Good cam needed, please help.....
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
Good cam needed, please help.....
I am looking for a good street cam with a lot of power, but also good for cruising. My car is a 1969 Corvette with a 1969 SB 11:1 engine, with 4 speed transmission. I do have Brodix IK180 heads, Rocker arms 1,6, Comp Cams lifters (853-16), headers + 2½" exhaust.
Please help me with a good Comp Cam.
Please help me with a good Comp Cam.
Pro
Joined: Nov 2009
Posts: 684
Likes: 0
From: Alberta
If you haven't already done so, why not download the cam selection software from their website, and go from there. It's kinda interesting........
http://compcams.com/camquest/default.asp
http://compcams.com/camquest/default.asp
Last edited by 10caipirinhas; Feb 23, 2010 at 12:03 PM.
Instructor
Joined: Jan 2006
Posts: 228
Likes: 1
From: Warwick New York
I have had good luck with Crower cams (roller hydrolic) they have a spec sheet on line that you can fill out with all your specs and they will calculate the cam you need. A lot of guys along with my son in law on the camaro forum swear by them. I have a 10 to1 406 with AFR 195s and duel 4 600s with a 6 speed behind it and 373s in the rear this is the cam i picked. only got about 2000 miles on it but is runs great with more power then I will ever need.
#00470S 2400-5800 rpm 462hp @ 5800 rpm
110 - 232/240 .549"/.559" (the one I picked)
#00470S 2400-5800 rpm 462hp @ 5800 rpm
110 - 232/240 .549"/.559" (the one I picked)
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
If you haven't already done so, why not download the cam selection software from their website, and go from there. It's kinda interesting........
http://compcams.com/camquest/default.asp
http://compcams.com/camquest/default.asp
Thanks....
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
I have had good luck with Crower cams (roller hydrolic) they have a spec sheet on line that you can fill out with all your specs and they will calculate the cam you need. A lot of guys along with my son in law on the camaro forum swear by them. I have a 10 to1 406 with AFR 195s and duel 4 600s with a 6 speed behind it and 373s in the rear this is the cam i picked. only got about 2000 miles on it but is runs great with more power then I will ever need.
#00470S 2400-5800 rpm 462hp @ 5800 rpm
110 - 232/240 .549"/.559" (the one I picked)
#00470S 2400-5800 rpm 462hp @ 5800 rpm
110 - 232/240 .549"/.559" (the one I picked)
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
I am running the Edelbrock Performer RPM signature cam, on a rear wheel dyno, I am at ~436tq and ~450hp.... my build otherwise is similar to yours. its a 383 stroker, and the cam runs VERY strong all the way up and through 6500 rpm.... after the new beehive springs!!.... Vacuum though is about 11" and may give you brake problems???/
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Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
You have to do your own leg work and research... ask questions, and listen... and then make an educated... decision
Pro
Joined: Apr 2009
Posts: 650
Likes: 1
C3_dk,
I'm running a Comp Cams 280XFI in my QuickFuel Carburated 383. 1.6 on the exhaust and 1.5 on the intake, Dart Pro1 heads. I still need to work some things out on the QF Carb, but the car runs strong and I'm pulling 15 hg's of vacuum at idle.
I'm running a Comp Cams 280XFI in my QuickFuel Carburated 383. 1.6 on the exhaust and 1.5 on the intake, Dart Pro1 heads. I still need to work some things out on the QF Carb, but the car runs strong and I'm pulling 15 hg's of vacuum at idle.
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
Thanks all........
I do have a brand new Comp Cams 12-466-8, will that work?
http://www.compcams.com/Cam_Specs/Ca...?csid=175&sb=2
I do have a brand new Comp Cams 12-466-8, will that work?
http://www.compcams.com/Cam_Specs/Ca...?csid=175&sb=2
Last edited by c3_dk; Feb 25, 2010 at 12:13 PM.
Pro
Joined: Apr 2009
Posts: 650
Likes: 1
Hi,
I don't know how streetable 11:1 compression will be, but I don't think you would be taking full advantage of your current platform if you use this cam. If you lowered the compression ratio a little with some dish pistons or larger cc head, then that cam would be a good one for the street and would mimic your original request of being streetable and a decent performer. The cool thing about Comp Cams Fuel Injection line is they produce more vacuum in addition to good power even on carburated motors.
I don't know how streetable 11:1 compression will be, but I don't think you would be taking full advantage of your current platform if you use this cam. If you lowered the compression ratio a little with some dish pistons or larger cc head, then that cam would be a good one for the street and would mimic your original request of being streetable and a decent performer. The cool thing about Comp Cams Fuel Injection line is they produce more vacuum in addition to good power even on carburated motors.
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
its got a good lift but the duration is short.... 11:1 is ok with aluminum heads, but 10.5:1 max on iron,,, still think you should take a look at the Edelbrock roller RPM cam, it has a lot more duration which will give you more HP.... Also the RPM cam runs 1500-6500, and the comp runs 1800-5800..... Also increasing rocker geometry, such as going from 1.5 to 1.6 can ware valve guides much more rapidly, the edelbrock signatures has more lift then the RPM and you can stay with 1.5.... just mho...
Last edited by pauldana; Feb 25, 2010 at 07:47 PM.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Thanks all........
