biggest P/C kit for 2.0
 

Hey folks
OK next question........ What's the biggest reasonable size you can put in before having to increase stroke on a stock 2.0? I see that a 2270 can be done 2 ways, with 96mm bore and 78mm stroke, or 103mm bore and stock (71mm?) stroke. The latter probably not best? But what about a large bore/short stroke for higher revs?
Then what about euro/US pistons, etc and who makes the best, where to buy, blah blah blah....
What combos are some of you running?
As my mind reels, I'm certain to come up with plenty more..............
Cheers All!
Jeff

SmileWavy

Several things to consider when making the engine larger, never mind the loss of longivity. Large bore/sjhort stroke will not be as efficient because the type 4 pistons and conbustion chamber are slow burning and the larger they are, the worse the problem becomes. But you have the short stroke that keeps the rod angles the same as stock so loads are less. The long stroke/slightly larger bore means slightly less efficient combustion but unless the cylinders and heads are moved out the rods have to be shorter which dramatically increases the anle loads on the rods near the wrist pin ends. Is this a problem you ask??? Yes it causes broken rods, even custom forged rods such as Pauter. If you want bigger, I'd go with the large bore, stock stroke as the engine should last longer. Good luck

I make big bore kits for the type 4, billet aluminum nikasil plated-- Nickies, available from 96mm to 106.3. If you want a big /4 and want it reliable, that's the only way to go. Otherwise, I'd say to stick to overboring your stock cylinders to 96mm and go from there. A 2270 indeed is a nice beast but if you want more, be ready to spend the big bucks. Remember- do it once, do it right. Don't kid yourself, it costs lots of money to do it right, but it's something you'll have for years to come.

Charles Navarro
LN Engineering
http://www.LNengineering.com
Aircooled Precision Performance

71x103 is 2366, not 2270. It won't touch a properly configured 2270 for a 914 application!

If you want to run a 103 bore, ya best be willing to spend bucks on a set of Nickies, else you just cost yourself about 90,000 miles of longevity and head leaks right out of the box.

Bigger is very seldom better. I make more power with my 2270 combos than many shops do with a much larger (too big and inefficiently designed) bigger engine.

Its not how big you go.........Its how you go big that should be the thought to consider in any engine build up. In February 'll have everything available parts wise to build a 150BHP 2270 with no guesswork.

Duh! I was referring with the 2270 to the 96 x 78 he was talking about Jake :-) My point I was trying to get across, that you did much better than I, was that if you want anything over 96, that Nickies are the only way to go.

Charles Navarro
LN Engineering
http://www.LNengineering.com
Aircooled Precision Performance

Jeff,

euro's are only the stock 94mm size......

Hmmm, thanks for helping clarify some things for me, you guys are great:) I wasn't sure what the dimensions are for a 2270 - I thought you could get it by either slightly bigger bore/stroking or just bigger P/C's (I don't know which mm though..)
So I guess I should wait to see what Jake's putting together, and go from there?
Keep 'em comin, opinions opinions opinions.......
Thanks so much, y'all

I'm not putting anything "Together" that I don't already.... BUT I'm making MY parts easily accessible for guys who want to do it themselves with no guesswork. All parts will be sold compatible and ready to rock. Just add assembly. I even do the configuration if you spend 1K on parts