Re: Intake centerline advance/retard
[Re: RATTRAP]
#2452682
02/16/18 06:16 PM
02/16/18 06:16 PM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,197
PA.
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IMO
I would use offset keys to bring it to the cams recommended setting. Not me. I haven’t put a cam straight up in years. If it was mine it would be in around 109 but I’m strictly a drag racer and if you can get it to 60 foot that sucker will run a good number. Heavy cars need all the help they can get.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Intake centerline advance/retard
[Re: RATTRAP]
#2452850
02/16/18 11:40 PM
02/16/18 11:40 PM
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Joined: Aug 2003
Posts: 43,285 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,285
Bend,OR USA
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I thought all the new cams were ground with that accounted for in the grind. Do you know what ASSUME(ASS U ME) means Never assume any mass made after market automotive parts, especially race parts, are ever made dead nuts accurate The timing set can be mismarked, I've seen that a lot with Cloyes timing sets for both BB and early Hemi and L.A. motors The first custom ground solid roller cam I bought(Chrysler 392 hemi boat motors) was ground 8 degrees retarded I installed it and use a degree wheel to check the cam timing at .020, it was off around 3 degrees so I assumed that was good enough, which of course wasn't That bad cam did end up teaching me how to check the LSA the quick way and that helped me under stand a lot more about how camshafts work with hands on experiences
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Intake centerline advance/retard
[Re: 70satelliteguy]
#2453116
02/17/18 05:24 PM
02/17/18 05:24 PM
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Joined: Oct 2007
Posts: 4,210 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,210
New York
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This^^^. If you advance it too much the intake valve will crash.
Boffin Emeritus
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Re: Intake centerline advance/retard
[Re: 70satelliteguy]
#2453164
02/17/18 07:21 PM
02/17/18 07:21 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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Have already verified plenty of clearance at max valve lift. The intake valve is usually closest to the piston at around 10ATDC during the intake opening. With the intake valve at full lift, the crank is at around 113ATDC(in your case ...... which has the piston about 3" away). On a different train of thought...... What are the lobe numbers for that cam? I'm trying to think of a combo like yours where I'd feel a 115lsa would be the preferred choice.......
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Intake centerline advance/retard
[Re: AndyF]
#2453177
02/17/18 07:57 PM
02/17/18 07:57 PM
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Joined: Jul 2005
Posts: 1,301 Penna
70satelliteguy
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,301
Penna
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Gross valve lift intake 800 exhaust 766 duration@ 050 283 294 lobe separation 115.0 lobe lift .4710 intake .4510 exhaust Mike
Last edited by 70satelliteguy; 02/17/18 08:00 PM.
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