Mid-range AFRs ?

[cjo632racing]

My mid-range is at 13.0-13.5, and my wot is at 10.9. If I lower the fuel pressure with my RRFPR will that make my mid-range more lean? Is that safe?

[troyheb]

Do you have the reference line hooked up?

[jp1300r]

My mid-range is at 13.0-13.5, and my wot is at 10.9. If I lower the fuel pressure with my RRFPR will that make my mid-range more lean? Is that safe?

What ecu? Are you running a boost line?

[cjo632racing]

stock ECU. My boost line is from the throttle body to the RRFPR. I am waiting for a brass fitting to plug into the manifold.

[jp1300r]

You may want to just adjust pressure for WOT without the boost line. Don't hook the boost line up, plug it. Check your AFRs.

[Duke]

stock ECU. My boost line is from the throttle body to the RRFPR. I am waiting for a brass fitting to plug into the manifold.

Is hole open now??

You may want to just adjust pressure for WOT without the boost line. Don't hook the boost line up, plug it. Check your AFRs.

+1

[cjo632racing]

[QUOTE=Duke;1645770]Is hole open now??
no

Could there be more boost in the throttle body than the manifold? If I move the boost line from the throttle body to the manifold would that make a difference?

Its a Riva RRFPR should I just disconnect the boost line and cap off both ends? Or put the supplied vent in the RRFPR and cap off the boost line on the throttle body.

[Ocman]

Cap both ends. Boost is theoretically the same at either location however vacuum is only present in the manifold.

[Duke]

Cap both ends. Boost is theoretically the same at either location however vacuum is only present in the manifold.

Like Eric said, the only real difference is vacuum. The manifold reference will pull the regulator down resulting in even leaner conditions at idle or cruise when motor is not seeing boost there. The TB reference will always see boost.

[cjo632racing]

Like Eric said, the only real difference is vacuum. The manifold reference will pull the regulator down resulting in even leaner conditions at idle or cruise when motor is not seeing boost there. The TB reference will always see boost.

It is around 11.0 at idle its only lean at mid-range