2.0ltr 8v Turbo Conversion

[sonofsam 5]

Computer says .... Yes.

 

Here's the other cam I mentioned talked about.

[whizzer71 0]

Well...Luck would have it the engine that we removed from my mates car about 3 years ago was a 1.9 Cat engine,That was removed to make way for an Mi which went Bang in a big way about a year and half later it then got a Gti6 engine BEST THING THAT EVER HAPPEND,Has been an absolute peach ever since completely bullet proof !

 

Well getting back to the subject in hand,The said 1.9 Cat engine has sat in his shed ever since so I know whats gonna happen to it now !

[inferno 1]

1FM's have the right cam

[johnrobertgordon 0]

err no

i'm with bales here, the standard turbo is far too small to be running anywhere near that pressure reliably.

 

 

Errr yes, get your fact's right before Errrr'ing me young man!

 

It has been proved that they will run happily at 1.2 bar. As I am sure someone else on here can confirm, i just hope he reads the thread!

[Discostu 6]

Check out the Activa forum, plenty of people on there happily runing around a bar of boost

 

Mikey G (on this forum) has been running 0.9bar in his for a few months now with no problems. i agree tho that replacing the turbo and manifild will probably be my first mods to more power

 

But then how much power can a standard bottom end take before the need to replace pistons and rods?

[tom_m 0]

But then how much power can a standard bottom end take before the need to replace pistons and rods?

 

theres's a 300 horse one in holland iirc

[Hilgie 16 2 Cars]

A good (new) standard T25 turbo unit will do 1.2bar, but it gets out of puff beyond that. Old and worn units will probably stick at 0.9-1 bar of boost tops.

 

Standard engine internals can do a reliable 300bhp.

http://www.205gti.com/racemonsters/racemon...cer2/index3.htm

 

And the little cam sheet:

[TEKNOPUG 3]

Well getting back to the subject in hand,The said 1.9 Cat engine has sat in his shed ever since so I know whats gonna happen to it now !

 

It's the perfect engine to turbocharge: it has the right cam and it's already low comp.

[Henry Yorke 269 3 Cars]

Looking at Hilgies table, I can see 0.3mm difference in exhaust lift between a cat and a non cat. How much difference does this actually make in the real world?

 

Also the duration is surely more important than the lift on a turbo engine to stop your boost seeping off in the wrong direction?

 

For the DFZ 1.9 cat 105 bhp engine (from Petert):

 

The 105 hp cam duration is 218 deg. @ 0.050" and 0.405" lift on both exhaust and inlet. It's a very tame cam, designed to keep cranking pressures high with the low 8.4:1 CR. The JAZ engine has 0.445" lift on the inlet and a bit less on the exhaust. It has more duration than the other cam, but less than the 130hp cam. I can't recall all the numbers.

[Hilgie 16 2 Cars]

DKZ vs 2.0T cam:

inlet lift: 11 vs 10.5 = 0.5mm difference

exhaust lift 11 vs 9.35 = 1.65mm difference (!!!!)

 

As you say, duration is very important and that's why the 130bhp cam does not work...duration is too long, so it has some overlap (exhaust valves still open when inlet valves start to open, boost seeping away through exhaust).

[whizzer71 0]

Anyone got any RR Graphs of their modded Turbo 205's/309's using this engine with specs of turbo's fitted etc...just be nice to know what I can expect to achieve in the way of torque with various turbo/manifold combinations

 

Tristan

[whizzer71 0]

It's the perfect engine to turbocharge: it has the right cam and it's already low comp.

 

DFZ OR DKZ ?,I Think its a DKZ as it had the Motronic 1.3 Management

Edited May 12, 2007 by whizzer71

[TEKNOPUG 3]

The DKZ one I think. Anyway, definitely the CAT one from the later GTi as it has low compression and the more suitable cam. Also, the Motronic management can be re-chipped to allow for the turbo.

[van cleef 0]

So the DKZ is the way to go sounds like it would be hard to get your hands on one.

 

Is there any after market one would be suitable or has the same profiles as the DKZ or better.

 

It's just a thought before i start doing my engine change.

[Hilgie 16 2 Cars]

The DKZ was in a lot of other cars, mostly BXs en ZXs.

[tom_m 0]

Is there any after market one would be suitable or has the same profiles as the DKZ or better.

 

cat cams do a cam for the 8v turbo, which has way more lift than any of the cams listed above, but being a cat cam you do have to pay a bit for it!