I do have a brand new Comp Cams 12-466-8, will that work?
http://www.compcams.com/Cam_Specs/Ca...?csid=175&sb=2
I do have a brand new Comp Cams 12-466-8, will that work?
http://www.compcams.com/Cam_Specs/Ca...?csid=175&sb=2
It is a lot of lift with 1.6 rockers. The XE288 HR might work. It is the next size smaller but your 1.6 rockers would bump the duration up about 3 degrees. If you go with it you need to order it with a wider LSA 112 or 114 to help idle, widen the powerband and keep you out of detonation trouble. Hard to get an off the shelf hydraulic roller for that much compression. Cams for that much compression are higher rpm cams and the Hydraulic rollers with their heavier lifters run into valve float issues @ 6000 to 6500 RPM unless you have a rev kit. lightweight valvetrain components, beehive springs or a combination of the above.
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
That won't work. You will detonate the pistons right out of the cylinders on pump gas. If you have a true 11 to 1 you need 240 duration @ .050 on the intake to run pump gas period. This cam will work. http://www.compcams.com/Cam_Specs/Ca...?csid=162&sb=2
It is a lot of lift with 1.6 rockers. The XE288 HR might work. It is the next size smaller but your 1.6 rockers would bump the duration up about 3 degrees. If you go with it you need to order it with a wider LSA 112 or 114 to help idle, widen the powerband and keep you out of detonation trouble. Hard to get an off the shelf hydraulic roller for that much compression. Cams for that much compression are higher rpm cams and the Hydraulic rollers with their heavier lifters run into valve float issues @ 6000 to 6500 RPM unless you have a rev kit. lightweight valvetrain components, beehive springs or a combination of the above.
It is a lot of lift with 1.6 rockers. The XE288 HR might work. It is the next size smaller but your 1.6 rockers would bump the duration up about 3 degrees. If you go with it you need to order it with a wider LSA 112 or 114 to help idle, widen the powerband and keep you out of detonation trouble. Hard to get an off the shelf hydraulic roller for that much compression. Cams for that much compression are higher rpm cams and the Hydraulic rollers with their heavier lifters run into valve float issues @ 6000 to 6500 RPM unless you have a rev kit. lightweight valvetrain components, beehive springs or a combination of the above.
hey... this is the guy to listen to... I went throught a spring issue, and he is like... on top of it thx again 63mako!! those beehives are the fraken bomb!!!! still need to look at the RPM.. duration 234 238
Last edited by pauldana; Feb 25, 2010 at 11:04 PM.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
The RPM would work but you need to close the intake valve sooner to reduce cylinder pressure, Install advanced 4 degrees would do it and lower peak torque RPM. The 112 duration will help too. Might be a good option. Interesting reading here.[url]http://compcams.com/technical/FAQ/LSAproperties.asp[/url
With the lift numbers you are going to be at and installing advanced you really have to be careful on piston to valve clearance.
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
Haven't gone back to Cms for there dyno run but did run it at R&E and yea... ran all the way up.. there dyno is an inertia dyno and gives lower readings then CMS's braking dyno numbers I posted, but I will be revisiting CMS in the next 6-8 weeks for another dyno and will post the numbers on the old thread, but if I go by the inertia dyno, I should be about 440tq and 460hp at he rear wheels, up over 50hp.... it is amazing, it pulls all the way through 6500RPM....buddy has a pretty modded 3rd gen rx7 twin turbo... took a ride with me and he said he could not believe how hard it pulls and just keeps pulling.... burn rubber all the way through 1st, and hard to hold down through 2nd... thx again!!!! 
beehives rule!
beehives rule!
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
That won't work. You will detonate the pistons right out of the cylinders on pump gas. If you have a true 11 to 1 you need 240 duration @ .050 on the intake to run pump gas period. This cam will work. http://www.compcams.com/Cam_Specs/Ca...?csid=162&sb=2
It is a lot of lift with 1.6 rockers. The XE288 HR might work. It is the next size smaller but your 1.6 rockers would bump the duration up about 3 degrees. If you go with it you need to order it with a wider LSA 112 or 114 to help idle, widen the powerband and keep you out of detonation trouble. Hard to get an off the shelf hydraulic roller for that much compression. Cams for that much compression are higher rpm cams and the Hydraulic rollers with their heavier lifters run into valve float issues @ 6000 to 6500 RPM unless you have a rev kit. lightweight valvetrain components, beehive springs or a combination of the above.
It is a lot of lift with 1.6 rockers. The XE288 HR might work. It is the next size smaller but your 1.6 rockers would bump the duration up about 3 degrees. If you go with it you need to order it with a wider LSA 112 or 114 to help idle, widen the powerband and keep you out of detonation trouble. Hard to get an off the shelf hydraulic roller for that much compression. Cams for that much compression are higher rpm cams and the Hydraulic rollers with their heavier lifters run into valve float issues @ 6000 to 6500 RPM unless you have a rev kit. lightweight valvetrain components, beehive springs or a combination of the above.
It is the factory 1969 L46 engine I have in my car. But to be honest I dont know what compression will be with my Brodix IK180 heads, can anyone help here?
But what I would like to have, is a fast street car, but also for crusing with the kids.
BR,
John