ka26e/ka26de omg has anyone else seen this?

[4gotn1]

any thought and opinions about this stroker kit?

http://www.importperformanceparts.net

has anyone bought it?

[Marshalarteest]

damn you got to be an idiot to get that... its over 2 grand!! just for the parts! and if you don't have the know how and machinery to do it yourself, its gonna cost you a lot of labor work. If you got that kind of money you should drop a skyline engine into your 240, you'd be getting a helluva lot more bang for your buck.

[c-rad]

damn you got to be an idiot to get that... its over 2 grand!! just for the parts! and if you don't have the know how and machinery to do it yourself, its gonna cost you a lot of labor work. If you got that kind of money you should drop a skyline engine into your 240, you'd be getting a helluva lot more bang for your buck.

$2800 for an assembled, built, and stroked block is NOT really that much. Take a look at the built shortblock costs for other cars out there...

[Kouks]

102mm stroke is crazy, keep it below 6000rpm and youre fine!

On a stock cammed 240, that would be alot faster than the 2.4L due to the torque. you could also take that stroker kit to up your compression to around 10.5:1 and another 5% increase in power.

[PandaS14]

you've gotta be kidding me. I don't care how much it costs, stroking a ka is the worst idea I've ever heard of. haha you've got to be *special* to buy that.

[Kouks]

I probably wouldnt do it either, but its really not that stupid, unless you always keep it at high rpms. Sounds like a .030 overbore too....It wouldnt be that bad at 6k rpm.

Thats 4000 ft./min piston travel at 6000rpm. Most of the time it would be below that. have a 6000rpm rev limit.....

[SMoKeM240]

that motor and a turbo= one bad *** street machine

[deviousKA]

importperformanceparts has been working on this stroker for a while, im glad to see it offered regardless the of the inherent pros/cons.

If it is true that the crankshaft is indeed a new stroker forging, its great, its about time the ka24 has more options in this area. The price tag is reasonable for new custom components.

Lower engine life, decreased redline, and the like. The setup is inefficient in operation without extensive balancing changes. One or two driven balance shafts would help to cancel out some of the damaging effects, increasing engine life and smoothness. In my opinion a 2.6l ka with this stroke will have half the life of ka24. What helps keep the ka24 rotating assembly as smooth as it is with its relatively long stroke is a good rod length. When going to like 100mm+ stroke a longer rod becomes unreasonable but is minor tradeoff when other modern techniques are used to compensate.

Still i like the outlook, the setup should produce some decent gains if its in the range your looking for. Cant wait to see some more examples, I know a few 2.6l ka's have been built with similar method.

2.5l will eat it for lunch.

[Kouks]

What method is used for the 2.5l kA? Just a 0.030 overbore?

[SunshineAcid]

holy crap, on my rebuild im getting this.i do like my 7k redline, but crap man. all that extra useable tq and hp? you can always get a great turbo setup for thatthe only thing that would concern me is the gearing on the rear end. maybe need to step it down a bit for a 6k redline =P

[PandaS14]

you need approximately a 91mm bore to achieve 2.5l at stock stroke.

.030 over yields 2430cc displacement.

I definately agree with devious in that I'm stoked someone is going through all the work to do this sort of work for the ka. Now if they would just take 6mm OFF the stroke, that would be sick.


Modified by PandaS14 at 4:23 PM 4/20/2005

[deviousKA]

91.1mm bore x 96mm(stock) stroke = 2502cc

That is what i run for 2.5l

Yes my blocks are bored .080" over, I dont know of anyone else that has done this, certainly no one has gone larger. Distance between bore reduced .080" as well.

Carefully planned, clearanced and assembled i have had zero problems with the setup.

[corn322]

holy crap, on my rebuild im getting this.i do like my 7k redline, but crap man. all that extra useable tq and hp? you can always get a great turbo setup for that

personally, I'd keep the 7k redline. don't forget you make more HP when your torque is at higher rpms.

