Porks bike carbs and boost project

[MicrAde]

Nice one on getting it running mate How far away are you from getting it running with turbo?

 

[pork]

Nice one on getting it running mate How far away are you from getting it running with turbo?

All that's needed now is return oil line, mate up exhaust, pipes from turbo to carbs, wideband O2,......and sort fuel pressure problem

So still a fair bit, but now i can move it about, it will be a lot easier

 

[pork]

Made a start on exhaust from turbo today.

I need to know where to put O2 sensor, can it be anywhere, or is there an specific place it should be?

Chucking it down so can't fit it yet

 

[l_jonez]

With the wideband I bought the was a minimum distance for placement when used with a turbo. For the life of me I can't remember the measurent and the booklet has long gone.

 

[pork]

With the wideband I bought the was a minimum distance for placement when used with a turbo. For the life of me I can't remember the measurent and the booklet has long gone.

Ok, good job I haven't jus welded a fitting on anywhere
Spose il wait till I get the sensor

 

[frank]

paul (pollyp) discussed it in his blog iirc neil, his 1st sensor failed so he moved it further away i believe ?

 

[pork]

paul (pollyp) discussed it in his blog iirc neil, his 1st sensor failed so he moved it further away i believe ?

Thanks, il have a look,
U wouldn't happen to have a page number, jus his blog is quite substantial, and a bit of a long read, very good tho.

 

[frank]

Thanks, il have a look,
U wouldn't happen to have a page number, jus his blog is quite substantial, and a bit of a long read, very good tho.

i think it has an index mate ? or else pm him eh

 

[pork]

i think it has an index mate ? or else pm him eh

Good idea

 

[pork]

Got couple off presents to myself through today

Walbro turbo carb pump, pumps 10-15psi max.

Petrol solenoid from LPG kit

Sytec carb regulator

And 0.5-4 psi pressure switch

 

[pork]

Here's the idea!

Beings I can only get the boost regulator down to 1-1.5 psi, I'm gunna try this

So normal driving, carbs fed by low pressure regulator at 0.5 psi.

As soon as the pressure switch senses ANY pressure from the turbo, it opens solenoid, allowing fuel from the boost fpr, which will rise accordingly with the boost pressure.

Hopefully this plan, along with the now lower pressure pump, will sort carbs flooding

 

[frank]

looks a bit more complicated than my return pipe method mate

 

[SirChris]

Here's the idea!

Beings I can only get the boost regulator down to 1-1.5 psi, I'm gunna try this

View attachment 21510

So normal driving, carbs fed by low pressure regulator at 0.5 psi.

As soon as the pressure switch senses ANY pressure from the turbo, it opens solenoid, allowing fuel from the boost fpr, which will rise accordingly with the boost pressure.

Hopefully this plan, along with the now lower pressure pump, will sort carbs flooding

Stuff this

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[pork]

looks a bit more complicated than my return pipe method mate

Where abouts would that pipe go on my set up mate? Tbh, I didn't really understand lol

I make these sort off things all the time at work
Most of bits are on the shelf so it's free to me.

 

[pork]

Stuff this

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Haha! Why's that

 

[frank]

Where abouts would that pipe go on my set up mate? Tbh, I didn't really understand lol

it works just like a boost controller neil, you bleed off some of the pressure, so where the pipe enters the carbs you fit a T piece, and the return pipe has a #70 mainjet shoved inside to limit the flow

 

[pork]

it works just like a boost controller neil, you bleed off some of the pressure, so where the pipe enters the carbs you fit a T piece, and the return pipe has a #70 mainjet shoved inside to limit the flow

Aaaaaaaaaahhhhhh!!!

Now I get ya! Il shall try this to!

 

[SirChris]

Haha! Why's that

Way to complicated for my liking

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[pork]

Way to complicated for my liking

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Fair enough mate.

 

[pork]

So iv made this, it wasn't that hard to do

Started by making a new hole in boost regulator. Made it quite small to restrict flow

Made swirly pot bit prettier, and built it all up.

If it don't work, all I gotta do is blank off new hole and I'm back to where i started

 

[SirChris]

Looks like a home made bomb

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[pork]

Looks like a home made bomb

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Hopefully it won't be!

 

[karlj]

Fair play this is turning into quite the build

 

[pork]

Fair play this is turning into quite the build

Cheers mate

 

[pork]

Right !!!

Still floods the carbs, even with 0.5psi

So it's got to be something wrong with the floats

Rebuild kits are £15 each and need 4

Carbs only cost me £30, and were pretty bad shape, so do I buy another set, or rebuild these?

 

[Rob]

not tempted to change to bike TB's?

 

[pork]

not tempted to change to bike TB's?

