Cam-how big with stock pistons
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Originally Posted by calongo_SS
Depends if heads are milled, and valve sizes. The biggest cam available that I know of that will clear pistons w/stock heads w/o flycutting is the T-Rex from Thunder Racing. (242/248 .618/.602 110 lsa)
Brandon
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I talk to TSP a long time ago. It is not common but can happend if GM TQ you heads down to much tha the MS3 cam will be even closer than u think. You will have to check it. Trever told me that. You are going to need a dile indicator on a magent and some test springs. I would check it if i where u.
#5
you could have a bigger cam then the trex in a car , its just all about valve events. the "duration" and "lift" numbers dont mean near as much as the numbers that they dont show you thats why the comp 236 will NOT fit in a car without flycutting but the tr 242 will
the trex should be fine without cutting but just dont ever miss a shift. lol
mike
the trex should be fine without cutting but just dont ever miss a shift. lol
mike
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Originally Posted by goober35
I talk to TSP a long time ago. It is not common but can happend if GM TQ you heads down to much tha the MS3 cam will be even closer than u think. You will have to check it. Trever told me that. You are going to need a dile indicator on a magent and some test springs. I would check it if i where u.
Brandon
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Originally Posted by xfactor_pitbulls
I appreciate the info Goober. However I am putting on LS6 Heads shaved .030 off. So I am going to flycut anyways.
Brandon
Brandon
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just about everyone out there runs a cam and there some pretty giant cams out there. I got a tr224/224 and i got no problems, thast not a big cam but if it was as close as they say i wouln't even be able to run it.
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Just to give you an idea I run a 239/246 106lsa 106icl .651"/.613" Comp LSK/Comp XE-R cam on 5.3 litre heads cut .030" with 2.02"/1.60" valve and .090" valve reliefs I cut in my pistons. Clearence is right around the .060" or so range. I checked them with a checking spring to though. Remember, if you check with a checking spring you will get almost no valve train deflection which you will get with normal springs (thanks for the info Jason). I.E. if it clears with checking springs on the valves then it deffinately will clear with normal valve springs.
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Originally Posted by PREDATOR-Z
I wouldn't run a .050 PVC even if you promised to rebuild for free. Anything less than .100 is suicide on the street, especially on M6.
Brandon
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Question? Give me an idea of how you will notch the pistons? With the motor in the car still? Im wondering because this issue is keeping me from running the head/cam combo I want to. Thanks
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Originally Posted by NO5.0
Question? Give me an idea of how you will notch the pistons? With the motor in the car still? Im wondering because this issue is keeping me from running the head/cam combo I want to. Thanks
The only thing is you either need to have the valve seats removed from the head or have the carbide cutter machined to fit to make the cuts. If you do not do so the cuter will not fit in between the piston and the valve seat when you bolt the head down.