"Parmas" Motor

[cali yaris]

.4mm is .0157 inches. Mine were gapped at .028 and we brought that down to .024 when tuning on the dyno. I think your gap is very tight!

A/F on my car:
Idle: 14.1-14.7
Cruising: 13.0 - 13.5 is the range I've seen, more or less
under boost: 12.5 down to 11.7 at full boost, depends on load etc.

hope that helps.

[Parmas]

Originally Posted by cali yaris

.4mm is .0157 inches. Mine were gapped at .028 and we brought that down to .024 when tuning on the dyno. I think your gap is very tight!

A/F on my car:
Idle: 14.1-14.7
Cruising: 13.0 - 13.5 is the range I've seen, more or less
under boost: 12.5 down to 11.7 at full boost, depends on load etc.

hope that helps.

What Brand are the plugs? Thus this gap difference might be related to octane difference? I am running 90 octane so sure your fuel ignites better so thats what might the gap serve for!

Thanks for that afr reading garm, I never seen 12s on either level! BTW you are sure that these readings are good for lower octane level fuel?

What do you think about the TC injectors Garm? Do you recommend these for my setup? Is there anyone using them on his motor?

[Blown_xa]

the tC injectors (factory) would be ok for low boost. I was not able to get past 149whp with them as they maxed out. Seeing as you have a return set up im thinking they can put out more juice.

As far as AFR ratio and octane rating, timing is what is most important to optimize power and to prevent knock/detonation. The only way to optimize timing is on the dyno though. AFR should be targeted the same regardless of octane rating.

We tuned 2 customers tC's for 400whp, one with 91 octane (what was readily availible to that customer) and one with 93 octane. AFR were the same, timing is what has to be adjusted(less timing for 91)