Originally Posted by
stryfox
Working with v-tech to get my tune close enough to put it on the dyno.
with a sl-55 pump and Needswings regulator and filter and 550 bosh injectors I am still very fat. Seeing low 10’s afr.
Are you guys hooking the can- boost signal to the regulator or leaving it off and running a consistent fuel pressure?
what pressure you guy running. At 58 psi it is too rich with the regulator port hooked up.
Going to try 55 psi and see what happens.
any input? Thanks
i did search and read a lot of information I’m not sure why it is so fat.
I am running a similar setup on my SLK32 with the same injectors, same fuel pump, and AEM regulator set up on the return from the fuel rail. I'm running at 60PSI with the the port open to atmosphere. I suspect that your tune just needs to be adjusted. But there is no reason why you can't lower your fuel pressure to get it closer. As an example when I Briefly ran the stock tune to go through smog I lowered my fuel pressure to about 40PSI and and my AFRs were pretty good.
Chris