Re: 7747 tuning again

[WEG1192@aol.com]

Bob,

I raised the BPW constant to 140 since the engine has 10 more cubic inches 
than a 350. I used Tunercats equation with a 5.9L vs. 5.7L engine. As for 
EGR, I raised the TPS% EGR ON to 99.9% and the EGR OFF to 99.2%, or something 
real close to that. I realized after I sent this post that I haven't checked 
the fuel pressure under load, only at idle. I figured that idle was the worst 
case for the regulator to handle since it is bypassing the most fuel at this 
condition, but I realized that I could have a stuck regulator bypassing too 
much fuel under load. Its a stock regulator and the PSI is too high so maybe 
there is something wrong with it. As for AMC engines being gas hogs, does 
that mean the brake specific fuel consumption of 0.45 is not vaild for an AMC 
engine, since that would account for high fuel use with less power output?

I'm not sure what you mean about adding one table at 30% and the other at 
100% and only getting 100%. If my main fuel table was at say 70% at 3200 RPM, 
and the adder table at 100% at 3600 RPM, shouldn't I get the equivalent of 
170% at 3600 RPM? My problem was not knowing what 170% is. If the VE tables 
are turning on the injector at its maximum rate at 100%, 170% means nothing 
from a fuel delivery standpoint, right? But this is a moot point since I am 
not reaching 3200 RPM on the hiway. This engine seems to be a low RPM mule.
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo@lists.diy-efi.org