From searching around I've gotten some amount of info from both sides. That is. . .

"Yes, you need bigger injectors." and
"No, the stock sized ones are fine."

But most people seem to go further with the mods than I do when they talk about injectors, so I'm a bit confused. I have been told that I should, definitively, get an upgraded fuel pump.

I have a bunch of stuff to put into a currently nearly stock 95, and it's happening gradually over the next few months.

Basically: intake, downpipe, catback, PFC, Pettit SMIC, Bigger Radiator + every single reliability mod, mild street port. The kids tell me that I should be looking at about 310, maybe 320rwhp if I'm lucky/stupid.

I am running stock turbos on stock boost, which incidentally will probably be in the neighborhood of 11 psi by the time the mods are in. I have no plans to go to a big turbo.

So what's the rx7forum.com verdict? I'm not averse to changing the injectors, but I don't want to dump a ton of unnecessary fuel into the engine if I don't need to.

Thanks.

 

You only need to upgrade your injectors if you are running over 12 psi. Actually, many of us run 13-14 psi with the stock injectors and have no problem, though they are running close to 100% duty cycle at those boost levels.

With those modifications and running 13 psi or less, I would stick with the stock injectors.

 

Make sure the stock injectors are in excellent condition before you go about it though - it's always worthwhile insurance to have them cleaned and blueprinted instead of risking an engine failure. They are probably pretty tired by now.

 

https://www.rx7club.com/showthread.p...hreadid=259912