should this cam clear?
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
should this cam clear? stock bottom LS2 with TFS 225 heads. stock LS2 gaskets.
the cam is a 236/242 .612/.612 110+4
here are the full specs on the cam. PN 190265-10
http://www.howardscams.com/chevrolet...l-1997-present
would you expect this cam to clear on this combo?
the cam is a 236/242 .612/.612 110+4
here are the full specs on the cam. PN 190265-10
http://www.howardscams.com/chevrolet...l-1997-present
would you expect this cam to clear on this combo?
Joined: Nov 2001
Posts: 3,043
Likes: 0
From: Texas and Qatar
stock bottom LS2 with TFS 225 heads. stock LS2 gaskets.
the cam is a 236/242 .612/.612 110+4
here are the full specs on the cam. PN 190265-10
http://www.howardscams.com/chevrolet...l-1997-present
would you expect this cam to clear on this combo?
the cam is a 236/242 .612/.612 110+4
here are the full specs on the cam. PN 190265-10
http://www.howardscams.com/chevrolet...l-1997-present
would you expect this cam to clear on this combo?
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
i measured. exhaust clears on the tight side and the intake is stuffed into the piston at 5* atdc. although the engine turns over fine, but there's virtually zero clearance on the dial indicator. who rents some flycutting tools?
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
quick question. i'm new to playing with degree wheels and looking at cam events.
should my intake valve start opening as soon as 46* BTDC?
im basically measuring by having my dial indicator on top of the pushrod while on the base circle and rotating the engine clockwise until i see that dial indicator move. i always thought that the intake valve doesnt open until the piston passes TDC.
should my intake valve start opening as soon as 46* BTDC?
im basically measuring by having my dial indicator on top of the pushrod while on the base circle and rotating the engine clockwise until i see that dial indicator move. i always thought that the intake valve doesnt open until the piston passes TDC.
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No that is using the advertised duration at .006
Your going to want a minimum clearance .040 and even then your not safe if there is any slack in your timing set. Should be safe at .060 but you really wanna see .080
Take the advance out of the cam and check... fly cutting the pistons is going to be your best solution.
Your going to want a minimum clearance .040 and even then your not safe if there is any slack in your timing set. Should be safe at .060 but you really wanna see .080
Take the advance out of the cam and check... fly cutting the pistons is going to be your best solution.
No that is using the advertised duration at .006
Your going to want a minimum clearance .040 and even then your not safe if there is any slack in your timing set. Should be safe at .060 but you really wanna see .080
Take the advance out of the cam and check... fly cutting the pistons is going to be your best solution.
Your going to want a minimum clearance .040 and even then your not safe if there is any slack in your timing set. Should be safe at .060 but you really wanna see .080
Take the advance out of the cam and check... fly cutting the pistons is going to be your best solution.
TECH Apprentice
Joined: Oct 2008
Posts: 330
Likes: 0
From: Wheaton, Illinois
stock bottom LS2 with TFS 225 heads. stock LS2 gaskets.
the cam is a 236/242 .612/.612 110+4
here are the full specs on the cam. PN 190265-10
http://www.howardscams.com/chevrolet...l-1997-present
would you expect this cam to clear on this combo?
the cam is a 236/242 .612/.612 110+4
here are the full specs on the cam. PN 190265-10
http://www.howardscams.com/chevrolet...l-1997-present
would you expect this cam to clear on this combo?
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
i measured and came up with .097 on intake and zero clearance on the intake side. the motor turns fine but the dial indicator shows zero from 3-108 ATDC. time to cut!
If you have an adjustable set, you could try advancing the cam to give some of that intake clearance to the exhaust side (so to speak).
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
No he is correct. Advancing the cam will make the exhaust valve open and close sooner. Closing it sooner will gain exhaust valve clearance as the EVC event will occur sooner before the piston reaches TDC.
