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#1
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solid cam for 360
I have a '79 Li'l Red Express with a 40 over 360. It has a Performer RPM intake, Holley 765 carb, and KB 107 pistions. The heads are stock castings with 2.02 valves and a street porting job. I have been running a MP solid 284 cam with 1.6 Crane Gold rocked arms. It has ran great, but the cylinder #6 intake lobe started wearing down. I run a 4 speed and 4.56 (thinking about going to 4.10's). I want to get between 450-475 hp when it goes back together. I am going to port the heads to help get more power. I would like to stay with a solid cam and under .570 lift w/ my 1.6 rockers (.534 w/ 1.5). Any feedback on cam choices?
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#2
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Port your heads out fuly. The stock castings are not goimg to cut it. The current cam shoul do well in the HP level you want, and 4.10 ratio.
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#3
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Heres a couple of sites to surf around.
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#4
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You'll find that without some real trick porting and blending on the short side of the runner by a real pro or someone with a flow bench the air flow will drop like a rock at about 520 lift.
Are you still running 3/8 valves?...take another 10 points off. #6 lobe?...I'd sure like to see the valve tips....and the base of the worn lifter. Sorry but I have no faith in the quality or consistancy of Mopar cams, I've run them on a profile computer and they're all over the place. |
#5
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Cuda...
Most of the Mopar cams I have seen are right on the money. Obviously you have more experience at it than I do, but as far as cam manufacturers go from what I have seen Comp and some of the other Chevy grinders are off up to 10 deg. This is a big problem when you set up a new motor. Degreeing in a cam is VERY important in a new engine build. |
#6
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Your right Dart, many cam companies do a rather sloppy job, and unless you have a profiler it's almost impossible to see it.
The profiler follows each measuring lobe lift, ramp speed, center line etc. and plots them on the screen and will also group the lobes together and show you an on screen comparisom for each lobe...it's very interesting especially on the low end bargin mail order stuff. No motor should ever be assembled without degreeing the cam in. |
#7
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That is interesting and anyone building a motor should take note. I would like to see some of the PAW cams profiled. I like some of their grinds like the 484 292 which I ran in a 383 that turned 12.9s.
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#8
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I'll try and get over to my Buddy's shop and steal some print-outs to post, unfortunately they are a BBC shop so the odd Mopar cam they get to check usually comes from me and I just use the screen as his printer was made in 1968 and takes about 20 minutes to produce a very poor quality print in Black and white......
Go figure...state of the art dianostic equipment and a $2 printer..... |
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