200 lb-ft @ 4500 rpm = 171 HP200 lb-ft @ 5500 rpm = 209 HP

[ShionS14]

devious-with your overbore what is your compression ratio at? just wondering if you raised it or not

[deviousKA]

compression ratio raised from 8.6:1 to 10.5:1

Pistons i used are .060" taller than ka24 pistons (34mm).

This was with sohc head, this would not work in dohc pistons would hit chambers.

[4gotn1]

thanks for the helpfull info. i was thinking of using a turbo on the stroker kit, but i dont think im going to get it now.

but i think im crazy too. 2.6 + gt35/40bb turbo + 18psi daily = OH GOD

[thekage]

Its wonderful to see someone out there at least R and D'ing new stuff... With this many people into 240s... ITS ABOUT FREAKIN TIME!We are like the Honda crowd but with out Neon lights and stickers....

There is money and horsepower to be made.. we need more options...

I am suprised there arent Supercharger options yet....

[Kouks]

Devious, omg! .080 ovebore, geez...your block isnt sleeved is it? That is crazy.........

[ShionS14]

what size pistons would i need to bump up to or close to 2.5 liters for a dohc and where could i get them? dont want to raise the compression ratio really though

[PandaS14]

not to be an ***, but if you read through this thread both Devious and I have listed the piston size needed to achieve 2.5l

Where can you get them? you're gonna need to get some custom made or find some pistons out of other engines with the diameter you want, then machine them until they fit.

[SMoKeM240]

i think its .060 over to get it 2.5

[:: orion ::]

I'll copy-and-paste it here...again..for the reading impared:

Quote »91.1mm bore x 96mm(stock) stroke = 2502cc ...

Yes my blocks are bored .080" over...[/quote]Stock bore is 89mm...bored .080" over is 2mm increase to ~91mm...so you need 91mm pistons.

- Brian

[ShionS14]

thanks guys

[deviousKA]

didnt intend to change this to 2.5l thread.

When i built the first one really the only thing i was after was added compression in sohc. The displacement increase was just a side effect that i worked around. Pistons used are from mitsubishi 2.6l G54B in 91.1mm standard bore size. These come in different piston shapes and designs in starion/mitsu-mazda truck (b2600), and chrysler minivan. The ones i used came from early version 1983 2.6l with flat tops.

required piston top modification to clear headgasket and chamber edge, upgraded piston pin size to 22mm, and clearanced skirts. Rol headgasket which had the largest bore sizing and best spacing, as well as some new headbolts. It puts out over 210psi compression test with 272 duration cam.

Sleeves are not possible and offer no advantages, 91mm bore is ok for NA application but get block sonic tested before hand.

[Reno]

hmm so 2.5 would be good? for turbo?

[InsanityInc]

hmm so 2.5 would be good? for turbo?

I doubt it. With the cylinder pressures you'd be producing, you'd probably blow something.

[thekage]

holy thread resurection Batman!

[Bigvinnie]

you've gotta be kidding me. I don't care how much it costs, stroking a ka is the worst idea I've ever heard of. haha you've got to be *special* to buy that.

Pandas14 your a savage, but yeah your right.

The KA is already a STROKER to begin with! It doesn't need any more stroking!

It will decrease rev and make an even shiater power band, greater chance of bending a rod also.....

If you wan't more displacement just bore the cylinder wall out .040 ( a little under 2.5litre's) don't waste any time with those stroker kits.......
Modified by Bigvinnie at 7:24 PM 12/3/2005

[Bigvinnie]

importperformanceparts has been working on this stroker for a while, im glad to see it offered regardless the of the inherent pros/cons.

If it is true that the crankshaft is indeed a new stroker forging, its great, its about time the ka24 has more options in this area. The price tag is reasonable for new custom components.

OH yeah import performance parts should of focused more on a fullycounterweighed and knife edged crank than some B.S stroker kit that no one really want's.....Sorry for double posting...

[TrueSlide]

What is the average cost to get the KA crank knifeedged and how much of a higher RPM will it allow?