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08-08-2005, 10:19 AM

RICEFEDZ28

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Join Date: May 2005

Location: Ocala, FL

Posts: 319

fmu

How important is it to have an fmu on an s trim with stock 24 injectors.

08-08-2005, 10:23 AM

Alvin@pcmforless.com

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Location: Charlotte, NC

Posts: 1,614

Re: fmu

How important is your bottom end?

08-08-2005, 10:32 AM

Bryan 94 Z28

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Join Date: Sep 1999

Location: Urbandale, Iowa

Posts: 208

Re: fmu

Quote:

Originally Posted by Alvin@pcmforless.com

How important is your bottom end?

LOL....Exactly.

You'd better have it on there or you'll run lean as hell and grenade that engine.

You're better off getting bigger injectors (42 lb at least) and tuning the PCM for them.

08-08-2005, 08:42 PM

DarinsTA

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Join Date: Jun 2001

Location: Drakesboro, Kentucky

Posts: 329

Re: fmu

I have a Super Fmu for sale if interested.

08-10-2005, 11:31 PM

radik

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Join Date: Nov 2001

Location: Victoria , BC , Canada

Posts: 78

Re: fmu

Go the injector route.. i'm running 42's at 50lb's no fmu.

08-11-2005, 12:11 AM

OBE1 95Z28

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Join Date: Dec 1969

Location: San Diego, CA

Posts: 4,950

Re: fmu

The stock injectors and computer program can't provide enough fuel to feed your SC, therefore you'll run lean and destroy your engine. A FMU boosts the fuel pressure to make your 24 lb/hr injectors feed more fuel (24 lb/hr at 43 psi). A better (more HP) and safer way is to bump up the size of your fuel injectors and have the computer custom tuned on a wideband O2 sensing dyno for a safe air/fuel ratio.