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Mar 21, 2004 | 05:57 PM

slyws6

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From: "Tr"Asheville

Check This Out!!!

Ok, I have the mods in my sig minus the ported TB and I haven't had the ported MAF on the car yet. I put them in my sig because well I have been meaning to get around to porting the TB and putting the other MAF on. Anyway, after going to the 1/8mile track again today I was stuck in the 7.70-7.72 at 89-90mph. This just seemed a little slow for my mods. So in despair I decided to take out the screen in the MAF sensor to see if it made any difference (not knowing what else to do at this time). First run down the track without the screen (only change) netted me 7.61 @ 91.5mph

so I thought to myself this must be a fluke. Once again, 7.61 at 91.8 mph!! So this tells me that my engine is breathing through a straw and needs more air, so I'm hoping a ported TB and putting my ported MAF on will make a big difference!

Results: 60ft- 1.765 ET- 7.615 MPH- 91.863

I just found this amazing that the screen made this much difference. I also know this time isn't the best and could be better, with a faster 60ft, turning of the COT sensor that the tuner forgot to turn off, and the ported TB and MAF I think my times will drop even more.

-Sly

Mar 21, 2004 | 06:03 PM

Brian2001SS

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You forgot to add that nitrous in your sig

Mar 21, 2004 | 06:07 PM

slyws6

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From: "Tr"Asheville

lol oh ya supposedly there were rumors going around at the track that I was running a 200 shot....some people just don't know what the LS1's can do

-Sly

Mar 21, 2004 | 06:42 PM

Lady Redhawk

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From: sojourning....looking for my city whose builder and maker is God.

Quote:

Originally Posted by slyws6

First run down the track without the screen (only change) netted me 7.61 @ 91.5mph
I just found this amazing that the screen made this much difference. -Sly

I would be willing to bet that you were running too rich (the cots may have something to do with it). Descreening your MAF will change the way the senor "reads" the air coming in. To make a long story short, the computer was adding tons of fuel in PE mode before you descreened your MAF. After you descreened it, the computer did not add any "extra" fuel at WOT (PE mode), giving you much better performance!

Mar 21, 2004 | 06:51 PM

slyws6

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From: "Tr"Asheville

That's actually kind of what I was thinking, the 'tuner' got the car running to where the O2's were reading 850-880 but didn't remove the COT sensor readings. Going down the track you could see a little black smoke coming out of the back. What gets me is she had to take fuel away from the factory fuel tables....does this make sense?

-Sly

Mar 21, 2004 | 07:07 PM

Lady Redhawk

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From: sojourning....looking for my city whose builder and maker is God.

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Originally Posted by slyws6

Yes, that makes sense. You need to get your part throttle Ltrims right first. If the computer has to add fuel during part throttle, then it will add during WOT that same amount. That is why she had to "take away" fuel from the PE tables, to make up for the extra the pcm was adding. What you have so far is a bandaid on your fueling. Need to get some good part throttle tuning done before you mess with PE tuning.

Mar 21, 2004 | 07:15 PM

slyws6

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From: "Tr"Asheville

makes sense. is it safe to drive the car that way?

-Sly

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Mar 21, 2004 | 07:41 PM

Lady Redhawk

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From: sojourning....looking for my city whose builder and maker is God.

Quote:

Originally Posted by slyws6

makes sense. is it safe to drive the car that way?

-Sly

No problem driving the car. I tuned a car a while back and got him over 50 rwhp with the tune. It wasn't that my tune was so good, he just wasn't getting the benefit from the mods he already had. He had 85mm MAF, Air Lid, 85mm Throttle body and headers with orp. His part throttle Ltrims where running +13, meaning the pcm was adding a lot of fuel at part throttle, therefore it added a lot at WOT. We got his Ltrim to a minus number, so the pcm wouldn’t add any more fuel at WOT. That and doing a few other things gained him a lot horse power, much of it he should have already had with his mods.

Mar 21, 2004 | 07:42 PM

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Lady Redhawk

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From: sojourning....looking for my city whose builder and maker is God.

Thanks Steven!! You are much too kind!!

Last edited by Lady Redhawk; Mar 21, 2004 at 08:01 PM.

Mar 21, 2004 | 08:01 PM

#11

slyws6

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From: "Tr"Asheville

-Do you do tuning there?? If so how much?? My ltrims at part throttle are roughly +13 last time I checked, actually I have seen them between +9 to +17

-Sly