Motor Specs and Cam choices?

[keith]

Just wondered what you guys think about this set up. Is the Cam to weak?
4 bolt main 60 over with 400 crank balanced
Dart Iron Eagle heads/Crane 1.6 ratio roller rockers
Flat top pistons
cast non egr Camero intake
MSD box/coil & MSD Pro Billit Distributor
K&N 5"x14" filter
Hooker Competion headers
Commander 950 fuel injection
The cam is the Comp 4x4 12-235-2 210 intake and 218 exhaust .447" and .462"

Is that to mild of a cam ?


79 Blazer 6"lift 38 SX's locked/4:56 <a target="_blank" href=http://www.keith.rockcrawler.com>www.keith.rockcrawler.com</a>

 

[tori89k5]

Hey Keith, actually sounds like a nice combo. The cam is rather mild, but if should give good torque, and the 1.6 rockers will provide a tad more lift. This should make a good smooth motor for low RPM power and good ole' chuggin.
Have fun, and let us know how you like it

1990 K5 4" lift, 33's, 3.73's Raptor Tranny and Velvet Rides....

 

[Blazer79]

If youre planning that engine for a Blazer, that's the largest cam I'd go. We need good low-end torque, and more than that would give you good mid range with less low-end. Of course if you have 4.56 gears and 31" tires, you'll definitely need a larger cam

.

That's my opinion.

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[keith]

Oh yea, 4:56 gears and 38's. And that motor is in my Blazer now. I just wondered about the cam.

79 Blazer 6"lift 38 SX's locked/4:56 <a target="_blank" href=http://www.keith.rockcrawler.com>www.keith.rockcrawler.com</a>

 

[slider]

Hi Keith, I bought the differential covers from you. Anyway I am almost running the same motor as you listed but I am running a 12-238-2 Extream Energy Comp Cam. This one seems also kinda small but I am running 1.5 roller rockers. I think with you running the 1.6 rockers it might be ok. I am going to switch to a set of 1.6 to see if I can get a little more out of this set up. The best thing I did was to have the distributor degreed and I port matched and pocket ported the World S/R torquer heads i bought. See if you can find someone to degree the dist. It seemed to really help with the torque curve. Also is that fuel injection unit 950 CFM or 750 CFM? I know a buddy that is running a 950 unit on his big block and it is almost too big. Maybe look at the 750 cfm unit. Also he has had one controller already go bad, It was under warranty but he is kinda leery of the unit. He is looking at going with a Edelbrock unit and dumping the Holley unit. I have heard more people having problems with them but have heard of no problems with the Edelbrock unit. Look at Tuned Port injection, that is a killer system, Chevy used them for many years and the system was very reliable and parts are easy to get, just as close as your local parts house or chevy dealer. Later Jeff

 

[keith]

Currently the initial timing is at 8 and the distributor is 25. MSD has a set up that allows you to put the exact number you want. So my total timing is 33 degrees. Thats why I have that Distributor on the 4 sale page. I need the late model style to advance and retard the timing with the computer. And yes it is a 950cfm. Remember this unit is completely programed from the ground up. although they do give some base maps to get you started.

79 Blazer 6"lift 38 SX's locked/4:56 <a target="_blank" href=http://www.keith.rockcrawler.com>www.keith.rockcrawler.com</a>