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Home > Help Needed / General Tech Chat > Cooper s conrods

giannoutsos

166 Posts
Member #: 8952
Advanced Member

Athens Greece

Good morning all,
After finding out that that my worked crankshaft has a crack in it so obviously I can't use it, I bought a brand new one from a friend that has smaller big ends so I need cooper s con rods.
So which aftermarket con rods are good from the cheaper ones on eBay?
Does anyone have a set for sale?
Thanks in advance
John


minimole23

4299 Posts
Member #: 1321
Post Whore

Wiltshire

Specialist components for something reasonably priced, and good quality. Wouldn't bother with eBay, unless you know the source. False economy to risk it.

Edited by minimole23 on 25th Sep, 2016.

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding


slater

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1030 Posts
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Suffolk / Birmingham

The eBay rods all come from the same source as far as I can tell. Somone did do a weight comparison and they were heavier than SC but more than good enough for anything but an all out race motor. I will be using a set in my next engine for sure.


gr4h4m

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4890 Posts
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Chester

Well the eBay rods from Williams come in the same box as SC's...... and have genuine arp bolts in a packet.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


giannoutsos

166 Posts
Member #: 8952
Advanced Member

Athens Greece

Thanks for the answers,
I agree with Graham most of them look the same, should come from the same supplier.
I would love to hear from people that have used them.
John


fastcarl

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6962 Posts
Member #: 507
Fastest A Series Mini in the World

leeds/wakefield.

i have a set of Arrow, new unused 10 years old still in the box from Arrow,

with S big ends,

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE


matty

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8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

I know of a few sets fitted to mini se7en race engines, been going strong for a couple of seasons now and they regularly spin to 9k on track.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi


giannoutsos

166 Posts
Member #: 8952
Advanced Member

Athens Greece

Which one are you talking about Matty, can you be more specific please.
John


gr4h4m

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4890 Posts
Member #: 1775
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Chester

The Williams 6" rods without bolts are 532g

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


matty

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8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

I know a Williams set is, and the set that came out were of another make, I can't remember exactly what make they were now though, they were only removed due to a spun bearing and heat discolouration on the BE.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi


slater

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Suffolk / Birmingham

Im pretty sure they all originate from the same place. Someone was advertising on ebay not long ago to make them to your spec. (size wise at least) im pretty sure you just send off your sizes to china and they come back with your name lasered on the side but are all made in the same place out of the same stuff!


tadge44

3004 Posts
Member #: 2500
Post Whore

Buckinghamshire

MG Midget rods are the right big end size and pretty tough - if you can find them.

The ones in my car see 7k + and 17psi and so far so good.


giannoutsos

166 Posts
Member #: 8952
Advanced Member

Athens Greece

Thanks for all the answers, Slater I agree with you


Sprocket

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11046 Posts
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Preston On The Brook

I believe the spun bearing may be the real issues with these rods, but id expect any decent engine builder would check the bearing housing for size and roundness first. Turbodave16v linked to a thread on another forum and one mans findings highlighted the differences for your money, but it involved the possibility of a spun big end

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


giannoutsos

166 Posts
Member #: 8952
Advanced Member

Athens Greece

Do you have the link Sprocket?
Would make an interesting read.
Thanks
John

Edited by giannoutsos on 26th Sep, 2016.


matty

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8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

The spun bearing on the engine I stripped, was down to 15mins of racing with no oil pressure, and 4thou clearance on the mains. 😂 you could literally rattle the crank...made good power though! (not my work).

I think the are essentially the same rods with different names, but these two sets were slightly different, very subtle but you could tell they were made differently due to a few of the profiles and surface finish on the non machined surfaces.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi


Sprocket

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11046 Posts
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Preston On The Brook




On 26th Sep, 2016 giannoutsos said:
Do you have the link Sprocket?
Would make an interesting read.
Thanks
John


Interestingly, most people seem to suggest that "cheap Chinese" means 'poor quality'. I'd say that has been confirmed to be true at the very least regarding the dimensional accuracy. I'd be tempted if it was for something as simple as a longer rod or a Cooper S big end for a stroked 1430 rather than a lighter rod for a balls out screamer.........

Considering such a 'heavy' rod as these "cheep Chinese" in a balls out screamer, you really aught to re assess your decision making paradigm before anything else. I said it before, and I'll say it again; That is not to say these cheap Chinese rods don't work. If you have a valid justification to use such 'heavy' rods, by all means do so, but not just because it's fashionable.

Measure measure measure..................


