What spark plug are you running with your 450+hp evo
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From: Detroit/ Philly/ Tokyo
As B.J. mentions above, we need to know if you gapped the plugs and if so what the gap is set at? I would stay away from Autolite plugs on my Evo. If you want to stay with a copper plug , then either try the NGK BPR7Es as B.J. suggests, or else I might prefer the BR7ES(note: not BPR7ES).
The BPR7ES is one full heatrange hotter than the the BPR8ES. Whereas the BR7ES is right between the two. It is only a step hotter(half a heatrange) than the BPR8ES, which makes it a step colder(half a heatrange) than the BPR7ES.
If you do mostly sustained high speed highway driving then the BPR8ES should run fine. If however, you do any stop and go city driving, or the engine idles for more than brief periods of time(at traffic lights), then the BPR8ES may have a tendency to foul, or load up.
COLDER BR8ES>BPR8ES>BR7ES>BPR7ES HOTTER
The BPR7ES is one full heatrange hotter than the the BPR8ES. Whereas the BR7ES is right between the two. It is only a step hotter(half a heatrange) than the BPR8ES, which makes it a step colder(half a heatrange) than the BPR7ES.
If you do mostly sustained high speed highway driving then the BPR8ES should run fine. If however, you do any stop and go city driving, or the engine idles for more than brief periods of time(at traffic lights), then the BPR8ES may have a tendency to foul, or load up.
COLDER BR8ES>BPR8ES>BR7ES>BPR7ES HOTTER
i did notice that my BPR8ES are white when i took them out. Looking from the charts online it means over heating.
Running a wide .028" gap with any stop and go driving on a BPR8ES with high mileage coils and/or wires then the pugs are going to tend to foul and start to miss.
The gap is too wide for that cold of a plug unless maybe you had a COP setup. What RPM range and boost level is it missing at anyway? Is it at idle or at WOT?
The Autolites are junk as someone pointed out. They tend to run hotter than advertised and are no good on boosted applications as they tend to have preignition issues.
The gap is too wide for that cold of a plug unless maybe you had a COP setup. What RPM range and boost level is it missing at anyway? Is it at idle or at WOT?
The Autolites are junk as someone pointed out. They tend to run hotter than advertised and are no good on boosted applications as they tend to have preignition issues.
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From: Detroit/ Philly/ Tokyo
Running a wide .028" gap with any stop and go driving on a BPR8ES with high mileage coils and/or wires then the pugs are going to tend to foul and start to miss.
The gap is too wide for that cold of a plug unless maybe you had a COP setup. What RPM range and boost level is it missing at anyway? Is it at idle or at WOT?
The Autolites are junk as someone pointed out. They tend to run hotter than advertised and are no good on boosted applications as they tend to have preignition issues.
The gap is too wide for that cold of a plug unless maybe you had a COP setup. What RPM range and boost level is it missing at anyway? Is it at idle or at WOT?
The Autolites are junk as someone pointed out. They tend to run hotter than advertised and are no good on boosted applications as they tend to have preignition issues.
idle has absolutely no problems. regular acceleration has no problems. its only at WOT sometimes that it misfires...
Do you have pics of the plugs that you pulled out of your engine? White may indicate a lean fuel condition. Although for plug color to be an accurate indicator of combustion the engine has to be shut off immediately after a high speed run and car has to be coasted to a stop.
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From: Detroit/ Philly/ Tokyo
Do you have pics of the plugs that you pulled out of your engine? White may indicate a lean fuel condition. Although for plug color to be an accurate indicator of combustion the engine has to be shut off immediately after a high speed run and car has to be coasted to a stop.
it was white like if you would put white powder onto the spark plugs
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From: Sag-Nasty, MI
0.022
how much boost on the black are you running? what fuel?
Last edited by Liqquid; Sep 13, 2011 at 02:28 PM.
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From: riverside, ca
ive ran bpr8es and mine fouled within 7-9k i know there cheap in price, im runnin a sparktech noncdi, and instead of goin with another set of copper plugs, I swapped them for some denso iw24, which are one step colder plugs, but they are also iridium instead of copper been runnin them for a few thousand and it runs good for the most part.
i run the same bpr8es gapped .022. change frequently if stop and go. i ran mine about 7k and the car refused to start on a cold morning (0 degrees farenheight), replaced and good to go so replace more frequenlty now they a cheap
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From: Sag-Nasty, MI
good info, I prefer the plug for cost and performance, the only time I seem to foul them out is switching fuels (pump to E85/back).. changing them at every oil change for 8 bucks wouldn't be a bad idea, plus it makes you look at the plugs and see what they're doing on a regular interval if you're not already...
I have indeed heard some people saying they're ok on platinum's but I'm not going to mess with it.. get something that works and stick to it.. I'm running high boost on E85 on the black on a m&w box/c.o.p... having to change these out is no big deal here and there, if I gamble with another plug at this point it might wind up real bad.. so I'll just stick to what's proven
I have indeed heard some people saying they're ok on platinum's but I'm not going to mess with it.. get something that works and stick to it.. I'm running high boost on E85 on the black on a m&w box/c.o.p... having to change these out is no big deal here and there, if I gamble with another plug at this point it might wind up real bad.. so I'll just stick to what's proven
I run BPR8EIX (Iridium) gapped at .020" on E85 with a DIY spoolinup COP... no issues to note, I run these as I get a great deal with military discount at O'Reillys and they are always in stock... if not I would run the BPR8ES (Copper Core) gapped at .020"...
I am running Buschur built 2L with FP Black right now on my evo with 100k miles
I started getting P300 code recently. I figured it was the spark plugs.
NGK BPR8ES is what i ran.
I then put in another set of NGK BPR8ES only this time it was made by autolite. Now the car is running better but still misfires here and there.....
First of all, is it due to the spark plug?
or is there something else i should check? coil pack maybe?
Stock coilpacks and wires
1000cc injectors
plug gap was set aroun .028 if i remember correctly
any comments would be appreciated
I started getting P300 code recently. I figured it was the spark plugs.
NGK BPR8ES is what i ran.
I then put in another set of NGK BPR8ES only this time it was made by autolite. Now the car is running better but still misfires here and there.....
First of all, is it due to the spark plug?
or is there something else i should check? coil pack maybe?
Stock coilpacks and wires
1000cc injectors
plug gap was set aroun .028 if i remember correctly
any comments would be appreciated
Stock heat range: NGK BPR7ES
1/2 step colder: NGK BR7ES
1 step colder: NGK BPR8ES
1 1/2 step colder: NGK BR8ES
At 450 HP I would go with the BPR8ES or BR8ES and change them every 3,000 - 4,000 miles or so. For boost above 25 psig, which I assume you are running with the Black, I would gap them at .024" and if you still getting missfire gap to .022".
Dan (drb)