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Weird Lc9 problems

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Old Aug 16, 2017 | 02:33 PM
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Default Weird Lc9 problems

Lc9 5.3 on MS3x
ljms stage 2 twin turbo cam (dot to dot)
Verified timing 3 times at 105 degrees with cyl 1 rocker arms pulled and a piston stop.
My problem is.... With everything set correctly, it may as well be a Honda.
1 month later, I said to hell with it and threw a bunch of timing at it. I went from 105 degrees on the trigger angle to the "normalish" range of 85 degrees.
It woke up... But it still feels a lil flat.

I've read on here that some Dod engines with aftermarket cams installed dot to dot, Will end up being about 8 degrees retarded.
That may be my missing power..
My question is, in the event of a retarded cam, will throwing timing at it, help it to a certain point?
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Old Aug 16, 2017 | 03:12 PM
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No. Adjusting when the spark happens won’t change the fact that the valves are opening/closing at the incorrect times. I don’t really understand what you’ve done, but you can’t adjust the software to make up for an improperly installed cam. Did you degree the cam on installation? If not, that’s what needs to happen.
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Old Aug 16, 2017 | 03:37 PM
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No.. I didn't degree it. The cam is installed straight up.
I'm using megasquirt, I don't know if you're familiar with it. But, you can change the trigger angle. Finding tdc on the balancer requires a value of 105 degrees. It has nothing power wise at that setting.
With a value of 85 degrees, the car feels alot closer to the 6.0 that came out.
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Old Aug 16, 2017 | 11:05 PM
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That wont change the mechanical valve events in any way. Need to degree the cam and go form there.
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Old Aug 17, 2017 | 07:23 AM
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Yes, I'm well aware that won't change the valve events.
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