Doward

Still need to put the Walbro 255 fuel pump in, and am stepping up to 36# injectors... that's an increase of ~64%, correct?

69charger383

Holy big injectors batman! Why you going so big, does your turbo really lean it out that much?

Doward

@ 7psi, no.

@ 15psi... probably

*EDIT*

I want to mention, too - with 22pph injectors, @ 7psi, I'm flowing enough fuel to overload the STOCK fuel pump - going up to a TPI or Vette pump would offset that nicely - but a Walbro 255 will REALLY make sure I don't have any problems

69charger383

Well I hope al goes well w/ your installation. Got a question tho.. If I had 2 of those TEO4H turbos could I do a twin setup?? You said the one was too small but if its 1 on each half of the enine would it work ok?

Doward

Actually, yea, that would work well!

v6#21

I can give factual info from my personal experience on fuel presurre and injector size (Nothing really to do with this thread, but just useful info)

When I run my stock 15# injectors at the stock 38idle/43psi full throttle pressure, I run out of steam at about 4800 rpms and notice the power drops off.it will still pull up to 5500, but the poower does lack.

Now when I bump it up to the max I can get which is 45psi idle/ 58psi full throttle, it will pull right up to 5500k without power drop.

Up to about 4000 rpms, there seems to be no difference in the motors power output regardless of fuel pressure. But above 4000k it is noticibly better gains with the higher pressure. Keep in mind I am running a 62mm TB (stock is 52mm) and I am running PF&E headers and y-pipe, plus I have a smaller powerpulley on the crank shaft and 1.52 rollertip rockers and several other little goodies. Most importantly (i have to keep repeating this for those who don't know of just don't see the significance) that I have an extremely built drivetrain with very lightweight rotation mass (lighter convertor, brake assembilies, drilled axle flanges, carbon fiber driveshaft, etc..that helpthis motor spin higher quicker without robbing as much power. In clonclusion the added fuel pressure makes a big noticiable difference in rpms and power on my application.

69charger383

Whered you get that throttle body. Im making an intake but havent drilled holes to mount the TB to yet cause Im trying to find a bigger one.

v6#21

I seem to have the only one in existance. There was a guy selling them for several years (Franz of FDPerfprmance) and he was getting them machined from a guy in Switzerland of all places. I seem to be the only person to have ever biought one for a RWD F-body application. He had them made and was selling them also for the FWD 60*V6 motors also.

It is a Billet aluminum 62mm TB made specifically for our 3rd gen RWD MPFI 60*V6 motors. You can also see my PF&E stainless steel ceramicoated headers- they are the only stainless steel ones made. All others made were mild steel and painted except for the prototype y-pipe I believe that Redraif bought.

69charger383

Wanna sell it to me?? lol How much did it cost you? Does he still sell/manufacture them?

v6#21

No longer in business. He quit selling them a few years ago. I paid something like $225 for it.

Asfor selling it, money talks- make me an offer I can refuse.

TransAmMike

I read in a tech article off TGO's main page that kicking the fuel pressure up to 50 PSI works really well with boosting HP n Torque.

If this is true and I get an adjustable fuel pressure regulator, how do I tune it to 50 PSI?

Is this really effective?

v6#21

Install a fuel pressure gauge. This is great for troubleshooting roadside problems in the future. you can tell in a glance if you are having fuel delivery troubles. The bottom pic shows where I tapped the sender unit into the fuel block on the fuel rail assembly

69charger383

Who make a fuel pressure regulator for the 2.8 V6?? Whats the highest pressure for the V6 also.

Naft

holley makes an afpr i believe.

dean posted the highest pressure in this thread, just scroll up a bit.

v6#21

Holley TPI units fit fine. It what I am using. They have a large knurled spinning adjuster on the top that can be easily adjusted in seconds using a screwdriver tip against the knurled edges.

58psi at full throttle is the max I can get.

69charger383

Whats that arrow pointing to exactly??

TransAmMike

Would boosting the pressure screw anything up or be pointless if I have a mostly stock engine? I figure I at least gotta get bigger injectors?

V6#22

http://store.summitracing.com/largei...rt=HLY-512-501
Its pointing at the adjustable Holley fuel pressure regulator.

rx7speed

since I'm like stupid and stuff can someone convert lbs/hr into cc/min of flow for the injectors?
nevermind I think I found one...

lol you guys use small injectors... even you doward