cnc d heads
#51
Not sure of the hours I have put on them. Valve train on old motors had 2.4 stainless valves it would tare up the intake lift ramps on camshaft. New builds are getting Titanium intake valves that have the Crn coating so camshaft will live and going with the .937 lifters and 55MM camshaft. My biggest problem is if you have a leaky header and don't know about it ****s stuff up.
#52
Platinum Member
Platinum Member
CT1542DML I never used this spring yet.
I ran the old comp cams spring it was 210 on the seat I think it was 2.000 spring height diameter was 1.560
I ran the old comp cams spring it was 210 on the seat I think it was 2.000 spring height diameter was 1.560
#53
#54
Platinum Member
Platinum Member
Dynoed with both heads, BB2 xtra made 1372 @6200. I never got a good pull with the CNC 1801 Big Duke only know I gained another 6 or so MPH.
And I was wrong about the cam, it was a Comp Cam 276/284 @.050 .782 lift.solid roller. Crower 68806 springs with the 2xtra's, 68848 and then Pac 1348 with the Big Duke.
And I was wrong about the cam, it was a Comp Cam 276/284 @.050 .782 lift.solid roller. Crower 68806 springs with the 2xtra's, 68848 and then Pac 1348 with the Big Duke.
The cam lift is that with lash?
#55
Platinum Member
Platinum Member
#57
#58
#59
Platinum Member
Platinum Member
Yes with a stainless valve you need big pressure. My big dukes have titanium just to help the other parts out.
#60