Check it out - SR20 Forum
 
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#1 (permalink) Old 03-07-2009, 02:34 AM
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Check it out



Kudos to the first one to spot it.
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#2 (permalink) Old 03-07-2009, 02:47 AM
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oh sweet, time to upgrade the valve train!! same story for the b14??

99 Sentra SE-L, sr20ve 20V, 6spd P12 transmission with HLSD, n1 cams, 20v header w/ protech downpipe, calum realtime v2, 949 6ul rims, 11.75" wilwoods, VZR front end

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#3 (permalink) Old 03-07-2009, 02:53 AM
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Yep.

Last edited by Calum; 03-07-2009 at 02:57 AM.
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#4 (permalink) Old 03-07-2009, 04:27 AM
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im biting my nails patiently waiting...the agony!!!! lol
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#5 (permalink) Old 03-08-2009, 06:58 PM
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ok, someone is going to ask, might as well be me. Is there even more rpm available maybe, or going to be? Sending you a email Calum. Loren

I just read Dave's post in a MS thread so some of this has already been answered.

Last edited by EPSentra; 03-08-2009 at 07:14 PM.
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#6 (permalink) Old 03-08-2009, 07:14 PM
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Oh sweet Jesus this is sick! Details please.

Dudeman

1991 B13 181whp on DynoDynamics
"I've decided that because Einstein identified that objects travel through time at a slower rate with an increasing velocity, we should go as fast as possible to increase our lifespan."
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#7 (permalink) Old 03-08-2009, 09:26 PM
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Heard about this last night! NIIIICCCEEE!!!!

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#8 (permalink) Old 03-09-2009, 03:15 AM
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can some one can explain clarify this
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#9 (permalink) Old 03-09-2009, 08:39 AM
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Quote:
Originally Posted by beto_dc View Post
can some one can explain clarify this
Tuning beyond 8000 RPM. Need any more clarification than that?

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#10 (permalink) Old 03-09-2009, 11:06 AM
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MMMMMM... I just touched myself and need a tissue....... You know you can throw in a copy of the firmware with the next shippment going my way...


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#11 (permalink) Old 03-09-2009, 11:35 AM
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WOW!!

Can you add an extra line for the 9000rpm range? let's get a bin from him, some springs and let's have fun!!!

1993 Sentra SE-R
Garret/Turbonetics T3/T4 turbo Trim 60 A/R .63 turbine @15psi, 2.5 inch DP, 550's@4bar, 15 degree timming, EVO VIII FMIC, SAFC II, Z32 MAF, Calum Basic ECU, AEM wideband, Blitz DD BOV, Walbro 255 lph, Nismo FPR, Prothanes motor mounts, Prothane suspension kit, Eibach sport springs with KYB II struts, ACT Extreme clutch kit, Profec A EBC, welded case.

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#12 (permalink) Old 03-09-2009, 12:52 PM
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55% duty cycle? Is that right on?

Quote:
Originally Posted by TeKKiE View Post
Tuning beyond 8000 RPM. Need any more clarification than that?
^LOL!

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NA is a thinking man's game, alot of people dont have the stomach to play NA.
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#13 (permalink) Old 03-13-2009, 01:55 AM
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Quote:
Originally Posted by iczer200sx View Post
oh sweet, time to upgrade the valve train!! same story for the b14??
Looks like it took about 13 minutes to "spot it!" to iczer200sx!

Bench test results are good so far. A couple of the benefits will be the ability to tune past 8000 rpm, and setting functional rev limits beyond 8000. Are there any more? hummm....

Stay "tuned" for more details!

Cheers,
Dave

NismotronicSA Tuning Package/Powered by TunerCodeSA
Speed-Density Tuning for Nissans
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#14 (permalink) Old 07-07-2009, 11:31 PM
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A little history:
Calum brought the issue of the 8012.5 RPM limit to my attention last year saying that if I could figure out how to fix it, a number of people in the community could benefit. Once resolved, we naturally started asking ourselves; Why would the Nissan engineers impose this RPM limit? After many hours (actually days) scouring the code for possible ramifications, and also running an ECU on the bench to very high RPM levels, no apparent problems were found. This does not mean that none exist! (See Caveats below)

What the mod does:
Basically it removes the 8012.5 RPM limit, such that the RPM value used to compare rev limits, perform fuel and timing map lookups, calculate TP, etc., is allowed to increase above 8012.5 RPM when the engine actually revs beyond that.

