MITS4

Does Bosch make a specific 5 bar or are they a reworked 4 bar?

Thanks
Chris

dingster

You can get it at:

AWE
MachV
Neuspeed
Greedspeed

SKS

I had a Bosch that had 5 bar stamped right on it...I had it about 3 years ago...MTM

dingster

purhaps they stamped it on? All the tuners I talked to said Borsch doesn't make a 5bar.

Electron Man

...from a 4bar FPR.

Dimple depth on the 4bar is ~6mm. The dimple needs to be 1.5mm deeper (7.5mm total depth from top face) for the regulator to deliver 5bar. Use a punch with a round end to deepen the dimple...or use a press for accuracy.

JWG

1 BAR = almost 15 psi. Too big of a jump in one go. I have an adjustable FPR, and it works wonderfully. I dialed it in after trial and error and have a very good mixture. When it loses some of its pressure retention ability , I will dial it up again. You cannot compensate for age on a non-adjustable FPR.

SKS

I will see if I can find it.

m_i

That's interesting, hmmm, I'd really like to know the product number and other markings on the regulator. I thought that most, if not all, of the Bosch 5 bar regulators used by the tuners would be modified 4 bar ones. Please post the info, if you can.

br Mika

m_i

What does 5 bar fpr mean actually? Does it mean 5 bar fuel pressure in the rail when the intake pressure is 0 bar (e.g. at idle with no vacuum tube from the intake manifold attached), and what about at full boost? What is the maximum fuel pressure? Has anyone mesured fuel pressures with 5 bar (modified or not) under different conditions, how much is it?

vaporhat

<ul><li><a href="http://www.bestservis.com/fse/fseng.htm">http://www.bestservis.com/fse/fseng.htm</a</li></ul>