FSE Power Boost Valve

[dellyend1]

Hi All,

Any comments or observations would be gratefully received as thinking about purchasing one :

http://www.ebay.co.uk/itm/130473395465?ssPageName=...

Being a 'bear of little brain' the principle seems good to me, but has anyone tried it and does it effect the emissions test during the MOT

Thanks All

Jeremy

[Transmitter Man]

Yes - bin it.

http://www.pistonheads.com/gassing/topic.asp?t=857...

Phil
420 SEAC

[adam quantrill]

In the interest of balance:

http://www.pistonheads.com/gassing/topic.asp?t=117...

http://www.pistonheads.com/gassing/topic.asp?t=819...

and finally

http://www.pistonheads.com/gassing/topic.asp?t=133...

Make your own mind up.... ;^)

[Transmitter Man]

Adam,

You wrote in one of the threads above:

'It is good because it's relatively cheap - gives a good bang for the buck.'

Umm

Phil
420 SEAC

[adam quantrill]

It does - I think mine cost £35 and gave some mild improvement in horsepower at the top end. (It also has lasted a long time and for me has been reliable.)

The premise is that this is on a standard flapper 350i with a standard 4CU (as fitted to the SDi Vitesse).

The reason that it works on that combination is that the fuelling is mapped for economy rather than for power.

It won't necessarily apply to other engines, different injectors or modified ECU's.

[maston]

Got an fse on my 390 too , nice improvemet especially the throttle response :-)
Had it on the rollers a few months ago , 227 bhp and 254 ft/lb torque.
Happy with that and drives lovely

[Jhonno]

Kill it. Kill it with fire.

If you "need" one, there are other issues.

Seen engine fires with these fitted.

[adam quantrill]

If your hoses can't take full pump pressure unregulated without splitting, then there are other issues.

Could happen with a standard regulator too, or do you think these always fail safe?

It is worth saying though - because the FSE can run at a higher pressure as part of its normal operation - it will put the fuel hoses up to the return pipe under more strain during normal driving, all other things being equal. So please check your hoses after installing a new regulator, in particular get the pump running and then disconnect the vacuum to simulate the full pressure that the system can handle, and check for leaks or bulging hoses.

Edited by adam quantrill on Saturday 5th October 12:57

[Wedg1e]

maston said:

Got an fse on my 390 too , nice improvemet especially the throttle response :-)
Had it on the rollers a few months ago , 227 bhp and 254 ft/lb torque.
Happy with that and drives lovely

My 390SE has just the original adjustable (non-rising-rate) unit and made 256bhp/280lb.ft.
So I leave it alone

[wooly350i]

My fse rising rate version plays a bloody tune.

[maston]

Wedg1e said:

maston said:

Got an fse on my 390 too , nice improvemet especially the throttle response :-)
Had it on the rollers a few months ago , 227 bhp and 254 ft/lb torque.
Happy with that and drives lovely

My 390SE has just the original adjustable (non-rising-rate) unit and made 256bhp/280lb.ft.
So I leave it alone

Yes but your 390 has quite a few mods, mine excluding the fse is bog standard, I think anyway (have not head the heads off so don't know) !

I'm siding with the fse group, certainly made an improvement to my 390.
And as Adam has said, make sure all the fuel pipes are in good nick etc.

[dellyend1]

HI All,

Great to hear both sides of view and plenty of advice given which is why I do think this forum is great. I think that given my desire to install stage 1 heads and an uprated cam to my standard 350i I will keep an eye out for a second hand Rising rate valve on flea bay and then install but absolutely take the point about checking the condition of the fuel lines.

Cheers

[maston]

And an FSE is also recommended by Mr Mark Adams, who would argue against him !!!!!!!

[smash]

As I understand it Fuel pressure goes anywhere between 26-36psi from idle to WOT so that only the length of time injectors are open determines AFR.

Testing your regulator looks easy according to this (assuming you have a fuel pressure gauge of course!) http://www.vintagemodelairplane.com/pages/Download...

I can't see how the FSE will be any better than stock corrcetly functioning FPR unless we're saying the stock FPR leans out on transient to WOT where the FSE will essentially push more fuel in due to rising rate. All sounds very meh! Don't profess to be a tuner by any means but I'm struggling to see how you'll get anything more than possibly slightly sharper throttle response but nothing else.

Edited by smash on Monday 14th October 13:03

[Transmitter Man]

Bailey Performance say:

"Otherwise, if you really want an adjustable aftermarket reg we use Weber Alpha ones WEBER ALPHA INJECTION REGULATOR ADJUSTABLE 0-5 BAR WFR505 | eBay

Steer clear of FSE "power boost valves" we have removed several of them due to fluctuating fuel pressure, they are rubbish."

I have the Weber Alpha.

Phil
420 SEAC

[Jack Valiant]

I am not qualified to discuss the technicalities of how the FSE works with the TVR RV8.

What I do know is by experience what the FSE did for my car. On my stock 350i with the flapper system the FSE gave better throttle response and 15 BHp increase before and after on the same dyno (stock 350i = 160 BHp) When I fitted a 420 big valve and stage 3 ported engine and another cam the increase before and after was about the same in mean BHp improvement. (Stock regulator v FSE)

I agree with others on here that the FSE is no good for a 14CUX / Hotwire system as all it does is mess up the fuel maps

Finally the issue of fires ... bad hoses (20 years old etc) cheap clips and setting for more pressure than needed or designed, fitting locations, cheap plastic glassed fuel gauges are all issues that need to be consided carefully. Would I fit one to a stock flapper 350i yep!

Chris

[smash]

Well the rollers never lie - interesting to hear about a real world pre and post bhp change. I don't suppose you've got it but be interested to see the AFR pre and post FSE on WOT for the 350i?

Seems to suggest an adjustable rising rate regulator is a worthwhile investment on a flapper motor provided you captilise on it by setting it up on the rollers and also that the stock regulator is not flowing enough for optimal power.

Edited by smash on Monday 14th October 17:03

[smash]

Webber Alpha Blue any good? Looks about same price as FSE

http://www.burtonpower.com/weber-alpha-fuel-pressu...

[wooly350i]

Seriously when I start the engine on the wedge the FSE rising rate regulator plays a one note tune like some guy blowing a trumpet under the bonnet, it gets embarrassing specially when a new passenger hears it then looks at me as if to say 'what the fk', it may end up going as soon as ive saved enough for an RR session.

[adam quantrill]

That doesn't sound good - if you'll pardon the expression. Sounds like it needs an overhaul or replacement.