Trigger finger is itching for one of these cams
#21
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Good choice man. Good luck with it. I put a Trex cam in mine first and I thought I was clear. Got really close at .53. Fortunatly just at idle the first day I had a lifter tapping. Pulled the heads, and saw little marks on every piston where the exhaust valve was hitting. I took a step down to the RapTR and I am very pleased with the performance. Have fun.
#22
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Good choice man. Good luck with it. I put a Trex cam in mine first and I thought I was clear. Got really close at .53. Fortunatly just at idle the first day I had a lifter tapping. Pulled the heads, and saw little marks on every piston where the exhaust valve was hitting. I took a step down to the RapTR and I am very pleased with the performance. Have fun.
What clearance did you get with the RapTR? Any numbers with it?
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Sorry man, I was off a bit. .103 on the exhaust, and .124 on the intake. Preload was right at .100
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Here is a procedure:
http://www.diyporting.com/PVC.html
We will check it as best possible. Looks like the exhaust is more of the issue.
What's min numbers? Seems it varies according to who you talk with.
#28
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Did you do any measurements with clay or valve drop?
Here is a procedure:
http://www.diyporting.com/PVC.html
We will check it as best possible. Looks like the exhaust is more of the issue.
What's min numbers? Seems it varies according to who you talk with.
Here is a procedure:
http://www.diyporting.com/PVC.html
We will check it as best possible. Looks like the exhaust is more of the issue.
What's min numbers? Seems it varies according to who you talk with.
I brought Geoff my heads and he pulled two springs off and measured the distance it took for the valve to stop laying it on a flat surface. He took that info and compared it to a stock head. I see you cant do that so double check that cam in your motor because its going to be tight.
#30
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Do things right and measure your PTV clearance with a checker spring. You don't need to pull the heads at all, just a valve spring. Which you will have to reshim your springs for a new cam anyways. I really do no think that cam is going to clear but hey good luck. With my 224 cam, .051" gaskets and .020" worth of milling on stock 243 heads I only had .068" intake valve clearance at 10 degrees BTDC. Stop throwing parts together and do things right. Scrap those heads, they don't work on your setup... A low compression 2.05" valve setup is not what you need.
#31
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Do things right and measure your PTV clearance with a checker spring. You don't need to pull the heads at all, just a valve spring. Which you will have to reshim your springs for a new cam anyways. I really do no think that cam is going to clear but hey good luck. With my 224 cam, .051" gaskets and .020" worth of milling on stock 243 heads I only had .068" intake valve clearance at 10 degrees BTDC. Stop throwing parts together and do things right. Scrap those heads, they don't work on your setup... A low compression 2.05" valve setup is not what you need.
I would definitely measure with a checker spring...
also that is with a 2.00 valve too...
going from 2.00 to 2.04 is around .005 less clearance