I'm looking at a 383 stroker crate engine and I have a few questions about the hydraulic cam used in it, the specs on the cam are.

050 duration: 234 intake; 244 exhaust
advertised duration: 300 intake; 310 exhaust
cam lift: 325 intake; 340 exhaust
valve lift: 488 intake; 510 exhaust
lobe center: 107 intake; 117 exhaust

The compression ratio is 10:3:1, it has world products sportsman heads and high performance stainless steel valves 2.02 intake; 1.6 exhaust. It is reccomended that you use a 3000 stall converter, do you agree or would a 2500 stall converter work fine? would I need a vacum resivoir for my power disc brakes? will this cam give me a rough idle and still be streetable? and will this motor have a problem running on 93 octane or would I need to add a few gallons of 100 octane? would a TH350 trans work fine or would a TH400 be better? it is also possible to get magnum roller tipped rockers or aluminum roller rockers on this motor which would be better? The motor is rated at approxamitley 420HP @550RPM and 455FT lbs of torque @3900RPM I know that you can get a 383 stroker to make more power than this but I'm not looking for an outrageous motor, I'm just looking for something that will be fun on the street and to go to the dragstrip with ocasionally. My current motor is a 350 with 8:75:1 compression with world products S/R heads with high performance stainless steel valves 1.94 intake; 1.5 exhaust, it's hydraulic cam specs are.

050 duration: 214 intake; 224 exhaust
advertised duration: 280 intake; 290 exhaust
cam lift:295 intake; 310 exhaust
valve lift: 443 intake; 465 exhaust
lobe center: 107 intake; 117 exhaust

It is rated at approxamitley 300HP @5000RPM and 365ft lbs of torque @ 4000RPM. So I'm sure I will feel a noticeable difference in how the 383 compares to my current 350, right? Thanks in advance for any help.

Brandon

sounds like a performer rpm edlebrock cam. i don't like them. much better cams than that out there. CC XE274 or XE284 would work much better IMO. that's if you want an off the shelf cam.

That looks a lot like the Edelbrock RPM cam. I ran one for a couple years. Very rough idle. I called Edelbrock about what CR and converter would work best. They said a 2500 SS converter would work but a 3000 is better. My experence agrees with this although the engine it was in had less compression than your's, it was very soggy until 3000 rpm. They also recommended 11:1 for the cam. I'm sure this is a valid recommendation, too, given the long duration of the cam. I think you'd be better off with a smaller cam such as a 280º on a 108º or 110º LSA. You would have a smoother, but very noticable idle and probably make more power. The 2500 stall would work better with the smaller cam.

With the RPM cam and that CR you could probably run it on 89 or maybe 87 octane. A 280 cam would run on 91 or 92 octane.