BC 2.6L - 106mm crank + 4G64 block

[JWoodley]

Discuss:

Part #: BC0110
- STROKER KIT - Mitsubishi 4G64 Block w/4G63 Head, 106mm Stroke Billet Crank, BC625+ Rods, Custom Pistons
- Stroker kit designed for 4G64 tall deck block. Go to a 2.6L with 87.5mm bore. Kit includes 4340 billet 106mm crank, Pro Series custom rods, custom pistons made to your desired bore and compression, pins, rings and locks. ACL Race Series rod/main bearings sold separately.

 

[2gAWDTalon]

Sounds like fun for a street motor. Dont plan on revving the piss out of it though.

 

[JWoodley]

I wonder what it would do to transmissions. I figure she could still wind out to 8300-8700rpms.

 

[2gAWDTalon]

I wonder what it would do to transmissions. I figure she could still wind out to 8300-8700rpms.

That is alot of bore.

 

[Tarascan79]

Does someone actually sell that as a kit?

 

[2gAWDTalon]

http://www.briancrower.com/view.php?pn=BC0110

 

[Tarascan79]

Ouch! $3300. Man i wish i could afford that

 

[pnishr]

I wonder what it would do to transmissions. I figure she could still wind out to 8300-8700rpms.

I'm thinking "not so much..."

Rod Ratio of 1.44 (if they use "stroker pistons" and a 153mm rod)

That's worse than a 2.3l stroker (at 1.50)

I don't think I'd be comfortable taking that above 7500... if that. But, as stated, it could be cool on the street with a mid-sized turbo that it could spool quickly.

 

[nanokpsi]

I'm thinking "not so much..."

Rod Ratio of 1.44 (if they use "stroker pistons" and a 153mm rod)

That's worse than a 2.3l stroker (at 1.50)

I don't think I'd be comfortable taking that above 7500... if that. But, as stated, it could be cool on the street with a mid-sized turbo that it could spool quickly.

IIRC you end up losing around 500 rpm to a 100mm crank as far as piston speeds are concerned which isn't a huge deal. It might not be worth it in the end for that ~10% increase in motor size though.

 

[Rogue_Ant]

So anyone try this yet?


Rogue

 

[Savage Talon]

It's for 7 bolts only.

 

[JWoodley]

It's for 7 bolts only.

How many 4G64s have you seen crankwalk?

 

[Got Rice Galant]

How many 4G64s have you seen crankwalk?

I'm sure he's only saying that as he has a 6 bolt.

 

[gixrman]

The large torque increase from the added displacement will makeup for the loss in rpms.

 

[Rogue_Ant]

How much of a loss of RPM though? What would be an acceptable redline for a street car with this stroker kit?


Rogue

 

[Savage Talon]

How many 4G64s have you seen crankwalk?

I have never seen a 7 bolt walk.

I'm sure he's only saying that as he has a 6 bolt.

Bingo

 

[gixrman]

How much of a loss of RPM though? What would be an acceptable redline for a street car with this stroker kit?


Rogue

Well if I was going to drop 3k on a stroker kit I would be calling the manufactor (BC) to get as much info as possible on what is suggested. With that much more displacement you are now changing everything about the air flow capabilities of your engine. What worked before will now be a choke point. First I would tell them what I intend to do with the motor and then ask for suggestions on cams, turbo, intake, TB and so on. I want this kit for my 4G64 I have in my garage but my wife wants a kid so my dreams for my 4 banger sleeper are doomed......

 

[Tarascan79]

Do you know if you use the 2.4 head or the 2.0 with this kit? But i would love to see someone get this kit.
Gixrman Ive got two kids and they are definatly expensive. Just tell your wife if she wants kids she has to give up the income tax for the next 3 years, which I might ad is very huge when you have kids.
opps just noticed it says 2.0 head

 

[gixrman]

If I was to do this I would go with a full CNC ported head.

 

[kottyking]

You won't need to rev to the moon and back with something like this. The Torque is gonna be there, plus that could spool a monster turbo quick.....wonder what it would do drivetrain parts....

 

[TunaTalon]

How much of a loss of RPM though? What would be an acceptable redline for a street car with this stroker kit?

Rogue

While writing StrokeOrNot.pdf (http://www.kidzuku.com/StrokeOrNot.pdf ) I did not calculate this 4G63 configuration. (Thought about it and chuckled though.)

If someone can post the weights of the pistons and rods here I will run charts for piston acceleration, velocity, rod tension, and harmonic imbalance.

On first blush it looks like such an engine would be limited by it's ability to breath; as gixrman suggests.

 

[JWoodley]

While writing StrokeOrNot.pdf (http://www.kidzuku.com/StrokeOrNot.pdf ) I did not calculate this 4G63 configuration. (Thought about it and chuckled though.)

If someone can post the weights of the pistons and rods here I will run charts for piston acceleration, velocity, rod tension, and harmonic imbalance.

On first blush it looks like such an engine would be limited by it's ability to breath; as gixrman suggests.

I'll work on getting the weights. Care to crunch the numbers for the 4G64 (4G64 block/100mm)?

 

[TunaTalon]

I'll work on getting the weights. Care to crunch the numbers for the 4G64 (4G64 block/100mm)?

The 4G64 has the same 150mm rods and same 100mm stroke as the 2.3L stroker.
With the stock pistons, all numbers are the same as the 2.3L. With stock pistons in the 4G64 the only difference is the pin location in the piston.

It is possible to use the stroker pistons as in the 2.3L with a longer rod in the 4G64 block but I didn't find enough people doing that to justify more charts in the white paper.

 

[just90gs]

I have never seen a 7 bolt walk.





Bingo

This can be the 6 bolt part number BC0110X