The mk3 1.9L TD power-quest

[mollins]

I would have looked at buying that one in (QLD?) that was for sale, except, I already have 3 cars. bugger.

The one in qld is TDI (has a 1Z). Nice car, but they want a lot for it.

Cheers

Mike

[evorobin]

My favourate mk3 without doubt. Nice subtle mods with a cracking power plant!

[jayjay]

My favourate mk3 without doubt. Nice subtle mods with a cracking power plant!

i think you mean torque plant?

definitely one of my favourite mk3s on here too.

[Preen59]

i think you mean torque plant?

definitely one of my favourite mk3s on here too.

I've driven it... TWICE!

[gldgti]

ahh shux its nice of you guys to compliment her so....

it does drive really nicely, but its no powerhouse.... well maybe i'm just feeling annoyed because the turbo's letting me down AGAIN!

i just want to put the t3 in... but uni.... uni.. uni...

[jayjay]

lol. it must be the fastest pre 95 diesel car kicking around aus.

jealous preen

what are the specs for the t3 turbo compared to the current one?

[gldgti]

the t3 is a genuine vw-variant turbo made for hte early 1.6TD's -

i just measured it up and did some calcs:

The compressor side works out at 36 Trim, and the exhaust at 68 trim. the exhaust A/R is .36 . by rough calc, the compressor A/R is about 1.00

Using a T3-40 trim compressor map as a guide (40 trim pretty close to 36) it should be very good for my application. small exhaust a/r will help it spool nice and fast and even though the compressor is only small, tha large a/r should make it efficient through the midrange - i hardly ever rev it past 4000rpm anyway, so it should be great.

if i find that its not playing nice at high rpm, i might be able to swap a larger trim compressor side onto it, but keep the small a/r exhaust side.

for people that are interested in learning:

http://www.junkyardturbos.com/101_1.html - some turbocharger basics

http://www.motorgeek.com/index.php?page=6 - a nifty tool to plot you're running conditions on a few turbine maps

[gldgti]

and another article for those of you interested in learning about and improving your diesel...

http://www.myturbodiesel.com/1000q/turbocharging.htm#turboexhaust

[mollins]

lol. it must be the fastest pre 95 diesel car kicking around aus.

not for long.. muahahaha..

[Preen59]

not for long.. muahahaha..

Hahaha nice one! I hope to do something similar to what you're doing one day...

[gldgti]

check back to my 2 previous posts for updated info btw - some useful links there for people to look at.

[peedman]

Updates bro? Ive just bought myself a diesel likes urs and seeking inspiration

[gldgti]

hmm well i suppose i should update for new IC. not a lot of room to work with at all considering the HUGE a/c core, and the bumper support panel,
so it became necessary to cut up the bumper support panel instead,
taking out most of the support panel in between the foglight positions and the leave the top 'u' channel shape for building on to. then i added some support for the IC and reinforcing for the support panel to stiffen it up, since i just chopped a hunk out of it. reinforcing is 50x3mm flat bar stitch welded along the back (radiator) side and supported in the middle at the front with the leftover tab from before. look here for details:

http://www.vwwatercooled.org.au/newforum/upload/showthread.php?t=24787

the idea was to basically cut out as much bumper support as i needed, then make it nice and strong again so that it was still stiff from the frontal impact perspective. remember that aluminium is a very stiff metal and adding the intercooler, as long as it is relatively well supported (i.e. properly attached to the bumper support) means that the IC itself will act as a bumper support in an accident.

i put the hoses wherever they would fit really, which is through the holes where the stock fog-lights project backwards through the radiator support. i left the standard intake configuration for now, so that if i happen to have a problem on the road i can swap on the old intake hose with no trouble.



here's what it looks like from the outside. the front view makes it look like it'll get no airflow, but i can assure you that from the last 3 weeks of driving its working VERY well indeed. i have seen an across the board 10% improvement in fuel economy, and last week recorded my best ever range from a tank figure of 922.5km, on 100% biodiesel. the l/100km figure of 5.72 doesn't do it justice, as i filled it to brimming after that long tank, whereas the time before i just filled it to the first click... so in fact it must have been better.

torque is up on before from 2000-3500rpm, i think that the little k-14 is really the limiting factor now, and i STILL havn't got myself into gear to rebuild the T3... but i will, i promise! i've been waiting to some extent because i really needed to do some maintenance and repair work on the car, such as a new alternator /ac bracket and tensioner, and i needed to get the air con fixed too (a BIG investment!).

now thats past i'm happy to be getting on with other things.

[gldgti]

time for a little update.

well, over the weekend i went on holidays and achieved my best consumption so far of 5.2l/100km, of 100% biodiesel on my 15yo diesel. (from a whole tank)... so given i'm now topping 23psi! and and the car is running well, i guess i'm doing somethign right!

i had an issue with my intercooler pipes that run down infron of the accessory belt rubbing through a silicone 90- bend i have there (oops) and so have adjusted the piping so that it cant ever happen again.

i've also tuned the fuelling just a little more, adding a bit more across the rev range so as to up the boost and get me some more horsepower. i've realised that i need to get it nice and hot first, before i go testing out if i'm smoking or not, because at anything less than 15minutes of proper driving, its just not hot enough.

sighting this, new injector tips are on the board - i'll be upsizing and hoping to get a bit more hp out of her, perhaps a smoke reduction too.

the other day, some guy in a mk5 gti gave me a run at the lights (rolling start and we didnt speed) and i kept up - so i'm gonna chalk that up as a testament to old diesels tunability - if i can keep up with a mk5 gti, i reckon i'm doing well.

finally sorted my clutch problems, and no more slippage, which is nice - but further, i've been into the engine to check out the main bearings and am happy to report that despite my driving and the amount of boost i'm running through her, the crank bearings show little sign of wear, even for 200,000km. definately the original bearings too. so all good things to report.

i'm toying with swapping out hte intercooler for a larger one (just because i can) and i have a little plan up my sleeve for a couple more suspension mods - stay tuned

[Jarred]

woo!

glad to hear it's all still working, and quite well at that!