383 Dyno Results Part 2

[lars]

For results and comments on my second round of dyno testing on a 383 small block, be sure to check out the thread in the C3 Section at:

http://www.corvetteactioncenter.com...ce/126329-new-dyno-results-re-test-383-a.html

Lars

 

[JohnZ]

Well thought-out test plan, and nice results!

 

[lars]

Thanks, John!
I actually showed up at the dyno with a printed Test Plan that we hung on the dyno cell window - this allowed us to really bang out the test configurations and stay focused. The 18 dyno runs represented 8 different engine configurations (not all of the changes and configurations are outlined in my Topic Post over on C3 Forum), and we pulled it off in 4 hours flat, which included installing and dismantling the engine, and loading it back in the truck... You've never seen anybody do header swaps and carbs changes so fast in your life. I even did a distributor swap from the HEI to an MSD and back to the HEI, just to see if the HEI was seeing coil saturation: Swapping from HEI to MSD resulted in absolutely nothing, by the way: The numbers were absolutely identical through the entire rpm range.


Lars

 

[65TripleBlack]

Cam

Small cam in that engine.
Around 230 @ 0.050"?
How much do you think that the 2 "bad" cylinders are sapping power? Maybe 20 HP?
I would expect to see a 383 with good flowing heads, open headers, efficient inlet tract to make closer to 480 HP.