Jump to content


Photo
- - - - -

Stroker Kit For An A Series?


  • Please log in to reply
19 replies to this topic

#1 m1tch

m1tch

    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 1,044 posts

Posted 13 July 2009 - 08:12 AM

Hi everyone, just wondering on this one, most engine have an aftermarket stroker kit, just wondering if the A series has one, eg: Nissan RB26 engine + HKS stroker kit = HKS RB28 engine.

Just wondering if any aftermarket places do a kit?

#2 Pooky

Pooky

    Crazy About Mini's

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPip
  • 5,691 posts
  • Location: Sunny Sussex

Posted 13 July 2009 - 08:14 AM

What is a stroker kit? Is it to do with stroking the crank? This word is just sounding weird in my head now!

#3 m1tch

m1tch

    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 1,044 posts

Posted 13 July 2009 - 08:26 AM

A stroker kit consists of a piston and rod that increase the stroke of the engine, giving a larger engine displacement:

http://en.wikipedia....iki/Stroker_Kit

It basically increases torque and power, but due to the longer stroke the piston has to travel, it doesn't help high rpm motors...A series doesn't rev that high anyhow lol

Edited by m1tch, 13 July 2009 - 08:27 AM.


#4 Pooky

Pooky

    Crazy About Mini's

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPip
  • 5,691 posts
  • Location: Sunny Sussex

Posted 13 July 2009 - 08:35 AM

I think most people wanting to do this have there crank stroked. It involves the crank big end journals being off set grinded.

#5 998dave

998dave

    998cc's Of Dave Goodness

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPip
  • 4,566 posts
  • Name: Dave
  • Location: Essex

Posted 13 July 2009 - 08:39 AM

A stroker kit consists of a piston and rod that increase the stroke of the engine, giving a larger engine displacement:

http://en.wikipedia....iki/Stroker_Kit

It basically increases torque and power, but due to the longer stroke the piston has to travel, it doesn't help high rpm motors...A series doesn't rev that high anyhow lol


That wouldn't increase the stroke, the only way to increase the stroke is to replace the crank, as stroke is a measurement of the total distance the piston travels.

You could increase the bore by changing the piston, and reboring the cylinders, which would also increase displacement.

For info,
Increasing stroke tends to improve torque due to the larger moment on the crank, moving toward an 'undersquare' geometry.
Increasing bore tends to improve power as you have a larger volume without increased stroke, so higher revs and more power, this is an 'oversquare' geometry.
For general use, something close to square tends to be best, where stroke and piston diameter are about the same.

Dave

#6 Saxo-Fiesta-Mini

Saxo-Fiesta-Mini

    Up Into Fourth

  • Members
  • PipPipPipPipPipPipPipPipPip
  • 2,889 posts
  • Local Club: LCMOC

Posted 13 July 2009 - 09:36 AM

i honestly wouldnt spend the 2k it cost or there abouts for a stroker kit better to do an allspeed or z cars conversion if u want serious power or a mini turbo engine.

strokers kit are normally only used when a tunner has done everything else to an engine and wonder where they can get that extra bit of power from.

Or alternatively if its being built for the strip in which case torque wins it

#7 haz

haz

    Super Mini Mad

  • Members
  • PipPipPipPipPipPip
  • 568 posts
  • Location: Southport

Posted 13 July 2009 - 10:52 AM

i want z-cars for 2k :'(

#8 wolfie

wolfie

    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 1,149 posts

Posted 13 July 2009 - 10:59 AM

i honestly wouldnt spend the 2k it cost or there abouts for a stroker kit better to do an allspeed or z cars conversion if u want serious power or a mini turbo engine.

strokers kit are normally only used when a tunner has done everything else to an engine and wonder where they can get that extra bit of power from.

Or alternatively if its being built for the strip in which case torque wins it


christ you talk some crap!

That wouldn't increase the stroke, the only way to increase the stroke is to replace the crank, as stroke is a measurement of the total distance the piston travels.


close but not quite true


I think most people wanting to do this have there crank stroked. It involves the crank big end journals being off set grinded.


at last some sense!

a stroked engine is not rocket science if its kept N/A, a 1275 pre A+ crank is needed this can then be stroked and given S big ends a set of midget or s rods will be needed, you can get pistons with a shorter crown height i personally had mine machined

Edited by wolfie, 13 July 2009 - 11:01 AM.


#9 bmcecosse

bmcecosse

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 9,699 posts
  • Local Club: http://www.srps.org.uk/

Posted 13 July 2009 - 11:00 AM

You can of course use a 1098 crank ina 998 block - that increases the stroke - if that's what you really want to do. And long stroke cranks are available for 1275 blocks - at a price!

#10 Pooky

Pooky

    Crazy About Mini's

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPip
  • 5,691 posts
  • Location: Sunny Sussex

Posted 13 July 2009 - 11:13 AM

I think most people wanting to do this have there crank stroked. It involves the crank big end journals being off set grinded.


at last some sense!


:P I'm so happy! May have to go in the sig! :)

#11 liirge

liirge

    Up Into Fourth

  • Members
  • PipPipPipPipPipPipPipPipPip
  • 4,097 posts
  • Local Club: EDMC AND MMC

Posted 13 July 2009 - 11:14 AM

You can of course use a 1098 crank ina 998 block - that increases the stroke - if that's what you really want to do. And long stroke cranks are available for 1275 blocks - at a price!

Sort of mate,
You need new pistons to do this.

#12 998dave

998dave

    998cc's Of Dave Goodness

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPip
  • 4,566 posts
  • Name: Dave
  • Location: Essex

Posted 13 July 2009 - 11:19 AM

That wouldn't increase the stroke, the only way to increase the stroke is to replace the crank, as stroke is a measurement of the total distance the piston travels.


close but not quite true


I think most people wanting to do this have there crank stroked. It involves the crank big end journals being off set grinded.


at last some sense!

a stroked engine is not rocket science if its kept N/A, a 1275 pre A+ crank is needed this can then be stroked and given S big ends a set of midget or s rods will be needed, you can get pistons with a shorter crown height i personally had mine machined


That'll be replacing the crank then - which is what I said above!?
Or modifying the crank if you will - point is it's more then just con-rods and pistons.

Dave

#13 haz

haz

    Super Mini Mad

  • Members
  • PipPipPipPipPipPip
  • 568 posts
  • Location: Southport

Posted 13 July 2009 - 11:48 AM

just to add, i think im right in saying there are some billet cranks on the market which come with longer strokes and also with the larger journal size should you not want to use s-rods

also... i think you can do it with A+ cranks as well as A-series, it just has to be a non 's' crank... its basically any crank with bigger journals, you grind them to suit the smaller big ends of the S-rods and offset it whilst you do it

#14 wolfie

wolfie

    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 1,149 posts

Posted 13 July 2009 - 11:54 AM

just to add, i think im right in saying there are some billet cranks on the market which come with longer strokes and also with the larger journal size should you not want to use s-rods

also... i think you can do it with A+ cranks as well as A-series, it just has to be a non 's' crank... its basically any crank with bigger journals, you grind them to suit the smaller big ends of the S-rods and offset it whilst you do it


when i had mine done MED said you cant use A+

#15 haz

haz

    Super Mini Mad

  • Members
  • PipPipPipPipPipPip
  • 568 posts
  • Location: Southport

Posted 13 July 2009 - 11:58 AM

i stand corrected, MED know better!

anyone know why?




1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users