rob82

Had another look at my GTR timing map, 4000 is the standard limit for the knock sensor to operate. So if it had a large knock at say 3800 it may not recover fully, as in pulling out 0 degree's timing until say 4500. Still hacking the ECU for the knock recovery rate (if there is one). I know there is a max knock limit. I might be thinking that the MEC-R(**** forgot number 215-maybe) is actually smarter than what it actually is, it is over 15 years old after all. Where do you work cubes?

Good point however if the dyno sheet you showed me was in 4th gear then at about 74km/hr (where the dip occurs) the rb20det would be doing about 2500-3000rpm?? It would have seen quite a substantial knock and pulled timing out. The extent at which returns from a knock event is determined by the decay factor thats why it dosen't start making power again till 86km/hr ie. it takes quite a substantial time to recovery from a knock event and the rate of acceleration of the engine is much to fast.

The nissan consult cant tell you how much knock retard the ECU is pulling out or at least ours cant. Where you just watching the ignition timing. I know within the map that a value greater than 80 HEX enables the knock sensor to function and pull timing out, if you look at the map you will see. Not sure what RPM it stops working but i'm pretty sure its well before 4500 say 2500 rpm.

Finally somebody who know something about engine managment. Best piece of advice I could offer you firefox is to ditch the electronic carby and revert back to you standard ECU and have it chipped.

I say do it!!!! Maybe you could stick a BOV on it as well, oh yeah and a turbocharger(just for looks thought).

If you're still running the factory ecu, there is no point to a dyno tune. The ecu constantly tunes itself. Your are so far off SKY031. The only time a car tunes itselfis in closed loop mode. When you reach certain parameters MAP/RPM you venture into a place called Open Loop this is where most hoons drive.

Get it chipped - simple. They might even tune it for you.

Get the Nismo 555cc injectors as they have a much more tolerant low pulsewidth accuracy, which make's them heaps easier to tune.

Might be a TPS error if the MAF sensor has been checked and believed to be working. Calibrate the TPS so that it is 0% with the throttle shut. Take note you will probly need a Nissan Consult to perform this proceedure. This should kick in the IAC valve when the throttle is shut, ie when coming to a stop. Let us know how you go.

We have a VX HSV coupe at work with a C5R block, cams and an eaton supercharger on it. This bloke has spent near $300 tho on it and I gotta say it is one of the coolest cars I've ever seen. It puts out about 400rwkw and it just sounds so nice. There's no substitute for cubes; unfortunately.

Pity you didn't buy a VZ LS1 they are definately the pick of all LS1's. Tuned one the other day that pulled 228rwkw standard. As in no exhaust, no cam no induction kit nothing. They come in at 203rwkw. My boss also tuned one in Townsville a couple of weeks ago that pulled 240rwkws with an exhaust. Give us a month and we'll be able to tune your LS2,still in development.

Wobbz - What manual gearbox have you found to mate up to the vh45. I take it your going aftermarket ecu?

Sam - Sounds like you've got much the same gear as us. Yeh we can do the r33 25 however we need to get the boards in from Japan. The focus of the company is more aimed at ford and holdens however we can tune anything really, we've recently had a couple of 360 Modena's in lately very nice. It just depends these days where you want to specialise I guess. The other thing is budget, if you could afford to R&D every car to the level that we wanted we would most definately be out of business. I'm sure you find yourself in the same predicament.

Would definately suggest bigger AFM (z32 are good) as the standard airflow meters usually restrict power to around 160 - 170rwkw somtimes you can get more. With those mods your probly looking at around 200rwkw. This is a rough estimate. Hmmm sard injectors not my favorite to tune but they are ok. I will find out a definate price for you. You might have some time to save as our booking period is about 3 weeks in advance at the moment but we'll see what happens. You cant really compare the E-manage to a re-mapped ECU, talk to any of the guys in the know.

So sam what cars can you remap and do you emulate the data or just edit the eprom and replace it with you own. What programs do you use?

Fair enough, just wondering who else can do the job?

I've seen 140rwkw VL RB30 with a medioka cam and it made 198rwkw with a 75hp shot of nos. I've always wondered about the rb30 26 head conversion two cams higher compression say 10.5ish maybe higher, tuned length individual throttle bodies topped off with trumpets. I would say 200rwkw wouldn't be all that far off maybe more on the right fuel. I say go for it. I would luv to thrash those turbo punks out there with an NA skyline.

I work for chiptorque down at the coast. I would suggest you bring it there as we are the only people in Aus that can reprogram the factory ECU as far as I am aware. Tell me more about it so I can give you the approximate gains.

I've been in a 240 rwkw sr20 and it felt pretty freaking cool. Its mods where FMIC full 3" exhaust, exhaust manifold and turbo(unknown specs) some shitty sard 550cc injectors plus fuel pump of coarse z32 MAF and stock computer.

Are you sure you locked the timing correctly, did the engine note change?

I can tell you the most important thing all the nissan people out there, the connector/s to airflow meter is the most crital connection in the entire engine managment and it is the cause of most problems in nissans of any breed. After all the MAF is used in practically all fuel based mathematical calculations within the ecu. If you have any problems with you car running shit go and check the connetor to the MAF. I guaranty it will fix most problems

Another problem with emanage is support. Autobarn are only interested in sales. That dont know shit about anything regarding engine managment.

People People People, I'm only new to this forum but it is killing me to hear you speak of the emanage as a quality engine managment interceptor. To answer a few questions yes you can tune it for larger injectors to a small degree. This involves mapping of the MAF sensor so as to say there is a smaller amount of fuel being ingested. This may work quite well for the slightly larger injectors but going over say 550cc in any rb and your really kidding yourself with drivability. Factors such as injector latency come into effect with larger injector and this is some thing that emange has no idea about. And yes you can tune for cruise with interceptor ecus to a degree. Another problem with piggyback systems is if you have variable valve timing, as all the piggy back does is intercept the crank trigger and alter the signal back to the computer. Therefore if you increase the timing at a particular point say 10 degrees then the cam timing will be 10 degrees advanced which means the peak valve lift and duration might be at an undesirable point. You are better off having the standard ecu re-mapped for the injectors in use. The standard ecu is the best engine management for any car and any engine as these companies have spent millions upon millions calibrating sensors any writting code for every type of enigne condition that the ecu will see.