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Wed Nov 17, 2010 1:14 pm

Who know the exact head stud pattern for wbx or autocraft stud pattern?
Are both the same or different?

Thanks for your assist

Wed Nov 17, 2010 11:56 pm

They are both so close that heads are interchangeable. The difference in position of the studs is less than 1mm.

Thu Nov 18, 2010 9:58 am

Thanks for your answer Bruce

My information at the moment are:
wbx pattern: 83x88mm
autocraft: 85x90mm

so i think both pattern are different and as you measured, each stud is approx 1.0mm different

Didi

Fri Nov 19, 2010 1:06 am

didi wildhaber wrote: autocraft: 85x90mm
This isn't accurate. The Autocraft stud pattern is specified in inches, not mm.

Fri Nov 19, 2010 4:47 am

>>>>>This isn't accurate. The Autocraft stud pattern is specified in inches, not mm.

Yes this it possible, it would be to easy one common worldwide unit :-)
Bruce, do you know the exact pattern in inches?

Fri Nov 19, 2010 12:55 pm

You're lucky, I haven't seen the page for years, so I didn't know exactly where it is. But I found it.
The Auto-Craft pattern is 3.484" wide and 3.274" high. This converts to 88.49mm x 83.16mm.

The 6th studs are 2.350" above and below the cylinder's centerline.

Fri Nov 19, 2010 4:01 pm

Bruce wrote: You're lucky, I haven't seen the page for years, so I didn't know exactly where it is. But I found it.
The Auto-Craft pattern is 3.484" wide and 3.274" high. This converts to 88.49mm x 83.16mm.

The 6th studs are 2.350" above and below the cylinder's centerline.

Thanks to find out the exact pattern. Pretty close to the std wbx pattern.
But mine autocraft pattern is realy in the range of 85x90mm.
Udo Becker reported:
...Looks like autocraft has 2 different . WBX is 83x88 , that is from the original VW drawing. I have one 4 inch bore autocraft that has the same and one pair of Autocraft cd heads that has 80x85...

Sat Nov 20, 2010 1:12 pm

didi wildhaber wrote: .... and one pair of Autocraft cd heads that has 80x85...
Again, not in mm with the Americans.

Those heads are for the 96.5mm bore engine case.
The actual numbers are 3.137" H x 3.334" W, or 79.68mm x 84.68mm.

Sun Nov 21, 2010 6:47 am

Bruce wrote: didi wildhaber wrote: .... and one pair of Autocraft cd heads that has 80x85...
Again, not in mm with the Americans.

Those heads are for the 96.5mm bore engine case.
The actual numbers are 3.137" H x 3.334" W, or 79.68mm x 84.68mm.

Thanks again Bruce! i will call you in the future mr. headstudpattern resource....:-) . No, it was realy helpfull for me to bring some light into the different web post about pattern.

Didi

Mon Nov 22, 2010 12:46 pm

Bruce wrote: didi wildhaber wrote: .... and one pair of Autocraft cd heads that has 80x85...
Again, not in mm with the Americans.

The actual numbers are 3.137" H x 3.334" W, or 79.68mm x 84.68mm.

It looks like the americans must get the metric numbers :-)

The actual number you mentioned are the same as the new cd heads have , this is what i messured
So they changed it ?

Udo

Tue Nov 23, 2010 1:47 am

I'm not quite sure what you're asking, Udo.

Auto-Craft makes cases with 2 stud patterns.

One case is called the "96.5" case. Presumably this means the max bore it will accept is their 96.5mm cylinders (with fins). = 79.68mm x 84.68mm

The next is called "101.6 Studpattern". = 88.49mm x 83.16mm.

Tue Nov 23, 2010 11:47 am

Bruce wrote: I'm not quite sure what you're asking, Udo.

Auto-Craft makes cases with 2 stud patterns.

One case is called the "96.5" case. Presumably this means the max bore it will accept is their 96.5mm cylinders (with fins). = 79.68mm x 84.68mm

The next is called "101.6 Studpattern". = 88.49mm x 83.16mm.

Thanks for the info . this is what found out too.

Udo

Tue Nov 23, 2010 12:32 pm

Udo.B. wrote: Bruce wrote: I'm not quite sure what you're asking, Udo.

Auto-Craft makes cases with 2 stud patterns.

One case is called the "96.5" case. Presumably this means the max bore it will accept is their 96.5mm cylinders (with fins). = 79.68mm x 84.68mm

The next is called "101.6 Studpattern". = 88.49mm x 83.16mm.

Thanks for the info . this is what found out too.

Udo

But the question still remain, what is with my 85mm x 90mm (+- 0.2mm tolerance maximum) pattern? It is for sure not an inacurate measurement

Didi

Wed Nov 24, 2010 1:06 am

It might be another bolt pattern.
Here's an idea that will provide interesting info. Measure the spacings of all 4 cylinder holes' stud patterns. Maybe it's just a machining error???

Wed Nov 24, 2010 11:40 am

Bruce wrote: It might be another bolt pattern.
Here's an idea that will provide interesting info. Measure the spacings of all 4 cylinder holes' stud patterns. Maybe it's just a machining error???

just a machining error is good... :shock: i hope not!

good idea, just checked all 4 cyl. pattern: and all have the same 85 x 90 mm pattern

Mon Mar 27, 2017 2:51 pm

didi wildhaber wrote: Bruce wrote: It might be another bolt pattern.
Here's an idea that will provide interesting info. Measure the spacings of all 4 cylinder holes' stud patterns. Maybe it's just a machining error???

just a machining error is good... :shock: i hope not!

good idea, just checked all 4 cyl. pattern: and all have the same 85 x 90 mm pattern

85 x 90 mm is the same like my pauter case set up 😄😄😄