rcarson25

iTrader: (29)

I just got a POwer FC on my 93 R1 and I am wondering about what I should run with my setup I have a vmount intercooler and radiator from rotoryextreme and my boost level is at 15psi and I have a greddy sp exhaust. If anyone can help with some tunning data that would be great I am not too sure where to start. I know I can add more fuel, but wondering where and how much stuff like that. Thanks for the space.

rynberg

You shouldn't be running over 13-14 psi on the stock fuel system, and that's pushing it.

If you have no idea on the principles and basics behind tuning (most of us don't), it would NOT be a wise idea to try to do it yourself. Try to find a tuner in your area. If you can't, see if Jason from the rx7store will sell you/give you a map for your modifications. You should still go to a dyno with a wideband setup to verify that your a/f ratios are safe.

rcarson25

iTrader: (29)

I am safe so far I have done the dyno and am safe where I am at, and I am runnnig 14 to 15 psi right now with no problems other than being a bit rich at idle. I know the basics behind everything, I am just wondering of anyone has a similar setup that might be able to give me some advice on where they are at so I don't have to spend forever playing with all the different aspecs. Where is the RX7 store located? Sounds like that might be the place.

hyperion

iTrader: (2)

Let me second rynberg: At a setting of 0.75 kg/cm^2, with the stock injectors I saw 97% duty cycles at 7750 RPM. My AFR's were safe (a little under 11:1) but that was really on the ragged edge, and some would say over it. I have a similar setup to yours: V-mount, DP, HF cat and exhaust.

Also, be aware that the PFC has an issue with reading lower boost pressure than is actually present. At a 1.0 kg/cm (14.2 psi) you're actually running at about 15.5 psi according to most measurements. So be careful when discussing how much boost you're running. You can easily verify this with a boost gauge.

If you have the commander for your PFC, you should be able to see what injector duty cycles you are running. Anything over 85% is sketchy, and over 90% should make you nervous. If you're going to stick with the PFC, I'd recommend:

1) Get a datalogit
2) Get a wide band O2 sensor
3) Get 1300cc secondary injectors
4) Get an upgraded fuel pump (like the Denso)

If you don't, I'd give you good odds of popping your motor in the near future. Safe is better than sorry,

-ch