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A/F ratio question

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Old Oct 12, 2003 | 12:11 PM
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Baluchitherium4's Avatar
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Default A/F ratio question

I had my cay dyno'd recently and the A/F ratio was a little on the lean side I think.

It went like this:

13.0@2500 to 13.5@3800

13.5 from 3800 to 5200 then

13.6 from 5300 to 5700

back to 13.5 from 5800 to redline.

Now, I don't think my car is pinging at all. I do notice a rattle from inside the car, but I think it's something in the interior. Granted, I have never heard what pinging or detonation sounds like. I've read the about the ball bearing in a tin can sounds, but I really don't think I'm hearing anything like that.

My question is, should I ping with the above A/F or is it safe to run it like that?

I run 94 octane gas. The car is a 00' WS6 M6 with 37k on it. The mods are FRA, Lid, K&N, EGR hacked off, MAF descreened, TB bypass, and SLP Loudmouth cat-back.

Thanks in advance,

Dale

BTW, the car made 328.5RWHP and 335.5RWTQ without the cat-back.

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