does anyone know of a company that makes a stroker kit?

Post by **joukaishou813924** » Thu Dec 10, 2009 7:23 pm

I tryed to search for one but all I can find are dead links to websites that don't exist anymore, does anyhone know of a company that makes a stroker kit, and if not does anyone know how much work is involved in using a vk crankshaft?

Post by **John Dixon** » Thu Dec 10, 2009 11:57 pm

You need to speak to Bryan Hartley at the headshop, New Zealand.I believe he has taken these up to 400ci with overbore and offset crank pin grind.If you're just after a slight increase I got mine up to 5l with an overbore to 98mm

Post by **joukaishou813924** » Fri Dec 11, 2009 6:10 am

Does he have a web site or any way to get a hold of him?

Post by **Bart** » Sun Dec 13, 2009 3:44 pm

Im sure this has been asked a trillion times so i appologise, but would a VK56 crank fit in a VH41/45 USA and JDM??I think there is a real appetite for a larger stroke crank for the 41's and 45's. But not sure if there are enough people who want one to keep the cost down?Maybe SCAT will do a few?

Post by **Chrispy300** » Sun Dec 13, 2009 5:25 pm

There was some talk of the VK56 crank a while ago. Nothing definitive as far as I know. I think Ultrapulse was trying to source one for a while.

Post by **Bart** » Sun Dec 13, 2009 8:20 pm

I dont understand the difficulty of making a stroker crank from scratchDont you need a lump of 4340 chromolly and a CNC lathe?I mean it would be difficult for me as i couldnt design and operate this machine but i know there are many who can.

Post by **Chrispy300** » Sun Dec 13, 2009 8:42 pm

You need a pretty large hunk of steel and a while in the CNC. There is a huge thread on Hybrid Z about some guys who want to make a flat plane crank just for the sound of it

They seem to reckon about US$2k-2.5K to get it done. Which I reckon is reasonable, and I'm sure the cost would drop pretty quick if you got 5+ made.

Post by **John Dixon** » Sun Dec 13, 2009 11:10 pm

joukaishou813924 wrote:Does he have a web site or any way to get a hold of him?

Best bet is to call him: 64 6 3555070Try about 9am NZ time, he's a real helpful and enthusiastic guy.

Post by **SuperHatch** » Mon Dec 14, 2009 1:29 am

I spoke with Brian Crower a while back, (the person, not just the company) and he said he would be willing to make a set if there was enough interest. Minimum run was 5 cranks at 2500-3k a pop.

Just throwing it out there.

And about the flat plane crank... I agree the sound is amazing, but don't forget you'll need custom cams and stand alone to manage the new firing order. Not to mention vibrations are abundant in flat plane motors.

Post by **Bart** » Mon Dec 14, 2009 2:53 am

Vibrations worry me a bit on a street car.Is it that bad?But then you need custom cams, i got a programable EMS

Post by **Bart** » Mon Dec 14, 2009 2:59 am

SuperHatch wrote:I spoke with Brian Crower a while back, (the person, not just the company) and he said he would be willing to make a set if there was enough interest. Minimum run was 5 cranks at 2500-3k a pop.

Just throwing it out there.

And about the flat plane crank... I agree the sound is amazing, but don't forget you'll need custom cams and stand alone to manage the new firing order. Not to mention vibrations are abundant in flat plane motors.

Thats not a bad price concidering the work.Whos Brian Cower? I will Google

Post by **Aus450zx** » Mon Dec 14, 2009 3:08 am

you'd also want new extractors because the scavenging will be different, the tuning of the intake manifold would probably be out as well?

Post by **joukaishou813924** » Mon Dec 14, 2009 8:29 pm

For those prices ill give up on a stroker kit and just bore ans sleeve it.

Post by **Bart** » Tue Dec 15, 2009 4:46 pm

joukaishou813924 wrote:For those prices ill give up on a stroker kit and just bore ans sleeve it.

But i think a longer stroke would make more torque?

Post by **PyroTheGreen** » Thu Jan 07, 2010 7:55 am

There is a company called Paeco Inc, at http://www.paeco.com. They make many race quality parts, specializing in import vehicles. Their price list does not specify the price for a VH45DE stroker, but does say they can manufacture one for any vehicle given the specs for that motor. Based on their prices for 4 and 6 cyl strokers, I would guess roughly $2600 for an 8 cyl kit.

Keep in mind however, I have only as much as considered ordering parts from this company. I cannot find anyone who ever has or is willing to vouch for the quality of the parts or service provided.

Post by **carfrk666** » Wed Jan 13, 2010 1:12 pm

how about going to a machine shop with a CNC and get a chunk of 4340 steel, make up some dementions on CAD and create a billet one?

Post by **Mettler** » Wed Jan 13, 2010 2:27 pm

Why bother? You'll end up with the same problem as the aussie Ford's 5.4 litre engines. They have 4 valve/cyl heads designed for the revvy 4.6 mustang engine, but basically a truck style long stroke bottom end, thus sacrificing top end RPM where the heads are designed to perform.

