HP Loss From Speed Density Mode

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Jul 10, 2003 | 05:10 PM

jhelms

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From: Columbus, GA

HP Loss From Speed Density Mode

How much rwhp would a regular 400+rwhp H/C car lose if the MAF fuse blows and sends the car into speed density mode?

Jul 11, 2003 | 12:36 AM

NoGo

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From: Mass

Re: HP Loss From Speed Density Mode

On most modified cars (specifically the cam part of heads&cam), speed density mode DUMPS fuel. Your a/f tanks and the car is noticeably richer.

Dropping your a/f from 13.0 to ~10.0 would be at least 20 HP.

Good Luck,
Kevin

Jul 11, 2003 | 12:39 AM

2001CamaroGuy

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From: Phoenix, AZ USA

Re: HP Loss From Speed Density Mode

how does one tune speed density so they can get rid of the MAF?

Jul 11, 2003 | 12:44 AM

NicD

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From: Chandler, AZ

Re: HP Loss From Speed Density Mode

Quote:

how does one tune speed density so they can get rid of the MAF?

Many suggest that disconnecting the MAF would put it into speed density mode and start to use the VE tables. The car should still use the feedback of the O2s and it should use the LTFT values. I have verified that this is not true however as I have disconnected my MAF, edited the VE to 25% of stock, then 175% of stock and saw no difference in my maxed out negative LTFTs. I think something is still not found in the LS1 computer and put into LS1edit yet.