Melted BR7EF's VIDEO

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Jul 17, 2013 | 07:10 AM

89L98T56

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From: Albuquerque

Melted BR7EF's *VIDEO*

Took the car to the track for the first time on the bigger shot. Melted 2 plugs on the first pass. In the video you can see the car spit out 3 small pieces of glowing hot metal which I assume is the ground straps of #5 and #8 plugs. Compression and leak down test came back OK so thankfully I dont think I hurt the motor. Question is what do you guys think was wrong with my tune-up / setup?

408ci
13:1 Compression
Carb'd
E85
28* on motor
13* on spray
28N 28F direct port (250hp)
950psi N2O
6psi Fuel
NGK BR7EF
11.8-12.0AFR's on spray

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Jul 17, 2013 | 08:50 AM

nocooler

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From: Mid Michigan

IMO - 7's are a tad warm for 250. I'd be looking at 8's or possibly 9's.

Did you verify the timing was pulled?

Jul 17, 2013 | 09:00 AM

brandon@nitrousoutlet

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From: Waco, TX

Yeah the 7's were the wrong plug choice there. Go with 9's!

Jul 17, 2013 | 10:46 AM

89L98T56

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From: Albuquerque

Quote:

Originally Posted by nocooler

IMO - 7's are a tad warm for 250. I'd be looking at 8's or possibly 9's.

Did you verify the timing was pulled?

Yes the timing is pulled when the nitrous arming switch is activated. Flip the switch, car runs like **** on motor=timing pulled.

You guys think plug choice could cause this by itself?

Jul 17, 2013 | 11:31 AM

camscam02

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From: sacramento, CA

Quote:

Originally Posted by 89L98T56

Yes the timing is pulled when the nitrous arming switch is activated. Flip the switch, car runs like **** on motor=timing pulled.

You guys think plug choice could cause this by itself?

13:1 408 plus a 28 jet. Yes sir! I would of started at a 9

Jul 17, 2013 | 12:06 PM

89L98T56

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From: Albuquerque

Alright then I guess I'll throw 9's at it and leave everything else alone.

Jul 17, 2013 | 01:07 PM

Dynospeed

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Are you getting any oil in the combustion chamber? I don't have e85 experience so I can't comment on that. But I do feel you need -9 also.

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Jul 17, 2013 | 03:35 PM

Killer5.3

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From: Ms

Quote:

Originally Posted by brandon@nitrousoutlet

Once you swap plugs be sure to read them because you may be able to put some timing back in it. I figured you had so much timing out to combat the heat from the plug?

Yea it looks like the timing mark is well above the bend to me. OP compression like you have generates a lot more cylinder pressure = heat and then you add nitrous to the mix= more cylinder pressure & heat than a lower compression motor so it requires an even colder plug.

Jul 17, 2013 | 04:50 PM

#10

Carter01

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From: South Ga

Personally i would run 7s on motor in that car and 10s on 250. Everyone has there own twist to tuning but your plugs are extremely hot for that combo.

Jul 17, 2013 | 05:15 PM

#11

Nitro Dave's Nitrous Outlet

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From: Waco, TX

Plugs are to hot..

Those plugs are nasty but take some brake clean and see if you can wash the black off the smooth base of the plug.

Also did you upgrade the pistons in those fuel solenoids to work with E85?

Dave

Jul 17, 2013 | 06:44 PM

#12

89L98T56

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From: Albuquerque

Quote:

Originally Posted by Dynospeed

Are you getting any oil in the combustion chamber? I don't have e85 experience so I can't comment on that. But I do feel you need -9 also.

Not much if any. This motor does have some blow-by but it has since the initial fire. No smoke out the exhaust so I chalked it up to the .034" end gaps.

Quote:

Originally Posted by brandon@nitrousoutlet

Once you swap plugs be sure to read them because you may be able to put some timing back in it. I figured you had so much timing out to combat the heat from the plug?

I pulled all the timing the MSD 6010 would let me (15*) just to be safe for the first hit on the 250. I didn't even think about plug choice. I have made over 950rwhp with boost and E85 on BR7's with no issues before. I didn't do my research this time around, I fucked up, that's why I am here lol.

Quote:

Originally Posted by Killer5.3

Thanks for the info man.

Quote:

Originally Posted by Carter01

Personally i would run 7s on motor in that car and 10s on 250. Everyone has there own twist to tuning but your plugs are extremely hot for that combo.

7s ran great on motor. No problems even with a 100 hit. Didnt even snap about changing plugs for a bigger hit.

Quote:

Originally Posted by Nitro Dave's Nitrous Outlet

What am I looking for on the base of the plug?

I had no idea the pistons needed an upgrade for E85, tell me more.

Jul 17, 2013 | 07:53 PM

#13

Justins00ss

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From: Eastern Ma/ PSL florida

I am guessing like most things E85 related those pistons in the noids can deteriorate over time when they come in contact with E85. Kinda like it does to older rubber fuel line. Just my .02

Jul 18, 2013 | 09:14 AM

#14

ATVracr

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From: GB

I would run #10 plug
Make shorter hits 400' then 1/8th .. so on.
Work your way up looking at plugs the whole time.

Jul 18, 2013 | 02:01 PM

#15

dcam503

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From: pdx

holy crap, that thing is a beast!

Jul 18, 2013 | 07:32 PM

#16

89L98T56

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From: Albuquerque

Quote:

Originally Posted by ATVracr

I would run #10 plug
Make shorter hits 400' then 1/8th .. so on.
Work your way up looking at plugs the whole time.

NGK doesnt make a non projected, tapered seat #10.

Jul 18, 2013 | 08:22 PM

#17

SRTKLLR

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Guys is his A/F correct given that he is using E85? Doesn't E85 have a stoich of 9 or something like that.

I am about to switch to E85 so I can up the shot from 250 and it's only $3 a gallon here compared to $9 for race gas.

Jul 19, 2013 | 05:09 AM

#18

89L98T56

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Launching!

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From: Albuquerque

Quote:

Originally Posted by SRTKLLR

Guys is his A/F correct given that he is using E85? Doesn't E85 have a stoich of 9 or something like that.

I am about to switch to E85 so I can up the shot from 250 and it's only $3 a gallon here compared to $9 for race gas.

Had it on the dyno and that is where it made the most power.

Jul 19, 2013 | 08:40 AM

#19

brandon@nitrousoutlet

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From: Waco, TX

Quote:

Originally Posted by SRTKLLR

Guys is his A/F correct given that he is using E85? Doesn't E85 have a stoich of 9 or something like that.

I am about to switch to E85 so I can up the shot from 250 and it's only $3 a gallon here compared to $9 for race gas.

His A/F looks to be right on.

Jul 19, 2013 | 09:22 AM

#20

ATVracr

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From: GB

Quote:

Originally Posted by 89L98T56

NGK doesnt make a non projected, tapered seat #10.

Thats dumb!
Well get some heads that use gasket seat then. LOL!!

#9 will work just have to keep timing low.

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Melted BR7EF's *VIDEO*

Melted BR7EF's *VIDEO*

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Melted BR7EF's VIDEO

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