Thread: 259cc @ 4bar safe for ~200whp? help

Dema I got the perfect top feed Inj that is from the 20V which is 350 cc and is good for 240 WHP. I will sell them for $125 shipped

Yeah your adding values to clean up the a/f ratio across the board, richening it up in places and so on. Turbo is a whole different story. Either way, you will need to find out what 259cc injectors at 4 bar is equivelent to, how many cc over 259 it is, and then take out that percentage across the board on your low throttle and adjust as necessary on your high throttle, and yes with that small of an injector there will be parts of the map you will go back into the + side of things likely right after the mid range but your gonna max them out as Miko already said. It doesnt take much boost to make 205whp on a RR de. 6-7psi and youll be over that.

Like we said, try to find some 20v or vet injectors if you can and make adjustments from there using the safc. It can support 444's @3 bar fuel pressure easily.

Just get the injectors from miko and save yourself from blowing up your motor from going lean. It will make it soo much easier. You can run them at 3 or 4 bar fuel pressure and be able to tune them out with the safc without a problem.

definitly truth in that statement,

miko u have a pm coming your way soon

Get these. Don't look back. That's a hell of a deal for a shipped cost anyway.

Well I really wish Nissan could've given us a schrader valve on the fuel rail so I could easily hook a testing gauge to it. If thats the case, I've been running pig ass rich for the last 2 years.

Sorry for the thread detraction

As much as I and the rest of us appreciate the injector and whp thread, I think it's misleading to a lot of people because the numbers are for 100% duty cycle and that's generally not considered 'safe'. I think that should be mentioned.

The numbers posted there are 100% safe. Proven on the street an on the dyno.

That assumption is wrong. Those numbers are very conservative, dyno proven. Ive gotten quite a bit more from my 370cc than listed.

The lines should hold the 5 bar, I ran my injectors like that for about 3 months.
Didnt even know why the car was suddenly running richer, then I set it back down, and the tune was good again...
This was on a walbro 255 and 740cc HKS injectors...

When I went to the dyno, I pushed a bit over what Miko documented with no issues at all, ran it like that for about 6 months and had no issues, then I swapped setup and went with bigger inj.

The Miko thread is great to know how far you can go on the injectors