TTFS Dcan cable does not work. 540i e39 SC.

[Zep]

Some logs in one of my threads, but those are before my final pulley and injector I'm running now. Also my car is different ECU, pre vanos. Mcniblts was only one iirc that was similar to yours, but hes not around much anymore.


As Tp said, do not run your car at wot with AFR over 12.5.

If your on 42's, there should be plenty of fuel available if upper bins in tune are set correctly and fuel pressure is good. Mcniblts never upped his redline that high iirc, so I'm not sure anyone with your set up ever got a full tune from Frank with that redline. I may be wrong though.

I have the same setup as Mcgnms and have the same lean out after 6100rpm. I never got around to getting it sorted as some other crises emerged and such is life. Would like to get it resolved now though so have been monitoring this progress.

Iirc Marc had his redline at 6000 due to Frank not getting the fuel in. Not sure why he didn't get properly resolved as he physically took his car to ttfs. I think Brian had the same problem

[philly98540]

So no 6800+ rpm tunes fully working on the TU's? Interesting.

[dovlet]

I have the same setup as Mcgnms and have the same lean out after 6100rpm. I never got around to getting it sorted as some other crises emerged and such is life. Would like to get it resolved now though so have been monitoring this progress.

Iirc Marc had his redline at 6000 due to Frank not getting the fuel in. Not sure why he didn't get properly resolved as he physically took his car to ttfs. I think Brian had the same problem

Will try to ask Frank solve this.

- - - Updated - - -

So no 6800+ rpm tunes fully working on the TU's? Interesting.

Yes, this is the issue, hope Frank can solve it.

- - - Updated - - -

By the way, gearginder should have the same setup as mine. Is not it?

[dovlet]

Gents, yesterday was testing my car. Decided to stop all tests until remove all problems with lean. After 6100 rpm AFR is about 16-17. 100-200 kph was 11.5 sec. (Mine local made tune file for 3.8" pulley and 330cc injectors was running 11.3 sec 100-200 kph and had 12.5 AFR and out side temperature was about 10-15 degree Celsius).

Then, I loaded one tune file (I should use with this file resistor for 330om, in other case it is super rich) which holds 10-10.5 AFR when full loaded up to 7000 rpm. I had with that one about 10.25 sec for 100-200 kph and temperature was 30-35 degree Celsius.

Question:
Should I try lean AFR up to 11 or 12 by using resistor for 360 or 400om?
Is there huge impact to power difference in temperature?
Any other advise?

[dovlet]

Video from yesterday tests, 10.3 sec 100-200kph.

[dovlet]

Yesterdays tests with race logic showed 11.46sec 100-200kph (30oC) which is not good at all. My 3.8" setup with 330cc injector had 11.88sec but temperature was 15 degree C.

Does some one know Knocking sensors limit numbers? What is the number which I should not exceed.

[dovlet]

What is wrong gents? Any advise? By the way Philly, did you do any tests for 0-100-200, 100-200, 1/4mile, 1km etc.

[dovlet]

Ok, let me share with you some interesting findings. I managed to load on my ecu 2 files to two different ECUs.
1. Ecu with 10psi boost 42cc injectors 100-200kph 11.3sec.
2. Ecu with 15psi boost 42cc injectors 100-200kph 10.3sec.
Above results checked by video, of course using racelogic will give +1 sec at least.
So, my knowledge in tuning is only from books and internet sources which is just theory. What i have? I have 10psi and 15psi file. 10 psi file should have timing for example -17 degree before upper dead point. 15 psi file should have less timing than 10psi due to more pressure. So, if 15 psi file gave me better results than 10psi it means my fuel is not 95 octan (russian standarts). Lower octan need lower timing angel.

What do you think GENTS?

[dovlet]

Here is logger view for 10psi tuning file.
Capture.PNG

[dovlet]

Put resistor and results bad time. Looks like timing depends on air consumption as well. Also, i think our fuel is 87/89. Waiting for magic from Frank.

[tptrsn]

Yes, you can't really just slap a resistor in there and hope for the best. The resistor will cause reduced air flow levels to be reported at the same actual air flow. Load is calculated from airflow and RPM, so you will be reporting reduced load levels under the same actual conditions, and that means the DME will call for less fuel and more timing. It's a recipe for serious engine damage.

