HKS New Stroker Kit and Evasive Motorsports Engine Build 2014 UPDATE 9/9/14

[R2RO]

I need this in my life, Im guessing the price will be somewhere north of $3500 but below $5500

[xwd]

Originally Posted by R2RO

I need this in my life, Im guessing the price will be somewhere north of $3500 but below $5500

I think you are being extremely optimistic. None of their stroker kits are $3500, they are all close to $5K, I expect this one to be closer to $5500-7500.

[350matt]

Blimey

5K for 200cc so say 10% bump in power.....

you really got to want to stay NA with this oone

[motokev]

Preliminary official release and pricing is slated for the end of this Month. I think most will be quite happy. I'll post it up when I am ok to do so.

[stevo_12v]

Prob a nub question. Would it be beneficial to also run/install those Crawford phenolic spacers?

[Carlitoz3]

Originally Posted by stevo_12v

Prob a nub question. Would it be beneficial to also run/install those Crawford phenolic spacers?

Hope something comes good out of them.
Already bummed the oft w/e85 tune doesnt benefit with them

[lukmanaryadi]

Niceeee


Sent from my iPhone using Tapatalk

[D K]

You guys realize that this math is hopelessly wrong?

Originally Posted by Jason@DSG

Here's the formula to calculate displacement:

(PI/4) x Bore2 x Stroke x Number Of Cylinders


So if we take the HKS Crank at 90mm and let's say add in 87mm pistons in a sleeved block application, our new displacement is:

0.7854 x 7569 x 90 x 4

= 2.14L

Going to 90mm pistons and sleeve is very risky and completely unnecessary. 87mm would be the absolute ideal and max here IMO

[Jason@DSG]

Originally Posted by D K

You guys realize that this math is hopelessly wrong?

Actually, I'm pretty sure it's correct . You do understand the formula was if you were using 87mm pistons and the HKS stroker crank at 90mm right? Unless you're referring to step I left out where I convert mm3 to CC to L, I simplified it and just put the L


[ame="http://en.wikipedia.org/wiki/Engine_displacement"]Engine displacement - Wikipedia, the free encyclopedia[/ame]


http://albertstreetmiddle.nbed.nb.ca...alculation.htm

[mid_life_crisis]

Originally Posted by Jason@DSG

Actually, I'm pretty sure it's correct . You do understand the formula was if you were using 87mm pistons and the HKS stroker crank at 90mm right? Unless you're referring to step I left out where I convert mm3 to CC to L, I simplified it and just put the L


Engine displacement - Wikipedia, the free encyclopedia


http://albertstreetmiddle.nbed.nb.ca...alculation.htm

Dividing pi by 4 is what is throwing the rest of us off.
The radius squared times pi gives you the surface area of the cylinder.
Multiply that by the stroke to get the volume of the cylinder.
Multiply by the number of cylinders to get the total displacement.


For a car, (bore/2)(bore/2)(pi)(stroke)(#of cylinders) and divide the whole thing by 1000 to get cubic centimeters from milliliters.
So take half the bore and square it then multiply times pi and multiply that times the stroke then multiply that times the number of cylinders then divide that by 1000.


The way you did it is a formula that will work but it doesn't follow the normal way of developing the formula so it looks wrong at first glance.

[Jason@DSG]

Originally Posted by mid_life_crisis

Dividing pi by 4 is what is throwing the rest of us off.
The radius squared times pi gives you the surface area of the cylinder.
Multiply that by the stroke to get the volume of the cylinder.
Multiply by the number of cylinders to get the total displacement.


For a car, (bore/2)(bore/2)(pi)(stroke)(#of cylinders) and divide the whole thing by 1000 to get cubic centimeters from milliliters.
So take half the bore and square it then multiply times pi and multiply that times the stroke then multiply that times the number of cylinders then divide that by 1000.


The way you did it is a formula that will work but it doesn't follow the normal way of developing the formula so it looks wrong at first glance.

There's a few different ways to calculate it and they all come out to the same thing. In the two links above, there's the 2 for the ones that are the simplest, I prefer the first because it's more accurate (the one shown in Wikipedia).

PI/4 (0.7854) x Bore2 is the same result as PI x (radius)2 if you do the math (calculating the volume of a cylinder standard formulas)

Scroll down here to cylinder and hollow cylinder:
http://www.engineeringtoolbox.com/su...ids-d_322.html

Anyway, as @D K said, I'm hopelessly wrong haha

[D K]

My bad.
Didnt see you were using 87mm

What do I know

[D K]

Originally Posted by Jason@DSG

Anyway, as @D K said, I'm hopelessly wrong haha

I never said YOU were wrong. Just the math

[mid_life_crisis]

I haven't looked at any of those links yet as I don't have time right now, but let's face it, the formulae we've been discussing aren't total displacement, they're the change in displacement from TDC to BDC. Total displacement should probably include the combustion chamber area above the piston. It's probably minimal, but it counts.