a few questions
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2003 C32 AMG, 2003 E39 M5
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2003 C32 AMG, 2003 E39 M5
Why would I re gap plugs that are on a stock car? 
This is just one post from Brandon suggesting plugs be re gapped when changing out to any pulley that increases boost. Did you read all the posts on the subject?
because I am pretty sure it was mentioned more than once. Maybe things changed since then I do not know. I did some homework before I throw out that comment on the plugs. If this has changed or you have other info that suggests you should not re gap I would be interested in seeing it 
.
If I am incorrect on this I apologize for any false info.
That first graph was actually the best looking run before we regapped the plugs down to 035. Some of the other runs we did before that, demonstrated just how important regapping the plugs is. So whether you are running a crank pulley, or the new sc pulley, regapping plugs is recommended. I was planning on doing a separate post with before and after dynos in regards to regapping the plugs. To be honest, I regapped in stages. First from 039 to 037, then from 037 to 035. After 035, everything always looked good. That first graph was an 037 run. The last was an 035 run. Every dyno at the stock gap, running the sc pulley, looked far worse. Power drop off was awful. Regapping the plugs will completely reshape the upper part of the power curve.
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Brandon Smith
Owner, Code3 Performance
www.code3performance.com
brandon@code3performance.com
This is just one post from Brandon suggesting plugs be re gapped when changing out to any pulley that increases boost. Did you read all the posts on the subject?
because I am pretty sure it was mentioned more than once. Maybe things changed since then I do not know. I did some homework before I throw out that comment on the plugs. If this has changed or you have other info that suggests you should not re gap I would be interested in seeing it .If I am incorrect on this I apologize for any false info.
That first graph was actually the best looking run before we regapped the plugs down to 035. Some of the other runs we did before that, demonstrated just how important regapping the plugs is. So whether you are running a crank pulley, or the new sc pulley, regapping plugs is recommended. I was planning on doing a separate post with before and after dynos in regards to regapping the plugs. To be honest, I regapped in stages. First from 039 to 037, then from 037 to 035. After 035, everything always looked good. That first graph was an 037 run. The last was an 035 run. Every dyno at the stock gap, running the sc pulley, looked far worse. Power drop off was awful. Regapping the plugs will completely reshape the upper part of the power curve.
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Brandon Smith
Owner, Code3 Performance
www.code3performance.com
brandon@code3performance.com
Last edited by bud4ya; Jul 11, 2008 at 07:23 PM.
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2003 C32 AMG, 2003 E39 M5
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I have a pulley on mine, track it hard, and left the STOCK gap alone. NO spark rattle at all. The theory is that when you increase boost, you make the gap smaller, as it is harder for the ignition system to ignite a denser charge. Whenever I change my plugs, I will regap them about .005' tighter.
See yeah
See yeah
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From: New Hampshire
2003 C32 AMG, 2003 E39 M5
TY I thought that was the case I was surprised by the response when I suggested the gapping of the plugs on a pullied car. I was like I know I read that somewhere. Sounds like doing this with your crank or S/C pulley set up will help out with power too.
Thanks
Thanks
I have a pulley on mine, track it hard, and left the STOCK gap alone. NO spark rattle at all. The theory is that when you increase boost, you make the gap smaller, as it is harder for the ignition system to ignite a denser charge. Whenever I change my plugs, I will regap them about .005' tighter.
See yeah
See yeah
