Porks bike carbs and boost project

[h701micra]

The SC is pumping air into the engine so I don't get how it can be fighting the engine for air

Its sounds healthy enough while running just a belt squeal. The 2 things I'd look at is belt tension and pulley size. They're easier than redesigning your setup

 

[pork]

All pulleys are same as it would be on the vw

Il try different tensions later too.

If not il have to try the tensioner on other side like this

 

[h701micra]

Hope its the easier solution

 

[pork]

Had a eureka moment,


I remembered that with the supercharger off, when I revved, there was enough force from the turbo to turn the supercharger round.
So thought that the build up of pressure before the supercharger was enough to stall the rotors

Then thought, why is the vw setup with s/c first.

So disconnected turbo from s/c inlet and got this......



There's a bit of squeal when off throttle, but I think that's because there's no throttle pre charger now

Means that all
My lovely piping I. Made will have to be redone !

 

[pork]

The pressure I'm getting is 7psi, that's with bypass open too

 

[Belly93]

did you get the coilpack plugs i sent mate?

 

[pork]

I did, thanks mate

 

[Belly93]

no bother, vw possibly fitted the tensioner before the s/c to sort of push the belt against the pulley if you understand that?

 

[pork]

Space dictates where I can fit mine

 

[Belly93]

i understand that

 

[h701micra]

So what's next Neil?

Sounding much better now its not fighting with the turbo

 

[pork]

Re do the pipes
Gunna move idle/vac bypass valve closer to s/c
(I left it by plenum as to keep pressure in boost pipes to operate the air actuator)

Jus scribbling out sine ideas now.

 

[h701micra]

Is it a case of splash more money on pipework or re-use what you got?

Is there a way you can use a smaller feed pipe to the actuator?

 

[pork]

I can jus chop up what I've got now......which is free.....which is good

 

[h701micra]

We like free

 

[pork]

Wonder why I can't pump turbo into the charger ?
Oh well, tis what it is

 

[h701micra]

Well Lancia did mate.. look into that instead. So much better than the VW setup

 

[pork]

I'm wondering if it's the thoe of charger that I'm using that doesn't like the incoming pressure

 

[h701micra]

Its only a pump. It'll pump whatever its given

 

[Enuo]

Well you've addressed the belt contact one side of the electric clutch pulley, what about the other side? What is the contact etc like from crank pulley to clutch?

 

[pork]

There's plenty on that one mate

 

[pork]

So I'm gunna try this out now ......

..... Which is ginna be really snug in there now ,

Still can't get my head round why I can't use the original route,

 

[pork]

Chap on RR raised a good reason for what it might not off worked

[/quote]I think it has to do with the air capacity, how much air is going into the SC (litre) how much air can a stand alone SC deliver (litre) if theres more litres going into the SC as the SC can deliver on its own, then the SC is going to act as a restrictor, try to manage the ingoing airflow on the SC and lets see what happenes.[/quote]

 

[frank]

thats the problem with positive displacement type forced induction neil, there are a lot of forces involved (why your car slows down/decelerates if you lift in a low gear for example, engine braking)

 

[pork]

Il try the new air route and see what happens
If it still don't work, il remove it alm

 

[frank]

Il try the new air route and see what happens
If it still don't work, il remove it alm

centrifugal superchargers are far more forgiving mate

 

[pork]

Bit late to be trying one of those now lol

 

[pork]

Bit late to be trying one of those now lol

 

[jamier2007]

Come on Neil I wanna see a video of this thing being hammered!

Sent from my Nexus 4 using Tapatalk

 

[pork]

So do I !!! Honest

 

[pork]

Made a start on the rejig

Vac/idke bypass valve is now directly on the s/c outlet going back to inlet pipe

 

[pork]

While I'm at it, gunna change my air operated valve to a fly by wire TB

Any speaxial consideration I need to take into account before I buy any old one?

 

[frank]

While I'm at it, gunna change my air operated valve to a fly by wire TB

Any speaxial consideration I need to take into account before I buy any old one?

they might be stepper motor eh neil

 

[pork]

How would I operate it to jus be open, or closed

 

[frank]

How would I operate it to jus be open, or closed

dont those need controllers/drivers mate ?

 

[pork]

No idea lol

Can't I jus add a voltage? And expect it to work

 

[frank]

your ecu might have the i/c/v stepper output ? maybe use that

 

[pork]

Ooo, il look into that

 

[Enuo]

Some stepper motor throttle body's have built in controllers, and convert throttle position from a 5v PWM signal, in which case you can get fully closed at 0v and fully open at 5v DC

 

[pork]

How do I know which has controllers or not?

 

[Enuo]

By reading the service manual for the donor vehicle I'm afraid.

 

[pork]

Daaaaammmmmmmmm

Loooooooonnnnnnnnggggggggg

 

[Enuo]

Try the post 2002 almera throttle body, I reckon that would be a good bet for being the PWM type

 

[pork]

Cool! Cheers mate

 

[pork]

..........More progress

 

[pork]

More pipage

 

[pork]

Anyone got a alternator bracket, and the tensioner part?

 

[h701micra]

You've cleaned me out
I'll have a look though

 

[pork]

Well that didn't work, I'm gunna need to redesign the whole supercharger/clutch bracket, just to much flex in it
Need to rearrange pulleys bla bla bla ......bored now!!

So I've removed it like I said I would after this attempt, changed it back to just turbo and gunna map it like that and hopefully get some use out if it

Il design and build the supercharger stuff over winter when I've got less to do, it's just taken up sooo much time. Booooooo

Another problem I've been having is a lot of unwanted attention on the car, think it's down to all the shiny stuff out on the front

My neighbour caught a load of people goin over the car the other week! Had the break in the over month, and the police don't like it to much either!

So removed this lot.....

......got one of these for £15 to go in it's place, starlet top mount intercooler, so there a hell of a lot less pipes!

And out one off these back on front end, bit more sleeper style

 

[pork]