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Jul 3, 2008 | 04:07 PM

#21

mrr23

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From: orlando, fl

thanks for the input.

Jul 3, 2008 | 04:11 PM

#22

Nitro Dave's Nitrous Outlet

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From: Waco, TX

No problem. It looks like it was time for springs anyways. Atleast they were dual springs and you did not bust a piston.
Dave

Jul 3, 2008 | 06:00 PM

#23

ShiznityZ28

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From: GB MD

Quote:

Originally Posted by mrr23

on the dyno, at 21*, it had no knock. AFR 12.5ish so i don't see why i need to drop 6* of timing. but hey if that's what it'll take.
autolite 103 plugs = ngk bp7efs plugs have looked fine.

you guys run these times more than i do.

I don't know where guys got this idea they can tune by knock. take them off the car and throw them in a field tune from the spark plugs. i have melted pstons and showed no knock!

Jul 3, 2008 | 06:03 PM

#24

ShiznityZ28

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From: GB MD

Quote:

Originally Posted by mrr23

autolite 103 plugs = ngk bp7efs no signs of anything going on.

when i look at my PLX wideband on the street, it showed 11.9 on the bottle. dynojet showed 12.5ish. so, which one would be correct?

either way, i'm changing to autolite AR-94 plugs and i'll drop the timing some more.

put it around 12.2 and cut a plug down to read it. get your self a battery operated cut off grinder. on a 250 you need to be on a ngk 10(or equivelent) -9 degrees from base timming. a/f needs to be read at the track not on the dyno to get the correct load.

Jul 5, 2008 | 01:04 PM

#25

Loudmouth LS1

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From: Deerfield Beach, FL

Quote:

Originally Posted by ShiznityZ28

I don't know where guys got this idea they can tune by knock. take them off the car and throw them in a field tune from the spark plugs. i have melted pstons and showed no knock!

Yup, i've destroyed plugs and beat the **** out of the pistons with the debris and no knock to be found in my logs!

No longer have knock sensors, not necessary, threw them out, saves a little weight I guess, hahahah!