[whizzer71 0]

So whats gonna be the best turbo for me to go for ?,Trying to do it all on much as budget as I can ,Anything that i might be able to obtain fairly reasonably...possibly from a breakers or maybe on e-bay ?

 

 

Tristan

[whizzer71 0]

Ive chosen to go top mount T3 turbo to get a bit more power out of it though

 

 

What cars have The T3 turbo as std equip or is it an uprated unit that you buy aftermarket ?

 

Edited May 13, 2007 by whizzer71

[bales 1]

T3 turbo's come on loads of things, T3 is just the frame size so you can have loads of combinations of compressors and turbines. For example sierra cossies came on a T3 as did RS turbo's but they are different sizes.

 

Also be careful if you are buying one off car as they may have the wastegate built into the exhaust housing/elbow which will be specific fitment to that car, T3's of escorts are like this. If that is the case it is a bit of a hassle as you either have to buy a flange to convert it to internally wastegated, or an external wastegate which can be expensive.

 

Probably a T28 or T25 off 200sx, sunny gtir's are a better bet.

 

To be completely honest though you sound like you are in the exact position I was last year when I was looking to get a turbo engine anf thinking about all the tuning possibilities. I would say exactly what lots of people said to me and that is to get the engine in standard and get it running properly before you decide you want more power. I always wanted 220bhp and now I am really not sure whether it is worth it.

 

I think it is the fact that the xu10cjte "only" has 150bhp that puts you off a bit but it is the torque that really makes them fly. They are 173lb/ft standard and by the time you have a decent exhaust/induction path, no cat.....etc they are probably more around 180ish. That in 800ish kg really does make for a quick car, my car now honestly pulls harder in 4th when on boost than it did in 2nd gear before with a standard 1.9gti. It really is bloody torquey.

 

Plus you will be suprised how many little things you need to spend on to get it running so it soon adds up before you add any tuning parts to the conversion. So I really would say to get a standard one and drive it before you spend £'s on a bigger turbo and manifolds etc...as it may well be less fun to drive.

 

Alex

[whizzer71 0]

Thanks for the informative reply Alex,I have already done one Turbo conversion using an engine from a Xantia Activa,Although its quick and has bags of torque, I think that its not as much fun as my Gti6 205,Im gonna be doing this next one for my mate who currently has A gti6'd 205 with cams and fancies a 205 turbo also.

We already have a 406 2.0ltr turbo that we are gonna butcher for its engine etc,we also have a nice emerald injection ecu (m3d I think) and a 1.9 cat engine that we are gonna rob the cam from, so really we are trying to work out the best and most economical way of installing it all and getting the most out of it.

Gonna run this one on a 306D turbo gearbox with an lsd also so hopefully that'll keep it all reasonably under control !

Any other info/advice you can offer would be really great tho ! hoping to build an absolute monster....and lets face it you cant beat the lovely sound of a turbo !

Hopefully this thread will get all the info/answers in one place and make it easier for people wishing to do turbo conversions in the future !

 

Edited May 13, 2007 by whizzer71

[bales 1]

Fair play if you have done one before and have already driven them, as I say I only had a standard 1.9 before so is a bit more of jump in performance compared to a gti6 205 (which is probably a bit quicker in a straight line than a standard turbo)

 

Well if it is like that then it has to be DP love collector 2 and a GT28rs

[whizzer71 0]

Yeah I think thats prob the way I'd go but Dont think he's gonna be able to stretch to that kind of cash,Think we'll prob end up getting a 200SX or Sunny/Pulsar Gtir turbo and mount it on a TT manifold if thats possible ?

 

Edited May 13, 2007 by whizzer71

[bales 1]

Yeah I think that a TT style manifold which were £225 when I enquired from 205parts, and a T28 would probably be able to see well over 200bhp especially if you already have the emerald managment.

 

I am thinking that is probably the route I will take if I decide to increase the power, running the standard T25 at a bar just doesnt seem particularly worth it to me given how ineffcient it is at those pressures, but I suppose if you just buy a bleed valve and hope that fuelling will keep up then it could be a pretty cheap increase ........ until you melt a piston

[whizzer71 0]

No dont want that to happen,not really into "short cuts" specially if it ends in a major cost faliure,What kind of pressure can you succesfully run a T28 at on one of these engines with std pistons with say a cossie intercooler ,I heard somewhere that you have to fit a different type of map sensor?,If so what can I rob one of these from ??,Or is it something we'll have to buy from a tuning company ?

 

[whizzer71 0]

What about the a Turbo of the 2wd Skyline ?,seen a few of those up for grabs where people are swapping em out for bigger units ?