Milled Heads to .050". What cam size can be ran?
08-02-2005, 07:27 AM
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Milled Heads to .050". What cam size can be ran? OK guys.
Currently I am using the MTI B1 cam. I went ahead and got the stage 2 ported heads milled .050". I also have the 2.020 Manley Valves.
My car has a 3200 stall, free mods, Mid length headers and off road Y pipe into a bullet muffler. With stock heads and intake it put down 340/350 through the auto and stall.
I milled the heads with the intention of just upping the compression and leaving the B1 cam alone. But if I choose to go with a different cam..... What is the largest I can go with now that the heads are milled .050"???
Thanks.......
Currently I am using the MTI B1 cam. I went ahead and got the stage 2 ported heads milled .050". I also have the 2.020 Manley Valves.
My car has a 3200 stall, free mods, Mid length headers and off road Y pipe into a bullet muffler. With stock heads and intake it put down 340/350 through the auto and stall.
I milled the heads with the intention of just upping the compression and leaving the B1 cam alone. But if I choose to go with a different cam..... What is the largest I can go with now that the heads are milled .050"???
Thanks.......
08-02-2005, 09:22 AM
#2
With that much milling and 2.02" intakes valves, defiantely check the piston to valve clearance. Guessing off the top of my head, without valve reliefs in the pistons, I would not go higher than about 218 duration and 550ish lift. With valve reliefs you could go about 224 to 228 and about 570ish lift.
Keith
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08-10-2005, 02:27 PM
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My buddy ran the exact same cam with the same mill job on the heads and ran some very impressive times. Higher compression and better throttle response times.
We milled so much to get some high compression for motor and Nitrous as well. I had no intentions of changing to a more agressive cam so we wanted to get the most out of car we could without going to a bigger cam.
I was just looking for advice on how big the cam COULD be if we were to change it later. Thanks and keep the input coming
We milled so much to get some high compression for motor and Nitrous as well. I had no intentions of changing to a more agressive cam so we wanted to get the most out of car we could without going to a bigger cam.
I was just looking for advice on how big the cam COULD be if we were to change it later. Thanks and keep the input coming
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08-11-2005, 08:04 AM
#8
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Mill less and run thinner gasket. That is the way to go. Same results but with more flow on head and tighter quench > better flame travel and less detonation potential.
08-11-2005, 10:24 AM
#9
Originally Posted by mikecobra95
OK guys.
Currently I am using the MTI B1 cam. I went ahead and got the stage 2 ported heads milled .050". I also have the 2.020 Manley Valves.
My car has a 3200 stall, free mods, Mid length headers and off road Y pipe into a bullet muffler. With stock heads and intake it put down 340/350 through the auto and stall.
I milled the heads with the intention of just upping the compression and leaving the B1 cam alone. But if I choose to go with a different cam..... What is the largest I can go with now that the heads are milled .050"???
Thanks.......
Currently I am using the MTI B1 cam. I went ahead and got the stage 2 ported heads milled .050". I also have the 2.020 Manley Valves.
My car has a 3200 stall, free mods, Mid length headers and off road Y pipe into a bullet muffler. With stock heads and intake it put down 340/350 through the auto and stall.
I milled the heads with the intention of just upping the compression and leaving the B1 cam alone. But if I choose to go with a different cam..... What is the largest I can go with now that the heads are milled .050"???
Thanks.......
how I know:
I did a TR224/224 112LSA with heads that were 2.08/1.60 valve and milled 0.050"........still had about 0.180" clearance......no piston relief’s......
on the mill hurting your flow.......if the valve area of the chamber is deshrouded like it should be you will only stand to gain..........compression is a good thing........set your quench at ~0.045" and go......... 
08-11-2005, 10:31 AM
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on one of our shop cars i had 5.3 heads milled .055 and had a 2.02/1.57 valve combo with a 232/238 .574 .586 on a 110 and had about .010 interferance. not going to help you much but just to give you an idea
08-11-2005, 10:38 AM
#11
Originally Posted by Demon SS
on one of our shop cars i had 5.3 heads milled .055 and had a 2.02/1.57 valve combo with a 232/238 .574 .586 on a 110 and had about .010 interferance. not going to help you much but just to give you an idea
what valve was close....exhaust/intake or both?
08-11-2005, 10:49 AM
#12
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Originally Posted by 2001CamaroGuy
you WILL get a TR224/224 112LSA in there....probably even a TR230/224 size.........
how I know:
I did a TR224/224 112LSA with heads that were 2.08/1.60 valve and milled 0.050"........still had about 0.180" clearance......no piston relief’s......
on the mill hurting your flow.......if the valve area of the chamber is deshrouded like it should be you will only stand to gain..........compression is a good thing........set your quench at ~0.045" and go.........
how I know:
I did a TR224/224 112LSA with heads that were 2.08/1.60 valve and milled 0.050"........still had about 0.180" clearance......no piston relief’s......
on the mill hurting your flow.......if the valve area of the chamber is deshrouded like it should be you will only stand to gain..........compression is a good thing........set your quench at ~0.045" and go......... 
