What are the performance figures of the 2.6 short-stroke?

[Shuie]

So whats the best way to a 2.6?? De-stroke a base 2.4T or a early 2.7CIS motor with 66mm crank and 2.2 rods or look for a 2.2 motor and do all of the case mods, etc?

I know the 7R and early aluminum cases are probably more desirable for the high revving engines like these due to their extra strength, but can a 2.2 mag case or even a 2.4 5R case be shuffle pinned etc so that it will hold up?

[blue72s]

I know the 7R and early aluminum cases are probably more desirable for the high revving engines like these due to their extra strength, but can a 2.2 mag case or even a 2.4 5R case be shuffle pinned etc so that it will hold up?

I would think so yes because the shorter throw crankshaft does not flex the case as much.


Henry,
What's a crank fire system?
Secondly, will a Bosch RSR twin dist fit a 7R case and is its advance OK?

[Shuie]

http://www.clewett.com/
- click the catalog link, and then the iignition system link. search here for 'HPX' or 'HPV-1' for old threads about crank fired ignitions.


Im real curious about a comparison between a 2.5 and the 2.6 thats being discussed here. I didnt want to hijack this thread, so I started a new one here.

[snowman]

Short stroking a Porsche is an ideal situation. Why? Because Porsche engines can breathe, breathe very well into the very very high RPM ranges and short stroking helps them rev higher into their more efficient operating range. Porsche heads will support 10,000 to 12,000 RPM operation, the stroke will not unless its shortened a lot. But wait you loose cubic inches and the cylinder to cylinder placement limits the bore. But alas theres another Porsche downfall, at least until recently, air cooling. Air cooling does not support over 300HP reliably, thats according to Porsche engineers and agrees with practice, ie people who do not want to deposit piston material on the exhaust system.

[blue72s]

Originally posted by Henry Schmidt
This engine would be happier with a 2.2 "S" pump than a 2.7 RS pump.

Because it will want to spin higher RPMs 38 mm intake ports make more sense.

Should throttle bodies be from a 2.2S as well? How about 2.8 high butterfly injection?

Should both ports be 38mm or just the intakes?
TIA