Nightstalker

Hey guys, I am pretty new here. I have a question for you. I have a turbo system built by cua0. It’s a TEO4H, and its mounted on a d16z6.I have no fuel management what so ever. This system use to be on cau0s car and he had problems with detonation above 4000 RPM, likely due to Vtec. I don't wana put the turbo in until I have found a solution to this problem. I was talking to a guy at a local tuning shop today; He subjected using a rising rate fuel regulator with my stock injectors to solve the fuel problems in my car. Basically it’s to attach the regulator to my intake manifold so that as the car receives boost the fuel pressure will increase. In theory it should work but there is going to be a point where the injectors are going to max out even with the increased fuel pressure. And I would hate to see that happen at 7000RPM. But you should be able to see the injectors maxing out using an A/F gauge right, if you ramp the RPM slowly? It should get leaner and leaner until you start to get detonation.

What do the turbo gods think about this?

The recommended ratio for the fuel regulator was a 6:1

I don't know much about Fuel managment yet and this is why I ask.

willahlborn

when your car is in boost, at least if it's running safely, your a/f ratio will be too low for the guage to even register. your stock o2 sensor and air/fuel guage will only look right when your ratio is around stoich (14.7). anything lower than that and it will just read rich. your a/f ratio should be around 12.0 when in boost. you actually could do what you're saying if you had a wideband o2 sensor and controller. those will read accurate from about 9-20.

as far as the limit of the stock injectors with a rrfpr, I don't know.

TurboEF9

The "limit" you're talking about is your inejctors duty cycle.

Since you're using your stock fuel maps, and not changing the fuel pulse durations, your duty cycle will not be effected.

However, there comes a time when you're fuel pressure will be so high that you start to damage your injectors. Sticking them open and such...

People generally run 5-6psi with a rising rate regulator (an FMU).

Read the Engine Management FAQ at the beginning of this forum.

Nightstalker

Thanks guys