building a 2L 8v for turbo?

[D3bb4]

Yes well, i've never seen the pistons from these motors - hence i have said so numerous times. 7psi is about average factory setting for alot of older turbo motors. 11-12psi is limit of skylines with ceramic turbine wheels, else they break... but if you say that 15psi is average, go for it.

If you would kindly notice: i did say that the motor will get stuffed if the tune is wrong... but excessive pressure/force on the pistons can also cause failure.... you shall be stressing engine components beyond their designed loads - but these loads would have a safety factor when designed/built, hence why you can alter the engine, and not have these components fail.

Size of turbo: larger turbos flow more air. More air means needs more fuel for same compression/boost compared to a smaller turbo - less flow, less fuel needed, same boost. Is what i was saying.

High compression can cause rings to go, as pressure can force it's way past, or can crack ringlands. You seem to have stated that the ringlands must be rather well spaced and it is not an issue for these motors... ok...

I would *NEVER* base a judgement on the fact that it's a german engineered motor. Not saying that the engineering is bad; but they made the motor to be a 2l n/a motor, not a 300hp turbo motor... and thus if you shove a turbo on and run 300hp... it was not designed for that, as such a design would cost more to build, and thus you are putting stress on engine components that was not meant to be there... so obviously the engine will not last as long, regardless of the tune...

[Valver.]

It's not about the tune at all; it's about the load on the pistons/rings/ringlands. You pressurise the cylinders through use of boost, and not many stock turbo motors can handle 15psi boost for long, so i really don't think a stock n/a motor can. Tune has to do with if the motor detonates and dies through pinging. If you run alot of pressure, it's going to be your rings and/or ringlands that go prematurely. 4psi is regarded as safe boost for a stock n/a motor; anything else is technical/varies depending upon decompressing the motor and size of the turbo.

As mentioned before; i'm not familiar with the specs of these motors, nor what they can handle, but 15psi through an internally stock n/a motor - will not last long.

You should also add an intercooler to your list; and piping. Custom stainless steel piping through a shop will likely set you back about $750 last i checked.

The weak point is the conrods on these engines; the rings are not an issue at all. I have done a couple lof years research into all of this prior to building my own setup. There are are numerous setups sold by some of the best engineering firms in Germany and all they use is a decompression gasket. It is much the same with VR6 turbo's well beyond 400hp.

Just look at some of compression ratios of the new turbo engines even from VAG itself.

It is swings and roundabouts anyway: one either runs higher boost and less compression, or less boost and more compression. The ultimate cylinder pressure is much the same in the end anyway.

You should also consider the millions of aftermarket turbocharged Hondas with 11:1 and above compression ratios. They are widely regarded as some of best engines to turbo ever built and you won't find many people having problems with excessive blow-by.

An intercooler setup can be had for a couple of hundred dollars nowadays; hence my $800+ of misc. parts

[Valver.]

I would *NEVER* base a judgement on the fact that it's a german engineered motor. Not saying that the engineering is bad; but they made the motor to be a 2l n/a motor, not a 300hp turbo motor... and thus if you shove a turbo on and run 300hp... it was not designed for that, as such a design would cost more to build, and thus you are putting stress on engine components that was not meant to be there... so obviously the engine will not last as long, regardless of the tune...

In theory, you're right. Ausgolfer isn't basing that comment on theory, though. There are so many of these engines that have been turbocharged without a single problem and that is proven fact. I hate theory as everyone seems to apply it to everything

You've ruined this thread anyway: you have said yourself you don't know anything about these engines so why are you giving advice? No offense intended but it doesn't make much sense, does it?

By the way, that monster 16vT made 550BHP at the wheels on stockies... but then the block tore in half - LOL

[Jarred]

As far as I know, ( I spoke to the bugger last nite) Josh just wants a turbo'd 2L. doesn't have to run massive boost and put out massive power, just has to be reliable, and have about 140 kw, so we're talking pretty low boost numbers, 7psi should be round about enough (depending on compression).

But, josh It'll cost ya through the a##. Sure he has access to alot of machines and cheaper parts etc through work, but I donno, it could get very expensive very quickly.

What about 'borrowing' a SC form work???

[Golf Houso]

If he can sort out the engine management... everything else will be alot less difficult. I suggest he attack the most difficult problem, and then worry about everything else. Everything else but the ECU can be retrofitted... He should start there, actually I'll start there!

http://www.bahnbrenner.com/vw_audi/p...D2_Turbo_Eprom

Just remove the chip on the board, weld the generic chip housing onto the board and plug in the new chip! If you know an engineer or auto electrician they'll take about 20 minutes to fit it. All these automotive chips are actually just generic programmable chips which can be reflashed, properties altered, copied and from which duplicates can be made. The powerchips guy on Ebay can make you a chip with any specifications, psi, fuel pressure, rpm limiter, speed limiter... anything really, just a matter of you finding the specifications you want.

I'm definately going back to the mk3 8v in a few years...

[GoLfMan]

As far as I know, ( I spoke to the bugger last nite) Josh just wants a turbo'd 2L. doesn't have to run massive boost and put out massive power, just has to be reliable, and have about 140 kw, so we're talking pretty low boost numbers, 7psi should be round about enough (depending on compression).

But, josh It'll cost ya through the a##. Sure he has access to alot of machines and cheaper parts etc through work, but I donno, it could get very expensive very quickly.

What about 'borrowing' a SC form work???

what you are saying is correct,
im not looking for MASSIVE power figures, as i told you last night just a nice figure like 140kw (at the fly) would be plenty for everyday driving in a 900kg Polo. 10PSI would be plenty until i wanted to go further...

what about the TDi manifold (someone said it would fit) and turbo to suit, all plumbed in (i can do piping.) with a chip to suit, fellas im not looking to build a record breaking engine here! maybe a cam (from the fellas at CROW) if im feeling friski

i can get metal cheap so stainless piping wouldnt be an issue, nor would an exhaust, or a turbo for that matter my Boss has 6 sitting at work and has offered one to me! and the (polyurethane?) joining bends really shouldnt be that expensive...

i think one of my bigger problems is finding a '97 2L engine otherwise this thing can never happen!

Borrowing a SC from work?! one of those SC would take up half my engine bay!

[Golf Houso]

The tdi manifold does fit with no issue, it would have ran a k03 in it's previous life. The downpipe is the main issue, as they differ in left and right hand drive cars, if you can fabricate one that would solve alot of issues!

So now all you need are appropriate injectors, a gasket spacer $115 US from kinetics motorsport to lower compression, and a chip, C2 motorsports also do a wide variety of chips including one for a non intercooled 8psi 8v aba set up putting out around 160hp (150kw at the crank), they're about 200-300 as well, and are the same as the ones described in an earlier post.

[peedman]

We dont have aba motors here so those chips wont work. You can always megasquirt it if u think ur capable with wiring.

[Golf Houso]

Whats the difference between the ABA and the 2e?

[peedman]

Well for one the intake is on the opposite side of the exhaust. I think its referred to as a tall block i.e. 159mm stroke (same as abf) but i could be wrong.