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-   -   Mythbuster: continuing project thread of my 1303 '75 (https://www.germanlook.net/forums/showthread.php?t=9953)

Wally November 16th 2013 17:15

A hint of some of the parts that came in today :D

http://i174.photobucket.com/albums/w...5.jpg~original

spannermanager November 16th 2013 17:22

finer thread pitch= more clamping force= use less torque for same clamping force.

judgie November 18th 2013 05:48

mmmmmmmmmmm pauter, engine jewelery at its best.

70Turbobug November 18th 2013 13:13

My guess this one is going to be quite a bit more aggressive? Will you be using the same Borg Warner twin scroll or are you going with a complete new set up?

Wally November 19th 2013 14:13

Quote:

Originally Posted by 70Turbobug (Post 87584)
My guess this one is going to be quite a bit more aggressive? Will you be using the same Borg Warner twin scroll or are you going with a complete new set up?

Good guess! :D

Yes, I will use the same twin scroll 'small' Borg turbo I still have left from the old engine.
The new engine will also be equipped with these newly developed billet heads from Thorsten Pieper. Should be done before years end :D


http://i174.photobucket.com/albums/w...ps37f1c656.jpg

http://i174.photobucket.com/albums/w...ps9a049f5d.jpg

70Turbobug November 20th 2013 06:57

I have heard from Thorsten's T4 head project a couple of months ago, but didn't want to spill the beans. :D It is top quality for sure just like the oxyboxer heads. I would think 500-550hp with the same reliability as your previous engine is really possible.

volkdent November 20th 2013 14:35

Drool....:lmao:

Jason

effvee November 20th 2013 22:55

Quote:

Originally Posted by Wally (Post 87577)
A hint of some of the parts that came in today :D

http://i174.photobucket.com/albums/w...5.jpg~original

Congrats Walter.

Hay,I was looking at Pauters website,I noticed that he's making his rockers without needle bearings or bushings for shaft support; just aluminium rockers to shaft. I wonder why he has not stated why. This is a sharp turn from needle bearings, bushings, to nothing:eek:

What is your choice for rods?
How about cooling system, upright?
Nice work Walter:)

Wally November 21st 2013 05:40

Quote:

Originally Posted by effvee (Post 87601)
Hay,I was looking at Pauters website,I noticed that he's making his rockers without needle bearings or bushings for shaft support; just aluminium rockers to shaft.

They are not without bushings and not 'just aluminium rockers to shaft' as you stated. What gave you that idea?

http://i174.photobucket.com/albums/w...b.jpg~original

I already have the rods, they were a test set from R&R through Jake. Here coupled to a set of 77,50m pistons from the 1200T project (testfit for the 20mm pins):
http://i174.photobucket.com/albums/w...a.jpg~original

effvee November 21st 2013 07:40

Quote:

Originally Posted by Wally (Post 87604)
They are not without bushings and not 'just aluminium rockers to shaft' as you stated. What gave you that idea?

http://i174.photobucket.com/albums/w...b.jpg~original

I already have the rods, they were a test set from R&R through Jake. Here coupled to a set of 77,50m pistons from the 1200T project (testfit for the 20mm pins):
http://i174.photobucket.com/albums/w...a.jpg~original

Good morning Walter, sorry I mis read pauters web site, only the rockers using needle bearings, will not have any bushing just hardened aluminum.

Those rods look plenty strong enough.

70Turbobug November 21st 2013 07:50

Nice parts! What cylinders will you be using? Interesting that you chose to go to a 98mm bore, I would have thought that the heads were made for a minimum 100mm bore. I can understand wanting to minimize knock but 98 is somewhat exotic, hence the question on what cylinders you will use. It's good to see you back, always loved your projects and inspirates me to keep miy project going!

Wally November 21st 2013 09:02

The yet-to-be-determined bore (98 or 100) is still up in the air, but best chance is indeed 98mm. Knock threshold isn't a consideration on that aspect, trust me. I am not convinced bore has that high a correlation with knock in our application anyways.
If it turns out to become 98mm bore, I'll tell the story behind why lateron ;)

70Turbobug November 21st 2013 11:08

Quote:

Knock threshold isn't a consideration on that aspect, trust me.I am not convinced bore has that high a correlation with knock in our application anyways.
I have the same opinion on that! There are so many other factors that cause knock that you canīt just pin point it on a large bore. An engine knocks in the low rpm range,so imho usually a poor head porting/cam combo and/or tuning will be the cause.Performance wise,I donīt think 2mm more or less bore will matter anyway.;)

Wally November 21st 2013 11:16

Quote:

Originally Posted by 70Turbobug (Post 87609)
Performance wise,I donīt think 2mm more or less bore will matter anyway.;)

My thoughts exactly. The 100cc difference of the 2mm bore will make only a very small difference in spool, so the better/stronger cylinder (and costs) will play a more important role ;)

Wally December 24th 2013 05:16

The new bare T4 billet heads are here! :D


http://i174.photobucket.com/albums/w...psf9a356f8.jpg

http://i174.photobucket.com/albums/w...ps0cd6eaf4.jpg


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