03 evo
built block
Magnus v5
Fatfab 6262
aem ems
e85 with fic 2150's
non cdi cop

Ever since I put this 62 on and turned the boost up I have been having problems with spark blowout. I had only been able to turn it up to 32-34 psi and was going through plugs every few 100 miles. I use a ngk bpr8es gapped to .018

The other night I wanted to try a known good coil setup as I was beginning to think I had a weak coil on mine. I tried a non cdi cop that was known good. I wanted to try it with the plugs that were being blown out around 34 psi on my coils. We went out and made a pull, clean. Turned the boost up to 36-37 made a few more pulls and it was clean. Left his house and went out for some pulls. The boost was spiking a little but noting crazy. It was missing out a little at first but got progressively worse as the night went on. By the end of the night I wasn't able to make boost at all without it breaking up. Other than at wot the car didn't seem to have a misfire.

I pulled the plugs last night and here are the pics. Does anyone see anything wrong?


plug 1



2



3



4




Last night I put 4 new plugs in at .018 Boost at 37-38 on Fathouse's coils

6 pulls before a little break up was noticed. I only did one more pull after initial break up and it did it again but worse. Other than wot and right after the break up the car runs and drives fine. Any suggestions guys?

 

Well I am having the same issue as well above 34 psi and from what I have read and discussed with my tuner is that the stock ignition isnt holding up with that much boost. You can reduce the plug gap but that still may not solve the problem. I just bought a spark tech non cdi and will be here this week. You said you used a non cdi cop right? If so you need to open the gap to about 30 when running that cop set up.

 

Incorrect info on your plug gap. I was on the sparktech non cdi.

The problem was the plugs. With ethanol a br9eix is needed in the evo8 making the power Im making. I am still at .020 on the ir9's. Thanks though.

 

I agree that the stock ignition isn't holding up and that is most likely the issue, as for your test the other night I am not sure what could have changed. You just have to go at the problem on both fronts, so you put on a non cdi ignition try a high current CDI setup. Try swapping out the plugs too if you think that is the issue, but I don't see that as being the problem.

I have my plugs set to .020 on the ngk iridum's for my E-85 use also. I am running a Dynatek CDI setup with big Montero coils and I don't have a problem with spark blow out. How much power are you putting down? 35 psi shouldn't be an issue, that is what I am running also. Just have to replace things in stages until you find the culprit. Most likely need a stronger ignition, however...

 

Spark tech

 

plugs fixed it. per shep and marco and a few other trusted sources all said the bpr8es at my power level and on ethanol wouldnt work for very long. Thats why I could make 6 or so pulls then start having issues. When its repeatable you start to understand that its not the ignition system. I'm running a lot more boost now with the br9eix without issue on my non cdi cop.

buchneri you also have an evo 9. which take different plugs anyways. Why would I purchase a more expensive cdi setup when I tested a non cdi setup off a car that is making over 800? I really appreciate the help but not totally understanding the problem and telling someone to spend $1000+ to trouble shoot a problem seems a little bit out of place. What if I was someone inexperienced and listened to your advice? Is telling someone incorrect information causing them to spend a ridiculous amount of money ok? Im not ****ty, I just really dislike all the misinformation that gets spread around forums. I do appreciate you taking time to help.

 

How much hp are you running exactly because im currently running a 3076 but i have an HTA86 im gonne be putting on as soon as i get the motor built and i run the bpr8's now with a sparktech non-cdi so i wonder if i am gonna have to switch to the 9's. I will not be running e85 but i do have a methenol injection kit that i will be installing with the HTA.

 

ok I called spark tech today and talk with them about the blow out. They recommended the Br9eix plug for E85. He said that the BRP8ES should be fine on pump and they are only a couple bucks a piece so that helps. I cant remember we talked for a minute but I am pretty sure he said you can open the gap up on the plugs if youre running the sparktech cop non cdi, I need call them back and verify

 

are we talking about missfire here?

 

no, problem solved.

 

I know
I was wondering if you were talking about missfire or something else.

 

No

 

boost kills/extinguish spark scenario?

 

no

 

would be easier to explain than just typing NO