Help me ID this cam!!!
Thread Starter
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
Help me ID this cam!!! Hey guys, after days and days of searching i cannot find what the specs are on this cam, so i will see what you guys come up with...
Clearly it is a huge cam, the best i came up with is the .900BC on the end was bought up to a comp cam on summit racing, it said it was 258 260 @.050 with like a .648 lift on a 107 LSA but i though the E R was Erson Reher. Anyone here got any ideas? Or did i find the right grind info??? It is a nasty looking solid roller(which all usually are).
Thanks for any help.
Zane
Clearly it is a huge cam, the best i came up with is the .900BC on the end was bought up to a comp cam on summit racing, it said it was 258 260 @.050 with like a .648 lift on a 107 LSA but i though the E R was Erson Reher. Anyone here got any ideas? Or did i find the right grind info??? It is a nasty looking solid roller(which all usually are).
Thanks for any help.
Zane
Thread Starter
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
Well, this is what i found on summitracing.com
Brand: COMP Cams
Product Line: COMP Cams Oval Track Camshafts
Part Type: Camshafts
Cam Style: Mechanical roller tappet
Basic Operating RPM Range: 3,400-7,600
Intake Duration at 050 inch Lift: 259
Exhaust Duration at 050 inch Lift: 268
Duration at 050 inch Lift: 259 int./268 exh.
Advertised Intake Duration: 287
Advertised Exhaust Duration: 300
Advertised Duration: 287 int./300 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.648 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.645 in.
Valve Lift with Factory Rocker Arm Ratio: 0.648 int./0.645 exh. lift
Lobe Separation (degrees): 107
Intake Valve Lash: 0.016 in.
Exhaust Valve Lash: 0.020 in.
Computer Controlled Compatible: No
Grind Number: CS 287TKN-R7 .900BC
Quantity: Sold individually.
Camshaft, Mechanical Roller Tappet, Advertised Duration 287/300, Lift .648/.645, Chevy, Small Block, Each
See where it says grind number, it says .900BC. Guess this is my monster then. I thought it might be but since you pointed out it is a CC not a E then i guess it has to be, we will see how it acts in a street motor, my buddy had it in a 406 with a dominator and it idled at 1000RPM, i hope to idle it at 800 in my 408 i am building with a 750 carb till i get the 850. I really wonder how it will run. My buddy went 6.8 in the 1/8th with converter problems, i will be running a stick.
What you guys think? Am i dumb for trying to run this cam on the street? I dont care about the street manners, just want it to idle between 800-1000. It had a awesome throttle response.
Brand: COMP Cams
Product Line: COMP Cams Oval Track Camshafts
Part Type: Camshafts
Cam Style: Mechanical roller tappet
Basic Operating RPM Range: 3,400-7,600
Intake Duration at 050 inch Lift: 259
Exhaust Duration at 050 inch Lift: 268
Duration at 050 inch Lift: 259 int./268 exh.
Advertised Intake Duration: 287
Advertised Exhaust Duration: 300
Advertised Duration: 287 int./300 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.648 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.645 in.
Valve Lift with Factory Rocker Arm Ratio: 0.648 int./0.645 exh. lift
Lobe Separation (degrees): 107
Intake Valve Lash: 0.016 in.
Exhaust Valve Lash: 0.020 in.
Computer Controlled Compatible: No
Grind Number: CS 287TKN-R7 .900BC
Quantity: Sold individually.
Camshaft, Mechanical Roller Tappet, Advertised Duration 287/300, Lift .648/.645, Chevy, Small Block, Each
See where it says grind number, it says .900BC. Guess this is my monster then. I thought it might be but since you pointed out it is a CC not a E then i guess it has to be, we will see how it acts in a street motor, my buddy had it in a 406 with a dominator and it idled at 1000RPM, i hope to idle it at 800 in my 408 i am building with a 750 carb till i get the 850. I really wonder how it will run. My buddy went 6.8 in the 1/8th with converter problems, i will be running a stick.
What you guys think? Am i dumb for trying to run this cam on the street? I dont care about the street manners, just want it to idle between 800-1000. It had a awesome throttle response.
BC is Base Circle.
You might as well grind those numbers off and put a blindfold on when you install this cam.
Look at all the .900BC cams on COMPS WEBSITE.
THATS NOT A GRIND NUMBER.
Last edited by 8a8mfh; Jan 10, 2008 at 07:37 PM.
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From: North Bay, CA
4252 300-8 272 194 .440 .157 .139 .660 .704 .748
4213 308-8 280 201 .440 .185 .167 .660 .704 .748
HI-TORQUE .440" ROLLERS
These designs are very aggressive and can be used with a variety of rocker ratios. Smaller designs work well in oval track motors and larger designs work in drag racing applications. The Hi-Torque .440” designs are stable to 8200+ rpm.
