transam69230

iTrader: (49)

I am curious to here some opinions one what plugs i should be running for this setup? Right now i got BR7EF in there gapped a .035. I know that e85 runs cooler but that really is just a benefit. I am planning on running a 150shot on this setup.

Should i go to an even colder plug or should stick with what I got? Or could i open the gap at all since e85 runs cooler? I am new to the whole e85 situation, it seems like its a whole new ball game with this stuff.

Car has never been dynoed, but has gone the best of 10.51@130 on a 1.47 60ft all motor.

Fbodyjunkie06

iTrader: (10)

BR7 is good starting point for a 150 shot. It is what I have been using so far on my 62N tune-up(150 shot give or take).

Is the gap .035 out of the box? I run mine at .028-.030 as of right now with no problems.

I wouldn't open the gap up any more than what they come gapped out of the box. If anything close them to .030.

Sounds like it runs pretty good on motor already. With tenth off that 60' it would really help getting it down track quick

Edit: I see you're at 13:1 CR? If that is true then I would start at a B8EFS plug for sure. I'm guessing you're running a BR7 right now on motor at that compression? Hell you should probably buy a set of NGK 1085's while you're at it(1085=B9EFS I carry all three heat ranges with me at the track from B7-B9)

transam69230

iTrader: (49)

Yea the compression is 13:1 cause of the e85 and trying to squeeze as much as we can out of it. I really would like to cut some 1.3x 60ft times but it is freaking hard getting it dialed in. Especially when I change **** all the time. I had 3.54 gears in last year and switch it up to 3.90s this year and whole new MWC 9inch. I hoping with the new gears it will get my 60ft down.

We will see what the tuner says tomorrow or saturday. I guess my fuel trims where all out of whack on the NA tune from last year so he wants to get those back into check. Once the NA tune is done we will be spraying it I hope.

355z28

iTrader: (8)

with that compression and E85 I would recommend going to a B8EFS gapped at .027-.028 that should be safe to 175.

Fbodyjunkie06

iTrader: (10)

At the VERY least the B8EFS and he should go ahead and buy some B9EFS and B10EFS while he is at it and plan on running them a lot sooner than later.

That much compression is going to have a narrow tuning window and the only way to keep it comfortable and give yourself room for error is with a colder plug.

E85 contrary to belief(*cough Mark Sullens *cough) and what is out there on the internet, (this applies to a nitrous application where we don't want to see much if any heat past the midway point between the tip of the strap and the bend of the strap)

E85 likes to burn cold we know this. So why not utilize that colder burning properties with a colder plug? Don't run it on the edge timing wise, keep the heat in the tip of the plug and use the nitrous to make the power. Use the fuel and plug to keep the combustion cooler.

I guarantee it makes more power this way than running it(E85) with a hot plug and dousing it with fuel.

tittan1500

iTrader: (8)

I agree, I dont understand why so many guys push the timing so hard.

355z28

iTrader: (8)

Im around 12.8:1 now, and plan on going 13.5 later in the summer.

I have 8s in now and will toss them out when I go over 150. On E85 I have found the I go faster with less timing, on pump gas where most people pull 3-4* I have been fastest with 6-8* and having the timing mark right above the electrode and no where close to the bend.

Of course the tune and setup varies on timing, but I have found this on a couple cars now.

10secZ28

iTrader: (6)

I concur with 8s at the least, I have a 12.8-1 408 on e85 and run #9's on motor.....also keep in mind that you DO NOT tune the car on e 85 as you would on gasoline. You will as far as timing is concerned, but as far as fueling it is very different (in regards to reading the plug)

Fbodyjunkie06

iTrader: (10)

This needs to be stickied.

355z28

iTrader: (8)

E85 is a learning curve on the bottle. There is not a lot of "Free" information that people are willing to give. I've been fortunate to have Dave at nitrous outlet take time to look at my plugs and listen to my setup to help get it dialed in. Even more so he is still learning E85 as well.

Austin

blackonblacksls

iTrader: (1)

I ran 15 degree on a 250 shot. With 14.67:1 compression all with a br7 plug. Melted the autolite 6 range plugs... On the same
Timing.

N2OBaby

I agree wow this is alot of good info.

Fbodyjunkie06

iTrader: (10)

And what did you learn from that?

blackonblacksls

iTrader: (1)

That you can run hotter plugs than most guys on the Internet say you can.

Fbodyjunkie06

iTrader: (10)

After melting a set down?

Really? You want to get into this again?

Fbodyjunkie06

iTrader: (10)

An E85 motor with nearly 15:1 compression ON SPRAY and you put a 6 heat range in it?

That's real smart.

10secZ28

iTrader: (6)

I have also been this fortunate to have that info from Dave

blackonblacksls

iTrader: (1)

It worked just fine with the 7s. Car runs better for what I do daily with the 6s, just didn't like that much nitrous.

I was spraying a 100shot on in. With the autolite 6 plugs. And the motor tune. no issues.

So yes 6 plugs. 100 shot. A lot of compression. And e85.

If I put a second kit on it. I would probably go to a 8 plug. But I would prefer the run the hottest plug I can as long as I'm using it as a daily driver.

I still don't understand why all the talk about cold plugs? Is it really needed? Or is it more of a safety/precaution?

10secZ28

iTrader: (6)

there is about a 140 degree difference at the strap each step colder you go which will help pull some heat out of the chamber, and also help avoid your plug tuning into a glow plug. A 6 is way to hot for your setup. I think everyone misunderstands what a plugs responsibility is, and that is to light the fire, but it still has to survive in that environment but if the plug can not dissipate the heat you now are prone to something that can cause pre-ignition. I would have a 9 in your motor if not a 10 and it might cost you 5 hp by going to that, so why not have the added safety cushion?

To answer the ladder part of your question, unless you want to keep burning motors down yes they are.

Fbodyjunkie06

iTrader: (10)

It's a pre-ignition thing which is why you melted the 6 range. The plugs tip was way to hot and it stayed lit after the spark was fired thus turning it into a glow plug in your combustion chamber.

You should be on a 7-8 plug with that much compression on motor alone. If it doesn't run right with that plug in it, it's not the plugs fault it's the tunes fault.

When I went to a B8efs on my 200 shot(10.25:1 compression) I had to go from 13.8-14.2 to 14.6-15.1 AFR at idle to help keep them clean and from 13.9-14.3 during cruise to 14.6-15.0 during cruise. Granted it was really to rich to begin with the TR55's on motor covered that up. A hot plug with a rich tune is just covering up a rich tune.

Lean that baby out it WILL make more power, but when you lean it out you have to pull the timing back and put a colder plug in it to take the tip temperature back down and put the heat on the tip of the plug where it should be.

As the guy above me said a step lower heat range lowers the tip temp 140*. That's it. No lost power, just a cooler tip temp. A hotter plug or a colder plug contrary to belief will not make or lose any power itself. The tune not being correct for that heat range plug will.

I hope this helps and I am not trying to ride your *** or make it look like you don't know what you're doing, but you could really be doing it a lot better and make more power.

With your compression, and a 200 shot I'd be on at least a B9EFS and honestly I'd have -10's on deck.