509 cams and lifters help.

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12-29-2018 | 04:57 AM

#11

Bajaorlando

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The stock lifters can be used on a 741?

12-29-2018 | 12:08 PM

#12

getrdunn

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From: NW Michigan

What gen engines are these? If I'm not mistaking though the mags where baby hyd rollers. If time for engine rebuild OT might consider replacing regardless.

12-29-2018 | 12:15 PM

#13

getrdunn

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From: NW Michigan

Quote:

Originally Posted by sutphen 30

that or maybe,the 8.1L cam thats 240/248 double swap,,works really well in warmed up 502's.

Thats good to know and doesn't seem t oget talked about much. What's est peak hp in a 502-509 with that cam? 5,700/5,800? Just taking a stab at it.

12-29-2018 | 12:47 PM

#14

Baja Rooster

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From: SF Bay Area

Quote:

Originally Posted by Bajaorlando

The stock lifters can be used on a 741?

The stock ZZ502 lifters were a great fit on my 525EFI cam which has identical specs to the 741. I don’t know if the base circle is different though. My lifters had very few hours on them so I reused them.

12-29-2018 | 04:31 PM

#15

mike tkach

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From: yorkville,il

Quote:

Originally Posted by Baja Rooster

base circle is the same,only thing different is the lsa,74 1 is 112,525 efi cam is 114.

12-29-2018 | 07:16 PM

#16

tripps

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From: babylon,NY 11702-4116

Cam

What can is the 8.1L cam???

12-29-2018 | 07:18 PM

#17

Ryan00TJ

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Joined: Nov 2006

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From: Tygart Lake, WV

http://www.cpgnation.com/comp-cams-xtreme-marine-525-efi-camshaft/

No need to reinvent the wheel. 525EFI cam works great for 502/509 builds. Comp grinds it if you can't find a Merc takeout. Your 088 heads are what needs attention and upgraded. Power is in the heads.

Last edited by Ryan00TJ; 12-29-2018 at 07:24 PM.