Hondata

I was tuning someone last weekend with a build NA b18b motor. he said that power would stay strong past 8k rpms and would die off by 9k. I didn't believe him, but said ok. Well we start to tune and sure enough the cams are very strong to 8k rpms, where they start to fade off. My question is, how do I tune for the 9k rpm range. The torque is dropping off and there is less fuel needed than at 8k, I also want to decrease timing from where it is at at 8k rpms.

so is there a way to have extended rpms at 8k? I know when you extend the rpms, it only adds rpms to the high cam, not the low per hondata.

Tell the ECU it is VTEC ECU (even if it is not), set VTEC at a nominal rpm (e.g. 5000 rpm), disable the VTEC pressure switch.

Use the low speed table to 5000 rpm, then use the high speed table. The only trick is to remember this while tuning.

Hondata wrote:Tell the ECU it is VTEC ECU (even if it is not), set VTEC at a nominal rpm (e.g. 5000 rpm), disable the VTEC pressure switch.

Use the low speed table to 5000 rpm, then use the high speed table. The only trick is to remember this while tuning.

makes perfect sense, will the datalogging switch tables at the 5k rpm point as in normal vtec maps?

either way, that now clarifies why there is the different vtec check boxes. i always wondered why there were so many different boxes to disable.