Need a new engine.
Mechanic has quality engine builders.
Probably going 383, maybe 396 route, hell maybe 406.
Have SR. Not really wanting to try to sell it and buy MR.
Need heads, might go AFR 195 Eliminators.
Shooting for 10:1.

Because of the SR, should I go with the 219 LPE cam or could I go more aggressive like a 230/236?

Pros/cons for going 219 and / or a higher duration cam?

 

in my sr 383 with afr heads, the cam i run is a custom ground comp cams, @ .50 236/243

 

I thought that high of a duration would be too large for the SR. How well does yours run? What do you shift at?

 

hmmm. The best thing would be to go see adn hear cars. I personnal think the LPE is too small of a cam based on the current capabilities of the after market. What you'll have to balance out is how much idle/low RPM responsiveness you'll want to sacrifice for the upper end. Now with the RPM limitations (6Kish) of the SR part of the problem is already bounded for you. The emissions passing/streetable choices seem to be the LPE 219, CCA 218/224, and CCA 224/230. (note that AFR used a 236/240 cam for their 513 lb-ft 383 test)

Here are the elements I would (am) considering when picking a camshaft
How much "really" can you get away with as far as emissions?
Cylinder head...the better flowing, low lift, small port head will need less camshaft to perform
Big cam shafts doesn't mean duration as CCA has several hyd roller high lift profiles to design a custom camshaft
beehive springs cut wieght down and thus delay "pump up" a little longer
Your MAP sensor will make it more difficult to tune larger camshafts
You have to balance the airflow (intake and exhaust sys) with the head and cam capabilities.

Here's my suggestion...torque biased
1) fully port the SR runners and base (otherwise stick with the L98 heads)
2) Get the AFR 195 elim (not the competition port just full CNC), ...upgrade to hollow valves if possible/affordable
3) get the CCA behive spriings 26918
4) get a custom cam design to complement the broad torque curve of the SR, full exhaust, and stroker....224/224 on a 114 lob sep, 4 deg advanced...profile # is 3192 (0.605" lift) add 6 or 12 deg in exhaust for power aides.
5) budget for good quality valve train components ($1K) like 2x roller rockers
6) Add as much cubes as you can afford
7) enusre exhaust (you have headers right?) and torque converter are up to the task...

 

Thanks ZD1, just a few things. I don't have a MAP sensor or torque converter.

And yes, I am running headers. Hooker # 2149's with true duals so my exhaust flows real good.

I looked at the comp cams springs with that part number and it says good for .600 lift, but the cam you recommend says .605 would that be an issue?

 

My 406 used a 233/233 HR roller cam and it worked very well (AFR-210's).

SKIDWNIT used up to 242/242 solid roller, so I think the SR can handle a decent cam if the heads flow ell.

 

I always check the lift clearances of the springs to the valve springs. For that same lobe my cam card read 0.602" lift. In the case of hyd roller, the lifter will take up some lift...so you'll never actually 0.605" of lift. I thnik one of my builders qouted me 10 or 20 thousands. The key is to NOT to SHIM the valve springs (like most engine builder would do without looking at your cam lift0, thus perserving the lift capacity of the springs.

When I used the 230 deg version of the 31XX. I had to "fit it" using keeper that provided an extra 0.050" of installed hieght due to the 1.6 ration=.622 lift and the .575" maximum lift of the valve springs I was using at the time. Then I had to clearance the whole thing with the self-aligning rocker! Gotta love being on the ragged edge!

Also check with AFR to see what springs they are using...just a striaght or a tapered/beehive arrangement.

Others mentioned above some great cam choices and you should factor in their experiences to your decision...in the end its your car. I think that the cam I suggested is very much the street cam with a broad flat torque curve. Should you want more "fun" in the 6000/6500 range then an increase in duration is warranted.