Hi

 

Just had my car tuned with nismo on E85. I got 422 rwhp and about 550nm torque. The person that tune the car said the injetors maxed out at 1 bar (615cc). Isn't that a bit low for the injectors to be maxed out at 1 bar and 422 rwhp? Nismo was used when tuned.

 

fast listing includes

engine rebuild set from z1

gt600r turbos from z1

nismo 615cc

z1 smic

doolz

forged internals

2.5" exhaust all the way

 

He said there were some problems with nismo. He was not sure if it was software or hardware? He said he should send me the log... Just have to wait for that.

 

What do you guys think? isn't it a bit ow with 422rwhp on E85

sorry, a bit tired here. ment nistune, not nismo

I would have expected more to be honest.What was the afr on full boost ? you may need a new fuel pump or have fuel pressures issues.

My old aem sensor was bad. Just installed a new one today. Haven't had time to check what the afr is on full boost yet. But shows 0.85 / 12.2 with 1000rpm when engine hot and 0.9 / 13.3 at 2000rpm when i reved it.

 

I'll to a test tomorrow and log the result in datascan or nistune if I mange to find how to do it in nistune...

had a run today. at full boost the afr is 12.7 - 11.

 

another thing is when cruiseing in second the afr is 12.5. in third about 13.5, fourth 14.7 and fifth around 16.

 

I logged a run in datascan. also in nistune.(rpm,maf,injector duty and one more) if anyone want to check it for me. I can also download the info from the ecu with nistune if anyone could take a look at it and tell me if everything is ok or not with the tuning that pbz.se did.

Here is the info I got from the tuner:

(he wouldn't send me the bin file from nistune. said it could fall into the wrong hands...

Can I download it with nistune?)

 

 

Issue:

Injectors are up to 100% duty cycle. It is not safe to drive like this. The fuel system needs to be upgraded.

 

cailbration of Nistune bugs and do not allow full control, although all the interference features in the context of a mapping had been disabled in the context of mapping, eg closed loop lambda control and limitations in min and max. spreader times.

 

This may be due to one of the following:

- Incorrect installation of Nistune the OEM ECU

- OEM ECU is chipped before and it can interfere Nistune

- Loose wiring in the original wiring harness

 

Sometimes it works all the settings in Nistune, sometimes only works one, spread scale.

 

Sometimes the car goes badly at low loads, such as around idle. The error is common when you have problems with the ignition coil or ignition amplifier. Should be checked and corrected.

 

The engine dies when going off throttle. This is probably due to open dump valve when the ECU uses the MAF sensor to calculate the fuel mixture.

 

The motor does not react at all to Nistunes idle settings. Never, not even when Nistune sometimes communicate securely with div. other values, so they do not.

 

Max turns and maximum load increased in Nistune so we can get better resolution on mapping in more power.

 

My recommendation is that you mount a Haltech Platinum Pro plugin while you upgrade the fuel system, we'll do it properly next time. 500Hp should be no problem.

that's about right actually, E85 needs about 30% more fuel delivery.

 

Normal rule of them is injector size is good for about the same rwhp, eg 550cc are good for 550rwhp

 

so 615cc -30% is around 400 so good for approx 400rwp. Very rough but gives you an idea

that's about right actually, E85 needs about 30% more fuel delivery.

 

Normal rule of them is injector size is good for about the same rwhp, eg 550cc are good for 550rwhp

 

so 615cc -30% is around 400 so good for approx 400rwp. Very rough but gives you an idea

 

Thats interesting..

 

There wont be a definitive answer to this, but at what % do you ideally want to run the injectors? I assume it isnt a case of the lower the better or we would all be using 1000cc injectors.

 

I will be running Nismo 555s. I'm worried i might be close to maxing them.

 

Sorry for my ignorance, what is E85?

E85 is 85&% ethanol and 15% normal fuel.

 

I downloaded the rom image from the ecu before I delivered it for tuning. Anyone know how to compare the ROM image from before with what he has done?

 

I used Resync from ecu and loaded the old rom image from ashsped. But when I look at the fuel map it look just the same??

> Isn't that a bit low for the injectors to be maxed out at 1 bar and 422 rwhp?

 

sounds about right.

615 cc injectors should be capable of around 400 whp on E85 at a 85% dutycycle

420 whp is pushing it already and the injectors will be maxxed out.

 

> had a run today. at full boost the afr is 12.7 - 11

 

make sure the sensor (scale) has been calibrated for E85, as AFR scales are (very) different.

stoich of E85 is around 9.7:1, while for regular petrol it is 14.7:1 !

max power for E85 for turbo engines is at around 6.5:1

 

So if your current sensor has been calibrated for E85 and you are running ~12 AFR's, you will be running too lean ! (although E85 is more forgiving and it has a high detonation limit)

 

> but at what % do you ideally want to run the injectors?

 

safe max is at around 85%..