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carbon buildup?

4287 Views 19 Replies 9 Participants Last post by  barnoun
i ran at the strip tonight and my friend said while i was making my pass i had black smoke coming out of my tailpipe when i would shift. he's pretty knowledgable about cars and said it was probably carbon buildup. is this the reason or could there be other alternatives? he also told me to put some 110 octane race fuel in and it would burn off the deposits. any help is appreciated.
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you should check for combustion chamber cleaning. this is VERY effective. i did it on my b13 about 2 months ago, totally different motor. anyway, if you do put 110 octane in your car, don't put more than 1/3 a tank, or else it might detonate, or could really damage your motor!
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