What Scalar to use for cylinder volume?

Discuss General Motors (GMC, Chevy, Pontiac, Hummer, Cadillac, etc) tuning topics here. Request definitions, discuss parameters, etc.

Moderators: robertisaar, dex

Post Reply
cstaples
Posts: 21
Joined: Tue Jul 22, 2008 7:20 am

What Scalar to use for cylinder volume?

Post by cstaples »

Just put a 383 in a 92 Caprice with 16136965 ECM running $62 mask and was wondering how you adjusted the cylinder volume for a 383.

Thanks

cstaples
Posts: 21
Joined: Tue Jul 22, 2008 7:20 am

Post by cstaples »

OK I see that the Base Pulse Constant is where I need to change for engine size and injector flow.

Is there a way to know what the BPC should be with the 383 and stock injectors?
Last edited by cstaples on Sun Dec 16, 2012 9:28 am, edited 1 time in total.

robertisaar
Author of Defs
Posts: 962
Joined: Sat Feb 21, 2009 3:18 pm
Location: Camden, MI

Post by robertisaar »

take original engine size, divide with new engine size.

ex:

383/350 = 1.094

multiply the BPC by that and it will get you more or less there.

Post Reply