85.5 Stroker Pistons???

[pyrOman]

Alright, I did not bother to search!

I'm working with what I got, a stroker 78 crank in a clearanced case but stock bored. Are there anywhere some stroker 85.5 jugs or even 87s?????
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http://vwparts.aircooled.net/STROKER-Piston-Cylinder-Set-85-5mm-x-82mm-Cast-p/85.5x82cc.htm

[Teeroy]

gkeeton Beat me to it, they are on sale now too!
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[bugguy1967]

The barrels need modification to clear the throws of the crank.

[modok]

Being 34mm pin height, they are perfect for 80 stroke.
78 stroke, you will need longer rods or deck the case to get the deck height in normal limits.

[Alstrup]

[pyrOman]

Great feedback, thanks!

However, this concerns me:

[AlteWagen]

The set I had in my hands weighed a TON but this was 4 years ago.
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[vwracerdave]

[pyrOman]

Kool!

I did get a quick response from them assuring me that the case does not need machining!


Been waiting for a while to not just find these but coming up with the extra $$ for them. Just ordered them yesterday!
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[pyrOman]

Got the jugs on the weekend!!!

Wow! Just 4 days! Anyway, was back from camping early enough to do a preliminary fit and did have to grind a tiny bit on the bottom of the cylinders to clear the rod nuts, less than a quarter of an inch. Needing to dig out the heads and pushrod tubes and the process of seals and torqueing it all taking longer than the time I had, decided to stop there. However, I expected the need to shim the cylinders but, though the pistons clear the crank, they have way too much deck height!?!

Did not have the rings installed when I measured the deck height but still, 0.095" seem like too much! Last thing I did was install the rings but did not have time to recheck the height. Will do that later this week and take some pix too.
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[GTV]

[mark tucker]

yes thats too much, thus the 5.5 rod or cut the case ...not my first thing to do, but some cases need it any way so it's a good way to go on those. or shorten the cylinders. also when you clearance for the rod nuts be sure they have enough rood for some missaliginement uppon assy....and going into other holes.. and the position of the crank(pushed back to the thrust bearing good), and the piston on the rod when checking..many maistakes are made clearancing....and spelling.

[pyrOman]

Okay, thanks all for the feedback/info!

Finally did get it all together and fired up! Got the the stroker pistons and also went with the 5.5" rods which went to zero deck, 0.040" shims took care of that. Stock dual port heads pulled from a dead motor but looking almost like new, a "special bus grind" cam which I have yet to measure, and fed by a Holley (by Weber) progressive carb which was running fine on the Bug's 1600. Also running a 009 distributor on points. Had a hard time getting it to idle and has an intermittent "miss". Took off the carb, blew off all ports and jets, replaced the used plugs with another set of used plugs and at least got it to idle, tough rough. After some tweeking, installed it in the Bug.

It was too late for a test drive but drove it to work today and it ran well. Still with a bit of a miss and does need quite some time to warm up before idle sets. The bottom end was put together with used parts from my pile and of course the oil pressure drops after it warms up. Now, the reason I put this one together was as a spare motor to keep the Bug running while I rebuild its 1600. I do have another 76 or 78 crank which I may use on that rebuild if this set up works out.

Anyway, will prolly do a tune up, swap distributors, adjust, ect. to see if I can make it run/idle smoothly but so far so good.
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[vwracerdave]

[pyrOman]

[mark tucker]

fire it up for a few seconds(20) and turn it off then feal the header pipes carfuly to find the cool one ans that will tell you where to be looking for an issue.

[pyrOman]

FWIW, I did check temps while on the test stand. Though there was difference between them at the pipes, the head temps just at the port exits were within 20 or so degrees from each other. Once I got it to idle and run for a while, I threw it into the Bug. That was pretty much all the time I had to deal with it last night and even with its issues it took me to work (13 miles) just fine with plenty of power, though I didn't "push it" all the way. Work in progress. At least it isn't leaking oil... yet!
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[mark tucker]

look for vacume leeks...like dirty stripes on the carpet .there are a few things that can cause your issue. but I dont mess with the hollywebbler progressive stuff.

[pyrOman]

Update: Been running the little stroker on the Bug and it does have great power! Having issues with idling when cold but it most likely has to do with the old carb. Aside from that, cruising at say 70-75 mph and stomping on the pedal, it jumps very quickly to 85!!! It likes it and so do I!!!

I have to take apart the Dormy's engine before Havafew in a couple of weeks. I think I should take this little stroker, put the Dellortos on it and install it in the Dormy just to see how it does!
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