Ryan23silverado

iTrader: (1)

Does the Comp 212/218 high lift cam have advance ground in?

Specs are: 212/218 .558/.563 115 lsa

I remember reading that there was a way to figure valve overlap given the advertised duration at .006, but I forgot the formula. Does anyone know how to do this?

Thanks,
Ryan

Sport Side

iTrader: (6)

+2....maybe

intake duration + exhaust duration / 2 - 2 * lsa
that'll give you the degrees of overlap relative to tdc

you can also figure it out given the valve events @ a certain lift by comparing EC & IO

You should be looking at -15* of overlap.

BADMOFO

Comp cams and Texas Speed and Performance both recommended a custom grind .212/.218 and .557/.562 with a 114+4. The lobe separation is 114, but the 4 degrees in ground into the cam. They both agreed that this would help the low RPM and mid range without sacrificing and top end or drivability. I don't know, but that what they both said indepently of each other, and that's the cam I went with. I can scan the cam card if it would help.

creederado

I got mine through Thunder
Comp
212/218 557/562 114+4
Grind # LS1 3709R /3712R HR 114+4
Dur @.006 265I 271E
Valve Timing
open CLOSE
@.050 INT: 4- BTDC 36 ABDC
EXH 47 BBDC 9- ATDC


Hope this helps

Mr. Sandog

grippy, you listening?

moregrip

iTrader: (8)

what am I listening for?

moregrip

iTrader: (8)

this is what was recommended to me:
114+4
Duration (intake/exaust) 212/219
Lift (intake/exaust) .544/.547
Lobe Center Separation 114
Intake Centerline 110

Mr. Sandog

It costs the same whether you buy an off-the-shelf 212/218 hi-lift cam, or have Comp grind one the way you like it (LSA +/-, advance/retard). There is no reason not to order one to your exact specs.

Ryan23silverado

iTrader: (1)

wow its amaxing i found my posr So for the off the shelf cam highh lift cam is there any advance grod in?

one03sierra

iTrader: (1)

i was told that my cam did not have degrees ground in. even when i asked about the 212-218 i was told no also. this was from comp.