Nistune Forums

Hey guys,

I tried running a NIStune board with 54C00 code in a 69C05 ECU on the bench and I couldn't replicate this fault.

Has anybody tried running 54C00 code in an EPROM board on a 69C05 ECU?

PL

Easy to fix. Already got the bits in the shed for it. S13 SR20DE loom, ECU and sensors. Graft onto Mazda engine. Tune away!

PL

Hey Mike, The technology (for Type 3 boards) is already there. Our old "EPROM boards" for S13/U13/N14/KA24DE/RNN14 hold 4 maps. So it's just a matter of completing your individual tunes using NIStune realtime boards or emulator or whatever, then programming your maps to the EPROM chips. We...

Hey Mike, Yeah, they seem to deliver very average results indeed. Think I'll stick to my SR's! Don't worry, I'm promoting E85 wherever I can! If it was more readily available I'd certainly be using it in my little Mazda 121 work hack (currently running E10). I'll be doing another E85 SR20DET job in ...

Should just be a matter of tracing the track on the board inside the ECU from the tacho pin to whatever device it goes to. It'll be a transistor in "open collector" configuration. If you're an electronics type guy then you could try to identify the transistor or just grab one from a dead E...

Hey Mike,

I did an R34 board for a local place the other day and it all worked fine but I was surprised at how much power it didn't make. It just had a zorst and FMIC. Boost was increased to 12 - 13psi with std turbo. Made around 200rwkw.

Is the std turbo on these no good or what?

PL

You'll have to check the manual about the CA18. They may be different to SR20 (I deal primarily with SR20 stuff). They appear to use a reed switch + magnet arrangement in the speed sensor. SR's use a magnet/coil system. Looks like CA's still send the speed sensor signal to the speedo head though so ...

Hi Eric, Interesting about the 54C00 vs 69C05. This may be it. Have you tried running the 54C00 in an EPROM board? I recently got hold of a 69C05 ECU (at considerable expense!) so I'll give it a go on the weekend. I've seen this in some of the other SR20 ECU's. I tried to run a U13 image in a local ...

Most of the speed sensor inputs are the same. The sensor signal doesn't go direct to ECU. It normally goes through the speedo head or some other circuitry before going to the ECU. Dunno why I'm typing this - I've done it before. Lookee here: http://www.plmsdevelopments.com/ssi.htm I make a little mo...

Hi, I've not done a VQ but I'm thinking that you'd probably get away with just not using the auto and the ECU would work OK without it. Other Nissan ECU's seem to cope OK. The signals are going from the ECU to the auto trans ECU rather than the other way around. About the only inputs you might need ...

Hi Eric, Can't say I've heard of that one before. We've done quite a few boards for GTiR and never had any complaints bar the one Matt mentioned - and that was to do with driving the factory boost cut solenoid. I tuned a mate's racing buggy with the same board and he's now been racing it (very) succ...

The real hassle here is that sometimes they will do more than just jumping to the knock maps. They'll also go "one step beyond" and start pulling timing below the values in the knock map. I'd understand this if a knock DTC was being produced but they'll do this with no falut codes evident....

Normally you adjust the Injection Multiplier to get things roughly correct, then click on the individual cells in the fuel map and use the up/down keys to adjust.

*** please read the documentation on the NIStune site***

http://www.nistune.com/documentation.html

PL

I fear it could be a tad more complex than this. Sure, we've got that DC level that the ECU likes to see so it doesn't raise a DTC. But really what's going to be happening is the ECU will be counting knock events so it can work out whether it needs to jump to the knock maps or not. Plus as Matt ment...

Thanks Noz. Nice to know that all my typing wasn't in vain!

PL