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itiejim

H beam con-rods - forged - seen these?

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Chinese huh. Land of slave labour and cheap production! Direct from manufactoring base I imagine.

 

What can you say. Maybe ask for a weight, they look meaty.BIG bolts and lots of extra material that could be slung off.

 

Check the feedback in a few weeks?!  ;)

 

Certainly cheap.

 

You pay 198UKP+VAT EACH for Carillo rods in the UK.

 

e7b9_10.JPG

 

Triumph_Spitfire_1500__GT6___TR6_H_Section_Conrod.jpg

 

GT is designing some Titanium ones atm, almost ready for production. These have been designed to go down the bore and make a 2.4 on a new crank; from a 2000cc engine! I didn't get all the details on this.

 

Probably under 1/2 the weight of steel, but as ever, not cheap for this stuff. Awesome potential though in a "racer".

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The eBay guy sells the same design for dozens of modern cars.  Inc Ferrari 308!

 

If yu want others experinece, try posting on sites that deal with those cars?

 

John

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Suprised these companies haven't got into "cracked rods"...

 

Modern engines now come with 1 piece rods that have been "cracked" to make the end cap. Basically just snapped off.

 

Basically instead of a smooth area between the cap and body and a retaining tube etc the rods are "cracked" in half.

 

This gives a PERFECT immobile, fret free connection that cannot "wriggle"...Why cause if you crack something it will fit back together perfectly and give a MUCH stronger joint than a conventional compression joint also a MUCH greater effective surface area on the connection and improved strength...against/opposed to OLD school methods of a smooth compression jointing with some form of tube for location..

 

Stock production on Modern Fords etc.

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Suprised these companies haven't got into "cracked rods"...

 

Modern engines now come with 1 piece rods that have been "cracked" to make the end cap. Basically just snapped off.

 

Basically instead of a smooth area between the cap and body and a retaining tube etc the rods are "cracked" in half.

 

This gives a PERFECT immobile, fret free connection that cannot "wriggle"...Why cause if you crack something it will fit back together perfectly and give a MUCH stronger joint that a convension compression joint also a MUCH greater effective surface area on the connection and improved strength...against/opposed to OLD school methods of a smooth compression jointing with some form of tube for location..

 

Stock production on Modern Fords etc.

 

Hmmm, powder forging...... interesting process, but is it really strong enough for the top line high strength stuff?

 

Nick

 

 

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I'm not sure how many manufacturers powder-forge (sinter) their rods.  Toyota have been for some time (earlys 80's).

 

THis is quite interesting (ads are irritating though)

 

http://www.allbusiness.com/professional-scientific/scientific-research-development/155655-1.html

 

and this

 

http://www.epma.com/rv_pm/PM%20Process/PM%20PROCESS%20HOMEPAGE.htm

 

and this

 

http://www.gknsintermetals.com/images/con_rods.pdf

 

It seems that the answer is 'lots' or even 'most'.  I think the reason that the specialists like Carillo etc don't do this is a0. the powder forging kit is a serious investment and B). Ford have patented the cracking process.  (Although b is odd as I think I remember seeing a video at school in the early 80s about powder forging which even mentioned cracking things, albeit not with rods....)

 

Nick

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People could be in for a shock.

They probably don't fit down the bore.

 

It's extremely difficult to make a small rod that goes down a bore as small as 75mm, that's why they split them at 45 deg originally.

Same problem on the IMP motor

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That wouldn't be right, somebody selling something that doesn't fit  ;)

 

Joking aside, I would like to think they have done some trial fitting.

 

Regarding weights, I found the weights for the rods fitted to my engine, they are 670g so quite a good saving at 506g (if they fit).

Think standard rods must be around the 700g mark. (Edit just read in Saloon section AT has them at 685g)

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Having already seen a few steel rods, probably our friend Steve has it right. PAUTER would be a co that goes to the trouble of ensuring they fit.

 

Seeing as that guy on ebay is selling rods like "one size fits all" for any make of car, I doubt very much he went to the trouble of checking they fit.

 

The big problem is;- if you fit a large bolt, then logically with that size of journal, and proper design THEY WON'T FIT, because quite simply there isn't room.....unless of course you bore it out to 80 like I did.

Even then it's a REALLY tight fit for a large bolt type rod.

 

Obviously I looked into this before adopting a different solution.

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I have asked them if they will send a part over for trial fitting, I'll keep you informed.

 

That would be interesting - pehaps you can get it PMI'd as well and we can see what kind of monkey metals they're making them from too...

 

Nick

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