I have a quick question. With cost put to the side. Can one install the Technesquare ECU and still use the VAFC-II to adjust the fuel map? It sounds simple and I think its possible since the VAFC is making corrections after it recieves information from the ECU. Also, would timing be affected.

 

http://forums.maxima.org/showpost.ph...1&postcount=66

With respect to timing, what exactly do you mean?

 

Well I'm about to buy the Technesquare that is for auto. It has the 7200 rev limit, timing advance, and a fuel map for I believe the MEVI. I have a 00VI and want to know if I can still adjust the fuel map so that I can optimize my A/F ratio. I'm also planning on dropping the 3.5 cams.

I'm not too inclined on the timing side, but I would figure as long as I keep it around 13.0 to 13.2 I should be fine right?

 

Should be fine.


Use higher octane and go up to 13.5 - 13.8.

 

don't see why it won't work.

 

This is what I was thinking. Its going to be interesting to play around with. My goal is to push this setup over 200 hp and tq and on an auto.

 

I thought Technosquare was unable to raise the rev limiter on the 4th gen Ecu's!?

So the reason you would be keeping the ECU is primarily because of the raised rev limiter and the advanced timing, right?

Hmm.. this is interesting... I was thinking of selling my T/S ECU and getting the VAFc II. So would it benefit me more to just keep the T/S ECU and get a S-AFC?

 

From what I know there's only a few ways to raise ignition. From mild to aggressive:

Increase Fuel pressure...lean out with piggy back, JWT or Technesquare ECU, or Emanage Ultimate.

A lot of the time cost is a factor in choosing the right engine management system.

The TS Ecu I'm getting is a rare one.

 

it is a rare one, they were able to crack the rev limiter but there was some stipulation I cant remember. Only a few were able to get this raised limiter.

The ecu with the raised limiter and advanced timing will be helpful, then fuel adjustments on top could yield a good end result.

 

I'll find out what the stipulation will be. Probably cause me to get another engine. I need to get ARP Rod bolts first though, maybe the 3.5 oil pump.

 

i'm still trying to find out exactly what my T/S ECU consisted of. Does anybody know about the Cheston Mod?? I have Ceaser's old ECU. I've contacted him but he's going to look into it. All I know is that when I put it in my 3.0, the car pulled like crazy in 3rd gear.

LOL... just when I'm thinking of selling it, this thread pops up! It's like a sign for me not to get rid of it.

 

u talking about higher octane as in 93?

 

What he's saying is I should be fine with a A/F tune of 13.0 to 13.2. But if I want to go leaner and get more HP than I could put higher octane and lean it out even more.

 

Bump for an update. I installed the TS Ecu and did three runs datalogging with my wideband. I also tuned my A/F during my three runs. When comparing the last run with the first run I am confirming that you can indeed adjust the A/F ratio to your liking. Infact the TS A/F was a little too conservative for my liking.

I still need to do a few more runs to smoothen out some points I have in the high 12's. However, to my dissapointment I thought I could rev to 7200 rpm but its not happening. I'm getting only 6115 rpm on Vafc and WB. This may be from a constricting exhaust. I only have a y-pipe and B-pipe. Before the B-pipe I was only able to go 6015 rpm.

Now I need to datalog the timing with the Auterra.

 

6115 or 7115?

The exhaust would have no affect on rev limit. Power made at rev limit, yes, but rev limit itself, no.

If you are referring to 6xxxRPM and not 7xxx, then:

Are you auto ? If so, the TS wont shift @ 7200, you have to hold the gear manually until then (7.2k)since TS only alters the engine fuel map (& effectively fuel cut). It does nothing to the TCM, which controls shifts & shift points.

Test it by revving it in neutral & park, then verify rev limit.

Reason I bring this up is because if left in "D", it will shift @ ~ 6k.

 

I'll test it in park. I stand corrected when I say 6115. Yes, I'm auto. The TS ECU I have apparently was a rare one with an extended rev limit specifically for auto. But, I will try it in park like I said.

I'm going to look into the shift-fast-auto switch. This may help me with the limited rev limit auto's have.

 

If you did in fact mean 7115 and not 6115, then my previous post is invalid.

 

I reved in park. I didn't step on the throttle all the way down but it seemed like the tack was bouncing off the rev limit. It went all the way to 6,406 rpm.

Would a TPS affect rev limit? I think my TPS is not fully calibrated. On my WB I'm only getting 3.79 volts at WOT and the FSM says 4 volts.

 

it will take a steady hand but you can get it to 4v, or as close as possible.

 

can any one post link where to get VAFCII??? can't find it

 

+ VAFCII

 

I am not trying to be mean in all of this, but I think it would be more cost effective to install EU with the existing WB02 and sell off the VAFCII and T/S ECU.

 

What existing WBo2?

 

Are you referring to me? Well I'm not really thinking of cost right now. Maybe in the future I will sell things. To me I want to learn the limits first. Until than I am getting enough tuning with what I have.

I do see your point though, but oo well.

 

I just switched from the JWT & VAFC to EU but was having so much trouble at the time I was contemplating ditching the EU and keeping my original setup. But now everytime I come to a stop sign I find myself launching off the 2step just because I can. LOL
I'm sure that newfound joy will soon pass.

 

Were you able to tune with the JWT. From what I heard it wasn't possible. Only the TS you can tune.

 

96sleeper proved you CAN alter MAF signal w/ JWT.

 

I was able to adjust my AFR with it also

 

I have read that the TS ECU only works on automatic cars and only some to that extent. They never got it to work on the 5 speeds.

 

It's been covered what the OP needed.

 

I know but probably the reason on why he can't rev to 7200 rpm is that the TS ecu with that program only works on certain cars.

 

I agree. BUT:

I'm still not clear as to where he can't rev. He said he stood corrected about the 6115 RPM comment. Ok, what does that mean? What did you mean to say?

 

Well I tried the other day again in the Park position and reved it to 6800 rpm. That's with out stepping on the gas pedal all the way. When I say 6115 rpm is when I put the car in D and just do a WOT run. The TCM still shifts early. MY tack is showing a shift at RED line but both my VAFC and WB is showing identical RPM readings of 6115.

 

Well, the TS does nothing to the TCM. You'll have to hold the gear to get it to shift at the new fuel cut http://forums.maxima.org/showpost.ph...2&postcount=15

 

yep, figured that out. Thanks for the heads up again. I'm going to continue my research. Right now I'm already looking at the shift fast module.

 

I think we are going in circles, probably the reason on why he can't rev to 7200 rpm is that his car is not compatible with this TS ecu or playing devils advocate here, is that it was never programed for the extended rev limiter. For the 6115 redline, I have no clue on that.

 

Step on the gas all the way and see what it revs to.

 

Bounce the limiter in park.

I'm pretty sure it was deezo's old ECU, so I'm confident it can rev that high. fact of the matter is, he shouldn't post until he has 100% confirmation, i.e, leave it in first, + 100% throttle, +45mph, and see what happens, record max RPM reached. Or, the "P""N" WOT cycle.

The 6115 redline was not redline, but the shift point when left in "D".

 

Update:

I bounced the rev limiter both in P and in N. I got 6900 rpm on the Tach on my VAFC I got 6504 rpm. At first I'm thinking something is off but when I drive both Tach and VAFC are fairly accurate to throttle response. This is a mystery to me. I don't know if I have to add a capacitor to prevent any noise interference or what on the VAFC.

I'll update this post again when I do a WOT run in 2nd gear to see if the RPM holds.

 

The V-AFC is showing the actual RPM.