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evolotion

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Member #: 83
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Glasgow, Scotland




On 17th of Mar, 2007 at 08:57pm Bat said:
Hi,
That's a good point. Only Rover would reduce the power to a fuel pump!
Cheers,
Gavin :)


alot of mitsubushis have a balalst resistor to the fuel pump, all the lancer evolutions for example. fuckign daft idea and a proper waste of space.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


metroturbo

806 Posts
Member #: 989
Post Whore

North Yorkshire

The ballast resistor slows down the pump and increases its life. It isn't used with the same pump on the Maestro and Montego turbos, so I wouldn't worry about linking it out.


On 17th of Mar, 2007 at 08:55pm Metro Turbo said:


Its still got the ballast resistor in place at the moment, is it safe to link it out?

Are there any negative side effects to be careful of if I link it out?


neilj1678

194 Posts
Member #: 1297
Advanced Member

Sunny Stockport

Another possible culprit is the pressure regulator. It does sound like fuel starvation to me, I had a similar problem on mine a few years ago and it turned out to be the regulator pressure being set too low. This meant at full throttle the engine was pulling more fuel out of the float chamber than the pump and regulator were putting in. Going through the gears, 1st and 2nd were ok as I wasn't on full throttle for long enough to empty the float chamber but in 3rd, 4th & 5th it would do it after about 15 seconds at full throttle.
If I backed off the throttle for a bit to allow the float chamber to refill the power would be back again.


metroturbo

806 Posts
Member #: 989
Post Whore

North Yorkshire

I have been in a Maestro Turbo that was running 250 BHP, and the HIF carb was coping admirably.

Could it be a combination of a restrictive fuel line, and jet, that causes the fuel starvation on the A Series?


On 18th of Mar, 2007 at 03:08pm BENROSS said:
had the same problem and know many peeps who has been there

the HIF range of carbs struggle with fuel supply delivery been out stripped in the float bowl at around these power figures

the answer here is to remove the carb needle valve (the fuel jet)

and drill this out carefull to 2.9mm no bigger or smaller 2.9mm

then seat the valve in using very fine lapping past, taking any! micro scratches out of the seat

Mr Avonbar can..... supply you with a modded one for around £11 BUT..... *frown*
their postage fees leave somewhat to be disired *frown*

my moneys on this if all else checks out *wink*

edit: The fuel pump from the mg metros are rated at fuel flow rates at a shade ove 500BHP

in good order


neilj1678

194 Posts
Member #: 1297
Advanced Member

Sunny Stockport

double post

Edited by neilj1678 on 18th Mar, 2007.


Metro Turbo

193 Posts
Member #: 437
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Sunny Blackpool




On 18th of Mar, 2007 at 05:27pm neilj1678 said:
I had a similar problem on mine a few years ago and it turned out to be the regulator pressure being set too low.Going through the gears, 1st and 2nd were ok as I wasn't on full throttle for long enough to empty the float chamber but in 3rd, 4th & 5th it would do it after about 15 seconds at full throttle.
If I backed off the throttle for a bit to allow the float chamber to refill the power would be back again.


Yep thats the same symptoms as mine had *oh well*

If I ever have future issues with the fuelling once I up the power again, I will fit an in-line fuel pressure gauge and see whats what.

Tim

89' Metro Turbo
157 BHP , 170 lb ft @ 15psi .... So far....
Mikeanics Rolling Road
WINNER OF RETRO CARS SHOW BEST 80's MODIFIED CAR



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