What about 1602 74x83mm 40 hp?

[thomas.]

I used the copper rings from a new box of good quality gaskits from WW in my 40hp 1385 bb.I didn't have any trouble with sealing & I use the stale air heater boxes with no smell or emissions. I switched the heads to the late '65 40hp heads.

[earthquake]

If the sealing rings are solid copper heat them with a torch until they are a dull red to anneal them, then they should work.

eQ
_________________
74 CLASS 11 LOOK-A-LIKE
69 DUNE BUGGY
79 INTERNATIONAL SCOUT II
05 SCION XB SERIES RELEASE 2[#437]
95 Chevy C3500 dually
98 Ford E150
Kelly J. Nolte 3/20/53 - 11/6/08
http://www.rememberingkelly.com/

DEATH TO CHINGERS!
[From a military recruitment poster in the novel "The Stainless Steel Rat" By Harry Harrison]

[Busted-bolt]

I used 40 hp rods that had about .020" milled from each side of the big end . The stock 40 hp cylinder holes on the block and cylinder heads remain stock size as a factory 40 hp . I just have a set of slip in 40 hp big bore jugs in there as well . I need to find those copper stale air rings for the cylinder head to barrel seal . The aftermarket ones are junk because they are to hard and will not allow the cylinder to seat in the head correctly . When all of the mock-up is done on the prototype parts the top end will be removed , cleaned thoroughly , reassembled and adjusted . I just need to source some O-G stale air 40 hp head to cylinder rings ! 👍
_________________
Vw collection 60 combi ,61 panel ,62 deluxe micro,82 diesel Westfalia,88 Vanagon synchro,98 Jetta tdi,11 Jetta tdi mt ,11 Jetta tdi dsg.
I do all my own work,body,engine and transmission.

[earthquake]

I thought when you built a 1602 on a 40hp you used 36hp rods that are profiled machined on the big end of the rod so it would work on the 1600 based crank, this way you would still have 20mm pin bores to fit the 83mm BB pistons.

eQ
_________________
74 CLASS 11 LOOK-A-LIKE
69 DUNE BUGGY
79 INTERNATIONAL SCOUT II
05 SCION XB SERIES RELEASE 2[#437]
95 Chevy C3500 dually
98 Ford E150
Kelly J. Nolte 3/20/53 - 11/6/08
http://www.rememberingkelly.com/

DEATH TO CHINGERS!
[From a military recruitment poster in the novel "The Stainless Steel Rat" By Harry Harrison]

[henry roberts]

Is that twin turbo?!?

So Frankenstein and so much custom fabrication! I love it!

[Busted-bolt]

You can be rest assured I'm using the 40 Hp upper tin when I'm stale air all the way ! 🙃
_________________
Vw collection 60 combi ,61 panel ,62 deluxe micro,82 diesel Westfalia,88 Vanagon synchro,98 Jetta tdi,11 Jetta tdi mt ,11 Jetta tdi dsg.
I do all my own work,body,engine and transmission.

[Busted-bolt]

The big bore 83 mm piston's were modified to be semi hemi just like the heads . I did use a .075" shim for the barrels to get my desired compression ratio .
_________________
Vw collection 60 combi ,61 panel ,62 deluxe micro,82 diesel Westfalia,88 Vanagon synchro,98 Jetta tdi,11 Jetta tdi mt ,11 Jetta tdi dsg.
I do all my own work,body,engine and transmission.

[Alstrup]

I don´t see the point, - except for the "challenge" If you go 69 or 74 stroke even with the stock 1200 rods and pistons, the stock 1200 tin doesnt fit anyway. If you go with 1300 sgl port heads, the tin needs to be altered too. 13/1500 tin is easily adaptable of course.
There are H beam rods on the market already which fits the 1200 "40" hp crank, for those who absolutely want that.
_________________
https://www.thesamba.com/vw/forum/viewtopic.php?t=435993

[Bub]

[Busted-bolt]

I guess this belongs here . My 1602 . It's almost done ! Lol

_________________
Vw collection 60 combi ,61 panel ,62 deluxe micro,82 diesel Westfalia,88 Vanagon synchro,98 Jetta tdi,11 Jetta tdi mt ,11 Jetta tdi dsg.
I do all my own work,body,engine and transmission.

[fl59bug]

[Rome]

fl59, my guess is that gregson has a set of European-market 1300 dual-port heads that started as of the 1971 model year on Beetles. Such engines were market-specific alternatives to the 1600 DP due to engine displacement taxing, insurance classifications, etc. Never officially sold here in the USA, but heads made their way over sometimes in batch used engines shipped from Europe by large engine rebuilders in the '80's and '90's. Those 1300 DP have the same, smaller cylinder opening to fit 40 hp big bore (BB) cylinders without any machining. I'd imagine that rebuildable DP 1300 heads are plentiful and cheap in England.

So with the BB 40 hp cylinders fitting right into those heads, any DP intake manifold would also be a bolt-on. On his engine he has DP Kadron manifolds. The only modification might be to shorten the carb linkage cross-bar because the 40 hp engine is narrower than a 1300 and later.

[fl59bug]

[Rome]

[TomSimon]

[fl59bug]

[fl59bug]

[TomSimon]

[Busted-bolt]

Oh yeah Gregson1 What are those manifolds you used on the dual kadron K/G? They are pretty sweet! And yeah I'm using a 7140 counter weighted crank in my build with AA 83 mm big bore P/C . The skirts were counter cut to clear only on the pin side leaving the "tilt" side of skirt intact.I did however run in to problems on the #3 case land and it had to be filled for proper clearance of the skirts.I did not run in to any problems with the crank to piston clearence how ever. I debated on going a smaller bore stock 40 hp P/C s but the tilting part of the skirt was much longer than the more modern AA 83s that I had and it would have affected the strength of the piston when used with a 74mm crank.
_________________
Vw collection 60 combi ,61 panel ,62 deluxe micro,82 diesel Westfalia,88 Vanagon synchro,98 Jetta tdi,11 Jetta tdi mt ,11 Jetta tdi dsg.
I do all my own work,body,engine and transmission.

[Busted-bolt]

Im deep in to my next build 83x74 in a forty horse with no shims. A stock manifold will work. I'm going for what the engineers who worked for Lycoming and Continental were working toward. The valves were rather small compared to displacement and the carburetor on a Lycoming O-540 is smaller than an early rabbit 1.5L.. By the way that 540 was 540 cubic inches,so my engine being intended for use in a bus should be perfect!
_________________
Vw collection 60 combi ,61 panel ,62 deluxe micro,82 diesel Westfalia,88 Vanagon synchro,98 Jetta tdi,11 Jetta tdi mt ,11 Jetta tdi dsg.
I do all my own work,body,engine and transmission.