2.8l-3.0l ka24de

[s14touge]

A freind and i sat down the other day and talked about this being a possiblity. I am just asking the question of can this be possible. The engine is already a 2.4l and stroked(i guess). Is it possible to acheive that dispalcement maybe with a bore and longer stroke? Lets hear some of your thought on this????

[MoldyOldy240]

I don't mean to be a d!ck, but did you search at all?

BC made a 2.65 stroker kit for about 3g's

[Razi]

lol increasing the stroke of the KA. rofl.

[s14touge]

oh i should have searched. sorry. but what about the 2.8l? could the car be a stable daily driver. idk a 2.8l 4 cylinder sounds kinda cool.

[Aworkinprogress]

Here are some questions to help answer your question. Piston size and pin location, Rod length, and length of stroke. Every time you change one of these to increase displacement the others will be affected. An example given would be if you increase the stroke to gain more displacement you may need to lengthen the rod to accommodate for too high of a rod angle. This can lead to premature wear of pistons, rings and even come in contact with cylinder walls. Increasing the rod length leads a shortened piston. The less gap between the pin and the rings means more oil consumption and could compromise dependability. Though typically there is plenty of room. If you would like the engine to continue to rev in higher RPMs it is essential to maintain a square piston bore and rod length. Rod ratio also needs to be taken into account. I say, ideally a rod ratio of 1.6 to 1 is good. others will go as far as 1.5 to 1. you figure this, easily, by taking the rod length and dividing it by the stroke. The easy way. Ask some machine shops to help you out, that have experience on the ka motor, and they should be able to give you a rough answer if it can be done.

[s14touge]

yup thanks. i am working on an apprinticeship at a friends machine shop as we speak.

[AZhitman]

Not gonna happen.

It's mathematically impossible - Even a "big" bore only nets you roughly 80cc of displacement, and a stroker kit is a sure-fire killer for high rpm's in a KA.

[MoldyOldy240]

In which case; wouldn't you want to do it on a SOHC since the air at lower RPMS flies in at a high velocity?