Polo 4.2 V8 Transplant

[GTI's]

Got to have a look at the Super polo today    Really amazing build to fit that in there!
And nicely done too.
And Lee has the biggest shed in vask! It's HUGE!
Looking forward to seeing this in action!

[gtimanik]

WOOW. I neva thought 1 would fit

[Lee]

Well I drove it today----

First impressions are as expected.

Yes it's front heavy but doesn't feel any worse than when the car had the 1.8t

It's very smooth and quiet  and although it's not tuned properly it accelerates ok

A few issues of course;;

The clutch slave cyl is not  disengaging properly so I have a problem

Does anyone know if the slave on the gearbox is different between the O2J box and the O2A VR6 box

Is it possible that the slave just doesn't have the travel to disengage

Would appreciate your advice

Apart from a few oil leaks and the winwood calipers hitting the rims under braking- all OK

Still work in progress
 
 

[SOFTLAD]

That's a great result for first time out, congrats Lee,

[qta4]

Interesting question Lee, just look at what you are using and what is different from factory.

You have Audi A8 engine, Vw Polo master cylinder and Vr6 gearbox, with Vr6 slave cylinder.


Your Audi A8 clutch has a clutch length, the VR6 has also a stroke, and the Polo master cylinder can push so much.

So which part is the miss match?

I personally doubt the slave cylinder is the problem, so the OEM Polo master cylinder is probably the problem.

With my car, i had a std Mk1 golf and a 02A gearbox, using a mechanical clutch assy.

I found that the stroke of the std Mk1 system stroked 80mm and the 02A gearbox is 50mm, so i used a reduction stroke ratio to overcome the problem.

So, i am guessing that the problem probably is with your clutch master cylinder assy.

[80 Vert]

I would second that if indeed you are using Polo clutch master.

[Lee]

No the polo has a mechanical clutch cable.

I used a hydraulic master off a golf 1.8t

It worked with the turbo motor and I haven't changed anything other than the Vr6 clutch

It worked with the dual mass clutch of the turbo

Just wondered if the gearbox's were different??

[qta4]

No the polo has a mechanical clutch cable.

I used a hydraulic master off a golf 1.8t

Bit of a conflict here?

[BB]

So you cant get it into gear?  I would try a few starts with it in gear and foot on clutch. If it starts and isnt trying to drive forward to hard it may just be a bit of wearing in to do.

[Lee]

BB -You were right on the money!!

Did as you said and Yes it's good

Thanks!

[Lee]

Cars arunning!!

Still curing oil leaks and other teething problems but it drives OK

However because of the small size of the radiator due to space constraints,
I need to put on 2 more small cooling fans. Unfortunately the body work below the bumper doesn't give me enough room.

Jamie at Platinum tells me that the 1999 Polo has a one piece bumper/spoiler that may do the trick.

Does anyone have a secondhand one I can try?? Condition immaterial

Cheers

[BB]

Try using water and water wetter only with no glycol.

[Lee]

Excuse my ignorance   --never heard of of it--What is it?

[Simon MkII]

Not being a dick or anything, but a google search would probably answer 90% of the questions asked on VASK 

http://www.google.co.nz/search?q=water+wetter&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a

[80 Vert]

Don't know what type of driving you have done so far Lee but once you can just sit in traffic on a hot day and it doesn't overheat thats when the cooling system is sorted.

I doubt water wetter will be the complete answer to your problem, bigger radiator and/or more cooling fans will be the ticket I'd say.
How about a larger tank? more coolant in the system will also help but a bigger rad will be the most effective.