Sorry, this is not a Comp build, just a weekly bracket engine question. I have a 421 SBC with Pro Action 14 degree heads just refreshed by Ron's. Made about 780 hp last year with an out of the box Comp Cams grind. Who can I talk to at Comp Cams, or any other cam company that can help me get 2 hp per ci? I know that if I just call their tech lines I may get a kid crunching numbers in a program, so I'd like to speak to someone with experience. Thanks in advance for advice and phone and ext. numbers if possible.
Cam question
- Thread starter Supernova
- Start date
Cam
Chris. Paget at comp. Him and Al Parker designed a cam for a 358 14 degree for a tractor puller that is in excess of 2 hp per cube.
Chris. Paget at comp. Him and Al Parker designed a cam for a 358 14 degree for a tractor puller that is in excess of 2 hp per cube.
Cam
Hey Clevo,
You know better than that! You never get the straight answer on what is being run. There is always a sales pitch.
I do know that there are quite a few winning engines at Engine Masters Challenge that run Comp. Why. Because it is part of my Tech Job to check the parts on their contingency sheets. I copy the Serial # off the cam for verification with Comp.
Call Tim Cole.
His direct toll free # is 877-735-7387
If you can't get through on that line the Swithboard # is 901-795-2400
Ask for Tim Cole
BTY: Some of those guys on the Cam Help line are racers and pretty sharp. You just have to get the right one.
You can get good cams and information at Bullet, too. 662-893-5670
Good luck
Adger Smith
Hey Clevo,
You know better than that! You never get the straight answer on what is being run. There is always a sales pitch.
I do know that there are quite a few winning engines at Engine Masters Challenge that run Comp. Why. Because it is part of my Tech Job to check the parts on their contingency sheets. I copy the Serial # off the cam for verification with Comp.
Call Tim Cole.
His direct toll free # is 877-735-7387
If you can't get through on that line the Swithboard # is 901-795-2400
Ask for Tim Cole
BTY: Some of those guys on the Cam Help line are racers and pretty sharp. You just have to get the right one.
You can get good cams and information at Bullet, too. 662-893-5670
Good luck
Adger Smith
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What RPM range are you running the motor at? What journal size, lifter wheel size? Where does it make peak HP & Torque now? How much Compression ratio, rocker ratio?
Sorry I didn't see your reply till now Craig.
I have tried shifting from 7200-7800. Not much et difference. Am currently at 7600. Going thru traps at 7500 with 5.29 gear and 6400 stall.
The cam is .900 BC on standard SBC journals.
Lifters are Crowers .842 with a .750 wheel.
I haven't had it on a dyno.
It is 15:1 compression. 38cc heads with a -12cc piston.
1.8's on intake and 1.7 on exhaust.
It has a Hogan's single 4bbl. T/R.
I made my first passes this year last night. Last year used a Ron's Terminator FI and best was 5.75 at 118mph.
This year I have a Methanol 1050 Dominator and last night best was 5.91 at 114 in 90% humidity. I run 1/8th mile only. Car is 2860 with me.
Ron Winterhoff said heads were in good shape and flow over 400cfm.
Cam is a Comp Cams 312R8.
108lsa 108IC
Int Lobe: 1614N…279 @ .050
196 @ .200
312 @ .020
Lobe lift .453 Total lift .815
Exh Lobe: 1267N…286 @ .050
198 @ .200
325 @ .020
Lobe lift .431 Total lift .733
I was hoping that after Ron refreshened the heads that it would pick up. He replaced some seats and guides and said that's all that was wrong with them.
Ive tried timing from 28 to 36. Best et was at 35 I didn't think small efficient cylinders like that much timing?
This thing is down on power, and I don't know where to look other than the cam. The cam quotes that I have got so far are not far off what I have now.
Do you have any suggestions?.................ANYBODY?
I have tried shifting from 7200-7800. Not much et difference. Am currently at 7600. Going thru traps at 7500 with 5.29 gear and 6400 stall.
The cam is .900 BC on standard SBC journals.
Lifters are Crowers .842 with a .750 wheel.
I haven't had it on a dyno.
It is 15:1 compression. 38cc heads with a -12cc piston.
1.8's on intake and 1.7 on exhaust.
It has a Hogan's single 4bbl. T/R.
I made my first passes this year last night. Last year used a Ron's Terminator FI and best was 5.75 at 118mph.
This year I have a Methanol 1050 Dominator and last night best was 5.91 at 114 in 90% humidity. I run 1/8th mile only. Car is 2860 with me.
Ron Winterhoff said heads were in good shape and flow over 400cfm.
Cam is a Comp Cams 312R8.