On 21st Jan, 2014 TurboDave16V said:
I was a bit bored, so looked on interwebs for maxpseeding rod info.

http://www.mgexp.com/phorum/read.php?41,1826191

http://forums.mg-rover.org/showthread.php?t=406766


Both of these links contain interesting information; the MGExperience site talks about billet machined rods made in England that were embarassing quality with the BE being interpolated on a CNC instead of finish honed to size!!!! WTF!!!!


The MGRover site mentions Dave Andrews (respected K-series tuner) uses the maxpseeding rods, and that initially the rods had a few little issues that made them "not as good as they could have been", but with feedback from DA, resulted in a modifed design that no-one has any reported failures on...

I'd say these could be worth a sniff. The interesting (or should that be blatantly obvious) thing is that all ebay, SC, and "others" rods all look the same.

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


Sprocket

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11046 Posts
Member #: 965
Post Whore

Preston On The Brook

I can beat that haha. Center main bearing failure..... pistons were touching the head *Clapping* I drove that home and oil pressure was still acceptable. Had a little bit of a knock though *Rofl!*


On 26th Sep, 2016 matty said:
The spun bearing on the engine I stripped, was down to 15mins of racing with no oil pressure, and 4thou clearance on the mains. 😂 you could literally rattle the crank...made good power though! (not my work).

I think the are essentially the same rods with different names, but these two sets were slightly different, very subtle but you could tell they were made differently due to a few of the profiles and surface finish on the non machined surfaces.

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


Sprocket

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11046 Posts
Member #: 965
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Preston On The Brook

Come to think about it, there's a similar situation going on in the oak furniture market. It all looks the same, is made of Oak and comes from China *Rofl!*

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


fastcarl

User Avatar

6962 Posts
Member #: 507
Fastest A Series Mini in the World

leeds/wakefield.




On 26th Sep, 2016 Sprocket said:
Come to think about it, there's a similar situation going on in the oak furniture market. It all looks the same, is made of Oak and comes from China *Rofl!*



You do of course mean " very small pieces of oak" glued together,lol *happy**happy*

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE


Sprocket

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11046 Posts
Member #: 965
Post Whore

Preston On The Brook

They look ok and some are better than others....... Like most things Chinese...... Same Shit Different Day

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


jonny f

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2091 Posts
Member #: 9894
Post Whore

Dorking

Maxspeedingrods seem to make most of them by the looks of it.

Always see them on eBay.

http://www.maxspeedingrods.co.uk/h-beam-co...in-conrods.html


fastcarl

User Avatar

6962 Posts
Member #: 507
Fastest A Series Mini in the World

leeds/wakefield.

Forged my fucking arse. and that's not an offer ,lol

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE


gr4h4m

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4890 Posts
Member #: 1775
Post Whore

Chester

carl why do you say that?

As a side note, I would guess most of us wouldn't be posting on here if it wasn't for China's IT manufacturing...

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


matty

User Avatar

8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

I was very sceptical at first with these rods, and how the tolerances would be. I had the rebush the Little ends for 998 pins, and the machining was cock bollock on, all round and better than the Sainz rods we used to build engines and these are expensive rods!

On 26th Sep, 2016 Sprocket said:



On 26th Sep, 2016 giannoutsos said:
Do you have the link Sprocket?
Would make an interesting read.
Thanks
John


Interestingly, most people seem to suggest that "cheap Chinese" means 'poor quality'. I'd say that has been confirmed to be true at the very least regarding the dimensional accuracy. I'd be tempted if it was for something as simple as a longer rod or a Cooper S big end for a stroked 1430 rather than a lighter rod for a balls out screamer.........

Considering such a 'heavy' rod as these "cheep Chinese" in a balls out screamer, you really aught to re assess your decision making paradigm before anything else. I said it before, and I'll say it again; That is not to say these cheap Chinese rods don't work. If you have a valid justification to use such 'heavy' rods, by all means do so, but not just because it's fashionable.

Measure measure measure..................


On 21st Jan, 2014 TurboDave16V said:
I was a bit bored, so looked on interwebs for maxpseeding rod info.

http://www.mgexp.com/phorum/read.php?41,1826191

http://forums.mg-rover.org/showthread.php?t=406766


Both of these links contain interesting information; the MGExperience site talks about billet machined rods made in England that were embarassing quality with the BE being interpolated on a CNC instead of finish honed to size!!!! WTF!!!!


The MGRover site mentions Dave Andrews (respected K-series tuner) uses the maxpseeding rods, and that initially the rods had a few little issues that made them "not as good as they could have been", but with feedback from DA, resulted in a modifed design that no-one has any reported failures on...

I'd say these could be worth a sniff. The interesting (or should that be blatantly obvious) thing is that all ebay, SC, and "others" rods all look the same.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

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