Re: HP500s Carb build-up
 

Not sure....I haven't even been on the boat yet. I have been told 98 when it was first installed (boat was new), I've heard near 95 (sometime after it was delivered), and I was told 85 on the water last week with the drives tucked IN!!! (can't verify any of this). It is a M3 intercooled system running un-known boost. Probably 5-8 PSI. Like I said I will be selling the entire Prochrager systems this fall and going back N/A EFI.
Stock 382 with 500's should run 74, a new 382 w/ 600's runs 84, the 700's supposedly hits 93.

Russ C.

Re: HP500s Carb build-up
 

i am also going to pull my 500s this winter and shoot for 600 hp so i am also interested in any input. i know excursion on here did his 2 winters ago to around 600 hp i beleive. would be nice to get all the info as what to use from someone who has done it with good results.

Re: HP500s Carb build-up
 

Let me know when you sell em. I may be looking for some for my 500's. :cool:

Re: HP500s Carb build-up
 

Keep carb (Holley 800)
Keep intake (Dart)
Cast Iron heads ported by Jim Valeko or New Aluminum AFR's with valvetrain spec'd by RmBuilder
Cam by RmBuilder
Shortblock can be stock - just make sure it is fresh.

=====================
Exhaust is important and expensive. Do this correctly.

======================
Prop to where engine makes peak hp. Do not lug it by propping in between torque peak and hp peak.

Re: HP500s Carb build-up
 

SB,
Thanks for the recommendations. :D
Dean

Re: HP500s Carb build-up
 

Dean and everyone

let's keep this thread alive thru the winter as there are alot of us with 500's that are due for freshining and upgrading.

Re: HP500s Carb build-up
 

Here is a link to the build I did on a 502 Mag last year....

http://www.offshoreonly.com/forums/s...d.php?t=101736

I have 74 hours on it so far and it's STILL runnin' strong :D :D


Doug

Re: HP500s Carb build-up
 

Bringing this back up to see if anyone has started their build I am meeting with my engine guy this weekend. I am looking to make between 600-650 from my 502. I would like to hit aprox upper 70's in a 29 single scarab running a 28 pitch prop.

Re: HP500s Carb build-up
 

Good luck with the build...PM me if I can help!

Dave

Re: HP500s Carb build-up
 

No, but I did buy the base stuff. I'll probably just change springs, headgaskets, clean it up, and call it good.