Offshoreonly.com - 502 rebuild

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Offshoreonly.com (https://www.offshoreonly.com/forums/)

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- - 502 rebuild (https://www.offshoreonly.com/forums/general-q/357232-502-rebuild.html)

Griff

10-22-2018 01:55 AM

I would do plenty of research before you start ordering any parts.

There are tons of threads in this section for pretty much what you are doing. Just go back and read through old threads.
The ASM intakes are basically the same as 500efi/525efi stuff. You are not going to be able to use any of your current efi stuff except for the ECM which would need custom tuned--on a dyno or in the boat.
I don't see how you'd stay close to budget with all new efi stuff.

MILD THUNDER

10-22-2018 08:56 PM

Quote:

Originally Posted by hogie roll (Post 4654975)

lol I was thinking the same thing. I thought the forum was off his dick.

If you want to hear someone wax poetic about “cylinder filling” he’s your guy. What you’re actually going to get: afr heads and a crane 741 cam with more aggressive ramps. (Doesn’t seem wise for valvetrain life to me?)

dont forget the scorpion rockers, or those special afr heads that aren't actually setup for marine, and come with pacs entry level valvespring aimed at the weekend 396 chevelle crowd that goes to car shows. :)

Craney

10-22-2018 09:15 PM

Quote:

Originally Posted by MILD THUNDER (Post 4655539)

Do you think the heads that have the hard anodized are better set up for marine use?

MILD THUNDER

10-22-2018 09:41 PM

Quote:

Originally Posted by Craney (Post 4655544)

Do you think the heads that have the hard anodized are better set up for marine use?

the anodizing is nice. My concerns were more about the guide clearances. Afr told me they suggest enlarging guide clearance for marine engines. Ole bobs sale pitch was that the heads he sells come "race ready" out of the box for marine. Truth is, they are nothing but the assembly line afr heads, that you would get from summit, jegs, etc with an inconel valve stuck in them, and the springs they install in them.

they dont come with marine clearances, or a custom tailored spring.

if you want a true marine ready head , machined, clearanced, upgraded endurance valve seats, call bob teague . Thats what he sells.

92Cole

10-28-2018 10:27 PM

Thanks for all the help, talked with Bob at kinetics going 509 with AFR 305 heads, carb and Victor jr intake with his cam. Anyone have headers they need gone. Thanks again will updated as I start building

Baja Rooster

10-28-2018 11:32 PM

These are a chunk of change but a solid seller.

https://www.offshoreonly.com/forums/...e-headers.html

Crude Intentions

10-29-2018 01:09 AM

Quote:

Originally Posted by 92Cole (Post 4656481)

good luck. Have a good head guy go through the heads before install. Ask what the valve seat material is. Also watch the cam specs. Many of those cams have been high lift low duration which are known to beat the valvetrain up.

MILD THUNDER

10-29-2018 06:49 AM

I would have went with dart pro 1 marine heads. At least you get a quality valve seat.

92Cole

10-29-2018 10:35 AM

Quote:

Originally Posted by Crude Intentions (Post 4656490)

I thought AFR was a good quality head and Bob Madara was highly recommend thru this site for his cams. What kind of material should I be looking for on valve seats

MILD THUNDER

10-29-2018 11:15 AM

https://www.offshoreonly.com/forums/...e-engines.html

Quote:

Originally Posted by 92Cole (Post 4656541)

I thought AFR was a good quality head and Bob Madara was highly recommend thru this site for his cams. What kind of material should I be looking for on valve seats

Grab a large coffee

https://www.offshoreonly.com/forums/general-q/334544-off-shelf-cam-options-marine-engines.html

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