just got a call from my engine builder - (rebuild my carb HP500's) pulled 571 @ 5000 & 608 ft torque @ 4600 - these are preliminary #'s without tuning. I'm going over there after work to check it out - how do these #'s sound???

If you just kept everything stock and simply freshened them up I say it sounds very good.

I just dynoed one of my 500 EFI's last week. We changed the heads to World Merlin II's, Rect Port 320 CC. Bumped the compression fro 8.75:1 up to 9.1:1 and kept everything else stock. Of course freshened up the entire motor.

These are the dyno numbers.

4300 RPM HP= 526.9 Torque = 643.6 Ft Lbs (Max Torque)
5200 RPM HP= 598.0 Torque = 604.0 Ft Lbs (Max HP)

The rev limiter kicked in and it was still making horsepower.

Hope this helps for a comparsion.

Doc

stock heads with some port work & new cams - (freshened up)

not sure of cam specs - (I'll find out) but the second run was even better
5000 Rpm hp 588 tq 618
5200 602 608
5400 615 598
I'll try & post my dyno sheet

impressive

Looks graeat!

Looks great!

Dock and Ran,

I believe those look to be good power numbers on both of your engines! I would sure be happy with those numbers if they were my 502's!

yeah baby!
tell us more about your set up.... what cams and did you have the heads flowed, if so what kinda numbers did you see.
interested for comparison...im sure there are several of us here thatd love to see them while we're still building!!!
thanks
kevin

:d