It'd be cheaper to put on some turbos, a supercharger, nos, or even to get a VK56 engine, than to screw around building a stroker crank for the VH45 & having to replace your rods.

Post by **Bart** » Wed Jan 13, 2010 3:22 pm

Thats a good pointMay better to bore the cylinders to give more capacity as mentioned above.This way the revvy nature can be kept with short stroke and bigger cylinders.

Post by **Bart** » Thu Jan 14, 2010 3:32 am

Bart wrote:Thats a good pointMay better to bore the cylinders to give more capacity as mentioned above.This way the revvy nature can be kept with short stroke and bigger cylinders.

But then iv seen Gen III's rev pretty hard with their longer stroke. Gen III Bore x Stroke: 99.00 x 92.00 mm VH45 Bore x stroke- 93x82.7mm (3.66/3.256in)Hmm, how many inches would i get if i bore out the VH41/45 to 100mm, then bump the stroke a little?? Just worked out 100mm x 82.7mm = 5.2lts100mm x 92mm (same stroke as GenIII = 5.78ltsI mention 100mm as i have heard someone here boring the VH to 100mm
Modified by Bart at 1:37 PM 1/14/2010

Post by **Chrispy300** » Thu Jan 14, 2010 11:52 am

How much power are you going for Bart? Isn't a TT VH45 enough?

The bore to stroke ratio actually gets better if you increase it to what you have noted. I thought there was another ratio that had to be considered when stroking a motor, can't remember for sure though

And Gen3 is LS1 for our American Mates

Post by **kingkilburn** » Thu Jan 14, 2010 1:34 pm

With that kind of bore and stroke he may be able to ditch all the heat and ware of the turbos.

Post by **Bart** » Thu Jan 14, 2010 2:49 pm

Only way i would ditch the turbos i got is to put larger ones on lol. Nope im keepin them, even if i get a chance to increase capacity.

Post by **Bart** » Sun Jan 24, 2010 2:22 am

Mettler wrote:Why bother? You'll end up with the same problem as the aussie Ford's 5.4 litre engines. They have 4 valve/cyl heads designed for the revvy 4.6 mustang engine, but basically a truck style long stroke bottom end, thus sacrificing top end RPM where the heads are designed to perform.

It'd be cheaper to put on some turbos, a supercharger, nos, or even to get a VK56 engine, than to screw around building a stroker crank for the VH45 & having to replace your rods.

VK56 wouldnt be legal in a 1060kg Torana, need a 4.1 ltr block with 6lt guts hiding inside.

Post by **Mettler** » Sun Jan 24, 2010 3:41 pm

With an increased stroke crank, at a guess you'd need to modify or replace the factory windage tray too.

Chrispy300 wrote:The bore to stroke ratio actually gets better if you increase it to what you have noted. I thought there was another ratio that had to be considered when stroking a motor, can't remember for sure though

Yeah, it's rod to stroke ratio...

It may interest you to note that the VH45DE has almost exactly the same bore/stroke ratio as the Ferrari F430 V8.

Post by **Bart** » Sun Jan 24, 2010 3:49 pm

[QUOTE=Mettler]With an increased stroke crank, at a guess you'd need to modify or replace the factory windage tray too.Windage tray change would be ok.Im thinking of dry sump in the future, so the tray would be important but the least of my worries. But yeah you have a good point with the heads designed for high rev.

Post by **twoeightythreez** » Sat Jul 02, 2016 11:35 pm

For those of us that want to keep the vh in the nearly 2000kg q45 (if you include myself, a baby seat, trailer hitch, toolbox, etc...yes, it does weigh that much), more torque is definitely welcome.
Besides, If a damn 600cid big block chevy can be built to Rev 8000rpm there is no reason why the vh would lose any of its revability, even if built as big as possible.

does anyone know of a company that makes a stroker kit?

does anyone know of a company that makes a stroker kit?

Re: does anyone know of a company that makes a stroker kit? (joukaishou813924)

Re: does anyone know of a company that makes a stroker kit? (John Dixon)

Re: does anyone know of a company that makes a stroker kit? (joukaishou813924)

Re: does anyone know of a company that makes a stroker kit? (Bart)

Re: does anyone know of a company that makes a stroker kit? (Chrispy300)

Re: does anyone know of a company that makes a stroker kit? (Bart)

Re: does anyone know of a company that makes a stroker kit? (joukaishou813924)

Re: does anyone know of a company that makes a stroker kit? (John Dixon)

Re: does anyone know of a company that makes a stroker kit? (SuperHatch)

Re: does anyone know of a company that makes a stroker kit? (SuperHatch)

Re: does anyone know of a company that makes a stroker kit? (Bart)

Re: does anyone know of a company that makes a stroker kit? (Aus450zx)

Re: does anyone know of a company that makes a stroker kit? (joukaishou813924)

Re: (PyroTheGreen)

Re: (Mettler)

Re: (Bart)

Re: (Bart)

Re: (kingkilburn)

Re: (Mettler)

Re: (Chrispy300)

Re: (Mettler)

Re: does anyone know of a company that makes a stroker kit?

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