The fact that your engine is still in one piece is a testament to the resilience of these engines.

[dovlet]

Yes, you can't really just slap a resistor in there and hope for the best. The resistor will cause reduced air flow levels to be reported at the same actual air flow. Load is calculated from airflow and RPM, so you will be reporting reduced load levels under the same actual conditions, and that means the DME will call for less fuel and more timing. It's a recipe for serious engine damage.

The fact that your engine is still in one piece is a testament to the resilience of these engines.

Yes, you are right but i had a dream and hope that it will work. Now i have to wait for Frank few days. You even cannot imagine how it is difficult to wait for something which you do not know when it will be happen. That is why i am trying to check everything.

Regarding to engine resurces I am agree partially, i had not detonation there. Yes it is good engine with good resources but there a lot of better engines with more resources like 2jz, rb, ls and etc. Even if i had forged pistons i had not a chance if detonation is starting.

[dovlet]

Philly. Could you please check your 100-200 by video? I want to know what is the your time. I think every body will be interested on that.

[dovlet]

Yesterday tried vodka injection instead of water injection. Result is -1sec. So, if someone like me cannot find methanol then try use vodka.

[geargrinder]

I use a lot of vodka. Haven't tried injection though.

[tptrsn]

Vodka is so handy.

[dovlet]

I use a lot of vodka. Haven't tried injection though.

Bro, not only you. We have no meth any because it is prohibited in our Country. So, octane number little bit less than meth but still work well.

- - - Updated - - -

Vodka is so handy.

Yes, it is.

- - - Updated - - -

Does any one has idea about alternative liquids to inject instead of meth? One option is vodka, if some one has experience with some solvents or acetone will be appreciate your advise.

[geargrinder]

Over here you can find windshield washer fluid that is mixed w/ some methanol to keep it freezing down to -30 or something. Some guys will use that, especially if they use the washer reservoir for the meth injection. But you want to be sure it has methanol and doesn't have some other additives like too much soap or some special cleaners.

Google "water methanol injection windshield washer fluid" and you'll get lots of info.

[philly98540]

I was getting clogging in my nozzles when I used washer fluid. It was just meth and water and blue dye, but it left hard water deposit crusties in the nozzles. They llikely use plain tap water when its made.

I use only methanol mixed with demineralised water now. No issues.

Should be ok to use the washer fluid if you check your nozzles on some interval.

I like the vodka approach.

[JimLev]

Do you and GG have any of the 5 gal left?
I put a few ounces of Meth washer fluid in mine just to tint it to see the level in the tank better.
Vodka, good idea. One injector for the engine and another for the passenger??

[philly98540]

I used up your can a while ago. Lol. Thanks for giving it me and GG for custom delivery. Much appreciated. Many layers of tire removed in your honor.

[tptrsn]

One injector for the engine and another for the passenger??

Always thinking, aren't you Jim!

On the topic of the vodka injection, without doing any real math here, I think most vodka over here at least is something like 80 proof, which means 40% ethanol and 60% water, right? If true, I guess I would call that water/ethanol injection, which should be fine.

Years ago I remember some people using Isopropyl (rubbing) alcohol in solution with water for this purpose, and I **THINK** that might be what they used in some of the planes in WW2?

[dovlet]

Ok Gents,

Thanks for your reply. Now I am stuck. Yesterday I did 4 tests with next results below. All tests were going with no stopping.
1. 4th gear, no alcohol, 120-200 - 9.08sec
2. 4th gear, no alcohol, 120-200 - 9.95sec
3. 4th gear, with alcohol, 120-200 - 9.39sec
4. 4th gear, with alcohol, 120-200 - 9.73sec

What do you think why first test was better than others? I suppose to think that my spark plugs. What do you think GENTS?

[geargrinder]

Possibly heat soak or belt slip by most likely just the error range of your timekeeping precision.

[dovlet]

Possibly heat soak or belt slip by most likely just the error range of your timekeeping precision.

Bro,

How can I mitigate that slipping? What should I do? May be I need to put some kind of Philly did?