Just curious has anyone ever put the bottom end off a 2.2i Frontera on an XE?? Is it possible?? Just wondered if this a cheaper and easier solution to big boring an XE...
Steve
i'm pretty sure it wont fit the block, well thats if it bares any relation to the 2 litre ecotec block which WILL NOT mate to an 20XE head. the head is a different shape, bolt spacing is different, oil and water galleries are in a different position and are different shape.
The xe head does fit the ecotec block but there is a lot of other work needed, it can also be bored to 88mm to give 2.3 and then fitted with a turbo,all you need is money.
Failin that the early 2.2 crank fits the XE block but then you need to get rods and pistons made, this can also be bored to 88mm and fitted with a turbo.
None of these options are easy or cheap.
8K is nothing really though, there are 20XE engines out there well over 10K
Its possible, but there isnt much point on a non turbo, as generally increasing the stroke will result in a drop in volumetric efficency as the engine (for any given revs) now has to try and inhale more air during the same time period through the same size valves, so invariabley it does a less effective job of doing so.
no the point im getting at it this stroker kit is always rubbished on this forum by many people, yet the jap guys use it very successfully on their engine and they are turbos too ok they wont rev them to 10k for a 4cyl but at least 8k
Evo engine is almost LET territory 85>87 bore/stroke.
The difference is the Jap stuff has been developed for along time. Volumetric efficiency isnt so important on a turbo engine as the airs being forced in anyway! I would agree that the cost of doing this far outways other means of extracting power outta the std 2.0LET lump though!
Stroking works fantastically on turbo or nitrous cars, but its of limited use in terms of N/A cars.
In my experience it just results in pretty much the same BHP figure but lower down the rev range a bit, so you do pick up more torque.
Some of the mini lads offset grind the crank and then use thicker bearings, or conrods with smaller big ends, that seems a bad idea to me in terms of reliablity though.
long stroke engines arent weaker as such, they just dont handle revs as well.
if you take this 100mm stroke engine here for example to the same revs as an 86mm engine (of identical material spec etc)(then it will be more likely to failure of both the big and little ends.
Just to explain that a little, the pistons will be moving faster in the longer stroke engine, because they have to go further for each rev, so at 8,600revs on a 100mm stroke they will actually be travelling at the same speed as at 10,000revs on a 86mm stroke.
Chip
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