Cam specs....opinions
 

I'm building a 509, 088 heads, gasket matched to a dart single plane intake, short radius cleaned up and a little bowl work, topped with a 850 Holley, roller rockers, gen 6 block. Motor has steel crank, dimple rods, je flat top with 3cc valve relief. I'm going to shoot for 9.2:1 compression. Gil exhaust with dry risers extended to the transom before the water dumps into exhaust.

A buddy has this cam he didn't use and was for a very similar build to mine for his boat. It's a cam motion grind.

236 in duration
244 ex duration

629 in lift
612 ex lift

112 lobe sep

108 in center line

8620 core

I was planning on going with bob or young performance, but came across this and I can get a good deal on the cam.


Any opinions on the numbers?

Boat is a velocity 280 with b1

I'm shooting for 600 hp or as close as I can get with the parts I have. Heads aren't in the budget at this time.

Thanks in advance.

Thats pretty close to what I had in mine when I had the 088's on it. 509ci, same JE pistons.

236/244
650/603
112 LC

Made 580/605 on dyno

Good luck

imo,that cam will work good with the rest of your parts.

Seems similar to the crane 741 cam. Works well in a 509. Should peak in the 5500-5800RPM region. Good luck

Sure you don't have those lift numbers swoped? If they were the other way it would be almost the exact same cam as the Crane 741, 236/244, 610/632, 112. Crane advises 10.5:1 or more compression with that cam but you will be limited from anything like that with iron heads. IMO for you to see near 600hp your going to have to really spin that thing up there. May not have enough downstairs to get that big of a single engine boat rollin that fast with out under proping it.

Didn't catch your post there before I replied Thunder. Was thinking that cam in a 28' single would be more at home in a 540+.

A buddy of mine had that cam in a 509. Merlin iron heads, flat top pistons, dart single plane intake and 800 holley. Right around 600HP/600Ft lbs. I lost the dyno sheets but I wanna say tq peaked about 4600, and hp around 5700. Ran strong and sounded good.

Sorry pickle, we must have been posting at same time.

That cams not far off from the 525EFI cam, works ok in a 502...The 088s leave a little to be desired but should do ok....

Thanks for all the comments guys! It sounds like this cam should work ok and get me close to the 600hp goal I have. I agree the heads leave power on the table, but they just aren't in the budget to get the boat done for spring. I wanted to go with a set of afr 305's.

I'm assuming this cam will work ok when I do change the heads?

One more question is about the lifters. These lifters only have 60 hours on them, but not sure if they will work with this size cam. They are the factory lifters that come with a 502 mag (gen 6). They don't have the link bars. I realize each motor may be different, but were you guys able to run the factory style lifters or did you have to go to link bar lifters?

This is a single engine 28' boat. I figured I would have to spin 55-5800 rpms.


Again, thanks again for the help!

About the lifters, well I heard the factory lifters don't like that much, I got the Lunati cam damn near the same, 234/244 .629/.612 114 LSA 112 ICL and I called Lunati for the recomended lifters because I wanted to go with the cheaper street rollers with the link bar for $300 and some change, I told them what I was going to use it for and they suggested I go with the High RPM ones that are stronger and can take a beating, but they were $600. Well either it was good advise or a sales pitch, I went with the $600 ones, I guess for me it's cheap piece of mind. Just my 2 cents!! Hopefully the motor people will give some insight on this. Thank to the guy's that have given me advice!