5.3/Magnacharger @10lbs-Fuel System

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11-12-2009, 05:16 AM
SUPERBURBAN

5.3/Magnacharger @10lbs-Fuel System

I'm finally addressing my fuel upgrades and would love some suggestions. I've been told #42 Injectors and both a Walbro or a BoostaPump. The motor is running LEEEAAAN, very lean. The tuner just improvised for the fuel starvation, and at the time I did not know any better. I wanted to confirm that I indeed need the Walbro, knowing damn well I need the injectors. Also, will the 42's be enough or do I go higher? Are there any setbacks to going with a larger than necessary injector? Any help is greatly appreciated, I'm tired of wasting money. After installation by either G Force here in Houston or Nelson if I have time to make it to San Antonio I'd do a dyno tune.

Thanks
11-12-2009, 06:19 AM
foggy

Get walbro pump and 60# injectors. you'll be close to maxed out with the 42#.
11-13-2009, 07:11 AM
Sleaper

Quote:

Originally Posted by SUPERBURBAN

I'm finally addressing my fuel upgrades and would love some suggestions. I've been told #42 Injectors and both a Walbro or a BoostaPump. The motor is running LEEEAAAN, very lean. The tuner just improvised for the fuel starvation, and at the time I did not know any better. I wanted to confirm that I indeed need the Walbro, knowing damn well I need the injectors. Also, will the 42's be enough or do I go higher? Are there any setbacks to going with a larger than necessary injector? Any help is greatly appreciated, I'm tired of wasting money. After installation by either G Force here in Houston or Nelson if I have time to make it to San Antonio I'd do a dyno tune.

Thanks

Are you still running stock injectors with the charger? If so, I wouldn't drive it until I got the fuel upgrades. Like Foggy said, get the 60's and a Walbro and you should be good.
11-13-2009, 07:41 AM
r.barn

Make sure you get the High Pressure 255 Walbro.

and +1 on 60's, give you a little wiggle room later if you
ever wanted to bump the boost up some.
11-18-2009, 04:06 AM
SUPERBURBAN

Good to know, thanks

Quote:

Originally Posted by foggy

Get walbro pump and 60# injectors. you'll be close to maxed out with the 42#.
11-18-2009, 04:08 AM
SUPERBURBAN

I have been driving it, yes. I even made a few passes at the track. Have a caused any valvetrain or piston damage?

Quote:

Originally Posted by Sleaper

Are you still running stock injectors with the charger? If so, I wouldn't drive it until I got the fuel upgrades. Like Foggy said, get the 60's and a Walbro and you should be good.
11-18-2009, 06:33 AM
Sleaper

Quote:

Originally Posted by SUPERBURBAN

I have been driving it, yes. I even made a few passes at the track. Have a caused any valvetrain or piston damage?

It's possible. I'm assuming that you have a wideband to tell you that it was running lean. Driving it is not a big deal as long as you stay out of boost, but I definitely would not be making any track runs until I got the fuel system upgraded. It won't take much to fry a piston if you are running lean. If you start noticing excessive blow by, then the damage is already done.
11-18-2009, 02:41 PM
EmmerichLSx

You'd be fine with 42's if say your on a budget and got them for cheap. But as far as wiggle room for more power later, yes you'd want the 60's.
11-20-2009, 06:13 PM
SUPERBURBAN

How do I recognize "blow by"?

Quote:

Originally Posted by Sleaper

It's possible. I'm assuming that you have a wideband to tell you that it was running lean. Driving it is not a big deal as long as you stay out of boost, but I definitely would not be making any track runs until I got the fuel system upgraded. It won't take much to fry a piston if you are running lean. If you start noticing excessive blow by, then the damage is already done.
11-20-2009, 08:39 PM
jetmech

I'd do a compression test just to be sure :twocents: