4340 Billet Cranks

[petert 588]

Has anyone seen (or used) these billet cranks being sold on ebay?

 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...%3D1&_rdc=1

 

I sent them an email to see if they made anything in 86mm XU10 size:

 

"Hello Peter,

Thank you for your email.

We offer only 82mm stroke crankshafts for Peugeot at the moment. Price is 799GBP with FREE shipping cost to your address. And if you will also take the corresponding conrods with ARP2000 bolts, you will only need to pay another 200GBP to get one set shipped. The express time is 4-7 business days to your door.

If you confirm, please let us know your PayPal email and we will send you the inovoice back.

For the 86mm XU10 cranks to suit Peugeot 306, C4 etc., we could do custom orders for you as long as you have the sample of us to refer. The MOQ is 5 units for each stroke.

Let us know if you may interest in the custom order for cranks.

Best Regards,

maxspeedingrods"

 

Seems like a bargain to me if they're any good. It currently costs me approx. AUS$750 to have a standard CI crank crack tested, reground, balanced and nitrided. I don't have a need for any at present but if you're in the market for a new crank it might be worth someone organising a group buy.

[RossD 44]

Trouble is, there's the catch - "If they're any good"! I know quality is picking up, but I'm still sceptical about "Quality" when "Made in China" is on the box

I know a lot of OE stuff is made in China, but thats very different, with proper quality control and quality standards to be met. Aftermarket 'performance' components can be a real minefield.

 

I had a look at some of the cheap forged con-rods that are floating around from China - They looked fine but when a set where put on the scales they were nowhere near matched!

 

All imo of course

Edited September 21, 2010 by RossD

[engine killer 6]

I do have quite a number of parts fabricated in my mother land - China, most of them are very good and reliable.

 

RossD is also very correct, you will be betting/risking your money if you do not know very well about the supplier.

 

My current Mi's exhaust manifold (stainless steel) was from China too and it was far better than the one I bought from UK (iirc it was Pugspare), but the centre box and rear box were so s*it.

 

Want to have good products but do not know the supplier? You may have to visit/monitor them very frequently during manufacturing.

[Mandic 0]

When I was buying rods for my engine I was looking at all the available options and noticed that design of the rods offered on the market is remarkably similar.

 

After some time I have sourced the supplier, Maxspeedingrods. It seems that they provide base for loads of different "rod manufacturers", where they only fine machine the rest to suit required dimensions. Eagle rods for example come for them.

 

Hondatech guys say that material wise rods are ok, it's final machining that's problematic and like box of chocolates, some are ok, some vary by a lot. They seem to fail due to improper clearances rather than material strength.

 

Don't know about cranks however.

 

But if You order slightly over sized one and them machine it yourself, it could turn out as a good deal.

 

 

Cheers

 

Ziga

[crf450 0 1 Cars]

I've never heard of anyone making cranks out of 24t and why would you need a billet crank anyway?

Edited September 24, 2010 by crf450

[petert 588]

Plenty of crank manufacturers make cranks out of 4340, even if you aren't into racing they're cheap as chips.

[crf450 0 1 Cars]

Oh, I thought EN40 was the only steel that retained it strength when cut across the grain. Maybe 24 does aswell.

[Mandic 0]

Have read somewhere that EN40, besides being expensive, requires very long nitriding process, like 90hrs or so, which makes them very expensive. Proper 24 is a cheaper, but still very good option.

 

 

Cheers

 

Ziga