stroke and bore of a real 356 1600 super

It was discussed this week how much the new engine in my bug sounds a lot more like a early 356 engine. that it got me curious again!!

This engine has a 85.5 stock bore. with 74 cc stroke.

What is the stock stroke and bore of a real 1600/super engine? Id like to know!!!

82.5 x 74 1,582 cc's for the 356 and 912 engine

85.5 x 74 1,699 cc's

The distinctive exhaust note from the 356 and 912 was a combination of the cylinder heads with rectangular exhaust ports and the muffler

AH HA ! I Knew it!! I have a homemade sidewinder on mine and D port heads .
It even has that distintive pop just like a twin cammer,, but no gear whine.

But this is Just what I wanted for the D. Now I know. I just hope the gearing will be high enough for the stroke a 3.67 is still not a 341 gear. It may turn more than it should if I don't tweek the rear tire size up to 26+1/2.height.

Thanks Larry!!

Larry One more question What is the stock 1600 supers Compression ratio?

Mine is 8.25-1 Does this sound like a reasonable ratio for 87 Octane fuel??

Barry, Usually CR in the 7's is OK for 87, If it were me, I'd probably run mid grade 89.

I'm not sure of the stock compression ratio but my guess is that they bumped it up to the high 8's or low 9's to get the HP gain.

Thanks Larry...

My guess was 8.5 to 1. on the Super ..

On mine 8.25 to 1 is the same as the Hot VW milage motor and they ran 87 octane. So we kept it the same But I will take or advise and look into it.

Don't confuse the static and dynamic compression ratios by comparing the Hot VWs build with a performance cam to the SC engine with the same CR and a stock cam..

Adding camshaft DROPS the actual CR of the engine.

They have the same cam. as per the order. When I had it built. Heads are different Im not running efi heads with the smaller valves Just one size up from stock D ports.

The static and Dynamic CRs should be negledgable. I was thinking about the head temps when the engine was plained.

If the larger valve aids the cam to lower the crs any It will just make it more able to run the cheaper fuel that much easier.

RIGHT???

The comparitive compreeon test yelded 165 on all 4 thats pretty hi . I now beleive Strickly Foreigen did not deck the engine correctly and is much higher than spec'ed at build time .