Dynoed the Dart today..

Posted By: W5Dart378

Dynoed the Dart today.. - 09/24/09 01:07 AM

Last time with W5s it was 555hp ,460tq.

Today with Chapman W9s it made 606hp, 490tq.

Same bottom end, camshaft and carb. Peak power and torque were 500rpm higher with the W9s.

How does this sound? 422" X block.

Posted By: Dodgem

Re: Dynoed the Dart today.. - 09/24/09 01:42 AM

sounds good to me! Real good!

Posted By: 440Jim

Re: Dynoed the Dart today.. - 09/24/09 01:22 PM

I think you will feel the 50 hp difference when running all motor!

Posted By: emarine01

Re: Dynoed the Dart today.. - 09/24/09 01:42 PM

Whats the compression ratio and cam?

Posted By: Cab_Burge

Re: Dynoed the Dart today.. - 09/24/09 03:01 PM

Quote:

Last time with W5s it was 555hp ,460tq.

Today with Chapman W9s it made 606hp, 490tq.

Same bottom end, camshaft and carb. Peak power and torque were 500rpm higher with the W9s.

How does this sound? 422" X block.

Just out of curiosty was that on a engine dyno or chassis dyno? Either way that is a good gain

Posted By: W5Dart378

Re: Dynoed the Dart today.. - 09/24/09 03:06 PM

It's 13:1 now, was 12:1 with the W5s.Camshaft is a Bullet Roller 276/282 around .670",109 lsa in at 104.5.
Made 600hp from 7000-7500.
peak torque is 5800-5900.

I have made about 20 passes with it but all were with a tighter converter and a tall deck W9 intake.Dyno passes were with a new 420 intake,wish I could have conpaired the intakes..

Posted By: W5Dart378

Re: Dynoed the Dart today.. - 09/24/09 03:12 PM

Quote:

Quote:

Last time with W5s it was 555hp ,460tq.

Today with Chapman W9s it made 606hp, 490tq.

Same bottom end, camshaft and carb. Peak power and torque were 500rpm higher with the W9s.

How does this sound? 422" X block.

Just out of curiosty was that on a engine dyno or chassis dyno? Either way that is a good gain

Dynojet chassis dyno.

What is the conversion factor to figure crank hp?

Posted By: Cab_Burge

Re: Dynoed the Dart today.. - 09/24/09 03:17 PM

I don't know, sorry

I'm sure someone will add it onto here soon

I have heard anywhere from 15 to 30 % loss due to drive train friction

Those are some stout numbers, very impressive

Posted By: cudadave72

Re: Dynoed the Dart today.. - 09/24/09 03:32 PM

Stupid question... Is an X block an older version of an R3 block??? Sounds like it holds alot of power.