Pushrod length measurement - gut check
Thread Starter
Teching In
Joined: Mar 2024
Posts: 4
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Pushrod length measurement - gut check 6.0, standard deck.
Cam Motion Titan stage 3 cam Part # 03-01-0012
Cam motion roller rockers LS039111102
243 heads, cleaned up on head surface (no real milling)
FelPro Permatorque MLS 26192PT head gaskets (0.048"compressed thickness
When I measure the pushrod length using a Proform length checker (67560), I got 7.300" with no pre-load on the lifter. This was measuring #1 with the cam on the base circle. I set #1 at TDC on compression stroke before I put the heads on. I checked both intake and exhaust independently. I measured the adjustable PR with a micrometer. I took the lifter gallery cover off to make sure the lifters were all the way down, touching the cam shaft.
What am I missing? This is a basic LS setup, no crazy changes. There are no 7.300" pushrods, however that is the measurement with no preload. So with 0.050 preload, I'm at 7.350"? Gut check me.
Cam Motion Titan stage 3 cam Part # 03-01-0012
Cam motion roller rockers LS039111102
243 heads, cleaned up on head surface (no real milling)
FelPro Permatorque MLS 26192PT head gaskets (0.048"compressed thickness
When I measure the pushrod length using a Proform length checker (67560), I got 7.300" with no pre-load on the lifter. This was measuring #1 with the cam on the base circle. I set #1 at TDC on compression stroke before I put the heads on. I checked both intake and exhaust independently. I measured the adjustable PR with a micrometer. I took the lifter gallery cover off to make sure the lifters were all the way down, touching the cam shaft.
What am I missing? This is a basic LS setup, no crazy changes. There are no 7.300" pushrods, however that is the measurement with no preload. So with 0.050 preload, I'm at 7.350"? Gut check me.
6.0, standard deck.
Cam Motion Titan stage 3 cam Part # 03-01-0012
Cam motion roller rockers LS039111102
243 heads, cleaned up on head surface (no real milling)
FelPro Permatorque MLS 26192PT head gaskets (0.048"compressed thickness
When I measure the pushrod length using a Proform length checker (67560), I got 7.300" with no pre-load on the lifter. This was measuring #1 with the cam on the base circle. I set #1 at TDC on compression stroke before I put the heads on. I checked both intake and exhaust independently. I measured the adjustable PR with a micrometer. I took the lifter gallery cover off to make sure the lifters were all the way down, touching the cam shaft.
What am I missing? This is a basic LS setup, no crazy changes. There are no 7.300" pushrods, however that is the measurement with no preload. So with 0.050 preload, I'm at 7.350"? Gut check me.
Cam Motion Titan stage 3 cam Part # 03-01-0012
Cam motion roller rockers LS039111102
243 heads, cleaned up on head surface (no real milling)
FelPro Permatorque MLS 26192PT head gaskets (0.048"compressed thickness
When I measure the pushrod length using a Proform length checker (67560), I got 7.300" with no pre-load on the lifter. This was measuring #1 with the cam on the base circle. I set #1 at TDC on compression stroke before I put the heads on. I checked both intake and exhaust independently. I measured the adjustable PR with a micrometer. I took the lifter gallery cover off to make sure the lifters were all the way down, touching the cam shaft.
What am I missing? This is a basic LS setup, no crazy changes. There are no 7.300" pushrods, however that is the measurement with no preload. So with 0.050 preload, I'm at 7.350"? Gut check me.
Thread Starter
Teching In
Joined: Mar 2024
Posts: 4
Likes: 0
Thanks! I had my mind wound up. Built several Gen I sbcs, first LS. so I second guess everything. I see Cam Motion only has 7.375" push rods. I don't see 7.380" but I'm guessing 0.005" isn't too much of big deal.
The deeper end of preload will give you a quieter valvetrain.
