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383 Dyno Results Part 2

lars

Well-known member
Joined
Feb 15, 2003
Messages
209
Location
In my workshop bar in Denver
Corvette
64 Black Roadster; 85 Coupe; 09 G8 GT 4-door Vette
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.
:beer

Lars
 

65TripleBlack

Well-known member
Joined
Aug 8, 2003
Messages
128
Location
"Down The Shore"
Corvette
1965 black/black/black--1985 red/graphite
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.
 

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