A spark plug's heat range has no relationship to the actual voltage transferred through the spark plug. Rather, the heat range is a measure of the spark plug's ability to remove heat from the combustion chamber. The heat range measurement is determined by several factors; the length of the ceramic center insulator nose and its' ability to absorb and transfer combustion heat, the material composition of the insulator and center electrode material.
I will be going with colder plugs than I use now. With E85 its recommended to go 3 steps colder than stock.
What gap for e85? (bpr7eix) Currently at .026, same as last set up but I now am getting missfires. What gives? I encourage the alcohol burners to chime in.
Ok, so I struggled with this a few days, but eventually got it working.
I'm using BR8ES gapped to .019, and I haven't had a misfire since the change. I'm hitting about 30psi down here at sea level with no issues, and that includes trapping 115+ in the 1/4.
Did you happen to log your racing sessions from today? And did the 19 gap help at all? I want to see if you're still knocking 5 times in that range we discussed earlier last week. How did it run today?
Erich, I can't log during autox runs - way too violent unless I manage to find a way to secure the laptop during the runs. I did log my first drag run, though, before my laptop ran out of juice. I've posted logs on EvoM in the EcuFlash forum that you'll probably be interested in seeing.
Brian (tobz) has been helping me with retunes all through the week, so we've eliminated the knock and actually had it very weak on timing the day I hit the strip, so we think there is still a good amount of power left to gain. However, we stopped doing the CO tune when I got down here and have only been working on the sea level tune. We'll resume the CO tune when the car gets back in a few weeks.
The .019 gap fixed everything related to spark/sputtering/. It ran like a raped ape today after Brian did one more early-morning tweak that focused on spoolup and boost response, since that's most important for autox.
Great!!! I'm glad to hear you're getting somewhere on the tune. Are you going to use Tobz from now on to tune it? I honestly don't think RP has the ability to tune Evos efficiently.
The bigger the gap you can get away with, the better, but that requires an ignition amplifier of some sort, which I think you have, right?
I have stock ignition, so the low gap is imperative.
Yep I have the Buschur unit but still run a gap of .020 on my bpre8's.. I think I have a boost leak as well I cant hold more than 2 psi in my lines when I test, It's weird as hell but I can boost all the way up to 30psi? I can hear the leak in my intake manifold. Any suggestions?
Yep I have the Buschur unit but still run a gap of .020 on my bpre8's.. I think I have a boost leak as well I cant hold more than 2 psi in my lines when I test, It's weird as hell but I can boost all the way up to 30psi? I can hear the leak in my intake manifold. Any suggestions?
Matt @ RP did a great job considering my plugs were still gapped upwards of .030 when they tuned it. They also were only responsible for getting that first tune on there, not for doing daily email updates via email - Matt has to work on cars all day at the shop. Brian was nice enough (and interested enough) to help me conquer this somewhat difficult task.
Using my JDM MR DV for the autox due to all the part throttle action, but then I'll put on the black one when I swap back.
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