How long should one of those last? Mine failed after 10 months and just after I dyno tuned my car damn it! I have put the factory one back on (luckily I kept it) and it works ok. Not happy at all... to the Bosch 3 bar I think!

 

That's exactly why I run the factory 2.5 bar fuel pressure regulator.. and have tuned my car around it.

I've seen quite a few of the adjustable fuel pressure regulators fail now...

TonyG

 

Whats your opinion on the bosch 3 bar? Anyone had that fail? This thing is a piece of junk. 10 months! And I wasted and poored fuel everywhere testing the pump and fuel pressure, I stink.

 

>>>Whats your opinion on the bosch 3 bar?<<<

Same as stock... but .5 more bar. Same build quality, same reliability.

You would be best off using the stock 2.5 bar regulator and the proper sized fuel injectors with a high volumn fuel pump by far...

TonyG

 

Yeah, my pump peaked out as well as my injectors... I think it flowed 3.25 litres per minute we tested it today. Are stock FPR's rising rate? In fact all FPR's such as the bosch 3.0?

 

The stock 2.5-bar and Bosch 3.0-bar are rising-pressure with a constante rate of 1:1. That is, fuel-pressure increases 1psi for each 1psi fo boost. This maintains a constant pressure-differential across the inlet and outlet of the injectors. Makes fuel-injections calculations easier.

FWIW, my Huntley adjustable FPR lasted only about 6-months.

 

Who makes the huntley unit? Is it Kirban? Does it have an orange seal between the two halves? Danno, don't you sleep?

 

When they fail, what happens... leaks?
I just installed one and now you have me wondering if I should have just popped in a 3 bar.

 

I'm wondering now too? What happens when one fails?

 

Many times they will spew fuel from the vacuum line port, but obviously they will give you inaccurate or no pressure at all.

 

I have a HR FPR for 6 + years without a failure.

 

They should all be kirban units. I would suggest getting in touch with them directly and having it swapped. I had the same problem happen with mine which I bought through Lindsey.
We cannot blame the people that resell them, but contact kirban and they should fix it for free like they did in my case.

 

What percentage of engine fires are a result of FPR failures? Anyone got any idea?

 

"When they fail, what happens... leaks?"

On mine, the pressure-rise was no longer keeping in sync. with the increase in boost. At 15psi boost, fuel-pressure only increased by 10psi. I was mapping some chips for a TO4E turbo and as we turned up the boost 2psi at a time, the extra amounts of fuel I had to program into the high-boost zones were increasing at a non-standard amount. So I hooked up a boost-gauge in the engine-compartment and put it next to the fuel-rail pressure gauge to watch on the dyno and AHAH! Swapped in a 3-bar FPR and went back to one of my standard chip-calibrations and started over.

Someone here also hooked up an electronic fuel-pressure gauge in their center-console panel to do this from inside the car as well.

 

The fuel went to zero on boost!!! The pressure going into the manifold prevented fuel to go in given the fuel pressure did not rise with it. What is the bosch part number for the 3 bar that fits are rail?