Where's my n20 mph?

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Oct 21, 2007 | 11:28 PM

#21

jmill96Z

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From: Movin' On Up

Does it feel like it pulls good through the whole run, or can you feel it lay down at the big end. Last day of the year for us up here I ran a 10.45@120. The car just nosed down at about the 1000' mark.

I think it could be in your tune. Any chance you have the capability to datalog?

Oct 22, 2007 | 12:43 AM

#22

crazboy99

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From: Powder Springs, GA

im not an expert on this by any means...but could it be your heads not being abole to flow enough...thats what cause one of my buddies not to break the 9s according to him

Oct 22, 2007 | 05:31 PM

#23

shortdog

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From: St. Louis, MO

It used to fall on it's face, but since i've changed the lines, added/cleaned the filters it now "feels" like it pulls on the whole run, but the mph is just not there. I've swapped heads, cams, converters, but no improvement on the bottle mph wise whatsoever.

It could be the tune, but still unsure due to the circumstances. See post #9. I guess it's time to invest in a wideband.

I don't think the heads are the issue. There are a few, and maybe more members pulling good mph with the same heads: https://ls1tech.com/forums/showthrea...rc#post6940623

Feb 24, 2008 | 05:28 PM

#24

koolrayz

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From: mansfield ohio

this does sound like a tuning issue. I wont spray my car without my wideband. I also suggest learning how to tune yourself. I think a trip to the dyno is in order

Feb 25, 2008 | 09:23 AM

#25

BQTransAm

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From: St. Charles, MO

Shorty,

Get that pressure up a little higher.... This is an old thread. Anything ever become of this?

Feb 25, 2008 | 05:32 PM

#26

shortdog

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From: St. Louis, MO

Not yet Chris. I'm working on the problem as we speak. A retune, refreshed tranny/converter and my own wideband is in the works. I'll post again in this thread with hopefully good results when the track opens.