Can you put larger pistons and cylinders in a 36?

Ben Dover

I'm kicking around the idea of building a vintage performance 36er for my 58 euro rag. WW has the Okrassa kit,69.5mm crank,a performance can and the Abarth exhaust, but no mention of ratio rocker's or larger P's and C's. Are these not available?

GTV · Posted: Sat Oct 03, 2015 1:35 pm Post subject:

Not yet.

What ever happened to the 80's that ac.net had falsely advertised? I'm surprised AA hasn't tooled up to make them yet, I would have guessed there is a large enough demand.
_________________
EMPI Power Rules!

pig-pen · Posted: Sat Oct 03, 2015 2:11 pm Post subject:

ratio rockers from speedwell.

http://speedwellusa.com/shop/?slug=product_info&products_id=37
_________________
1954 L227 Type 113
1964 L31 Type 265

Ben Dover · Posted: Sat Oct 03, 2015 2:31 pm Post subject:

That's great news on the ratio rocker's!

Kjell Roar · Posted: Sun Oct 04, 2015 1:58 am Post subject:

It is possible to modify 83mm big bore kit to fit, but you have to cut down cooling fins and machine spacing for the cylinder studs (wider on the 40 hp cylinders). It is threads on how to do it here on the forum.

You also have take up the case and cylinder heads to fit.
_________________
I got a historic car, every scratch got a history...

My car, Aug. 4th, 1955 / an early 56: http://www.thesamba.com/vw/forum/album_page.php?pic_id=610438

Mr. Okrasa · Posted: Mon Oct 05, 2015 12:02 pm Post subject: Big bore 36'er

Modify a set of 912 cyls., bore for 83.50 and use an Okrasa 69.5mm crankshaft gives you: 1522cc's. Install a Porsche 74mm
crankshaft and now you have: 1621cc's! If I remember correctly, the barrel thickness at the head meas. 3.5mm+

Image may have been reduced in size. Click image to view fullscreen.

_________________

See my Instagram: https://www.instagram.com/okrasa/

1959 VW Karmann Ghia Coupe / Bamboo-Green / Denzel 1300cc / OG. owner, paint Wink

Denzel engine running. See this link: https://youtu.be/DgUlsQDTXTE

VW www.Okrasa.com
356 www.PreA356.com

pig-pen · Posted: Mon Oct 05, 2015 12:40 pm Post subject:

or...

80mm cylinders (a much easier fit)

http://aapistons.com/products/vw-80mm-porsche-356-cylinder-kit

and some 80mm pistons from something not vw... they are out there if you look.
_________________
1954 L227 Type 113
1964 L31 Type 265

Low Bräu · Posted: Mon Oct 05, 2015 4:17 pm Post subject:

Where are you guys sourcing the 80 and 83.5 millimeter pistons? Are you having them made? Are they production made pistons from another application? They don't look like custom CP, Wiseco, etc. Thanks.
_________________
Independent German Auto
671 Fern Drive
Merritt Island, FL 32952
(321) 449-4665

Specializing in repair and maintenance for Porsche, BMW, Mini, Audi, and Volkswagen.

1952 Standard Beetle
1960 SO-23 Westfalia
1961 L-380 Turkis Deluxe Beetle
1985 Vanagon Country Homes Camper (work in progress - EG33 swap)

Mr. Okrasa · Posted: Mon Oct 05, 2015 5:32 pm Post subject:

I collected the 83.50mm NOS piston sets way back in the 80's when nobody cared for them. Wink

_________________

See my Instagram: https://www.instagram.com/okrasa/

1959 VW Karmann Ghia Coupe / Bamboo-Green / Denzel 1300cc / OG. owner, paint Wink

Denzel engine running. See this link: https://youtu.be/DgUlsQDTXTE

VW www.Okrasa.com
356 www.PreA356.com

morymob · Posted: Mon Oct 05, 2015 5:59 pm Post subject:

This came up awhile back using a Mazda 83mm piston, from dealer pistons and add rings,each appx $100 each including tx, $500 for 4pistons/+rings, too rich 4 my blood to experiment to fit but it has been done. Cyls ($$?) Getting pricy if u can also find cyls, as usual no warranty offered at this time.

Low Bräu · Posted: Tue Oct 06, 2015 7:30 am Post subject:

Alstrup · Posted: Tue Oct 06, 2015 8:44 am Post subject:

Or use JE light weight pistons. That way you can also get the pin height right.
I just finished mock up on a 83,50 x 76 engine. Plenty of room to raise the pin height so engine with remains stock.

T

Mr. Okrasa · Posted: Tue Oct 06, 2015 8:47 am Post subject:

Low Bräu · Posted: Tue Oct 06, 2015 4:37 pm Post subject:

So these are 40HP big bore pistons with a 20mm pin and not early 1500 oversized pistons with the larger pin? Were the old Metal Leve big bore pistons 83.5? I recently purchased an NOS set of NPR (Japan) P&C kit that is 83mm not 83.5 that I plan on using with a set of cast iron Porsche cylinders. Thanks for the info.

j.
_________________
Independent German Auto
671 Fern Drive
Merritt Island, FL 32952
(321) 449-4665

Specializing in repair and maintenance for Porsche, BMW, Mini, Audi, and Volkswagen.

1952 Standard Beetle
1960 SO-23 Westfalia
1961 L-380 Turkis Deluxe Beetle
1985 Vanagon Country Homes Camper (work in progress - EG33 swap)

Mr. Okrasa · Posted: Tue Oct 06, 2015 5:28 pm Post subject:

Low Bräu · Posted: Wed Oct 07, 2015 7:42 am Post subject:

I'm sure those things are tough, if not impossible, to find these days. Thanks, again for sharing.

j.
_________________
Independent German Auto
671 Fern Drive
Merritt Island, FL 32952
(321) 449-4665

Specializing in repair and maintenance for Porsche, BMW, Mini, Audi, and Volkswagen.

1952 Standard Beetle
1960 SO-23 Westfalia
1961 L-380 Turkis Deluxe Beetle
1985 Vanagon Country Homes Camper (work in progress - EG33 swap)

morymob · Posted: Fri Oct 09, 2015 4:37 am Post subject: custom pistons

EGGE is a co in Santa Fe springs, custom make pistons,kits etc.


Hello! Log in or Register \| Help \| Donate \| Buy Shirts	See all banner ads \| Advertise on TheSamba.com

	Forum Index -> Vintage Speed	All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1