I put a 2" HVH carb spacer on my 502 omc, just wondering if anyone has Dyned there motor,and seen any h.p numbers with the spacer.

On a 582 CI N/A engine, the increase was supposedly 18HP on the dyno. Don't know what/if anything would be seen on a stock 502 engine.

I put a 1" JOMAR Performance tapered 4 hole spacer on my 522 and it improved the throttle response dramatically. The top end difference was barely noticeable, although 18hp is about 1mph. Definitely worth it though, I'm having so much fun jumping on the gas I will probably break my drive now.

Yup we picked up 1 hp @5600, Took it off and lost 1 hp put it back on made 1 hp more . That was the 1" spacer on a 582hp 515........

same here got more hp . dyno my 540 try dif. kinds the 4hole made the most hp

I picked up 1 mph on my Checkmate with a 516 cid engine...


It's one of those things you just have to try.. Definitely not a miracle cure for anything but it DID work for me...

Your best bet would be to contact Scott at CFM technologies..... I believe he had a hand in the development of it....


http://www.cfm-tech.com/index.htm


Doug

Read what we found out about it on the dyno..had lean issues pulled the spacer off and help out getting the a/f ratio richer.

http://www.offshoreonly.com/forums/g...-arrestor.html

i did read your post . has same thing on my motor went with a 1000holly. 850 was to small.and the flame arest i went bigger.