrow. That should give me an idea of the mileage I should get. Getting ready for London in June.

Gas mileage and Cobra, is that a oxymoron?

Dwight