Whippled 500EFI cam question
 

I did a search and couldn’t find an answer...I’m adding 3.3l whipples to my 100%stock 500EFIs this winter...bottom ends are fine going thru top ends... my question is, i have a pair of 651 cams, would they be too much cam for 500EFIs or should I look for 741s or should I just leave the stock cams in place since I’ll only be about 700-750hp with stock bottom end?

I'd upgrade to the 741,it will get you to the 750 mark.I've done them w/ the 8.1l cam thats a double swap and 240,248,,thats a really nice upgrade.
you have some one to retune it?

What ECM are you planning on using

if i had the 651 cams i would use them,i have used them in a 502 before with good results.

Smitty is your guy, we've done business for a few yrs now, he did my Whipple injectors last yr and have done a couple other sets also

I think we talked before, I have family with a cottege /house in Canadian lakes near Hardy so we could probably meet up over there and run it on the water. Even better though would be for you to drag a motor over and dyno it so we could make sure everything's good and get tune close before going in boat. I just Dynoed a 502 w whipple sidemount for john lambrestge / polebarn racing engines over your way , hes at hardy alot camping, Smitty

You can PM me. I just built a pair and made 760 @5400. I can give you some cam specs and grind info. Was on 3.3 Whipple 509 with 088 heads. Warning! do not send your boxes to Whipple for a flash, they lock them and only a few people can unlock them. Actually 2 come to mind. Good tuners out there and can give insight but I can help with an cam as well.

I have a pair of 651 cams available if you want to use them.

I finally got around to getting the heads off and in to be gone thru...I think I’m going to put the 651 cams in since I have them...any recommendations on lifters and rockers? A buddy has been running the Compcams 15854-16 couple seasons without problems...

I just built a pair of 500 EFI's and used the Comp Cams Pro magnum rockers and if this is a Gen 6 block you can run the GM 17120060 lifters with the dog bone hold downs don't need to go tie bar unless you want to.

it’s a gen 5 block

according to this article the gen V uses the same style lifter that I mentioned

The Gen V conversion to hydraulic roller lifters also effected revisions to the lifter valley with taller cast-in lifter bores needed to accommodate the increased height of the roller lifters. The lifter valley also incorporated a few minor additions of dogbones and a sheet metal “spider” to retain the lifters that we’ll illustrate in the accompanying photo.

https://cimg3.ibsrv.net/gimg/www.off...39fc30357a.jpg

Great..thanks F-2

You also need to upgrade the head gaskets and I would add ARP head bolts

Yea, switching to MLS head gaskets and planned on ARP bolts...the bolts should be standard size like the ARP-135-3701...correct?( I’m using the 088 heads)

If you want to use 12 point, I didnt

ARP-135-3601 it is..and a couple $$ cheaper...thanks

Thinking about this again, you should probably put in a better than stock style OE lifter, your going to be raising the revs and making a lot more power, make sure the valve springs are correct.

JIM V is setting up my heads for me, so I’m sure he will set me up with the correct springs.