Comp Grind is off
Comp Grind is off I ordered a 230/234 .612 .598 111 +2
...I got a 231.6/235.8 .616 .601 112.3 I'm not sure what the advance was.
What gives?! From 111 to 112.3, that seems a bit too far off to me! That changes my DCR and my overlap! I REALLY want to send it back! Thoughts?
This looks like a trend based off this thread.
...I got a 231.6/235.8 .616 .601 112.3 I'm not sure what the advance was.
What gives?! From 111 to 112.3, that seems a bit too far off to me! That changes my DCR and my overlap! I REALLY want to send it back! Thoughts?
This looks like a trend based off this thread.
Well, it's never going to be dead on, but that looks a bit out of spec if you ordered it on a 111. Have you called them up and told them about it yet? That would be my first move.
Originally Posted by speed_demon24
That's nothing to worry about, and if you aren't going to degree it when you put it in then I wouldn't even think twice about it.
Originally Posted by speed_demon24
That's nothing to worry about, and if you aren't going to degree it when you put it in then I wouldn't even think twice about it.
How do I figure out the advance based on this?
LSA - ICL so you have about 2 degrees of advance. If its really bothering you call comp and see what they say they might be able to grind you a new cam thats closser to the specs you want.
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Originally Posted by Xtnct00WS6
I ordered a 230/234 .612 .598 111 +2
...I got a 231.6/235.8 .616 .601 112.3 I'm not sure what the advance was.
What gives?! From 111 to 112.3, that seems a bit too far off to me! That changes my DCR and my overlap! I REALLY want to send it back! Thoughts?
This looks like a trend based off this thread.
...I got a 231.6/235.8 .616 .601 112.3 I'm not sure what the advance was.
What gives?! From 111 to 112.3, that seems a bit too far off to me! That changes my DCR and my overlap! I REALLY want to send it back! Thoughts?
This looks like a trend based off this thread.
You cam is only 1.3 degrees off. Going on what Comp told me from my bad grind fiasco, anything under 2 degrees is in tolerance. In my case, Some of my lobes were beyond two degees off on the advance so they reground it for me.
Hammer
So if I asked for a 110 LSA and they gave me a 111.9, it's within their tolerance? I could understand that when it comes to duration, but not LSA. I don't remember seeing that much change in LSA from other people's results. Thanks for the help everyone.
I'm sending it back to Thunder by the way. They're going to double check the specs for me. They've always treated me pretty well so it looks like it'll get taken care of.
I'm sending it back to Thunder by the way. They're going to double check the specs for me. They've always treated me pretty well so it looks like it'll get taken care of.
Originally Posted by Xtnct00WS6
So if I asked for a 110 LSA and they gave me a 111.9, it's within their tolerance? I could understand that when it comes to duration, but not LSA. I don't remember seeing that much change in LSA from other people's results. Thanks for the help everyone.
Hammer
Originally Posted by Fraser@speedinc
I'm sure if more people had their cam doctored they would have similar findings, from comp, cam motion, lunati, etc.
yes sir, very true!
mine is a 248/254 on a 110 LSA...
actually its a 248.2/253.7 on a 110.9 LSA which is fairly close but not EXACT
BTW +/- 2 degrees is not gonna make or break you in a street car/motor
now if its a custom high dollar race motor that COULD be a slightly different story.
Originally Posted by SSwanner
yes sir, very true!
mine is a 248/254 on a 110 LSA...
actually its a 248.2/253.7 on a 110.9 LSA which is fairly close but not EXACT
BTW +/- 2 degrees is not gonna make or break you in a street car/motor now if its a custom high dollar race motor that COULD be a slightly different story.
mine is a 248/254 on a 110 LSA...
actually its a 248.2/253.7 on a 110.9 LSA which is fairly close but not EXACT
BTW +/- 2 degrees is not gonna make or break you in a street car/motor
now if its a custom high dollar race motor that COULD be a slightly different story. Well I put the new specs into the VE calculator and it seems like my overlap is not changed. The extra duration makes up for the wider LSA to keep the valve events similiar. It still lowers my DCR a decent amount.
Originally Posted by nmp27
Same here, mine was about 1.5 off, but what can you do, chain stretch can easily make that up.. OR make it worse 
Thanks