[Fot] Racing rod design

[TR4 Tony]

Hi all

The issue for me with my rally TR4 is reliability in a variety of temperature and stress conditions, across the full rev range and with all the non engine tortional loadings that occur through whiplash in the drivetrain caused by really pushing hard. 

I had the same set of carillos in BST82B for about 5 years before I bent one through a valve failure so they are not infallible by any means but in those 5 years they did a HUGE amount of work at big revs with the engine running from 2500 rpm all the way through to about 8000rpm ALL day and sometimes ALL night. 

 I have literally revved that engine out of orbit in the most horrible conditions and failures are so rare. With about 140,000 rally miles done so far in the car as a package the engine is the most reliable element of the whole deal and thats because it's got a load of expensive bits in it that are designed to be pushed hard, together with scheduled pull outs and maintenance and the help of some clever people when I need it. 

I don't think there is much better out there that I can get my hands on at non millionaire money. Carillos still have my vote. 

Regards

Tony 

Sent from my iPhone

> On 23 Jul 2015, at 16:53, Christian Marx <tr4racing at googlemail.com> wrote:
> 
> The interesting thing with rods is, how long does it. 
> 1 year , 3 years , 10 years? 
> My rods did it 5 years.
> 
> Am 23.07.2015 16:41 schrieb "John Hasty" <jhasty at mhc-law.com>:
>> Gee Whiz….you guys know a h- - - of a lot more about this than me, but I reason that if Manley etc. make a rod that withstands the rigors of a 800+ hp American V8 turning upwards of 9000 rpm and it costs ½ of what P and C are charging it makes sense to use them…..
>> 
>>  
>> 
>> John H. Hasty | MULLEN HOLLAND & COOPER P.A.
>> 
>> Attorney at Law
>> 
>> 301 South York Street  (zip: 28052) 
>> P.O. Box 488 
>> Gastonia, NC 28053-0488 
>> Telephone: 704.864.6751 | Facsimile: 704.861.8394 
>> JHasty at mhc-law.com | www.mhc-law.com
>> 
>>  
>> 
>> From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of John Styduhar
>> Sent: Thursday, July 23, 2015 9:59 AM
>> To: Christian Marx; Triumph 'Friends of Triumph
>> Subject: Re: [Fot] Racing rod design
>> 
>>  
>> 
>> Pauter has been making this design for almost 30 years with zero cold failures.  If it were a poor design they would have changed it out of necessity.  According to a Pauter rep., the main reason they started manufacturing their own rods in the first place was due to the fact that the H beam and I beam rods they were using couldn’t put up with what they were throwing at them with their turbo charged 4cylinder engines.   
>> 
>> If you spin a rod bearing, eventually you will break anything. 
>> 
>>  
>> 
>>  
>> 
>> On Thu, Jul 23, 2015 at 9:49 AM, Christian Marx <tr4racing at googlemail.com> wrote:
>> 
>> I saw the pictures of Pauter.
>> This type has no material were it needs and too much were it doesn't make sense.  Maybe for very short rods usable.
>> 
>> Am 23.07.2015 14:46 schrieb "John Styduhar" <johnstydo at gmail.com>:
>> 
>> The Pauter design is a cross-beam (an inside-out H beam) not an x-beam and shares H-beam design properties because of this. 
>> 
>>  
>> 
>> On Thu, Jul 23, 2015 at 3:34 AM, MadMarx <tr4racing at googlemail.com> wrote:
>> 
>> Today I had a look to a book called race car design.
>> 
>> It also contains engines, and as detail rods and their designs. I, H, blade – no x-beam (seems they never got the idea that someone could get the idea of an x-beam rod)
>> 
>>  
>> 
>> They said that F1 uses I-beam rods because they have the best stiffness to weight ratio.
>> 
>> Also German DTM-cars use I-beam rods.
>> 
>> https://en.wikipedia.org/wiki/Deutsche_Tourenwagen_Masters
>> 
>>  
>> 
>>  
>> 
>> Cheers
>> 
>> Chris
>> 
>> 
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