Here are my specs
75 Corvette
Floo-Tek AL Heads (let's assume they flow same as vortecs) 2.02 valves, 180cc intake runners
670 Street Avenger
Timing = ~24 initial / 36 total by ~2500
CR = 9.5:1
Performer RPM Intake
383 Scat rotating assy
2500 stall
gears = 2.73's
Current Cam - Muth thumpr cam flat tappet
@ .050 = 236 / 245 intake /exhaust
I posted many questions a while ago about my combo and you all were helpful. I have it running pretty good, but I know my gears are killing me and it fights the converter at idle even though this is the recommended stall speed from Comp. This was my first engine build, and I copied a hot rod engine build. Obviously, severly mismatched for my gears/stall.
?s:
1. I am thiking of going with maybe an XE268...maybe a Hydraulic roller this time. Will that get me back some bottom end I am missing with the thumpr? Is it still way to much cam for my gears? I am a little scared of too much DCR if I go down to something like the 262. I would think even the 268 would have to be much better than what I currently have?
2. I am a little scared about my internal clearances if I change cams. I made sure when I installed the thumpr that I had at least .050 everywhere. I thought maybe with the smaller lift cam I would be OK, but not sure about the larger LSA of the xe268 and how that will affect things?
3. Do I just need to suck it up and change gears!
Any thoughts would be appreciated.
75 Corvette
Floo-Tek AL Heads (let's assume they flow same as vortecs) 2.02 valves, 180cc intake runners
670 Street Avenger
Timing = ~24 initial / 36 total by ~2500
CR = 9.5:1
Performer RPM Intake
383 Scat rotating assy
2500 stall
gears = 2.73's
Current Cam - Muth thumpr cam flat tappet
@ .050 = 236 / 245 intake /exhaust
I posted many questions a while ago about my combo and you all were helpful. I have it running pretty good, but I know my gears are killing me and it fights the converter at idle even though this is the recommended stall speed from Comp. This was my first engine build, and I copied a hot rod engine build. Obviously, severly mismatched for my gears/stall.
?s:
1. I am thiking of going with maybe an XE268...maybe a Hydraulic roller this time. Will that get me back some bottom end I am missing with the thumpr? Is it still way to much cam for my gears? I am a little scared of too much DCR if I go down to something like the 262. I would think even the 268 would have to be much better than what I currently have?
2. I am a little scared about my internal clearances if I change cams. I made sure when I installed the thumpr that I had at least .050 everywhere. I thought maybe with the smaller lift cam I would be OK, but not sure about the larger LSA of the xe268 and how that will affect things?
3. Do I just need to suck it up and change gears!
Any thoughts would be appreciated.