NOT ANOTHER CAM THREAD!!

[Red63440]

You mean back when there was 98 octane fuel available everywhere?

My point was, just about every 383 built with open chamber heads has no quench.
Some of those combos will have a problem with ping as a result...... some won’t.

In one thread I notice that you mentioned that the 268 Voodoo would be a better choice than the xe268, can you tell me which Voodoo 268?

 

[Nate S]

You’ll find that chasing quench is a PITA and it’ll net you about an extra 1/4 point of compression on a good day. If it’s a fresh complete build go for it, if not, don’t fret over it. Measure the parts, cc the heads. Open chambers will run in the upper 80’s unmilled. I’d aim for 9.0-9.25 :1 if you want pump gas and timing set as it should be with a 215-225 @ .050 cam.

The voodoo cam uses higher valvetrain acceleration and velocity for more lift. Expect to use stiffer springs and have higher valvetrain wear. The comp cams will be more stockish in terms of ramps (modified cycloidal or similar) and have longer life. You’ll get more power from the voodoo.

 

[That_Tall_Dude]

Stock HP 383, with a single plane, carb, and headers gets you 400 hp

Better to do dual plane high rise though, won’t cost much power up top and deliver a lot of torque on the rest of it.

Got 406 hp out of this one; with the m-1

Desktop dyno says the same I believe

https://www.hotrod.com/articles/mopp-0209-383-engine-restore/

 

[That_Tall_Dude]

(stock 906 heads; if any body know flows for stock 516s can punch them in)

 

[70rcode]

Hi Red,... Maybe I missed something but Elgin specs that E1053P as 253 @ .050 solid lifter Pro Stock...Not exactly in agreement with the pictured juice stick you show... Just for clarity, what cam is in your motor ? ......tom.

 

[Red63440]

I think the one he posted was an example...I am curious about the xe268 especially its vacuum.