Cam spec ?
Thread Starter
Pro
Joined: Jul 2001
Posts: 704
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From: Blairsville Ga
Cam spec ?
I have this cam in my car now it is WG1158 – 266/266, 209/209, .414”/.414”, 110/108. Is this a good cam for my engine. The engine is a 355, edelbrock performer RPM heads, RPM intake and Holley 750 carb. This was the cam that came with my rebuild kit before I added the heads intake and carb. Now I think I need a better cam? Opinions please
Thanks
Scott
Thanks
Scott
Last edited by shamby; Apr 17, 2010 at 09:04 PM.
Pro
Joined: Dec 2006
Posts: 694
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From: tx
Well, some of the components you've bought don't match up very well. What is your intended purpose? Smooth running with some power? A little lumpy with good, broad power band? Smooth idle and factory power?
Where you are at from my vantage point - The intake will help produce power up to around 5,500rpms. The heads are great for street applications. The carb is too big for the cubic inches unless you are ***** to the walls hammering on it all the time (vacuum or mechanical secondaries). A 625-650cfm carb would be better. The camshfat you have now will provide a smooth idle and a low power band. I didn't look it up, but you'll be in the neighborhood of no roughness at idle and fair power from idle to 5,000rpm. It is always best to determine what you want from the motor and then buy components that match up with the answer to that question. I'd be happy to help you further if you have in mind you're end goal.
G
Where you are at from my vantage point - The intake will help produce power up to around 5,500rpms. The heads are great for street applications. The carb is too big for the cubic inches unless you are ***** to the walls hammering on it all the time (vacuum or mechanical secondaries). A 625-650cfm carb would be better. The camshfat you have now will provide a smooth idle and a low power band. I didn't look it up, but you'll be in the neighborhood of no roughness at idle and fair power from idle to 5,000rpm. It is always best to determine what you want from the motor and then buy components that match up with the answer to that question. I'd be happy to help you further if you have in mind you're end goal.
G
Thread Starter
Pro
Joined: Jul 2001
Posts: 704
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From: Blairsville Ga
Thanks’ for the reply glackore. I'm looking for a little lumpy with good broad band power. I was concerned about the carb being to big, but summit racing sized it for me about 10 years ago. I guess that was when people thought that bigger was better. The car is really going to be a Sunday driver so streetability is not a big concern but I don't want anything outrageous. Edelbrock suggest there 7102 cam to go with their heads and intake it's numbers are Duration 308/318, Lift .488/.510. I have always been under the impression that you should not go over .5 on the lift without modifications. Edelbrock also suggest their 800cfm carb which is huge in my opinion.
I like the out of the hole power. I perfer 0-60 more then 60-120. I don't see me doing any high speed driving in this car.
I was wrong on my intake, It's a Weind Stealth intake, not sure if there is that big of a difference between the two.
By the way my carb is vacuum secondary.
Thanks
I like the out of the hole power. I perfer 0-60 more then 60-120. I don't see me doing any high speed driving in this car.
I was wrong on my intake, It's a Weind Stealth intake, not sure if there is that big of a difference between the two.
By the way my carb is vacuum secondary.
Thanks
Last edited by shamby; Apr 18, 2010 at 08:23 AM.
Instructor
Joined: Jun 2008
Posts: 102
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From: Coldbrook Nova Scotia
Those two cams are night and day.....The one you have now looks to be a factory low lift/duration cam,This cam will have a smooth idle and work with any convertor or rear gears,however it will run out of steam around 4800-5000rpm,s.This will not compliment the new heads and intake.However looking at the other (much larger) camshaft you will get an agressive exhaust tone and a lopey idle,you will move the tourque curve up higher in the rpm range,the result will be increased horsepower and higher rpm,s..The larger cam could cause a few problems making it a real dog..High rear gear 3.08s or lower (likely need a 3.50 or higher)Engine compression lower than 9.0 to 1 (recommends 9.5) And if you have the factory convertor (requires a higher stall for this cam) if you have a stick disregard the convertor.the camshaft is the brain of the engine and with matched parts a bigger cam is pure bliss ,unfortunately most people put the biggest cam (the one at the bottom of the page) and the car runs worse than when it was stock.Good luck...
Thread Starter
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Joined: Jul 2001
Posts: 704
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From: Blairsville Ga
I've got a TCI Saturday night special converter, which operating range is 1600 to 1800 and my rear end is a 373. My transmission is a TH400. Not sure on my compression. I'm going to assume 9 to 1.
I've got to much money in the top end to screw it up with a bad cam choice. I know the one I have now needs to go and now is the time to do it since the radiator is out. Decisions Decisions.
Thanks
I've got to much money in the top end to screw it up with a bad cam choice. I know the one I have now needs to go and now is the time to do it since the radiator is out. Decisions Decisions.
Thanks
Thread Starter
Pro
Joined: Jul 2001
Posts: 704
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From: Blairsville Ga
Dang, I figured you would get more HP with those heads. Edelbrock's numbers for the RPM kit is 410. I know that is not realistic, but I figured around 325 to 350 at the wheels. Was you happy with your dyno numbers?
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Race Director
Joined: Dec 1999
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From: Sierra Foothills CA
That cam is a good compromise between the two others mentioned and should give you what you want....but Ganey, can you quit blabbing and just keep it short next time?!?!? 
Pro
Joined: Dec 2006
Posts: 694
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From: tx
Hey Shamby, based on the additonal input (carb w/vac secondares, gear ratio, convertor, dual plane intake, etc.) I'd go with the Comp Cam at this link:
http://www.compcams.com/Cam_Specs/Ca...x?csid=73&sb=2
It was referenced by another post (Extreme Energy 268H). This should work well with your components. Just don't change your mind. Your rwhp should be between 275-325. That's about as good as it's gonna get and should work well for you on the street.
Don't get wrapped up in the "rwhp" thing, unless someone has a dyno sheet, it's probably all "sheet". Have a good time!
http://www.compcams.com/Cam_Specs/Ca...x?csid=73&sb=2
It was referenced by another post (Extreme Energy 268H). This should work well with your components. Just don't change your mind. Your rwhp should be between 275-325. That's about as good as it's gonna get and should work well for you on the street.
Don't get wrapped up in the "rwhp" thing, unless someone has a dyno sheet, it's probably all "sheet". Have a good time!
