Hi guys I'm in the process of getting a kit made for myself of a reduced sized supercharger pulley and smaller belt , I'm wondering if i got my car dyno'd before and after having it fitted would anyone else want a kit making up as well if the price was reasonable 

What changes is this going to make to a supercharger function in a 1.4TSI Twincharger from 800-2,400 rpm or onto 3,500rpm?

4 minutes ago, Awayoffski said:

What changes is this going to make to a supercharger function in a 1.4TSI Twincharger from 800-2,400 rpm or onto 3,500rpm?

10 percent reduction in pulley size for a quicker spool , should get more lower end torque . 

If you reduce the size of the pulley you will reduce the operating range of the supercharger, its maximum speed will be reached earlier and it will cut out, leaving a big hole in your torque until the turbo reaches full boost.

 

Just now, FlexibleMouse said:

If you reduce the size of the pulley you will reduce the operating range of the supercharger, its maximum speed will be reached earlier and it will cut out, leaving a big hole in your torque until the turbo reaches full boost.

 

the supercharger feeds the turbo so you would have your turbo spooled faster meaning if your going stage three and having a bigger turbo your turbo would kick in faster 

2 minutes ago, FlexibleMouse said:

If you reduce the size of the pulley you will reduce the operating range of the supercharger, its maximum speed will be reached earlier and it will cut out, leaving a big hole in your torque until the turbo reaches full boost.

 

 

I'm very familiar with how the setup works, indeed I have been tinkering myself since I bought the car and have looked into modifying the supercharger myself. If you want the turbo to spoil quicker just use a manual boost controller to keep the wastegate closed longer, but in doing this I found the supercharger just cuts out earlier to compensate. Big tubo setups often bypass the supercharger completely because there is little benefit in modifying it.

Go back to the Supercharger pulley reduction thread about 3 years ago in this section smart people posted there.

http://briskoda.net/forums/topic/293118-supercharger-pulley-changes 

?

How are you proposing getting more power down onto the road with a Standard DQ200 DSG and the usual tyre sizes with this extra your getting from the Supercharger, or actually not as it will be?

Edited 18 April, 20179 yr by Awayoffski

we been through this some years ago . at the end we figured that there is no way to pull that off . they used a 2 steped pulley design due to space issues in the engine bay . some guy even contacted eaton and they also said that they drasticly changed the pulley design to Volkswagens needs . 

i can give you the eaton model number if you want to do some reasearch on your own .

15 minutes ago, Awayoffski said:

Go back to the Supercharger pulley reduction thread about 3 years ago in this section smart people posted there.

http://briskoda.net/forums/topic/293118-supercharger-pulley-changes 

?

How are you proposing getting more power down onto the road with a Standard DQ200 DSG and the usual tyre sizes with this extra your getting from the Supercharger, or actually not as it will be?

all i see is a lot of people talking hypothesis and no one actually having ever done it!

Very true, and the reason is that getting a quick Mk2 Fabia vRS is not difficult or expensive, get to Stage 2 and then see if that is not quick enough.

Costs under £1,000 and you can even have a reliable car.

 

What are using your car for and how fast do you want it to go?

How are with an Insurance Company that will provide cover for your declared mods?

Edited 18 April, 20179 yr by Awayoffski

46 minutes ago, thomasaspin said:

all i see is a lot of people talking hypothesis and no one actually having ever done it!

You are exactly right, many have considered it and after researching the mod they have decided it is impractical. We are all after more power for minimal outlay but there are easier ways of achieving it than modifying the supercharger. If you are after torque then you want more peak boost, you need to get around the torque limiter in the DSG, increase the duty cycle on the N75 or use an MBC to do the same, and fool the 3 map sensors so you can keep the supercharger running even when the turbo is at peak boost. Between the turbo and supercharger you already have hardware capable of blowing the head gasket, you just need to find a way of stopping the supercharger from disengaging.

59 minutes ago, FlexibleMouse said:

You are exactly right, many have considered it and after researching the mod they have decided it is impractical. We are all after more power for minimal outlay but there are easier ways of achieving it than modifying the supercharger. If you are after torque then you want more peak boost, you need to get around the torque limiter in the DSG, increase the duty cycle on the N75 or use an MBC to do the same, and fool the 3 map sensors so you can keep the supercharger running even when the turbo is at peak boost. Between the turbo and supercharger you already have hardware capable of blowing the head gasket, you just need to find a way of stopping the supercharger from disengaging.

see everyone seems to be putting me down for coming up with this idea but no one has actually tried it themselves and thats what bugs me your putting down my idea like I'm some sort of idiot but when say a mini cooper S wants more power they reduce the pulley size when a rs4 wants more power it reduces the pulley size just because ours is used lower down the power band doesn't mean a reduction in pulley size wont see some gains wheres the hard evidence against this working? 

Don't see it as people putting you down, just see it as multiple people giving you multiple reasons why it may be money wasted, or an idea that may not work out as well as you'd hope!

 

Either way, I look forward to seeing how you get on.