What the mod means:
The simplest and easiest to implement benefit of the mod is to be able to set rev limits above 8012.5 RPM that actually work. Another benefit is the ability to tune fuel and ignition maps above 8012.5 RPM. This a little more involved, in that it requires the user to 1) rescale the fuel and timing RPM scale tables to expand the RPM range and 2) to re-tune the fuel and ignition maps accordingly. If only the scales are expanded, the fuel and timing maps will be offset such that the map value at what was 8000 rpm is now reached at something less. It also obviously means that the RPM must reach the upper end of the rescaled values in order to use the map values in the far right column. Therefore, after rescaling the RPM scales, the values in the maps must be changed accordingly, or you will probably run lean and retarded throughout the RPM range.

Another aspect that may need to be considered is TP (theoretical pulse). Most of you already know that TP ~ K x Q/N where K is the injector K constant, Q is the air mass flow rate from the MAF VQ table, and N is RPM. Without the RPM mod, N stops at 8012.5, which means that TP continues to climb relatively more quickly as Q increases with RPM (if it actually does with your setup). This tends to automatically richen the AFR. With the RPM mod, N continues to climb with Q such that the TP calculation stays balanced, as long as the MAF sensor doesn't max out. What this means is that the TP scales for the fuel and timing maps, along with the TP Max table, may also need some adjustment.

Caveats:
A couple of obvious ones, that don't really have anything to do with this mod are 1) your MAF sensor does not peak below your desired max RPM, and 2) your injector duty cycle at the higher RPM stays within reason. Caveats that do pertain to this mod are potential, unforeseen issues which may arise at the higher RPM and TP values. There are many tables that are indexed by RPM and TP, and neither Calum or myself have the facilities to test every possible combination. The bottom line is that you and/or your favorite tuner will be responsible for utilizing this mod as you see fit.

All that being said, this is really exciting stuff, as Calum with the RTV2, and myself with TunerCode firmware bust some of the myths surrounding tuning with OEM Nissan ECUs. I can't wait to see how the Nissan wizards among you utilize the capabilities we're working on to your benefit. BTW, when you purchase a Calum RTV2, the TunerCode firmware (which includes this RPM mod, and much more) is included! Also, the TunerCode firmware is available separately and will work with any supported ECU (details soon), however you will need the RTV2 board to take advantage of the extra I/O capabilities it provides.

Cheers,
Dave

NismotronicSA Tuning Package/Powered by TunerCodeSA
Speed-Density Tuning for Nissans
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#15 (permalink) Old 07-08-2009, 12:37 AM
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Good stuff Dave/Calum!

Too bad my KA will not take advantage of the RPM mod anytime soon...

It probably was a good thing I sold my V1 RT ecu. Soon I'll be sending another ecu(Cali spec) for the V2 board
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#16 (permalink) Old 07-08-2009, 01:13 AM
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calum i sent pm. you seem to be hardly on the forum
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#17 (permalink) Old 10-18-2009, 09:27 PM
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First release of TunerCode features listed at http://www.tunercode.com/
(Ugly web site)

Screen Shot...


Dave

NismotronicSA Tuning Package/Powered by TunerCodeSA
Speed-Density Tuning for Nissans

Last edited by dfddfd2; 10-19-2009 at 12:10 AM.
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#18 (permalink) Old 11-03-2009, 11:44 AM
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Any chance of one day being able to switch from MAF to MAP?
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#19 (permalink) Old 11-03-2009, 12:15 PM
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Quote:
Originally Posted by ghostchild316 View Post
Any chance of one day being able to switch from MAF to MAP?
Yes, with the addition of an IAT (intake air temp) sensor, preferably inside the intake manifold.

Dave

NismotronicSA Tuning Package/Powered by TunerCodeSA
Speed-Density Tuning for Nissans
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#20 (permalink) Old 11-04-2009, 05:09 PM
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Quote:
Originally Posted by dfddfd2 View Post
Yes, with the addition of an IAT (intake air temp) sensor, preferably inside the intake manifold.

Dave
Awesome! The Z32 maf looks dumb on my 4" intake tube! lol...

Also wondering if you're keeping the fuel/timing tables 16x16?

How about being able to switch from distributor to coil on plug setup? Or would swapping to a S13 SR20DET ecu be better?

I'm asking questions because I'm debating if I should stick with the RT ecu and/or upgrade to V2, or keep waiting for the MS PnP kit to become available and switch to that...

I'm currently running a RT V1 S13 KA ecu on my turbo setup.
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