My goal is to at least hit 500hp. I am hoping to push at least 25psi and maybe even more if the turbo(Borg Warner s200) can handle it. I want the upgrade to the gt42 in the future. What would you recommend my plugs to be?
Bpr7 or Bpr8 spark plugs
b00sted_spyder
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So I'm going with the 8's then
. 25+psi and won't be driven that often. Hopefully upgrade to the gt42.
. 25+psi and won't be driven that often. Hopefully upgrade to the gt42.
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I've pulled a few degress of timing already.
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I'm bringing this back to the top for discussion. There is so much debate in all these type of threads about what plug to use for high boost applications. Can we get a clear or somewhat clear answer of what NGK plug to use for lets say <30psi and >30psi?
I personally brought this up because I fowled my plugs after only 1k with BPR7es(running slightly rich at 10.2 a/f). I'm running 30psi on my 50trim and a average of 100octane(but will no longer run race fuel as I'm switching to meth) I plan to run 35+ this season and can't figure out if I should run BPR7es, or BPR8es.... So can I get a clear answer
Jordan
I personally brought this up because I fowled my plugs after only 1k with BPR7es(running slightly rich at 10.2 a/f). I'm running 30psi on my 50trim and a average of 100octane(but will no longer run race fuel as I'm switching to meth) I plan to run 35+ this season and can't figure out if I should run BPR7es, or BPR8es.... So can I get a clear answer
Jordan
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Stick with 7's.
I didn't switch to 8's until I made over 600whp.
I didn't switch to 8's until I made over 600whp.
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BR7es here, SC61@31psi, 11.1 leaning to 11.7 up top a/f ratio, 16 deg peak timing at 8k rpm, 93+meth. There is no definitive answer since every setup is different, only a close guideline. You will probably be fine with 7's. Your fuel and rich mixture is probably what's fouling the plugs.
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Jordan I use 8's. I had some small missfires when I ran the 7's. I also had some weird looking logs when I tried the br7es and 8s.
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What does it mean when spark plugs start fouling? Sorry Real noobie question.
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I think the more important question is "What gap should I use for 30+psi?" rather than "What plug?". You'll probably want to tighten your gap more than you think if your running over 30psi.
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Very valid point, but 'personally' I already knew this, I'm just more curious about the plug. I've closed my plugs from .028 to about .026 not to much but just a little something to help with the higher boost.
I guess I'll stick with these 7's until I start boosting 35+ on my new setup this season...
Then we will see what the 8's do.Jordan
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Ive only been apart of one car tuned for ~35psi and the only way he could get his slight stutter at high RPMs to go away was with a very small gap on 7's. I believe it was in the neighborhood of .020".
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