Please ask any head porter if milling reduces flow (ANY).
.045 quench is stock quench (graphite gasket .054), .001 less actualy.
a tight quench is .030>.035, medium .035>.040
08-11-2005, 10:59 AM
#13
Originally Posted by PREDATOR-Z
Dude, did you take your medication today?
Please ask any head porter if milling reduces flow (ANY).
.045 quench is stock quench (graphite gasket .054), .001 less actualy.
a tight quench is .030>.035, medium .035>.040
Please ask any head porter if milling reduces flow (ANY).
.045 quench is stock quench (graphite gasket .054), .001 less actualy.
a tight quench is .030>.035, medium .035>.040
......nahhh....loaded up on the full bottle this morning............I have seen direct tests where mill makes no difference as long as the valve is not shrouded by either the chamber or cylinder wall..........
0.030" is ideal (I'm running about ~0.032" HOT quench) but my reasoning for saying 0.045" is it provides extra room for carbon buildup that is bound to occur on the unpolished/uncoated stock piston crown and quench pad of the head......it also takes into account any potential rod (which are probably stock I'm guessing) stretch......
Last edited by 2001CamaroGuy; 08-11-2005 at 11:08 AM.
08-11-2005, 11:09 AM
#14
TECH Senior Member
Properly tuned, there is less carbon buildup because of better combustion. So that is not an issue.
Street setups .033>.038 is really good, don't forget LSx chambers are very efficient.
I've seen .027 on full race , high SCR setups.
Street setups .033>.038 is really good, don't forget LSx chambers are very efficient.
I've seen .027 on full race , high SCR setups.
08-11-2005, 01:20 PM
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Originally Posted by 2001CamaroGuy
you WILL get a TR224/224 112LSA in there....probably even a TR230/224 size.........
how I know:
I did a TR224/224 112LSA with heads that were 2.08/1.60 valve and milled 0.050"........still had about 0.180" clearance......no piston relief’s......
on the mill hurting your flow.......if the valve area of the chamber is deshrouded like it should be you will only stand to gain..........compression is a good thing........set your quench at ~0.045" and go.........
how I know:
I did a TR224/224 112LSA with heads that were 2.08/1.60 valve and milled 0.050"........still had about 0.180" clearance......no piston relief’s......
on the mill hurting your flow.......if the valve area of the chamber is deshrouded like it should be you will only stand to gain..........compression is a good thing........set your quench at ~0.045" and go......... My MTI B1 cam is 221/221 114 LSA and .558/.558 lift.
I would only go bigger if it for sure will not cause clearance issues and it will be a well worth it gain. My end combo will be this.....
Stage 2 heads, 2.02/1.57 valves milled 0.050". MTI B1 cam, LS6 intake, MAC midlength and off road Y, Lid, Free mods, 3200 stall. Nothing too crazy, but well enough.
Car will be apart anyway, if I can squeeza a nicer cam in there, I will. If not, I know my trusty B1 cam will work just fine. thanks for all the advice....
08-11-2005, 02:16 PM
#17
Originally Posted by mikecobra95
Thanks for the good info. I am runnign the 2.02 / 1.57 valve combo. I ordered the shorter pushrods today, so I still have a week or so before I decide wether or not to go with a bigger cam.
My MTI B1 cam is 221/221 114 LSA and .558/.558 lift.
I would only go bigger if it for sure will not cause clearance issues and it will be a well worth it gain. My end combo will be this.....
Stage 2 heads, 2.02/1.57 valves milled 0.050". MTI B1 cam, LS6 intake, MAC midlength and off road Y, Lid, Free mods, 3200 stall. Nothing too crazy, but well enough.
Car will be apart anyway, if I can squeeza a nicer cam in there, I will. If not, I know my trusty B1 cam will work just fine. thanks for all the advice....
My MTI B1 cam is 221/221 114 LSA and .558/.558 lift.
I would only go bigger if it for sure will not cause clearance issues and it will be a well worth it gain. My end combo will be this.....
Stage 2 heads, 2.02/1.57 valves milled 0.050". MTI B1 cam, LS6 intake, MAC midlength and off road Y, Lid, Free mods, 3200 stall. Nothing too crazy, but well enough.
Car will be apart anyway, if I can squeeza a nicer cam in there, I will. If not, I know my trusty B1 cam will work just fine. thanks for all the advice....
08-13-2005, 12:53 AM
#18
Originally Posted by ls1290
With that much milling and 2.02" intakes valves, defiantely check the piston to valve clearance. Guessing off the top of my head, without valve reliefs in the pistons, I would not go higher than about 218 duration and 550ish lift. With valve reliefs you could go about 224 to 228 and about 570ish lift.
Keith
Keith
