Aluminum 409 Hits the Dyno

jim_ss409 · Guru

Aluminum 409 Hits the Dyno

long stroke · Canadian Poncho Superstar!

Incredible sweet looking and sounding engine. When can we expect to see the motor in action in that beautiful 61? Concrats on a sweet build of a sweet car. Cheers. George.

57poncho · Uber Guru

Congrats sound great can't wait to see a video of it in action!

jim_ss409 · Guru

long stroke wrote:
Incredible sweet looking and sounding engine. When can we expect to see the motor in action in that beautiful 61? Concrats on a sweet build of a sweet car. Cheers. George.

Thanks. It'll be ready to roll when the tracks open in the spring.

We started out aiming for 9.50's in the 1/4 mile but I think we might run faster than that now.

The engine makes more power than we expected and makes it at a higher rpm than we expected. We might try to limit the rpm's to about 7200 for most races and only rev it right up on those days when we think we can get a really good ET.

GLHS60 · Poncho Master!

That engine sounds really clean and crisp, obviously built and tuned really well. Your high port heads really do the job!!
Sure would like to see some secret internal engine pictures.

Thanks
Randy

427carl · A Poncho Legend!

awesome

jim_ss409 · Guru

GLHS60 wrote:
That engine sounds really clean and crisp, obviously built and tuned really well. Your high port heads really do the job!!
Sure would like to see some secret internal engine pictures.

Thanks
Randy

It's funny, the engine made 858 hp just like it came off the truck with 34 degrees of timing.

In the end we only picked up about 5 horsepower. It ended up with 36 degrees of timing and one jet size richer in the carbs,,, and I'll bet if it wasn't for the cool weather, the out of the box jetting would have been spot on.

The engine sounded a bit stuffed up and sluggish when we ran it on the engine stand with a set of stock cast iron exhaust manifolds (we also had a vacuum leak) but as soon as we bolted on the headers it sounded sharp and responsive.

Here's a link to a build thread on the 348/409 site that pretty much shows all the details...

http://www.348-409.com/forum/index.php?threads/aluminum-409-build.22051/

Magician40 · Poncho Master!

Fantastic.
Brian

Pontiacanada · A Poncho Legend!

No wonder the image was blurry at first!Wow!

GLHS60 · Poncho Master!

jim_ss409 wrote:
GLHS60 wrote:
That engine sounds really clean and crisp, obviously built and tuned really well. Your high port heads really do the job!!
Sure would like to see some secret internal engine pictures.

Thanks
Randy
It's funny, the engine made 858 hp just like it came off the truck with 34 degrees of timing.
In the end we only picked up about 5 horsepower. It ended up with 36 degrees of timing and one jet size richer in the carbs,,, and I'll bet if it wasn't for the cool weather, the out of the box jetting would have been spot on.
The engine sounded a bit stuffed up and sluggish when we ran it on the engine stand with a set of stock cast iron exhaust manifolds (we also had a vacuum leak) but as soon as we bolted on the headers it sounded sharp and responsive.
Here's a link to a build thread on the 348/409 site that pretty much shows all the details...
http://www.348-409.com/forum/index.php?threads/aluminum-409-build.22051/

Thanks for the link Jim, I'll be reading the whole thing!!

Thanks

Randy