rb20det tuning options

[lexrob]

I've just been looking into ways to tune rb's. I realize that a complete ems is ideal to alter timing, inj. duration, and other items. This includes a remap which is basicly the same thing. Anyways i thought of power fc as an option but...it discontinued so now what are budget limited options.

-Can you pull back inj's enough with safc to run like 440cc. Is that even reliable keeping a resonable a/r and have enough play.-Obviously nistune sounds like its the solution but i've heard its basicly still in development.(ive used turbo edit on a honda: it was....unreliable)

I just want an affordable solution maybe even have someone do it for me Southeastern tuner recomendations? This is of course after i have completely solved all my other minor problems.

Just got off the skyline forum in amazement of their #'s from just a 3inback,fmic and a tune!!!! OMG 240-270hp. Like 60hp gains from just a tune is just... ... ...... ....

[lexrob]

Just to add to this unreal power gains... by their dyno maps stock rb's only put out 170-195 hp. Maybe there dynos are different or sumthin because stock is "220".

Skyline masters explain these #'s for me. (89-93)rb20det silvertops.

[Cjmartz2k]

Yeah, there is a lot left in the tune. They run like 10.5:1 afr's stock. You said it's an RB20, right? Just get the stock ECU chipped and It'll handle what ever you want injector wise (that you would want to run on a 20).

[lexrob]

Yep RB20-Is a sent out tune reliable? Enough to not invest in a wideband.

Im guessing its a must to have a wideband but i've only heard good things about one manufacture-AEM=expensive. I have experienced an lc-1 wideband and was not convinced at all. 10:5 is RICH im guessing timing is not up to par explaining the gains.

safc: According to my local evo tuner shop guy "safc works only when inj. are oversized or ignition can also be controlled. Due to the fact that you basicly fight the computer."

Maybe someone can further explain that statement, it was sumthin like that. In that you can get around not using a complete ems. Not ideal situation but werks!!!

[Cjmartz2k]

A SAFC would probably work in your situation. Not the best solution, but better than nothing. It lies to the ecu telling it there is a different amount of air going through the MAF than there actually is. This just pushes the ecu into a different part of the timing/injection maps (both of them). You can get the fuel right, but the timing will be off a bit. How much is determined by how much fuel you take out.

I don't know about "mail off" tunes, I was just talking about ROM tuning your ecu. I used to drive for my shop guy who did it on the fly back in Oki. You for a stock turbined car though, most everything is pretty standard, so if you tell the tuner what you have, he tunes it from experience and mails it back to you, you could then get an SAFC and tweak it. Hopefully it wouldn't need much tweaking, but yes, you'll need a wideband and of course a SAFC. By that time you could have bought a stand alone.

I think with a stock turbine though, a mailed ROM tune from somebody who it known to do it is a good idea, and the most cost effective. Or you could find somebody you are willing to drive to, that would be optimal.

[lexrob]

Great expanation that makes perfect sense now. Simple concept but what if you added msd.

Im guessing it would be a push pull kind of way to tune. And probly not extremely effective for the $ at that point. Ill have to come back to this when i get a few more gremlins fixed and more cash to spend.

:such as no power steering, no dimmer headlight switch, one speed for wipers, one wheel wonder open diff., sitting in air like a 4x4, had to caulk my sunroof shut"leaked BAD". Little stuff but blows for the Daily. Thanks CJ for the input

[Yellow4g63]

If you have a laptop get Nistune software and the real time board. I'm no Rom wizzard like CarlH but I got my car to start with 800cc injectors and a Ford lightning maf. It's just the fine tuning that's going to take a while.

[legit240sx]

Got my silvertop ecu rom tuned by Carl H for 444cc, z32 maf, no boost limit, no speed governor for $150

[nos487]

How does it run before and after?

[legit240sx]

that is yet to be determined in about a week, but seach through nico and you can find some testimonials.

[RustspecS13]

Nistune is very refined. Very easy to use. It's what I'll be using.

My friend has a 91 maxima. VG30E+T, it has 680cc injectors. It makes over 400WHP, idles smoother then my maxima, and gets 32mpg, and its a 3200lb car.

~Alex

[lexrob]

WOW

Well ive heard only good things but actually read about few experiences. Ive seen the screen shots and it looks user friendly and even has logging!

I just need to hear some more success stories as in a novice tuner working with it. I know anything can be done and can work but is it worth the $ to invest in a wideband and install. Also is it reliable enough of a program to use for a DD.

Thanks for the feed back guys. (as for the maxima-tell him to come tune my s%it seriously)=hes good, pure genius if true statements.

[lexrob]

Let me know how carl's tune does hes GOOD told me how to fix my wiring in an email. Down two weeks for one ground wire.

I wonder what else he can do as far as blow off non recirc., two step revlimiter, clean up a closed loop enough to get ok MPG, and or set up some kind of logging> consult.... I guess does it im lost on that its like 30,000$ for one im shur there is another option.