rb20det information

[Minorci]

Hi, just have some questions here..

RB20det standard injectors are approximately good for how much rwkw's?

My rb20 just went in for a full rebuild, and i purchased a garrett gt28 bb turbo - .70 comp cover, 0.64 exhaust housing, rated at 400hp. The wastegate actuator spring is rated at 11.8lbs.

Now does that mean with the spring rate my minimum boost is 11.8psi? Because im a little worried about my injectors not being able to keep up with the turbo. I was planning to run about 8-10 pound initially, then once i upg fuel system i wind up the boost. I have a hybrid ebc btw.

Any thoughts/insight would be appreciated.

[V8eta]

On a hub dyno i maxed out the std injectors and fuel pump on my gts4 at 190rwkw, so would be a bit less on a rolling road id imagine.

[Minorci]

I have an aftermarket fuel pump, which should extend a bit past 190kw's, does anyone else have any info?

[V8eta]

The pump will allow for a little extra, maybe an extra 5-10kw but not alot. That was 190 kw at the wheels Minorci, not the flywheel, so you'll probably get 300-310 flywheel hp from the std injectors with good tuning.

[aybee]

if thats the spring rate, then thats your lowest boost.

[V8eta]

I would upgrade your injectors because they will be completely maxed at that boost level id say if getting a little on the lean side with the gt28, they arent an expensive mod so it will be worth it so you can use the potential of the turbo.

[Minorci]

Okies looking at getting a set of GTR injectors from rbnt,

got a question, rb20 injectors are high impedance, and gtr being low, I have a microtech ecu, do i still need the resistor pack to install the gtr injectors?

[Minorci]

-bump-

anyone know about the gtr injectors needing a resistor pack with an aftermarket ecu?

[V8eta]

i think you will still need the resistor packs.

[Mase]

what about some 13b injectors?? They are the same impedance and are pretty cheap like 200 a set of six or something.

[Minorci]

Thanks for the input v8eta,

Mase: Yes they are a straight swap, although i think they need a dif plug? But the general consensus of the threads i have been reading is that those injectors are designed for a rotary engine, the spray pattern being suited for that not so much a piston engine and apparently are a bitch to tune.

[V8eta]

I think the microtech should run 550's alright, just make sure your tuner can give you a nice lean cruise setting otherwise fuel economy will be awful