Tuning Issues/ E85 Ideas

[DJ-Static]

Hi, was wondering if anyone on here has had experience with nistune and the tuning software? i have it installed in my car and it works well but the guys i got to tune my car didn't do any of the fine tuning and if runs a little average til it hits boost. I was wondering if anyiny can give some advice?

Hi everyone,

I'm hoping that someone can help me with a flat spot that occurs whilst my car is cold (It's also a little harder to start in the mornings).

The Car:

R33 GTS-T, T04 turbo, Z32 MAF, Bosch Fuel pump, manual boost controller (bleeder), Splitfires, Nistune on a R32 ECU (s/w emulated idle switch for TPS)

In order to save some money I basically installed the ECU and MAF myself tweaked the K constant and drove to Turbo Tune (Melrose Park, South Australia)

The result:

Now I don't really have a clue when it comes to "tuning" cars, but from what I can tell the timing isn't advancing on low revs/temp.

Log file: Cold run CSV

ECU settings: BIN

I've basically put up with it since April, so if anyone can help I'd greatly appreciate it.

Cheers.

Thanks!

Edited November 1, 2010 by DJ-Static

[paulr33]

is there any more data in the logs? other sensors etc? like datalogit logs, heaps easier to read and more useful

i can see where it runs fine then all the timing drops to the floor, which i suspect is what you call running it like crap when cold

only thing i can think of is its running on an area on the map thats poorly tuned or has tons of correction

does nsitune let you do a map tracer like in the powerfc? try that and see what cells is referencing from?

[DJ-Static]

Oh yeah, i am intending to switch to E85 permanently as it is now available consistently and affordably from caltex, i will be wiring in a AFR meter as soon as i fix my cars midspeed,low throttle response issues.

[DJ-Static]

Thanks for the reply Paulr33, i do have the ability to trace a run and play it back, the nistune software allows everything a vipec/motec does except for the use of a MAP sensor instead of a MAF. the csv file plays back on any computer with the nistune software, so i was hoping someone else running nistune in a similarly configured vehicle would be able to do a comparison to their cars tune.

I guess if there is a tuning for dummies thread i should probably look it up, are you aware of any such thread?

[Brezza]

I'd just take it to a good tuner and tell them your problem and ask if they could spend a little more time tuning the other areas of the map.

I've only used turbo tune once years ago and I never went back after that. Wasn't happy with the tune, so I went elsewhere.

I go to Boostworx, I trust Shaun's tuning and havent had a problem to date with their work.

But maybe the only way to get this sorted is to pay a litle extra for some fine tuning rather than just getting a power tune done when they only adjust the cells referenced at WOT.

[paulr33]

agree on getting someone else to look at it

especially given you are playing with E85 as well

[DJ-Static]

Thanks Brezza, i went to turbo tune because simon from Morpowa was on holiday and a mate suggested turbo tune because he used to get stuff done at bill keen/ATS. I wanted a complete tune but i think the turbo tune guys thought i had no idea and thought a great powertune would keep me quiet. they have since closed down from what i have heard.

Out of interest what does boostworx generally charge, i am aware the particulars of the vehicle and the work required dictate the cost but i was wondering what the ball park is?

[STATUS]

Simon @ morpowa, PETE from Nistune are the only guys i reccomend in SA for nistune (person experience), there are other great tuners but these guys know nistune in and out.

Jeff @ speed lab and brenton from 4's & more are also good ive heard.

[D_Stirls]

Jeffs retired now and 4's and More have been telling the people i have spoken too that Nistune equiped ECU's will blow up their motor and that they should go for a full aftermarket ECU lol.

[STATUS]

Jeffs retired now and 4's and More have been telling the people i have spoken too that Nistune equiped ECU's will blow up their motor and that they should go for a full aftermarket ECU lol.

ah, least you can always go with the best... pete or morpowa.

[Randon_I_Am]

I had a look at your csv and BIN file.

So your saying it's running badly on pre boost? I noticed you didn't rev it past 4000 rpm on the whole run but the timing and fuel mostly look good.

there was a couple of strange parts in it where the load (TP) would rise and fall quickly in succession. were you doing this with your right foot?

Could it just be that your using a 32 ECU which has no VCT causing the flat spot?

[Randon_I_Am]

Is this the "Poor Running" you're talking about? ^

Other than that it looks like quite a safe tune, with a few degrees less than mine at low loads/cruise

Just noticed another thing that should have been addressed. Have a look here.

This is First gear, at 4000rpm. You're already over half way accross the map (left to right). TP(load) of 55 where your max TP(load) is only 115.

This tells me that if you put your foot down for a WOT run your max TP will go much higher than 115.

Basically it doesn't look like the timing map is (and fuel map is the same) are scaled correctly. As in at WOT the trace will slam hard into the far right colomn and be far from optimum.

So in all take it back to a tuner. Especially if you run e85. I put caltex's E-Flex (e70) into mine and after getting the fuel right my max TP(load) increased by 50.

[DJ-Static]

I was making the tp go up and down to demonstrate that no advance changes occurred while tp position changed.

The reason i did not take it over 4g is because when boost comes on car is great, i believe i have ruled out VCT issues because when the car is warm the flatspot gets better almost completely disappearing. If it was VCT related wouldn't i have the flatspot all the time?

[DJ-Static]

Thnaks random i am you are a champ! i plan on taking it to boostworx and showing them your astute advice and getting this rectified by a professional. Thanks for all your input guys, skylines australia is a hell of a forum

[Randon_I_Am]

OOOOooooooo. Not good.

I see where your talking about now.

Here the actual timing doesn't match the timing map.

There are a whole bunch of "timing tables" (I've only worked on my R34 GTT which does'nt have so many of these, and they're different). My bet is one of these tables is overiding the timing map untill the car is warm.

My advice would be to try get as much info from NIStune as possable about what each timing table does and work from there.

Cheers

[DJ-Static]

To show my appreciation for all the help I've received thus far, I've made a donation to the forum and will sign up to the SA Club.

Thanks again guys!

[paulr33]

it looks like an auto tune and the auto logic is trying to predict gear changes on the auto box

ie cut timing and dump it on the floor during gear

are you sure its a manual ECU that you have ?

[DJ-Static]

not sure, i assume it is manual ecu as that is what it was advertised as on the forum here. it was listed as a non-turbo rb20 ecu. I don't think temperature would effect the condition then if it was an auto?

[Randon_I_Am]

Good point about the auto ecu.

That could well be your answer.

If not, half of those Timing tables are to do with timing vs temperature...

[CoZZm0]

Post the P/N on the ECU (should be something like 23710-xxxxx) and it can be checked in the parts database to see what its off.