Shakermaker05

Hey guys, the weather up north here looks like it may finally be taking a turn for the better so I'm trying to figure out what mods I will do this year to my L03.

Right now, I'm leaning towards beefing up the fuel system (fuel pump, fuel pressure regulator, possibly injectors depending on $$$) I really want to get the EBL and start custom tuning, but I thought it would be a good idea to have a capable fuel system first.

My engine has some major mods (heads, cam, intake) check my V-garage or Car Domain page for a complete list. Considering my mods, do you think this is the appropriate step before getting into the EBL or should I just get the EBL and some 3.73's instead?????

Please advise of your thoughts and opinions, thank you!

akmusclecar

You will want to start tuning before you start doing any fuel related mods. The LO3 can benefit from tuning in its stock form. I am in the process of getting everything to start tuning, but i have been reading up a lot in the DIY Prom section.

Timothayyy

iTrader: (2)

You really need to get EBL and Fuel pump/pressure regulator. If your stock injectors are good, why bother replacing them? Just run some Techron through them if you think there a little dirty.

Definitely do fuel system and EBL before rear gears though. Gears dont really help your engine run any better.

Shakermaker05

Yeah, I was thinking that to really get the best tune out of the EBL I would first need the fuel to mix with all that air I'm pulling in right now.

As far as I know my stock injectors are fine! I just thought changing over to some good flow-matched injectors was the common thing to do when changing the fuel pump. If I can get by w/o changing them that's great news.

Could anyone point me in the right direction of what fuel pump/pressure regulater to use for the L03?

Timothayyy

iTrader: (2)

Im using stock injectors on my heads/cam/intake manifold 305TBI and havent had any issues.

I run Walbro 255 pump and Aeromotive 13301 fuel pressure regulator, and I really love my set up.

Shakermaker05

OK, I looked both of these parts up at Summit Racing and they both look like quality parts. They are a little pricier than I was budgeting for though.

If I only have the money to install one of these this summer which should it be?? Chances are I'll do both, but just in case (w/this crazy economy you never know...) what would be the better part to do 1st???

Timothayyy

iTrader: (2)

If you just do the fuel pump, itll cause you to run very rich. They sell adjustable springs for the stock regulator, that are alot cheaper then the Aeromotive. Do a search and youll find what you need to know.

Shakermaker05

I found a good thread on doing this! I glanced through it and it looks really detailed. When I have some more time I'm gonna read through it, but it looks like a cheap alternative to the $130 Aeromotive regulater.

One more quick ?, what fuel pressure are you and will I most likely be using once I get things situated??

Timothayyy

iTrader: (2)

Probably around 14 or 15. Without someway of reading the O2 sensor on your car, or a wideband O2 sensor, theres no real way to know how much youll need. Youre going to have to go based on how your car runs and by reading your spark plugs.

Shakermaker05

OK, I think I have all the information I need now to make an informed decision on what route to take with the fuel system. I will let you know what I do Timothayyy. I appreciate all the help you've given me!

Thanks & have a happy St. Patties Day!!

Timothayyy

iTrader: (2)

Youre welcome!
And happy saint patricks day!!

I H8 WWD

iTrader: (5)

Aeromotive all the way, they do nothing but break records. Read up on them, they are always breaking records with their parts.

http://www.aeromotiveinc.com/feature...ion=7&page=118

I plan to go Aeromotive as well, but not for a while.

graebz28

iTrader: (5)

Timmmmmmmmmay,

Did you need to increase the return lines with the 255? I heard about fuel pressure problems if the line was not big enough to handle all that extra fuel. Do you log your fuel pressure?

I may go with a VAPR if I see a need to. I am running a walbro 190 with an adjustable fpr from top down solutions. Why add another tuning variable (Fuel PSI) in if you don't need to. My car seems happy running at 850 rpms with a hotcam.

As mentioned above, get yourself prepped for tuning b4 messing with fuel pressure. I guess you could play with fuel pressure to tune in your current prom, but that is backwards how you would normally tune.

Timothayyy

iTrader: (2)

Im not using the stock lines, I just have I think 3/8in braided fuel lines going to and from the tank. So i cant comment on it being too much. A 190 is plenty for most cars though, I just went with the 255 so I never have to mess with it again.

I H8 WWD

iTrader: (5)

Also the 255 pump cycles only when fuel is demanded whereas the 190 pump cycles continuously when power is on

190- Continuous life is 5,000hrs or 209days
255- Continuous life is 18,000hrs or 750days

Both have replaceable filters

graebz28

iTrader: (5)

So a 255 has a pressure regulating switch to turn off or slow down the pump when pressure exceeds a setpoint? Sounds cool.

Last time I was researching people posted that walbro was sold and production moved overseas which resulted in quality going to crap. Anyone hear about this?

Timothayyy

iTrader: (2)

They had a bad batch of pumps. Havent heard anything bad aside from the one batch. Just order from Racetronix and youll be sure to get a non-flawed pump.
There arent many options besides Walbro except Bosch, all the other brands are just rebranded Walbros or they dont make a proper in tank pump for our cars.

Shakermaker05

I ended up buying one at Summit Racing last Wednesday and it has a "Made in America" sticker on it so hopefully that will assure I got a good one. I didn't know that this pump automatically regulated pressure, that sounds like a great feature. Sounds like $$ very well spent!!

25th92RS

iTrader: (4)

I believe GMPP makes a vacuum activated adjustable fuel pressure regulator. It allows the fuel pressure to change with decreased or elevated vacuum levels which will also equalize your air to fuel ratio at idle all the way through WOT. Apparently the LO3 is very rich at Idle and very lean at WOT. Just heard about this today actually.

I H8 WWD

iTrader: (5)

Realize though, in other countries including mexico they DO NOT have copyright laws, thus allowing them to stamp or sticker mexico made parts or taiwan parts or china with Made in USA on it.

Search for Ebay Guitar Scam. A bunch of Chineses guys made fender strat and gibson guitars with the made in usa wood stamp (stamped into the wood of the guitar). Just saying but Im sure walbro is a full usa made part.