Brian Crower Stroker kit

[Swedish Mike]

This kit is cool! Really nice to see a good crank design.

As someone said there is stroker kit´s for the old (gay) Volvo I4´s here taking it from 2.3 to 3 litres but most guys stop at 2.6 or 2.7 when they go turbo.Works really fine with 103 mm stroke and I´ve seen some crazy revs when they use it with the 16v head.

[nissanfanatic]

Who cares what the stroke, displacement or engine code is..?? You tune for MBT unless you are looking for a specific powerband. No engine magically calls for 30* of timing without any kind of information feedback on torque production. You have no idea what timing needs to be set at until you reveiw torque production.

An increase in static displacement may give an increase in torque and power at relative RPM. But the loss in power over time may not be worth the trade-off. How does the RB26 make so much power? With RPM.

[seang]

Anyone who has the balls to buy a ka stroker kit deserves a kiss on thier ***. Just let me know who you are and I will arrange to have a sex worker call you every day for the next week.

[GTR PrYdE]

Heh, I believe a FCW crank is awesome, so anyone who buys this kit hopefully takes that into consideration.

[Crazyirish]

to seang:Not only was that a worthless post, but you replied to a year and a half old thread. You fail at the internet.

If you really want access to the classifieds you'll need to do a little better than that.

[480sx]

Erm, while im not familiar with stroked motors, 30 is way to much advance IMO. 24 is really as far as you want to push a fuel injected DOHC. This might be differnt with stroked motors but i cant see it changing that much. Especialy if your boosted, with 30, you will blow your sht up quick.

I cant believe i said that.

Damn you for bringing this thread up from the dead!

A FCW crank would kick *** for a Ka but were talking 1500+ to get one. At that point there are so many better options that have better power/dollar and better power/weight, along with dollar/reliability. LSx, man, if i was smarter(and not stuck on turbos..) my 240 would be powered by GM.

Anyway the stock crank is built really fvkin well. Get your rotating assembly balanced, put an ATI dampener on it and let it rip to 8000 or so. The stock cranks held a TON of hp, consistently. You never hear of warped or broken cranks on a Ka.

Not a big fan of BC, so im kinda biased. Maybe their cranks are better than their cams..

[spooled240]

Anyway the stock crank is built really fvkin well. Get your rotating assembly balanced, put an ATI dampener on it and let it rip to 8000 or so. The stock cranks held a TON of hp, consistently. You never hear of warped or broken cranks on a Ka.

can you explain how that will allow a ka to rev to 8K? I heard ka's have forged cranks and some of the later versions came with forged rods (97-98 s14?) but the ka's only downfall IMO is the low revs...if that drawback can be eliminated, the ka will be one unstoppable 4 banger
Modified by spooled240 at 11:12 PM 12/17/2008

[480sx]

Its never gona be a honda, and its never going to make amazing power up top. The way the crank is built prohibits this. However, if you do balance the rotating assembly and deal with the harsh engine harmonics of higher rpms with an ATI dampener, you can get an 8000 rev limit as long as you have the rest of the mods to support it. Just gives you more spooled time, a longer powerband.

I mean the ka stock revs to 7000. Not exactly that low, but i guess when compared to a sohc honda or something..

The ka has a head thats almost built for high rpm operation, there isnt any problems with it. The ka itself can rev out to 8000 in stock trim however the need isnt really there because the power drops off so hard. In addition thats putting a lot of extra force on the rods.

[spooled240]

true, the ka really doesn't need to rev that high anyway..7K is killer enough for an engine that produces some mad torque under 3000 rpms leave the high revs for the hondas and the sr's

How risky is reving a stock ka to 7K? I rev that high occasionally but I feel like i'm asking for a thrown rod when that needle goes into red territory

[480sx]

I reved mine to 7k all the time, i think its a pretty common rev limit for a stock ka. As far as risk involved? Lol idk man, more rpms more risk but, i dont think there is much risk. The stock block rods are the weak link, the head is bullet proof at 7000. As long as your 350 and under with a good tune i cant see you having any failures

[spooled240]

Yeah i couldn't help but rev to 7K when I drag raced my car at the track, I think going into redline 1 or 2 seconds at a time is OK but a sustained rev over 7K maybe asking for it lol. But i think you're right, 7K on a stock ka should be no sweat.

I heard the stock rods are pretty strong and could handle 350 hp, I'm not completely sure if they are forged(probably not) but I have heard the 97-98 rods are forged. Going over 350hp on stock rods would be pretty amazing tho

Does anyone know if there is a FCW crankshaft available for the ka keeping the stock stroke?

[480sx]

None of the ka rods are forged.

You can get a custom crank ground at stock stroke from BC and a few other companies. There was a GB that people were trying to start on the org for one.

[spooled240]

then what's so special about the 97-98 ka's? I am obviously getting some mis-information here.

I was thinking..would solid MM have any affect on the engine harmonics of a half-counterweighted crank at high rpms? It might stabilize the harmonics from resonating into one destructive vibration

[480sx]

The only thing different is the 98 ka's. They switched to a single row timing chain, RIGHT before they D/Cd the 240.. Stupid move IMO, the duel chain rocks. Their only problem was the damned guides.

Nothing other than that is special about the 97-98's.

As far as your solid MM question, very doubtful that it would have any effect at all. The engine harmonics are created by the rotational mass of your engine, and mostly effect the crank shaft. Regardless of how much of that is absorbed by the chassis of the car, the original source of the vibrations is still going to be there, robbing power and eating bearings.

[spooled240]

^hmm then how does an ATI damper help out with those engine harmonics? I believe ivan's ka-t had the stock crank, but idk how high he was reving making that 9 sec run.

all ka's have the girdles too right? Ka-t guys tell me the only way my ka-t is still running is because it is a 97 lol..i think they are jealous because their ka's couldn't handle the 15 psi of boost on stock injectors and no tuning lmao

[480sx]

An ATI dampener absorbs vibrations from the crank better than a stock dampener does. Less vibrations less harmonics. In reality its crank vibrations that kill the kas reving potential, but its all the same beast. Im not sure about Ivan, im assuming to about 8k but the info's gotta be out there. Curious now that you have asked. The stock ka's all have full girdles, which is one of the reason the ka's crank is so bullet proof.

Ka-t guys tell me the only way my ka-t is still running is because it is a 97 lol..i think they are jealous because their ka's couldn't handle the 15 psi of boost on stock injectors and no tuning lmao

Lol, exactly. Nico/knowledge ftw.

[spooled240]

That ati dampener (aka harmonic balancer?) is expensive but definitely cheaper than a FCW crank

Ivan's ka-t still has the stock dampener: http://www.turbo240.com/images/ivanwallpaper2.jpg

I could only find one dyno sheet of his car but it is a hp vs mph so idk what rpm he revved it to. It looks like he went all the way to about 100 mph but I'm pretty sure he changed all the gearing so

w/e 7K is high enough while still safe for the KA IMO ...i mean let's face it: It's a damn truck motor

[480sx]

Yea its as expensive as hell, one of those things i want but doubt i will get for a while. Cory went over its benefits over a stock dampener somewhere on the org. I forget the terminology he used and the exact numbers. I just remember that it was a significant improvement.