How different from the stockP74 map would this setup be?

TurboLS · Post by **TurboLS** » Sat Apr 28, 2007 11:19 pm

I just rebuilt the B18B1 engine to the following specs:

81.25mm bore
B16A pistons (OE O/S)
LS rods, crank
ARP studs/bolts (not like they'll affect AFR...)
Block decked .005"

I calculated the compression ratio to be about 11.5:1 static. I am wondering if I would need to deviate a ton from the basemap as I am still running stock LS cams/valvetrain. Since the only change in air flow will be the compression ratio, would fuel be altered all that much??

Also, any tips on high compression ignition? especially for WOT??

TurboLS · Post by **TurboLS** » Tue May 15, 2007 11:32 am

Alright, well the rings are still sealing, but at 225psi across all cylinders, I have about 140HP/125TQ and that is a mild street tune.

I am hoping to back off the ignition at high load as well as richen up the top end as well.