valve spring life??
Thread Starter
Burning Brakes
Joined: Apr 2009
Posts: 899
Likes: 209
From: Louisville KY
valve spring life??
I installed Comp Cams valve springs in late 2009 (spring # 26925, retainer # 1779, spring seat # 1695). These springs were installed with Spin's 230/234 cam. A new Katech IWIS timing chain was also installed. With other supporting mods recommended by Spin the car has made close to 500 RWHP.
This build has app 8000 street miles on it with no racing. Question is do these springs need to be changed at intervals based on miles, use ect. ????
This build has app 8000 street miles on it with no racing. Question is do these springs need to be changed at intervals based on miles, use ect. ????
Thread Starter
Burning Brakes
Joined: Apr 2009
Posts: 899
Likes: 209
From: Louisville KY
The cam specs are:
Comp Cams part # 146-000-11
Grind # LS2 3016R/3727R
Intake duration 230 deg , .613 lift, XFI lobe
Intake opens 3 deg. BTDC, closes 47 deg ABDC
Intake Center line 112
Exhaust duration 234 deg ,.598 lift, XER lobe
Exhaust opens 53 deg BBDC, closes 1 deg ATDC
114 LSA + 2 deg advance
Intake CL 112 deg
Exhaust CL 116 deg
Instructor
Joined: Aug 2007
Posts: 154
Likes: 0
From: Belton Tx
A lot can effect valve spring life. A cold spring (doesn't let oil temp come up to normal operating temp) that see's higher RPMs will fail sooner. I recommend every 25k miles to be on the side of caution. a few dollars to replace valve springs vs replacing an entire engine when you drop a valve.
Burning Brakes
Joined: Aug 2011
Posts: 967
Likes: 1
to add life, if your vehicle is dormant over the winter months/storage months, back the rockers off
used to be an old trick for solid cams, the ole rule was anything past .550
not sure if you race the car often, but i've heard people use drop in mph as another factor when needing them replaced
you'll see that more with solid cam profiles since they work the springs more
used to be an old trick for solid cams, the ole rule was anything past .550
not sure if you race the car often, but i've heard people use drop in mph as another factor when needing them replaced
you'll see that more with solid cam profiles since they work the springs more
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