hello im just interested in turbocharging my 8 vgti engine. what mods and attachments will i need to complete this project?? and where can i get parts from (pref in melbourne area)

dom

nn[ Edited on 3-9-2005 by typ-fre ]

What gearbox are you running? If it's an 020 5spd, don't even bother. At a minimum, you'll need a better clutch, but the 'box won't last long as they're shit. 02A cable box swap is pretty involved and requires new g/box mounts front and rear, shortened hand brake, 100mm drive shafts etc etc.

That said, you may be planning to run a small turbo and low boost (probably a given with stock compression), so the 020 may be ok for a while. They were never intended to handle much torque, though, which is why the the 02A came out with the G60.

Is it a genuine GTI with k-jet injection or just an 1800 on a carb? I wouldn't bother turboing a car that doesn't have EFI anyway, but that's up to you.

There are off the shelf exhaust manifolds available o/s from 8vturbo.com etc. Locally, you'd need one custom made.

Turbo Technics in the UK used to make a 180hp kit for the Mk1 but as far as I know, it's now well and truly out of production. Most people running them ate gearboxes regularly apparently!!

You're far better off dropping in a 2.0 16v with a well ported head and 270ish cams for around 180hp and less torque - that you you can save the gearbox somewhat :blush

hey abf2.016v the box is a 5sp german racing long-ratio box its a k-jet 8v gti engine, and yes i am plannig on de-comressioning the engine to run a stock nissan skyline turbo i have bolted strenthining rails under the engine to stop the car from understeering and twisting, i have the stock clutch in the box although i have a carbon/kevlar clutch sitting at home for this project
do you know any website that has exhaust manifolds for my to purchace because i have not found any
thank you

domnn[ Edited on 5-9-2005 by typ-fre ]

Here's a few:

http://www.rp-motorsport.de/en 

http://www.eiptuning.com 

http://www.8vturbo.com 

http://www.rothe-motorsport.de 

There's tonnes of them...

hey i tried the websites and none of them have off the shelf exhaust manifolds, i already tried EIP tuning with emails n the havnt replied back to me for like 1 month!

dom

There was a mk1 at the nationals running 14's , anyone know who he/she was?

Wouldnt it be better to supercharge? 8V set up badly for heat sink with zorst and intake on same side.... Or get a crossflow 2.0 8V head from a Golf 4.....

im really dont know much about superchargers on a golf, would it be the same as a turbo of not so much powerful??

dom

The intake and exhaust are on the same side of the engine on an 8V which means the air will be hotter going into the engine than it should be on longer hard runs.

Supercharging is common with 8V's. Not the same. Supercharger is belt driven, and because the turbo is not taking up as much room behind the engine, the exhaust is the normal distance from the intake instead of being closer and running hotter. Turbos and S/C's can produce the same power. S/C usually give better low down power with no lag....

Some guy approached me at the nats offering a S/C for an 8V engine....

Should add: try asking on the Club GTI forum - there's a couple of Mk1 GTIs with the Turbo Technics kit.nn[ Edited on 8/9/2005 by ABF2.016V ]

yeahhh thanks mate you have been very helpful

dom

Still reckon S/C is a slightly better option, although with K-Jet, I would imagine it would have problems as well....

I would be getting rid of the K-jetronic , actually I'd be putting in a complete 2l Mk3 motor with simos injection and supercharging that

I gather he's pretty set on turboing his current motor I think we all agree that it's a no go with mechanical injection, though.

There's NO point converting the 1800 to EFI either. By the time you source all the parts, the price will be similar, if not more, than dropping in a complete Mk3 2.0. You needn't change much to do this either. If you supercharge it (and so not be in need of a turbo manifold), you only need to extend your current exhaust manifold 16mm to reach and there are spacer plates available to do it.

In fact a Mk3 2L with just a cam and a few bits goes very well in a MK1, you find that that satisfies you

FARRRR MAN!!!! im getting soooo mixed up now, all of these options to choose!!, now im thinking about the 2lt conversion, considering that it would be shit to run a turbo of a k-jet system, and i really dont want to touch the fuel injection system because its such a reliable engine for me! ok then what dues it take to transplant a 2lt engine in a mk1?? hahaha:party

Mk1 -> Mk3 2.0 in a nutshell:

- Extend exhaust manifold 16mm for tall black
- Cut away lower timing belt cover on the Mk3 motor (so it clears the stupidly placed driver's side engine mount bracket)
- Remove power steering pump (and a/c if fitted), and fit a shorter aux. belt
- Remove the Mk3 inlet, injectors etc etc
- Use your K-jet inlet manifold and injection to run the 2.0.

Or, convert to Digifant and use the supplid Mk3 parts.

It's a laughably easy swap. :P

hmmm and how much is the budget n do we need new engine mounts n stuff
plus i have to get engineers report also!!! arhhhh!!!!!!!!!!!!

dom

Just bolt the Mk1 front and driver's side engine mount brackets onto the Mk3 block and use your existing g'box side and rear mounts.

Use new rubbers if you want (a good idea). You'll need the side mounts machine pressed into place in most cases.

How can I answer how much it'll cost!??! I don't know who you're taking it to, whether they've done it before and will know what they're doing, what parts you'll replace etc etc.

You'll need around $2,000 for a motor. If you pay someone to do it, don't expect much change from $4,000 or even $5k all up. By the time you 'freshen' the motor with a water pump, gaskets, timing belt etc etc, the bill will climb quickly.

There's no point paying someone to do it, though, especially if you're keeping the K-jet, meaning you needn't fiddle with any wiring.

yer all i need is the motor ill do everything elce myself!! sooo round about 2,000 for the engine, then what ever needs to be repaired n tuned in it....... then engineers report sooo just under $4,000???

dom

just to throw a spanner in the works............ i have been told by a few people not to rev the mark 3 2litre hard, as they have a tendency to put a leg out of bed!
if this is true, then turboing or supercharging could be a bad idea on this particular engine.
has anyone else been made aware of this, if its true?

Never heard this. The Vento is driven quite hard with 210 000kms on it, and it is fiiiiine....

vwrallycar to add a little light on the subject....only ever seen one mk3 throw a leg out of bed....when revving a stk engine hard ..say over the 6000rpm you may experience rod bearing hyraulic....this is when the oil can't flow fast enough thru the crank and con rod causing very early bearing wear.. the bearing actually burns which will in the long term result in a knock in the bottom end which will finally cause an electrical problem when the conrod hits the distributor cap !!! mk 3 engines are great keep the oil clean and regular changes...cheers steve

I used to have a Pug 205 1.9 GTi with Turbo Technics conversion in the Uk in 90's - did nothing to the box? - went like stink....I think, at the time they had a Golf version. Not cheap though, I think I paid something like GBP 3500 for it drive in and out.....but I was young and stuuuupid, now old and stuuuuuuuuupid.

bump,

dom