Cam and Lifters
 

I need to know what cam and lifters to order. I am putting a carded 500 back together should i use Crane #168741 cam with the 112 lobe Sep with the Crane #13532-16 hydraulic roller lifters. Or should i use the Crane #168741 with a 114 lobe Sep and i am not sure what lifters or the part number for the cam since it is a special grind but was told the 114 was in the 525.

I really need to get this stuff ordered by monday. So if someone could help me out and tell me what to get and were to get would be great thanks.

The lifters would be the same. I would use the 525efi cam on the 114. It will have a little better idle. Either cam should be fine though and make pretty much the same hp.

It wouldn't hurt to PM rmbuilder. He has many satisfied customers on OSO.

Does any one have a name and number for rmbuilder?

1-585-654-8583

Just ask to speak with Yoda :D

Thanks kid

Stick with the 741 on 112. Will not reverse with decent exhaust, The 114 is lazy in the mid range. In a 502, the 741 will need a little more compression to work well. The 500efi cam will work better with 8.75CR

So are you saying i should not put the 741 in? Or the 500 in?

if you have good exhaust use 741. it will make a little more cylinder pressure on the 112 and give you more stronger mid. the 114 will have a smoother idle. both cams are so close. just depends on what you want smoother idle or rougher idle with a little more mid. :ernaehrung004:

I have emi exhaust with the silent choice riser. I am not sure if the short risers i have will work. Thanks for the help you guys. As you can probably tell i do not know a whole lot about motors so any help is good. Really all i want to do is put the motor back together the best possible way. I do need a new cam and lifters so i thought i had read somewhere that you might as well put the 525 cam in cause the 500 cam was weak.

With your exhaust, I would use the 525 efi cam on the 114. It will have a smoother idle and less chance of reversion.

So is the part number the 741 with 114 lobe sep? Thanks griff i just found one of your post that said the 525 cam is the 741 with 114 lobe sep. So what lifters should i use and should i get a cam button? Also recommendations on a timing chain? Griff i do appreciate your help thanks bud!

I think you will have to order the 741 on a 114 as a "custom grind" although Crane should have it readily available. There is no publicly available part/grind number that I'm aware of. You need to use a cam button unless you have a Gen VI engine. I'm assuming yours is Gen V with a stamped steel timing cover. When I upgraded my 525SC with a retrofit roller cam, I used all the crane parts that Crane had listed as compatible for the application, including the valve springs, lifters, and timing chain.

If I was going to order anything besides an off the shelf cam, I would probably just contact rmbuilder/Bob. He has some stuff that is definately better than Crane's. The Morel lifters are supposed to be much better than Crane's. He should be able to put together a complete package for you.

I went with the 741 on the 112. Would i benefit from changing the pistons? If so what piston would work best for me?

If you are interested, I have a pair ( for two engines) of 525EFI's cams, lifters, sprockets w/chains that have 70 hours on them.

Ray

how much for one cam and set of lifters?

i may be interested in one set also [email protected]

while we are on the cam thing..was thinking about doing mine as well, have a 509 9.5-1 comp, stock rect port gm heads and alum intake, full stainless marine headers and is a gen VI, thanks guys....Rob

I'm running the emi short stainless steel risers and my cam is a ultradyne bullet racing cam roller with stock lifters dur @ .50 is 228/236 with a .601 int/exh lift . I have no problem with reverision.

This is the cam just for a non roller motor .I had the cam ground for a roller setup and more lift this was a ultradyne cam from the late 80,s for all the big blocks.
http://www.cranecams.com/index.php?s...61&lvl=2&prt=5

mine has the factory roller....gen VI

Hey skaterboy, still have any of those cams ? might be just the ticket if they are for a gen VI..email [email protected]
or call me at 540-786-8111 thanks Rob

Not yet anyway...and yes you have reversion. And to the guy using using the EMI silent choice risers w/ the 525 cam...all I can say is DON'T DO IT and get some expert advice. You can't just take a cam with big duration #'s, sprinkle in a couple degrees of LSA and declare it safe for a marine engine with silent choice risers...overlap is the contingent for reversion, LSA is only a net reducer/increaser of overlap. The 525 cam has alot of overlap and that engine comes with some very long dry exhaust to diminish the effects of water injestion(reversion). Some guys "don't have a problem with reversion" because just maybe they can drop their boat in the water and go, while another with the same set up who has to navigate for lenghty period of time through a no-wake area finds his motor ruined in short order. Lots of factors to consider. Take Care, Dave

I have a brand new was installed but never ran GM cam #12551622 or Merc mag cam.#431-8510478 is 224/ 224 @ .50 duration . 483in -.483 ex lift 115.5 LSA make offer will ship I have all the factory rockers, bolts locks retainer springs for this cam

So really all i need to do is buy the taller risers that emi offers?

they need to be water jacketed out the transom , I may have a set of stainless marine dry for sale. for 1000, if that is cheaper for you.

Hey thanks for the offer air time, what i am gonna do is send in my riser emi and they are gonna cut and fab the end just like the 512 which is a 16 inch long riser.So i will be golden.