I assume there is an upper rpm limit on what Nistune can work at? Anyone know for certain what that number is?
edit: Oh, this is for SR20 if it matters..
edit: Oh, this is for SR20 if it matters..
Topend operating limit on Nistune
DMSentra
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From what I understand you can scale the maps up as far as you want to go, you will just lose more and more resoulution in the lower end. It's a tradeoff but if you need high rpm tuning then you probably won't be using much around the low end anyways.
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You should be able to. There are lots of things to consider here. 12k rpms? Is this an n/a build? I wouldnt recomend a beginner tuner taking on a 12k turbo as their first tuning adventure. If you give me the part nissan part number of your ecu i can tell you which board.
And 16x16 is the type of maps nissan uses. Ill have to post a screen shot later when im not on my pda.
And 16x16 is the type of maps nissan uses. Ill have to post a screen shot later when im not on my pda.
Yeah well I think I've got enough good help to make a go of it.
Not NA, turbo. 1.4L based on GTIR stuff, destroked SR16 crank, H22 rods, pistons, custom intake and ex. manifolds, and awd under a B11 skin. Going with a T28R for starters till we get the bugs worked on a bit. I'll have to hunt up the ecu, haven't seen it for a couple years now.:scratch:
Not NA, turbo. 1.4L based on GTIR stuff, destroked SR16 crank, H22 rods, pistons, custom intake and ex. manifolds, and awd under a B11 skin. Going with a T28R for starters till we get the bugs worked on a bit. I'll have to hunt up the ecu, haven't seen it for a couple years now.:scratch:
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My car is scaled to 8k. No problems there. At that im even wasting 3 whole rows of scaling on my fancy rev limiter (that i have now found a way to do it with 1 or 2 rows but i have no reason to retune because the resolution just isnt needed).
Also take into consideration that few standalones actually have more resolution than nissan ecus. I feel 12k is going to be simple enough, i dont think i would try to spin a turbo motor faster than that however. N/A would be easy to go higher though.
So I received an email back from Matt at Nistune, it has the same limitation on rpm as Nissan's ecu's, 8012.5rpm, as he hasn't gotten around it yet. You can run higher than that but the ecu won't be in control of the tuning adjustments.
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apparently not with nistune lol. Im really not sure what others offer. 16x16 is really great though, but I just guess the few guys that want to rev the piss out of their engines are left out in the dark for now.
Im going to have a chat about this with Matt sometime. I can usually catch him real late at night (which is normal hours down under. He is the man behind all of this so chances are his information was correct to you.
I have never had any engines we have revved past 8500, but whats alarming to me is there is no safeguard or prompt that lets you know that no changes are being made past 8012.5.
I have also logged 8300rpms on my engine too..... lol. As fast as my engine revvs, I would almost need an engine brake for it to not overshoot the limiter lol.
Here's the text of the email from him. Maybe you can confirm or clarify the info...
"The standard Nissan ECUs are only able to calculate upto about 8012 rpm in their stock form. Whilst Nistune allows you to change the parameters to retune your vehicle, adjust limiters etc it will not get around this RPM problem
There is an ECU development project called 'tunercode' (www.tunercode.com) which works on this, it is not available for Nistune at this time. You would need to contact the author and use a calumsult board with this firmware"
Wow that doesn't copy well here.. This is the same info I got from Dave Dun about the Nissan's and Calums also. There is some working around it though. I'd love to see Matt hop the fence and bring the high rpm out to us, but it sounds like to him there isn't enough interest to make it happen maybe? Yet anyway...
"The standard Nissan ECUs are only able to calculate upto about 8012 rpm in their stock form. Whilst Nistune allows you to change the parameters to retune your vehicle, adjust limiters etc it will not get around this RPM problem
There is an ECU development project called 'tunercode' (www.tunercode.com) which works on this, it is not available for Nistune at this time. You would need to contact the author and use a calumsult board with this firmware"
Wow that doesn't copy well here.. This is the same info I got from Dave Dun about the Nissan's and Calums also. There is some working around it though. I'd love to see Matt hop the fence and bring the high rpm out to us, but it sounds like to him there isn't enough interest to make it happen maybe? Yet anyway...
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Yep, it is what it is. I dont really get down with all of the programming side of things.....
I honestly dont know what to tell you other than with a build like your doing you dont want to have any hassles in the tuning process. You might need to look into other more expensive options just so you will have a strait forward tuning experience. This is the first I have heard of our 8k resolution limitation and I wouldnt want my engine to be of the first to see how well the work around works.
I honestly dont know what to tell you other than with a build like your doing you dont want to have any hassles in the tuning process. You might need to look into other more expensive options just so you will have a strait forward tuning experience. This is the first I have heard of our 8k resolution limitation and I wouldnt want my engine to be of the first to see how well the work around works.
Also note that there is a pretty neat little thing built into the ecu where if you hit into the top 20% of load, it auto maxes to the last column on the TP scale. Never heard of the RPM limits, but it you might be able to trick things so it works nice at 12k rpm. Basically at that RPM, changes are you will be maxing the TP scale anyways so you can use the right most load columns to adjust for the higher RPM. If that makes sense ?
Also note that Gabe did a few tricks to get 16x32 maps. Few ways of doing it, but the main hack seems to be using the secondary fuel/timing tables to extend the primary maps to the right 16 more columns to the right. Need to hack in a little routine that looks at the TP value and do the switch. Pretty sure he had it running well in one of the zeitune versions for 8Bit ecus.
Also note that Gabe did a few tricks to get 16x32 maps. Few ways of doing it, but the main hack seems to be using the secondary fuel/timing tables to extend the primary maps to the right 16 more columns to the right. Need to hack in a little routine that looks at the TP value and do the switch. Pretty sure he had it running well in one of the zeitune versions for 8Bit ecus.
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