I'm absolutely not putting you down, as I said we are all in the same boat because we want power without spending much money. The supercharger has a maximum RPM of 17500, it is driven at 5 times the crank speed and so MUST disengage at a maximum 3500 RPM. The supercharger is a sealed unit filled with oil and by all accounts is a bugger to remove. So if you have to remove it to alter the drive ratio, why not just replace it with a bigger unit that can operate through the whole rev range instead?. The roots blower generates massive heat so replacing it with a twin screw unit would improve efficiency too. Im not saying it is impossible, just impractical. If you want more power you could achieve the same without all the effort by simply putting in a bigger turbo, then bypassing the small supercharger so it doesn't become a restriction. The turbo is right there at the front of the engine, why go the extra effort?. Even VW said the supercharger was an unnecessary complication, that's why the new generation of 1.4 tsi's don't have it. I really wish you luck if you still want to modify the supercharger, by all means keep us informed.

11 hours ago, Awayoffski said:

Very true, and the reason is that getting a quick Mk2 Fabia vRS is not difficult or expensive, get to Stage 2 and then see if that is not quick enough.

Costs under £1,000 and you can even have a reliable car.

 

What are using your car for and how fast do you want it to go?

How are with an Insurance Company that will provide cover for your declared mods?

 

my insurance premium stayed the same with all mods (Intake / Exhaust etc..) until you put in Engine chiptuning then it goes up 25%, that would cover stage 1 and maybe 2. At least this is the case on moneysupermarket

Edited 19 April, 20179 yr by Kobayashi

Sorry OT but which insurance company did you go with that gave you that on Moneysupermarket for your declared mods?

5 hours ago, Awayoffski said:

Sorry OT but which insurance company did you go with that gave you that on Moneysupermarket for your declared mods?

'quote me happy' from Moneysupermarket - there was a few. Kept going back to change details to find out which mod bumped up it up by 25%.

 Mine is due in a month so was playing around.

 

Intake, Uprated brakes, Exhaust did nothing to the quote, i even changed the car value from £5000 to £7500 (40k miles) and no change, once i took off the chiptuning the insurance went back to normal again. If you declare chiptuning it defo bumps it up. theres no option for stage 1,2,3 ECU map etc.. thats all im saying. 

11 hours ago, Awayoffski said:

Sorry OT but which insurance company did you go with that gave you that on Moneysupermarket for your declared mods?

Hi,

If you need any help with insurance at all then please feel free to drop me a line.

Regards,

Dan.

Thanks Dan but no problems getting insurance only with Adrian Flux who are not so good at 'quoting happy', and if you do give your selves business you tend to take the p!th the next year.

george, 

AKA a past happy Adrian Flux valued customer that you tried taking the P!th with.

1 hour ago, Awayoffski said:

Thanks Dan but no problems getting insurance only with Adrian Flux who are not so good at 'quoting happy', and if you do give your selves business you tend to take the p!th the next year.

george, 

AKA a past happy Adrian Flux valued customer that you tried taking the P!th with.

Wouldn't even insure me in my area so went with admiral lol

On 19/04/2017 at 08:07, FlexibleMouse said:

I'm absolutely not putting you down, as I said we are all in the same boat because we want power without spending much money. The supercharger has a maximum RPM of 17500, it is driven at 5 times the crank speed and so MUST disengage at a maximum 3500 RPM. The supercharger is a sealed unit filled with oil and by all accounts is a bugger to remove. So if you have to remove it to alter the drive ratio, why not just replace it with a bigger unit that can operate through the whole rev range instead?. The roots blower generates massive heat so replacing it with a twin screw unit would improve efficiency too. Im not saying it is impossible, just impractical. If you want more power you could achieve the same without all the effort by simply putting in a bigger turbo, then bypassing the small supercharger so it doesn't become a restriction. The turbo is right there at the front of the engine, why go the extra effort?. Even VW said the supercharger was an unnecessary complication, that's why the new generation of 1.4 tsi's don't have it. I really wish you luck if you still want to modify the supercharger, by all means keep us informed.

So is this supercharger a servicable item will oil need changing as it gets old? And excuse my lack of knowledge but does the supercharger actually make a difference only thinking if your in sport and booting all gear changes come in after the supercharger rev range if that makes sense so it changes at red line but changes gear and that goes in at like 4000rpm

Edited 20 April, 20179 yr by Grantwebster

No it is a sealed unit meant to last the life of the car. The supercharger is there to provide torque at low RPM because the turbo is quite large in relation to the displacement of the engine. If you didn't have the supercharger you would get turbo lag on overtakes etc. You only really use the supercharger if driving hard in manual and keeping the RPM low. If you use D or S mode then it activates once on hard acceleration then the RPM stays high enough that it is not needed again.

22 minutes ago, FlexibleMouse said:

No it is a sealed unit meant to last the life of the car. The supercharger is there to provide torque at low RPM because the turbo is quite large in relation to the displacement of the engine. If you didn't have the supercharger you would get turbo lag on overtakes etc. You only really use the supercharger if driving hard in manual and keeping the RPM low. If you use D or S mode then it activates once on hard acceleration then the RPM stays high enough that it is not needed again.

Well does that mean it doesn't use it when just pootiling about cos its either that or flat out if I overtake I make sure I'm in the turbo to get a shift on and job done I find it a bit bogged down when in supercharger 

Basically it is only activated when at high load and low RPM.If you use M mode and use a lot of pedal but shift up before 3500 you are going to be using the supercharger a lot. It's easy to hear and feel when it is activated, you hear the whine and I can feel the vibration through the pedals. When using S mode or D at high load the DSG keeps the revs in the turbo range so the supercharger only activates once to spool up the turbo.