How much boost can you run on the +20 injectors on a intercooled 2.2? I figured that I can safely run 18lbs, but if not let me know!
You need to find a 3 bar off of a GN at least and a 3 bar cal. Or you turn the injectors down till they flow like stock or you flood the engine with fuel unless your at full boost. My brothers van gets 9-11 MPG city / highway with a +20 and no cal for it. I would keep the stock injectors in untill you get a cal and a map. Then if you run alki injection set it to come on at 20 PSI and run 25 PSI of boost. DON'T run alki injection with a cal and +20s, way too much fuel. I've seen people for years run 18 PSI on a stock engine and bigger IC with stock injectors and Grainger valves. +20s to do it is just super safe. Once you start porting the head and intake and adding 3" exhaust things get exciting. The Flex fuel injectors are about a +20, should have got them for free at a pick n pull and used money to get a cal. I've done it a few times lol.stock head, stock 2 piece and a ported exhaust manifold.
I will eventually go with a wideband but I need a good healthy motor, suspension,
Decent tires and some other more important stuff.
I plan to run 18 psi with a home made ally system.
But teenage budget and time interferes a lot. So I'm moving one step at a time.
I already have the +20's, a huge fmic, and some great tune up stuff but I need rear struts badly and I need an exhaust before I start thinking wideband.
If I run 18 on a stock cal with +20's a nb gauge, and a pyrometer can I get by?
Why would anyone buy a bigger injector just to pay more money to turn it down to stock flow numbers? You don't get more fuel when you turn them down. My brothers van has them just plugged in. However it uses a TU cal for +20s now and runs right. I had to run +20s at stock fuel pressure with my GLHS. Everything ported and 3" exhaust thoughWhy didn't I get this many responses when I asked this a year ago? Well, one response was all I needed. I did have an AFPR, and turned down the fuel pressure. A year later and the car is fine(a friend owns it now). I don't know about that poor gas mileage the Pope's brother was getting, as I was still getting mid to high 20's(MPG) on the highway. Maybe he was running stock fuel pressure? Anyway, you can't think about any boost levels past 14lbs without some kind of intercooler. My old car has a SRT4 intercooler, which is great for that mild setup.