Went to the dyno--really lean, help

Kens86gt · 04-06-2005, 02:59 AM

Well I have an adjustable fuel pressure regulator coming, too, so I have the reg part fixed, too. I bought it before I saw the article by MW. There was a pressur spike under WOT (to 44psi), but it wasn't monitored when it went lean.

Dark_5.0 · 04-06-2005, 01:03 PM

Here is your problem.

Your car is speed density so it does not correct for fuel like mass air does.

You "need" an adjustable regulator to add fuel to the mixture cause speed density will not add fuel to compensate for more air flow.

Lucky for you this is a simple fix. Increase the fuel pressure and you are good to go.

Wesleys article is specific to mass air cars.

I ran speed density for a few years with way more mods than you with geat results.

I was running 44 psi of fuel pressure with a good H/C/I package.

04-06-2005, 02:59 AM	#1
Kens86gt Clueless Join Date: Apr 2005 Location: Niles, Ohio Posts: 8	Re: Went to the dyno--really lean, help Well I have an adjustable fuel pressure regulator coming, too, so I have the reg part fixed, too. I bought it before I saw the article by MW. There was a pressur spike under WOT (to 44psi), but it wasn't monitored when it went lean.

04-06-2005, 01:03 PM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: Went to the dyno--really lean, help Here is your problem. Your car is speed density so it does not correct for fuel like mass air does. You "need" an adjustable regulator to add fuel to the mixture cause speed density will not add fuel to compensate for more air flow. Lucky for you this is a simple fix. Increase the fuel pressure and you are good to go. Wesleys article is specific to mass air cars. I ran speed density for a few years with way more mods than you with geat results. I was running 44 psi of fuel pressure with a good H/C/I package. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

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