To much money, plus would have to get megasquirt which is exspensive

 

[frank]

Right !!!

Still floods the carbs, even with 0.5psi

So it's got to be something wrong with the floats

Rebuild kits are £15 each and need 4

Carbs only cost me £30, and were pretty bad shape, so do I buy another set, or rebuild these?

the floats have only got a set buoyancy tho eh neil, if the needlevalve has,nt got a wear ring around it a rebuild kit wont help, try the return method (its worked for the past 5 yrs on our karts np)

 

[pork]

the floats have only got a set buoyancy tho eh neil, if the needlevalve has,nt got a wear ring around it a rebuild kit wont help, try the return method (its worked for the past 5 yrs on our karts np)

Been on couple of cbr forums, and it does sound like the floats ain't sealing right

I've got a couple of things to try to test, but gotta take carbs off

I thought about it, but the return line to the tank will be seeing higher pressure than what's going to the carbs after the regulator, due to electric pump

 

[frank]

Been on couple of cbr forums, and it does sound like the floats ain't sealing right

I've got a couple of things to try to test, but gotta take carbs off

I thought about it, but the return line to the tank will be seeing higher pressure than what's going to the carbs after the regulator, due to electric pump

nah, you reg it down to about 2 psi, and the return will damper that down.
like i say, our karts have a pulsepump (vacuum powered off the inlet tract) so our carbs probably see about 2 psi @ idle (during the idle high vacuum pulses) and that probably drops in pressure when the throttle is opened (pulsepumps are more suited to 2 stroke crankcase pulses) and our carbs piss fuel @ idle if the return pipe is,nt fitted

 

[pork]

What I thought, was beings the electric pump pumps at about 10psi, there will be about that going through the return line to the tank.

So there's 10 psi swirling about in swirl pot. Then comes out of reg to carbs, where you suggest to put another return line to bleed off some off the pressure, but that return line will have to be plumbed into the fuel return on the swirl pot which is running at a higher pressure, so the return/bleed off from the carb won't be able to flow back to the tank.
See what I'm saying?

Or am I getting it wrong?

 

[frank]

Tee off the carb feed neil (where its being reg,d @2psi) and run that return back to the tank, like a k11

 

[pork]

Tee off the carb feed neil (where its being reg,d @2psi) and run that return back to the tank, like a k11

I get the tee off part.

Do you mean run a separate return to the tank?

 

[frank]

I get the tee off part.

Do you mean run a separate return to the tank?

just bench try it first eh

 

[pork]

just bench try it first eh

I shall indeed,

This is last hurdle before I plumb up turbo

I was still at some point going to fit a larger return to the tank too.

I'm a little worried about working on fuel tanks tho!

 

[l_jonez]

Right !!!

Still floods the carbs, even with 0.5psi

So it's got to be something wrong with the floats

Rebuild kits are £15 each and need 4

Carbs only cost me £30, and were pretty bad shape, so do I buy another set, or rebuild these?

mine did the same no matter how much i altered the float levels. a full strip and bath in the ultrasonic cleaner sorted it out

 

[pork]

mine did the same no matter how much i altered the float levels. a full strip and bath in the ultrasonic cleaner sorted it out

I did that before I fitted tgem, but I didn't replace any seals

Il see what state they are in again once they are off

 

[l_jonez]

Neither did I, maybe I was just lucky

 

[pork]

Neither did I, maybe I was just lucky

Who done your ultrasonic cleaning? Was it exspensive ?

 

[l_jonez]

Done it myself, I've got a ultrasonic cleaner.

 

[pork]

Done it myself, I've got a ultrasonic cleaner.

Really? Was that expensive?

I got a quote once for sending carbs off for strip/ultrasonic/rebuild.......over £240!

 

[l_jonez]

Yep. It was given to me years ago, it's come in quite handy.

 

[pork]

Is a generic carb cleaner any good, or is best way to do it ultrasonicly

 

[l_jonez]

It's worth a try, but you'd need enough to bath it in overnight.

 

[SirChris]

What about engine degrease gunk? That would give it a good clean.

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[pork]

Either way, Gunna attempt sneaking out tomorrow and take carbs off for a look.....meant to be having Xmas family dinners and shiz

 

[Belly93]

Either way, Gunna attempt sneaking out tomorrow and take carbs off for a look.....meant to be having Xmas family dinners and shiz

ultrasonic cleaners are good for alsorts, we have them at work for cleaning injector parts, turbo feed and return pipes and allsorts of other things, they work really well

 

[Belly93]

http://www.ebay.co.uk/sch/i.html?_sacat=0&_sop=15&_nkw=ultrasonic+bath&_frs=1

 

[pork]

My Xmas present came today

 

[SirChris]

Man I want an Xmas pressie like that.

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