Okay, I'm one of the guys that tries to write a good tech tip when I think it will help someone out. I do the "homework" and make things easier for the next guy that does this project. Yes, you should get at least a second endorsement on any project. I just finished a tech tip on installing a Mez electric water pump. It's a lot of work to write something like that up. But if it makes someone elses job better and easier, then it is worth it to me.

Yes, we need to "police" the tips and that is what I thought was done before they post it. How about putting a poll on each article and have people vote yah or nah on an article. That way, too many nahs and it shouldn't be followed or maybe removed.

I have gained so much info from this forum and I feel I should pass it on. Enough said, and thanks to the guys that take the time to answer questions.

:flag :flag :flag :thumbs:

 

Strick,

Please again understand that I was not trying to tear someones advice apart. Nor should someone be afraid to post tech tip. I came across that tip and :eek: when I read it.

Having a good understanding of the fuel management system...the regulator plays a key roll in the effectivness of the injectors. There is no benefit from romoving it from the loop.

As I said I would be happy to help the author of the article draft up a more technical paper with regards to the working of the regulator if he would like to.

Everyone should be encouraged to post tips to help one another. A simple solution before posting one, would be to run it past the audience first in a simple post stating....[Tech Tip Review].....I was thinking it would be helpful to post a tech tip on ___________. Then give the tip in summary or in full disclosure.

That way you can hash out any unclear areas or clear up any rebuttels that might be present.

Just a thought.... :cheers:

 

Okay, Ski, I'll try it out. Look for the Mez pump install.

 

how is this tip diferent from using a adj. FPR to raise the pressure

 

The AFPR is still vacuum referenced. This tip had you eliminate the vacuum reference.

BTW: An AFPR can still make fuel mileage read wrong unless you set it to the stock setting, which would defeat the purpose of installing it in th4e first place.

Basically, if you want to change something...do it but dont brag about mileage readouts, because 90% of the time after mods...it's incorrect.

 

thanks, i actually hooked mine back up after reading this.

 

The difference is your taking the vac reference needed to keep a constant pressure on the injectors away when you remove the vac line from the regulator. In other words, when you drive around and go from idle to part throttle to WOT the fuel line pressure stays the same throughout. This is not a good thing, for the reasons I posted above.

This may help some understand. Here is a video of my car on the dyno with a vac gage connected to the plenum. You will see there is a vac at part throttle, meaning that manifold pressure is VERY LOW (a vac, that wants to draw the fuel from the injectors as soon as it opens), then at WOT the vac goes to zero. Pressure becomes the same as atmospheric, now the regulator needs to increase the pressure, to maintain the same pressure difference across the injectors The key here is understanding that the pressure differential needs to remain the same on the injectors.
http://temp.corvetteforum.net/c4/ski...ac_guage-1.wmv

Watch the video this is what is happening to your manifold pressure as you increase or decrease the throttle, likewise when you regulator is working properly, it too is increase and decreasing to maintain that pressure to keep the pressure difference the same. Here is in the nutshell:

High Vac is low pressure.
At Zero Vac = Atomoshperic pressure (greater than high vac)

At High vac(Idle)=Fuel pressure needs to be lower
At Low Vac(WOT)=Fuel pressure needs to be higher

Hope that kinds explains the nuts and bolts of it for you. :cheers:

When you finally understand it, it will be like a big lightbulb going off in your head :lol: :yesnod: :smash:

 

I have the same understanding of the system and I have to say........Right on, there is a huge difference between atmospheric/vacuum with the system and the regulator is there to ensure that power is distributed properly along the curve

:withstupid:

Removing the vacuum reference is a bad move, anyone that argues that should be muted......I back ski on this 100%

Kitt

 

Yep, clear as mud.

Don't matter though. 10 seconds from now it's right back where it was. It will all be academic when I get AFPR installed without the vacuum line hooked up. JUST KIDDING!!

BIG JIM

 

:iagree: :boxing

 

Maybe we can discuss the MAT relocation mod next???

That one looked bogus to me too!

Just because they are up there it doesnt mean you should do it. I have seen that one a bunch of times, and knew it was not a good thing to do, its just good that Jesse has the EFI knowlege to back it up, which I dont. But use your head guys!

Its never a good idea to mess with the vacuum systems on any car. One tiny vacuum line pinched or disconnected can render a car undriveable, and a PCV valve is almost as bad.

Good work Jesse.

BTW, Im a little rich, its a little sweet smelling in the cab, and I get some smoke. Less FP? Heated o2?