1.9 and 2.1 case differences?

[Mr. Electric Wizard]

I have a 1.9 block that I am wanting to use a a base for a large displacement Oxyboxer.
I am under the impression that the only real difference between a 1.9 case and a 2.1 case is the flywheel bearing size. The 1.9 using a Type 4 bearing and the 2.1 using a .040 Bug bearing.
Are there any other differences.
A 1.9 is what I have now, and I really would like to use it since I already have it.
But I do have a stock 2.1 in my '88 Vanagon (that recently got rebuilt before I bought it), but it might be a while before it craps out.
I'm sure DPR can make me a frankenstein crank that will work.
Is there anything else I am missing?

[Unkl Ian]

I think the 1.9 is first choice, it uses all T4 mains.

[Unkl Ian]

Don't know why VW used completely different bearings for the 2.1 motor.

[Mr. Electric Wizard]

Making it a stronger bottom end.
Ok, so what I'm building:
1.9 case
84mm CW Crank
Type 1 rods
101.6 P/C
Turbo, MS fuel and spark.

[Mr. Electric Wizard]

Based on the stroke I'm wanting I think a 2.1 will work much better.
At least it will make it possible.
The top of the case would be getting super thin with that large of a crank in there I suppose.

[Unkl Ian]

I've read the top of the case has more room than a T1, so it will handle a large stroke.

[Unkl Ian]

I've seen some 2.1 cases in the classifieds on Samba.

[fastback]

U get the 1,9 in both early style bearings and late style bearings.
the early does not have the "B" in the partnumber on the sump.
025 *** *** B

[Unkl Ian]

Late 1.9 bearings are the same as 2.1 ?

[fastback]

yes

[fusername]

I thought 1.9 used all BUG bearings, not T4 bearings, except for a special flywheel bearing... I have tons of 1.9 mains with no use for them, if they fit t4 i would use em, but I thought that was incorrect.

[Unkl Ian]

1.9 case
84mm CW Crank
Type 1 rods
101.6 P/C
Turbo, MS fuel and spark.

Air or water cooled ?

[fastback]

i have heard that using vw journals and 84mm stroke u can run into clearance problem in the case.
but this was not pauter rod's which are beefier in the big end than stock rods

[Jim Andritsakos]

The early 1.9 cases (up to 12/85) uses bug style bearings and one piece thrust bearing they also does not have the front valve drilled.
Later from 1/86-on use chevy style bearings with 3-piece thrust bearing 1.9 & 2.1 same cases.You can use a 80mm crank w/o any clearance required in a wbx case.The very very late cases has a diagonal support rib in the alternator mounting plate area.

[nikos]

The early 1.9 cases (up to 12/85) uses bug style bearings and one piece thrust bearing they also does not have the front valve drilled.
Later from 1/86-on use chevy style bearings with 3-piece thrust bearing 1.9 & 2.1 same cases.You can use a 80mm crank w/o any clearance required in a wbx case.The very very late cases has a diagonal support rib in the alternator mounting plate area.

Hey Jim,

I'm starting a oxy build here in Crete and might need some parts. Pm if you want to chat/help out w/ sourcing some parts...

thanx,

nick