[e.n335]

Hi,

Is there a risk to use this combination with the PROcede V1.47 standard or LBT map ? In my understanding the most important thing in FI applications ( beside avoiding detonations ) are proper AFR settings.

Any feedback appreciated.

Thanks
- Eugen

[zenmaster]

What's the best way to determine if you are avoiding detonations?

[e.n335]

Using top brand and high octane gas and avoiding high IAT's. The stock intake and FMIC do a good job already, the Spearco FMIC will do a better one. I am using the PROcede V1.47LBT map since quite a while. Beside I would like to have more power I consider this as a safe tune. I have zero problems.

[zenmaster]

Originally Posted by e.n335

Using top brand and high octane gas and avoiding high IAT's. The stock intake and FMIC do a good job already, the Spearco FMIC will do a better one. I am using the PROcede V1.47LBT map since quite a while. Beside I would like to have more power I consider this as a safe tune. I have zero problems.

But what I was asking was what is the best way to determine if you are avoiding detonation, not what is the best way to avoid detonation. Any idea?

[bnj]

Afr ratios must be ok. And definitive way is to listen for the knock at dyno hood open and head deep down in your engine bay. Extremist puts a microphone close to the engine and wires the speaker next to the AFR meter that has alarm for lean figures. As far as you don't hear the knock you are fine.

[bnj]

Eugen, get it dynoed and asks the dyno guys opinion or study the AFR stuff. Dyno at cool fall weather when oxygen density is high. You should be safe. (If not, buy JB2 )

ps see that they listen for the knock.

[zenmaster]

Originally Posted by bnj

Afr ratios must be ok. And definitive way is to listen for the knock at dyno hood open and head deep down in your engine bay. Extremist puts a microphone close to the engine and wires the speaker next to the AFR meter that has alarm for lean figures. As far as you don't hear the knock you are fine.

Definitive? So if it doesn't knock under limited dyno conditions, it's not going to knock on the road?

The conditions tend to be very different from a dyno to actual highway driving - for example, varying ambient temperatures - is the tuner going to dyno a hot car? Also, on the road there is varying load due to things like hills and fat passengers.

[e.n335]

Originally Posted by bnj

Eugen, get it dynoed and asks the dyno guys opinion or study the AFR stuff. Dyno at cool fall weather when oxygen density is high. You should be safe. (If not, buy JB2 )

ps see that they listen for the knock.

Thank you

Cheers
Eugen

[bnj]

Zenmaster you are right, the word definitive should have been a bit later i.e. If you never hear the knock. You can be quite sure about it though if you log AFRs in the worst conditions and they are on the rich side.

[zenmaster]

Originally Posted by bnj

You can be quite sure about it though if you log AFRs in the worst conditions and they are on the rich side.

Well that may be oversimplifying things, as the key would be to understand and to reproduce "worst conditions". Such conditions would depend on the operating requirements of this unique engine. Presumably, you don't want to have to run rich under any conditions - that is, to provide a "safe" tune. From what I gather, this direct injection has very precise control over fuel delivery. So if this same control is offered to a piggyback, it may actually be possible to always provide close to ideal AFR.

[e.n335]

Originally Posted by zenmaster

Well that may be oversimplifying things, as the key would be to understand and to reproduce "worst conditions". Such conditions would depend on the operating requirements of this unique engine. Presumably, you don't want to have to run rich under any conditions - that is, to provide a "safe" tune. From what I gather, this direct injection has very precise control over fuel delivery. So if this same control is offered to a piggyback, it may actually be possible to always provide close to ideal AFR.

We should not try to be more holy than the pope here. I have got very good input from bnj which is really helpful for me. If you can provide better feedback, please feel free to do so, I would appreciate.

V2 will offer more control and more flexibility. The concern has been my OP.

Thanks,
- Eugen

[zenmaster]

Originally Posted by e.n335

We should not try to be more holy than the pope here. I have got very good input from bnj which is really helpful for me. If you can provide better feedback, please feel free to do so, I would appreciate.

V2 will offer more control and more flexibility. The concern has been my OP.

Sorry for the hijack. The intent was to show that as far as correct AFR, it is a guess or a hope as long as you are unable to measure or understand what is appropriate for the engine. The point is, running rich on this engine probably has different consequences than for others, as it was designed to run lean. Keep in mind, we're also seeing possible evidence of fuel contamination in the oil which presumably could worsen with a poor tune.

[Boostin335]

u should be fine