108lsa 108IC
Int Lobe: 1614N…279 @ .050
196 @ .200
312 @ .020
Lobe lift .453 Total lift .815
Exh Lobe: 1267N…286 @ .050
198 @ .200
325 @ .020
Lobe lift .431 Total lift .733
I was hoping that after Ron refreshened the heads that it would pick up. He replaced some seats and guides and said that's all that was wrong with them.
Ive tried timing from 28 to 36. Best et was at 35 I didn't think small efficient cylinders like that much timing?
This thing is down on power, and I don't know where to look other than the cam. The cam quotes that I have got so far are not far off what I have now.
Do you have any suggestions?.................ANYBODY?
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Looks to me like your cam is quite a bit smaller than I would expect for that size engine. Have lots of experience w/ 406 & bigger sbc including 434 pro action head engine. I would suggest something around 285 intake & 300 exhaust duration with .800 lift on a 112-114 lsa. And spin it to 8500 to get max power.
Thanks Todd. that's the kind of information I'm looking for. I e-mailed Tim Cole at Comp to get some direction from him also.
Thanks to all that have offered advice thus far.
Let me restate what these heads are:
They are the old PRO ACTION Aluminum 14 degree heads. Not the RHS CAST IRON heads.
This is my weekly Bracket Racing car. I want the engine to make 2hp per CI, but be easy on springs, as in 1 set per year.
At this point I'm not sure if I have a camshaft mismatch or some other problem. I still think that it is .2 slow from were it should be.
Could the Hogan's tunnel ram have too much plenum? I currently have 1 Methanol 1050 Dominator on it.
Pro Actions as cast flow numbers on the heads are as follows:
Intake .100 -76.56 Exhaust .100 -61.16
.200 -158.60 .200 -117.11
.300 -230.59 .300 -172.59
.400 -298.64 .400 -220.00
.500 -343.87 .500 -251.29
.600 -373.42 .600 -265.52
.700 -393.57 .700 -275.95
.800 -396.2 .800 -276.8
My heads were originally built and ported by Ron Winterhoff, and I would guess that his numbers would be better.
Let me restate what these heads are:
They are the old PRO ACTION Aluminum 14 degree heads. Not the RHS CAST IRON heads.
This is my weekly Bracket Racing car. I want the engine to make 2hp per CI, but be easy on springs, as in 1 set per year.
At this point I'm not sure if I have a camshaft mismatch or some other problem. I still think that it is .2 slow from were it should be.
Could the Hogan's tunnel ram have too much plenum? I currently have 1 Methanol 1050 Dominator on it.
Pro Actions as cast flow numbers on the heads are as follows:
Intake .100 -76.56 Exhaust .100 -61.16
.200 -158.60 .200 -117.11
.300 -230.59 .300 -172.59
.400 -298.64 .400 -220.00
.500 -343.87 .500 -251.29
.600 -373.42 .600 -265.52
.700 -393.57 .700 -275.95
.800 -396.2 .800 -276.8
My heads were originally built and ported by Ron Winterhoff, and I would guess that his numbers would be better.
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The main problem with your combination is the methanol. Get a good carb. and tune it up with Q-16 and it will pick up. Good engines like this need gas.
14 deg camshaft
David:
Did you ever got your engine combo straightened out ?
We have a 409 with the 14 deg Pro Action 265cc heads that were CNC'd from Pro Action that made the following on our dyno.
620 ft-lbs torque @6500
788 hp @ 7300
This was on VP113 fuel at 13 to 1 compression.
The cam in that engine was an LSM grind 282/292 .800/.775 113 LSA.
Slick Rick has the heads now for some porting modifications to give it enough area to peak at 7800 rpm.
Let's us know if you need some dyno time to get this sorted out.
Chris Cobb
DynoTune Engineering
731-697-4913
www.dynotuneengineering.com
David:
Did you ever got your engine combo straightened out ?
We have a 409 with the 14 deg Pro Action 265cc heads that were CNC'd from Pro Action that made the following on our dyno.
620 ft-lbs torque @6500
788 hp @ 7300
This was on VP113 fuel at 13 to 1 compression.
The cam in that engine was an LSM grind 282/292 .800/.775 113 LSA.
Slick Rick has the heads now for some porting modifications to give it enough area to peak at 7800 rpm.
Let's us know if you need some dyno time to get this sorted out.
Chris Cobb
DynoTune Engineering
731-697-4913
www.dynotuneengineering.com
Cam
I'd say they are right on the cam, but also, don't be afraid to put a lower gear in that thing, and remember, wrong carb, wrong et.
I'd say they are right on the cam, but also, don't be afraid to put a lower gear in that thing, and remember, wrong carb, wrong et.
