epp blower cam question
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TECH Enthusiast
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From: Brentwood CA
epp blower cam question Does this cam have any advance ground into it? If so how much? Is there somewhere on the cam card that will tell me? sorry for the newb question just want to make sure and I dont know if this is somthing I can find on the card.
Thanks
Thanks
Hear ya go !
INTAKE_.595
EXHAUST_.608
DURATION@.006 TAPPET LIFT INTKE__281 EXH__289
VALVE TIMING @ __.050
OPEN CLOSED
INT 1 BTDC 51 ABDC
EXH 55 BBDC 5 ATDC
SPECS ARE FOR INSTALL @ 115.0 INTAKE CENTER LINE.
DURATION@ .050
iNTAKE ___232
EXHAUST___240
LOBE LIFT .3500 INTAKE
LOBE LIFT .3580 EXHAUST
LSA 115.0
Hope this helps part number is 54-000-11 sn# 8512-06
INTAKE_.595
EXHAUST_.608
DURATION@.006 TAPPET LIFT INTKE__281 EXH__289
VALVE TIMING @ __.050
OPEN CLOSED
INT 1 BTDC 51 ABDC
EXH 55 BBDC 5 ATDC
SPECS ARE FOR INSTALL @ 115.0 INTAKE CENTER LINE.
DURATION@ .050
iNTAKE ___232
EXHAUST___240
LOBE LIFT .3500 INTAKE
LOBE LIFT .3580 EXHAUST
LSA 115.0
Hope this helps part number is 54-000-11 sn# 8512-06
Thread Starter
TECH Enthusiast
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Joined: May 2005
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From: Brentwood CA
Cool thanks guys. I didnt think there would be cause it was made for F/I. How do you figure this out so I know for next time? Also you seem fairly knowlegeable about this, do you think it would be ok to install without degreeing it, or do you think I should?
It is a 408 with afr 205's 66cc .051 head gasket thickness and diamonds with 28cc dish. I know it is a good idea to check ptv clearence but how important is degreeing the cam when I only plan to run it straight up?
Also what is a good ptv clearence?
Thanks
It is a 408 with afr 205's 66cc .051 head gasket thickness and diamonds with 28cc dish. I know it is a good idea to check ptv clearence but how important is degreeing the cam when I only plan to run it straight up?
Also what is a good ptv clearence?
Thanks
TECH Apprentice
Joined: Sep 2005
Posts: 334
Likes: 1
They made it easy on the specs provided by indicating that the LSA and intake centerline are both at 115*; they're the same, so no advance.
Otherwise, you can calculate the centerlines of the intake and exhaust from the valve events to determine whether there is any advance or retard.
Otherwise, you can calculate the centerlines of the intake and exhaust from the valve events to determine whether there is any advance or retard.
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9 Second Club
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From: Norn Iron
I did degree mine. It ended up straight up anyway, so the cam was ground correctly.
As to whether it might be worth advancing a couple of degrees to allow for chain stretch....I dont know. Might be worth it on a new chain. The chain I had when fitting the EPP cam did have some miles on it, so I went for it as is. Maybe only 1000 miles or so though.
Last time I took my engine completely apart, the old duplex chain was very stretched. I didnt measure it though in terms of cam angle. That was with some 10k+ miles.
As to whether it might be worth advancing a couple of degrees to allow for chain stretch....I dont know. Might be worth it on a new chain. The chain I had when fitting the EPP cam did have some miles on it, so I went for it as is. Maybe only 1000 miles or so though.
Last time I took my engine completely apart, the old duplex chain was very stretched. I didnt measure it though in terms of cam angle. That was with some 10k+ miles.
FormerVendor
Joined: Mar 2006
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From: Hell AFB
I would still degree it for a peace of mind, sure it clears on a stock engine, but you never know. Also, say it was ground on a Friday, its always best to check, then check again when it comes to internal work.
