FSE Power Boost Valves

Anyone know anything about these? Claim's to give a 12hp increase.

http://cgi.ebay.co.uk/FSE-POWER-BOOS...QQcmdZViewItem

I cannot work out how they would work if the car is running correctly. Maybe on a heavily modified engine but someone else may have a more informed opinion

they work by increasing pressure to the injectors. The valve diverts fuel back to the tank at a higher threshold so more pressure is developed in the rail, hence bigger injector spray and for longer.

Will increase fuel consumption somewhat, but do work, just like the TDI tuning boxes that fool the fuel rail pressure sensor into thinking the fuel pressure is low, so the ecu ups the pressure and increases the fuelling.

Could theoretically cause injector leakage and lumpy running / surging at idle if the injector springs are weak but most are probably up to a moderate increase in pressure.

Thats pretty much what they do, and the revs will rise and drop at idle. I had one on an old car and it did make a difference, wouldn't put it at 12bhp though. My fuel consumption didn't change much that I noticed either.

don't believe the hype! you only need one of these things if your running a modified engine. put the money toward a re-map

A normally aspirated engine is usually limited by the amount of air it can "Suck" in. by adding more fuel on its own you will not increase performance, you will just make it run rich.

Originally Posted by symonh2000

A normally aspirated engine is usually limited by the amount of air it can "Suck" in. by adding more fuel on its own you will not increase performance, you will just make it run rich.

Agreed. Migh twork for a diesel though which run much wider range of AFR.

I fitted one of these to my 164 24v 'Leaf when i had her and would say not a noticable difference in power but it did smooth the throttle response through out the rev range. I even replaced the old unit for a day to feel the difference and there was, so they work to an extent!

I know all the arguements but higher fuel pressure in the line will put stress on things but its not huge and only boosts fueling on open throttle via the vacum. The more pressure the less chance of fuel starvation of any form, therein smoother fueling. It returns to standard fueling level on idle and part/steady throttle.

People say there is a risk of running rich, lumpy or cylinder bore wash but i never notice any problems and any tuning will have an adverse effect to some components!

I was quite happy with my FSE and would put one on again.

bump,

Only just seen these while trawling ebay, will this sort out the sluggish early revs on my gtv up to 3000 - 4000. And will it give many significant gains?

Do you really think a cheap higher threshold regulator is a choice modification!? HAHA! Oh dear.

Complete and utter rubbish. Something clueless people used to tack onto xr3is and the like back in the day.

Think about it, you're messing about with the pressure within the rail by the crudest of means. Absolute junk. Plus if you were tuning your N/A engine properly, you'd want to be running leaner! Not richer! Haha.

Just leave garbage like this alone and ivest in some real modifications, not mickey mouse efforts.

Useful if you need to run higher fuel pressure but NEED to be set up on a rolling road otherwise you run the risk of the engine operating lean / rich.

I'd buy 10.... 120BHP increase!!!

Originally Posted by Sam O'Keefe

Do you really think a cheap higher threshold regulator is a choice modification!? HAHA! Oh dear.

Complete and utter rubbish. Something clueless people used to tack onto xr3is and the like back in the day.

Think about it, you're messing about with the pressure within the rail by the crudest of means. Absolute junk. Plus if you were tuning your N/A engine properly, you'd want to be running leaner! Not richer! Haha.

Just leave garbage like this alone and ivest in some real modifications, not mickey mouse efforts.

Originally Posted by Sam O'Keefe

Do you really think a cheap higher threshold regulator is a choice modification!? HAHA! Oh dear.

Complete and utter rubbish. Something clueless people used to tack onto xr3is and the like back in the day.

Think about it, you're messing about with the pressure within the rail by the crudest of means. Absolute junk. Plus if you were tuning your N/A engine properly, you'd want to be running leaner! Not richer! Haha.

Just leave garbage like this alone and ivest in some real modifications, not mickey mouse efforts.

Wow this is an old thread

Was'nt thinking about fitting one as i knew nothing about them, just put a post up to see if anyone on here knew anything.

i was toying with idea of putting throttle bodies, cams etc onto a C16XE. i needed a new regulator for that (adjustable i think) but that was a hell of a lot of engine work. i don't think a holed coconut air filter and a Heinze exhaust counts as tuning, so pointless.

I've heard stories of blown fuel lines from these too.