Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#1
07-08-2005, 07:14 AM
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J-Grind Cam
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!
 
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COPOJOE 427 
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#3
07-10-2005, 01:58 AM
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Re: J-Grind Cam
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????
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COPOJOE 427
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#4
07-10-2005, 08:37 AM
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Re: J-Grind Cam
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
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Mark
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#5
07-10-2005, 03:41 PM
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Re: J-Grind Cam
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?
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#6
07-10-2005, 09:01 PM
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Re: J-Grind Cam
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
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Mark
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#7
07-11-2005, 12:00 AM
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Re: J-Grind Cam
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.
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69 300 Deluxe Post Sedan Frost Green 69 SS396 300 Deluxe Post Sedan Lemans Blue SOLD 70 Buick Skylark Post Sedan Gulfstream Blue 70 Buick Skylark Post Sedan Burnished Saddle http://m.youtube.com/watch?v=PM3DE8qI2NY https://m.youtube.com/watch?v=Yn4xEmGypUw
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#8
07-11-2005, 03:27 AM
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Re: J-Grind Cam
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--
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#9
07-11-2005, 04:21 AM
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Re: J-Grind Cam
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.
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https://t.me/pump_upp
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#10
07-11-2005, 05:30 AM
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Re: J-Grind Cam
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
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