Educated Guess At The Final Tune Results

[Duncan]

2 hours ago, GTRNUR said:

One more thing, my fuel temps dropped 15 degrees when I changed from constant pump speed to injector duty based PWM pump speed.  Well worth doing.

Interested in the impact that 15o has on fuel, I found no solid information last time I looked around.  What temp should fuel be, what happens as it gets hotter, and what is too hot?

[fatz]

98 it doesn't seem to do shit

 

e85 she get hot and leans out a bit

 

small cooler fixed it in my r33

 

staged pumps also helps

[Nismo 3.2ish]

1 hour ago, fatz said:

98 it doesn't seem to do shit

 

e85 she get hot and leans out a bit

 

small cooler fixed it in my r33

 

staged pumps also helps

The pumps were supposed to be staged to stop the fuel getting hot.

One of the first thing that was looked at when I first went to the shop , I was asked where the surge tank was and when I showed him, he said feel the surge tank and it was pretty hot

Does hot fuel interfere with the tune, could this be a reason it was spiking on 85. it was OK on 98 ?

[fatz]

Yea e85 doesn't like to get hot or it will lean out but you will be amazed how lean it can run before it melts a piston

 

 

98 even slight lean outs = melted pistons

 

I  logged it in my gtr and after three laps you can watch the afr getting scary

 

like I said a small cooler fixed it

 

[Nismo 3.2ish]

2 hours ago, fatz said:

Yea e85 doesn't like to get hot or it will lean out but you will be amazed how lean it can run before it melts a piston

 

 

98 even slight lean outs = melted pistons

 

I  logged it in my gtr and after three laps you can watch the afr getting scary

 

like I said a small cooler fixed it

 

I am sure your car cops heaps more than I will ever do with mine, Micko and Paul is another thing, lol

Going to do some laps with Paul after it is done and dusted, has to be better than dodging potholes

[fatz]

The irony of taking advice from 3 blokes who don't have running cars is not lost on me

 

lol

[Nismo 3.2ish]

26 minutes ago, fatz said:

The irony of taking advice from 3 blokes who don't have running cars is not lost on me

 

lol

Hahahaha!

Now thats a bit harsh, lol

But the Pig is only a couple of months away now and it will be amazing !!!!

Micko just has to get off his BUTT, sorry Mick, I luv ya xxx

[Dose Pipe Sutututu]

23 hours ago, fatz said:

Yea e85 doesn't like to get hot or it will lean out but you will be amazed how lean it can run before it melts a piston

 

Why no closed loop correction in heavily load areas?

I set my closed loop all the way to 2 bar.

[Mick_o]

4 hours ago, Dose Pipe Sutututu said:

Why no closed loop correction in heavily load areas?

I set my closed loop all the way to 2 bar.

I think you know the answer to that! ?

[fatz]

15 minutes ago, Mick_o said:

I think you know the answer to that! ?

2 bar I Don't party as hard as you blokes 

I could have got some flash computer and talked about epic closed loop control..... or I could just install the 300 dollar cooler and be done with it back on track the following week

 

my car was back on track the following week

[Mick_o]

2 hours ago, fatz said:

2 bar I Don't party as hard as you blokes 

I could have got some flash computer and talked about epic closed loop control..... or I could just install the 300 dollar cooler and be done with it back on track the following week

 

my car was back on track the following week

That comment wasnt directed at you fat man. ?

In saying that your car is a filthy dirty track whore ?

Not everyones car is lol

 

Edited March 27, 2017 by Mick_o
Because edit

[fatz]

2 minutes ago, Mick_o said:

That comment wasnt directed at you fat man. ?

In saying that your car is a filthy dirty track broad minded person lol. 

Not everyones car is lol

 

yea not having a crack just stiring you lads up

[Mick_o]

Haha all good mate love a stir. Damn SAU & its auto correct... Broad minded person lol... ?

Expected more shit to be slung big fella lol.... Off the piss or something? ?

Edited March 27, 2017 by Mick_o
Because edit

[Lithium]

On 26/03/2017 at 3:31 PM, fatz said:

staged pumps also helps

Controlling fuel pump speed with PWM ftw, imho.   Should be able to run MASSIVE pumps and have the fuel get no warming than with a stock fuel pump if you run the right amounts, you should be able to have headroom the whole way through so the regulator is still always busy but without nuking the fuel.

On 26/03/2017 at 5:14 PM, Nismo 3.2ish said:

Does hot fuel interfere with the tune, could this be a reason it was spiking on 85. it was OK on 98 ?

Definitely.  

17 hours ago, Dose Pipe Sutututu said:

Why no closed loop correction in heavily load areas?

I set my closed loop all the way to 2 bar.

That is putting a lot of faith in that system.

[Dose Pipe Sutututu]

1 hour ago, Lithium said:

That is putting a lot of faith in that system.

It is, however you tune it so it's nearly 100% at the AFR you wish and then allow maximum of sat -/+5% correction either way. 

I've been doing this for all the cars I've tuned for the track and "seems" successful, besides mine which exploded on the street lol.

Ideally fuel should be trimmed via baro, iat, and fuel temp but at times budget setups don't have the necessary sensors we all wish for.

[Nismo 3.2ish]

Well finally after sorting out many problems they started to tune it up today and have a run on 98 at 20psi , next week they will turn it up a bit and fine tune it.

I will put the final tune results next week, here is the Dyno run on 20psi

Should look mad on E85

NISMO1 98RON 20psi 2.pdf

[Nismo 3.2ish]

After a long time and many negative and positive helpful hints and told to buy a V8 by a few , they said I would never be happy with the 34 , but I like the Skyline and just wanted this somewhat heavy 2.6Lt car to have some more torque to make it get going earlier.  a few pissed on me about going on about RESPONSE!. I was also told on the first page no one would be bothered to reply or read the thread , but 116 sometimes very boring pages later we are at an end , this will make many happy, but as I said at the getgo, don't like it, don't read it, piss off, many did, lol

The top end power has dropped down from the earlier tunes , 1st 475kw, then 461and now 457kw but it is more the car I wanted, response!

Micko has pick it up and bringing it up with Paul on the weekend, hope it makes it home in one piece and there goes my liver after a few days with these alcoholics 

                                                                                          

 

 

 

[Mitchee]

Been following this since the beginning. Good on you for sticking with it.

 

2 years to the day since you started this thread!

[fatz]

Overlay with prcision

[Piggaz]

3 minutes ago, fatz said:

Overlay with prcision

Here is as it came in PTE at 20 psi in 98 vs EFR at 20 psi on 98.

Red = EFR 8374/1.05 TS

Blue = PTE 6266/0.84 TS