Turbo upgrade for TDI?

[GoLfMan]

what kind of turbo upgrade can I look at for my Polo TDI.

the tiny turbo is holding back performance now as it tapers off long before the redline even with a chip in it.

i can get ahold of a KO3s and thought it would be a nice upgrade.

thoughts?

[Preen59]

Thoughts?? How about this...

It goes pretty good as is. It's your daily driver.. Leave it alone!

[Oneofthegreats]

Thoughts?? How about this...

It goes pretty good as is. It's your daily driver.. Leave it alone!

Can't argue with that.

Why pull it off the road & have your daily sit around for umpteen week's while you fab up turbo gear?

Leave it & enjoy it.

Build your mk1! haha

[Pumpe-Düse]

I don't know how anyone could say "it goes pretty good." The Polo 1.9 TDI (the lightest and fastest 1.9 TDI equipped car on sale in Australia), even with a chip, is hopelessly slow.

Go for the turbo upgrade. Along with head work, camshaft, valvetrain etc.

[h100vw]

I reckon the TDIs have different turbos to the petrol motors. They run much higher boost than a petrol, so I am sure they'd never keep up with the demands of a diesel engine.

You'd need a turbo off a more powerful diesel motor.

Gavin

[Pumpe-Düse]

Get the turbo of one of these...



lol

[Preen59]

I don't know how anyone could say "it goes pretty good." The Polo 1.9 TDI (the lightest and fastest 1.9 TDI equipped car on sale in Australia), even with a chip, is hopelessly slow.

Go for the turbo upgrade. Along with head work, camshaft, valvetrain etc.

Well that's true if the road you drive to work and back on has no speed limits with minimal traffic. My chipped Caddy goes plenty good enough, good enough to keep up with a mid 90's V6 commodore. The Polo TDI goes better than my Caddy.

If you think that isn't fast enough for something that you use every day as a run around to get to work and do the shopping, you have a very warped imagination.

[GoLfMan]

I reckon the TDIs have different turbos to the petrol motors. They run much higher boost than a petrol, so I am sure they'd never keep up with the demands of a diesel engine.

You'd need a turbo off a more powerful diesel motor.

Gavin

the turbo on my TDI is much smaller than a KO3s i recon, the turbo on these things is TINY !

Maybe the GT TDI turbo is bigger and from what i've heard bolts straight on?

[GoLfMan]

I don't know how anyone could say "it goes pretty good." The Polo 1.9 TDI (the lightest and fastest 1.9 TDI equipped car on sale in Australia), even with a chip, is hopelessly slow.

Go for the turbo upgrade. Along with head work, camshaft, valvetrain etc.

i wouldnt say its hopelessly slow, its a gutsy little bugger and I thoughroughly enjoy driving it

[h100vw]

the turbo on my TDI is much smaller than a KO3s i recon, the turbo on these things is TINY !

Maybe the GT TDI turbo is bigger and from what i've heard bolts straight on?

It's not just about the size!!??!! The some of the ones on the TDIs have variable vane technology to make them even more flexible.

Have a look and see what boost diesels run. I think you'll find it's nearly double that of a petrol turbo. I did some datalogging on a TDI Audi a few years back and I though the wastegate was welded up.....

Gavin

[Pumpe-Düse]

A question Golfman.. have you done suspension work? If modding the TDI, personally, I'd attack the handling (or lack of any) before anything else. Some good springs, shocks & swaybars plus wheels & tyres (wider rim, lower profile tyre) should change how it corners (or doesn't) pretty dramatically. Just my opinion anyway.

[h100vw]

Are you sure it's running right? Not that I'd pitch a diesel Polo against anything with 200 horsepower and expect a good result.

Gavin

[Oneofthegreats]

If you think that isn't fast enough for something that you use every day as a run around to get to work and do the shopping, you have a very warped imagination.

My old everydayer was a gen3 keeper uppera! haha

But obviously couldn't beat polo gti's! haha. that's the bench mark for every dayer's I've been told!

[gregozedobe]

I'm having trouble with the whole idea of buying a Polo TDI if one of your most important criteria is to drag pople off from a standing start.

It would be more cost effective to save your $$$ now and look at different vehicles (most likely petrol), and consider the following:
Power to weight ratio
Shape of power curve (shallow curve is better than steep)
Traction off the line
Gearing

In terms of acceleration (in a straight line) for your dollar, the Mazda MPS3 is pretty fast, especially once you get moving (IIRC it has some very impressive 3rd gear times). Of course if going around corners in the wet while staying completely in your own lane is also important you may need to look elsewhere.

[Preen59]

My old everydayer was a gen3 keeper uppera! haha

But obviously couldn't beat polo gti's! haha. that's the bench mark for every dayer's I've been told!

Haha trust you to come in with something like that, Tim! And the Poolo GTI isn't the Benchmark.. It's the ultimate speed machine!!

I'm having trouble with the whole idea of buying a Polo TDI if one of your most important criteria is to drag pople off from a standing start.

It would be more cost effective to save your $$$ now and look at different vehicles (most likely petrol), and consider the following:
Power to weight ratio
Shape of power curve (shallow curve is better than steep)
Traction off the line
Gearing

In terms of acceleration (in a straight line) for your dollar, the Mazda MPS3 is pretty fast, especially once you get moving (IIRC it has some very impressive 3rd gear times). Of course if going around corners in the wet while staying completely in your own lane is also important you may need to look elsewhere.

I really think that if you want to seriously compete against other people.. Do it at a competition event.