thumbsmasher
10-04-2007, 07:58 PM
Wondering where I might find a list of specs for my LBZ. I'm looking for things like compression ratio; cam lift, duration, timing, lobe centers; injection timing, turbo boost, etc.
Are there any SAE papers on this engine yet? I've searched this site and done a google search, but haven't found anything satisfactory yet. Thanks.
JoshH
10-05-2007, 04:07 AM
Off the top of my head, the compression ratio is around 16.7:1 but I have no idea about cam specs. According to EFI timing varies from -2.7 at idle to 27.3 at 3400 RPM with 120 mm3 of fuel and boost pressure tops out at 38 psi (that's including atmospheric pressure so if you account for that it would be somewhere around 23-24 psi on a gauge).
thumbsmasher
10-05-2007, 07:51 AM
As for the fuel injection timing, I'm assuming that -2.7 is degrees aTDC and 27.3 is degrees bTDC. Am I correct?
JoshH
10-05-2007, 08:00 AM
As for the fuel injection timing, I'm assuming that -2.7 is degrees aTDC and 27.3 is degrees bTDC. Am I correct?
Yes, that would be a correct assumption.
WilliamBos
10-05-2007, 06:51 PM
As for the fuel injection timing, I'm assuming that -2.7 is degrees aTDC and 27.3 is degrees bTDC. Am I correct?
Yes, that would be a correct assumption.
How is that calculated?
JoshH
10-05-2007, 07:18 PM
How is that calculated?It's in the table in EFILive. That's when the injection starts according to the programming. It isn't really a calculation.