Turbo type4 fastback:)

This is the place to discuss, or get help with any of your Type 4 questions.

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peumansjoris
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Post by peumansjoris » Sun Nov 20, 2005 5:15 pm

Ofcourse, stupid from me. I still have to learn those tricks :oops:

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jonas_linder
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Post by jonas_linder » Sun Nov 20, 2005 5:21 pm

peumansjoris wrote:Ofcourse, stupid from me. I still have to learn those tricks :oops:
you can't learn if you don't ask questions ;)

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jonas n
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Post by jonas n » Tue Nov 22, 2005 2:21 pm

Yes! I indexed them with an 8mm drillbit,then set the angle and switched to a bigger one;) really simple!

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jonas n
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Post by jonas n » Thu Nov 24, 2005 4:06 pm

today i picked up my heads that my friend has done some welding on :D the headgasket always broke at the top but now it should be strong enought! by the way im going without gasket now...
Image
Will this affect the cooling too mutch...hmmm
Last edited by jonas n on Tue May 30, 2006 4:46 pm, edited 1 time in total.

peumansjoris
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Post by peumansjoris » Thu Nov 24, 2005 4:28 pm

Hi Jonas N
What's the relation between the "broken gasket" and this "welding" ? Did the gasket brake because the head was not strong enough on top ?
Regards
Joris

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jonas n
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Post by jonas n » Thu Nov 24, 2005 4:39 pm

the gasket always broke on the spot right in the middle of the headbolts,the head is too weak at this point and looses compression at high boost! but not anymore :)

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Wesayso
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Post by Wesayso » Thu Nov 24, 2005 4:57 pm

jonas n wrote: will this affect the cooling too mutch....hmmm...
You can always go back to your welder and try this:
Image

That's how Klaus, http://www.klaus-kaefertuning.de/ does it to make it stronger. That should help with cooling and serve its purpose :wink: .

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jonas n
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Post by jonas n » Thu Nov 24, 2005 5:05 pm

Coool! thats just so smart! and simple:)

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jonas_linder
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Post by jonas_linder » Thu Nov 24, 2005 5:29 pm

ahh, looks great :)

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Sandeep
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Post by Sandeep » Fri Nov 25, 2005 3:17 pm

Is the goal of the welding to "extend" the fin in this area and that is what makes the head stronger in this spot ? Or is it something else ?

Thanks

Sandeep

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jonas n
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Post by jonas n » Fri Nov 25, 2005 4:26 pm

The thing is just to fill up with weld between the coolingfins to make this part stronger :wink:

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Wally
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Post by Wally » Sat Nov 26, 2005 10:55 am

And the reason you want to make it stronger in that area is because all type 4 heads that leaked that I have seen, had warped (sp?) in that plane.
Reason as I see it is that the head stud pattern of the type 4 is too big in the 'horizontal' plane versus the vertical plane.
Vertical distance of head studs is appr. 78mm (top of my head) and the horizontal distance is 94 (or there abouts), where the outer lower head studs are even further apart by 6 more mm!!

Thats why they start to leak first at the bottom (also because of more heat there, because of less cooling) and then at the top.
Tightening the heads too much will speed up the process of 'curving' the head over the cylinder. The head warps over the cylinder in the horizontal plane...

I hope I have described it in a way that it is understandable (?)
T4T: Type 4 Turbo engine, under construction

Steve Arndt
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Post by Steve Arndt » Sat Nov 26, 2005 11:34 am

My Power Tuning Parts 6 stud heads are welded there too.

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jonas n
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Post by jonas n » Sat Feb 11, 2006 5:14 pm

Hi guys!
It´s been a while since i updated my tread... The car has been teared apart for some updates,the rear "subframe" has been mounted solid and the tranny is beeing put together again.. i also has welded alot of rust.... I´ll try to put up some pics when i get a descent computer running again;)
/Jonas :wink:

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gaston
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Post by gaston » Sun Feb 19, 2006 7:42 am

Hej.

Have you done some special things with the gear box. I ever thougt that 200 Nm is the limitation for the 091 gear box.

cu
Oliver

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