J-Grind Cam

copojoe · #1 07-08-2005, 07:14 AM

Hello Motion Buddy's! Just was wondering if anyone knows the cam spec's for the Motion J-grind cam? I haven't been on the site in awhile and i just read the post about the 67 chevelle 427 found and it talked about a J-grind cam! I'm a vintage chevy NUT! Love the 427's! I have a COPO 427 Clone! Sorry, can't afford the real deal!

396L35 · #2 07-08-2005, 05:15 PM

Is this the same cam that the L88 had?? Mark

copojoe · #3 07-10-2005, 01:58 AM

Don't know, that's what i'm trying to find out! I hear motion had there own special grind! Is this true? anyone have a ballpark guess what is was? Lift???? duration @.050????

396L35 · #4 07-10-2005, 08:37 AM

I was just looking in my old Motion catalog and it say for the 427 ZLX(550hp) and 454 ZLX(575hp) used the L88 cam with a .580 lift, but the full competition motors 427 ZLX(600hp) and the 454 ZLX(625hp) used a .600 plus lift camshaft... That would be too radical for the street. The grind numbers on the .580 cam are 3879605/3879652. I hope this will help. Mark

**COPO** · #5 07-10-2005, 03:41 PM

I do know the "J Grind" was a .600 plus lift cam. I will dig through some material and see if I can find better specs.

Joe G where are you?

396L35 · #6 07-10-2005, 09:01 PM

I got my info from my Motion catalog from 1975 and the only info was the full competition ZLX cam was a .600 plus lift. I hope you can find out what the grind number is so I can write it down in my notes just incase the L88 cam isn't enough for my 427

. Thanks, Mark

Postsedan · #7 07-11-2005, 12:00 AM

Mark,

When installing this L88 cam....don`t forget to use a lot of WD40 on the install. We hear your favorite lubricant is WD40.

Dan.

JoeG · #8 07-11-2005, 03:27 AM

Hi COPO,
I haven't come up with any specific specs yet,but I haven't gone thru all my notes yet ,other than being a high lift long duration cam--In the meantime, I threw a lifeline to JR to see if he can recall the specs--

55chevy · #9 07-11-2005, 04:21 AM

I looked through a few things I have.. I think the "J" grind might have been the .625-626 lift cam. I have an article on a wildass '68 Motion SS427 L88 Chevelle and it saids it had the "J" cam but didn't list any specs. The "C" grind was .610 lift and is in the Ko-Motion Vette. Thats all I found but I only looked quick.

JoeG · #10 07-11-2005, 05:30 AM

Motion did recommend a bigger cam to get maximum performance from the L/88 -- PHASEIII "S"model--.560/.580 lift--or PHASEIII "C" model--.585/.605 lift----(Competition Only "ROUGH" idle You should be running a 456 or an even better 488 with these cams---Charlie Mason was running a early L/88 CAM .540/.580 in the early days- -Then switched to a Motion J grind( which as someone mentioned was the letter signifying L/88 cam )--I would guess it was the same grind as KO-MOTION---PHASEIII "C" model of a J grind--Will check further----

O.K.--JR Replied back--"You can use the L/88 535 cam or the LS-7 cam I think it ends in 108"---Thanks--Joel