.900BC = .900" Base Circle
Ground on a 108
4213 308-8 280 201 .440 .185 .167 .660 .704 .748
HI-TORQUE .440" ROLLERS
These designs are very aggressive and can be used with a variety of rocker ratios. Smaller designs work well in oval track motors and larger designs work in drag racing applications. The Hi-Torque .440” designs are stable to 8200+ rpm.
.900BC = .900" Base Circle
Ground on a 108
Last edited by machinistone; Oct 7, 2007 at 02:41 AM.
Yeah that base circle is tiny and I bet you will have problems idling it at 800 without upping your cr. I am considering tossing a 260/270 620/635 107lsa in my motor and I dont expect to get less than a 1100rpm idle. Good luck Zane.
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Thread Starter
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
4252 300-8 272 194 .440 .157 .139 .660 .704 .748
4213 308-8 280 201 .440 .185 .167 .660 .704 .748
HI-TORQUE .440" ROLLERS
These designs are very aggressive and can be used with a variety of rocker ratios. Smaller designs work well in oval track motors and larger designs work in drag racing applications. The Hi-Torque .440” designs are stable to 8200+ rpm.
.900BC = .900" Base Circle
Ground on a 108
4213 308-8 280 201 .440 .185 .167 .660 .704 .748
HI-TORQUE .440" ROLLERS
These designs are very aggressive and can be used with a variety of rocker ratios. Smaller designs work well in oval track motors and larger designs work in drag racing applications. The Hi-Torque .440” designs are stable to 8200+ rpm.
.900BC = .900" Base Circle
Ground on a 108
is .440 the lift before rockers right?
Will this cam work good on a 408, 11:1 compression with 230cc heads??
This is what i plan on, i want to make 600ish HP on the flywheel. I only want to go 7500 rpm or so, am i making a good choice? I am a excelent engine builder but i have never built anything to rev past 6500.
Thanks for the help guys, i am glad i posted this.
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Verdad Gallardo Thread Starter
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
This cam idled at 1000 with a dominator in the previous 406 it was in. I expect the same or better with a bit smaller carb. ONLY ONE WAY TO FIND OUT!!!
Thread Starter
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
Thread Starter
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
Mother of god, i think i will sell this cam and go with somthing smaller, that is WAYYYY to frikkin big. I don e think that can idle under 1000 if my life depended on it, prolly not below 1300. I really think no one has ever run a cam that big on the street. ****.
This is the cam for one of my customer's alcohol dragster 413 (0.060" over 400 SBC & 15.81:1 compression).
adv. duration ---310/312
@0.050"--------278/284
LSA-------------108
ICL-------------108
lift (after lash)--.682"/.645"
This motor idles at 900 rpm without trying to die and is quite happy to stay there!! In fact this is where he has his normal idle set.
oh yeah, my 355 LT1 SR cam is 282/288--253/259--.640"/.640"---108*+4*
adv. duration ---310/312
@0.050"--------278/284
LSA-------------108
ICL-------------108
lift (after lash)--.682"/.645"
This motor idles at 900 rpm without trying to die and is quite happy to stay there!! In fact this is where he has his normal idle set.
oh yeah, my 355 LT1 SR cam is 282/288--253/259--.640"/.640"---108*+4*
Peak HP is at 8200 rpm, but he has pleanty left to turn 9,000 rpm if he wanted to. With the class that he runs he normally shifts at 7800 rpm so that he doesn't break out of his bracket with too fast of a time slip. We designed this cam to be able to give him some extra rpm in case he needed it. My little LT1 makes peak HP at 7600 rpm, but hangs in there up to 8500.
What heads are you useing? Vehicle weight? Tranny type? Intake choice? Carb CFM? Exhaust system?
What heads are you useing? Vehicle weight? Tranny type? Intake choice? Carb CFM? Exhaust system?
Thread Starter
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
Well the 408 will be all forged of course, about 11 to 1, Dart pro 1 230cc heads, about 3300 or so with driver, T56 trans, performer RPM air gap, i have a 750 but the 408 will prolly get a 850, and the exhaust will be a set of full length hooker super comps. Also a 4.10 gear set.
I would use a Victor Jr. or Super Victor instead of the Air-gap.
Anyway here is a cam that would work well with your parts list:
Adv. Duration--286/294
@0.050" Dur.--260/268
LSA-----------111
ICL------------107
Lift w/1.5 rockers--.615"/.615"
Also if you can port the hell out of the exhaust side and just a bowl blend on the intake side with those heads.
Anyway here is a cam that would work well with your parts list:
Adv. Duration--286/294
@0.050" Dur.--260/268
LSA-----------111
ICL------------107
Lift w/1.5 rockers--.615"/.615"
Also if you can port the hell out of the exhaust side and just a bowl blend on the intake side with those heads.
Last edited by 1997bird; Oct 11, 2007 at 12:07 PM.