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Anybody run the E cam 4 degrees retarded?
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[QUOTE]Originally posted by bwkelley76: [QB] First off I'm a fan of the 331 as I'm sure you noticed from my earlier posts. What a lot of people don't realize is the 331 is a "buzz" motor and the bottom end has a great rod to stroke ratio and can handle well over 6000 rpm continuously. The larger cubes and the more desirable geometry ads torque as well so a lot of people wonder why anyone would want to raise the rpm. A 347 is another story, designed for torque only and not my favorite combo. If I were in your position and I was "stuck" with using the E-Cam I would run it straight up. If I wanted more rpm and less torque I would think about 2-4 degrees retarded. It's not the worst advice but I'm a little sketchy. If I had another 180-250 bucks I'd invest in a cam that would perform better straight-up that has a better lobe profile. WIth a blower you're going to need a more aggressive exhaust profile to get rid of all that compressed air. If you're worried about the "smog-legal" aspect I'd look into the Crane powermax and compucams, etc. Retarding the E-Cam may cause issues with smog as the valve timing may activate too late resulting in High HC and CO. Stock cam will add low-end "off-idle" torque, lots of it, starting at about 1500-1800 rpm and peaking at around 3000-3250. The E-Cam is good for torque starting at about 2500-3000 rpm peaking at about 4250 (If my memory serves me right). ..Once retarded the E-cam's torque curve should raise a bit and it may shave off some maximum torque, I'd have to guess closer to 3200-5000 would be your torque curve retarded 4 degrees. Without the blower that thing would be a DOG on the street with a retarded E-Cam. The "off-Idle" torque is what kills transmissions and drivelines but it's also the "seat of your pants" feeling that everyone likes and also what wins races from light to light. Of course it depends on your combo as well. Gears can make a huge difference of torque to the wheels and how fast it gets there. Also instead of retarding the E-cam have you ever thought about using a B-Cam or an F cam? I've heard of folks having good luck with those as well. If you research it they give you a little different torque curve than the E-Cam. Personally I like the lopey idle you get from the E-Cam assuming the computer doesnt have issues with it causing surging at idle. -sometimes the stock PCM doesn't like the E-Cam though. The E-Cam comes in HARD at about 2700 rpms from my experience and keeps pulling pretty hard up to 5500-6000. I'd be interested to see how well the E-Cam and the S-trim work together, especially with the cam retarded. Honestly I'd still just run it straight-up and try that first with the blower. If it has too much torque for you then retard it later. It might just work retarded but I think you will be disappointed in the low-mid-range performance. We can talk theory all we want but nothing speaks louder than reality testing. In my reality testing I've seen more driveable and usable torque come from some of the higher-dollar Crane, TFS, and Lunati cams especially when coupled with a blower. Hope this helps and good luck. [/QB][/QUOTE]
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