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Gtir Motorsport club » General Discusion » Gtir related Discussion » testament to the strength of the sr20 crank

testament to the strength of the sr20 crank

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1 testament to the strength of the sr20 crank on 25th November 2015, 9:47 pm

GTI-R US

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We have a customers car in at the moment which was delivered to us on a low loader for engine rebuild and other work

The car did actually start and drive but the bigend was clearly in a very poor state as the knock was lets say extremely loud so it had been driven like that for some time amazingly enough.

Anyway we pulled the engine and stripped her down to see how bad the damage was and in a nut shell the bearing had spun and partially welded itself to the crank but it went way beyond that Laughing
the welded part had long worn off with the continued use of the car.

Take a look at these photos and measurements then you will see just how badly this had worn.
How on earth it never through a rod through the block, snapped the rod bolts, broke the rod or snapped the crank I really just don't know Shocked
but its a testament to just how strong the parts can be for these little cars.

vertical measurement of the id of rod 53.25


lateral id 57.11mm


The bad rod compared to a good stock rod, note the ovality of the rod by looking at the edges around it where it has been worn away


the spun big end crank journal 45.67


was that badly worn it no longer looked worn lol


And finally to prove this was a stock unground crank heres a measurement from one of the other good journals



Now minus the lesser figure of the rod being 53.25 from the worn crank journal and it gives you a whopping clearance of.............7.42mm Shocked

The worst ive ever actually seen with the car still running lol

Anyway open to offers for this crank and rod which are a true one off rarity so no silly offers please Very Happy



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2 Re: testament to the strength of the sr20 crank on 25th November 2015, 9:53 pm

pulsarmoley

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Stick some EP90 in there, that will take up the clearance piss taker


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3 Re: testament to the strength of the sr20 crank on 25th November 2015, 9:57 pm

GTI-R US

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Bodger you need STP to do the job properly, now go stand in the corner Laughing


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                                            'In association with'
                           Torque Of The South Motorsport
             Dyno Developments 4wd rolling road & Performance Tuning Centre
                                          'Services provided'
Wheelchair conversions, Forged engine rebuilds, Dyno power runs & Ecu mapping, Dyno diagnostics, Sonic injector cleaning, Performance upgrades,
Full Race setup's, Servicing, Mot's, Restorations, conversions, fabrication, Worlds largest stockist of quality used parts for Gtir
http://www.gti-r-us.co.uk www.force500.com

4 Re: testament to the strength of the sr20 crank on 25th November 2015, 9:59 pm

pulsarmoley

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I'll grab me dunce hat... jocolor


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5 Re: testament to the strength of the sr20 crank on 25th November 2015, 10:01 pm

gtir_woody

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Haha true one off rare GTIR item you have there

6 Re: testament to the strength of the sr20 crank on 25th November 2015, 10:35 pm

Cosmic73

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I wonder how much longer it couldve ran for before it actually shat itself to death?
Very Happy Very Happy Very Happy

7 Re: testament to the strength of the sr20 crank on 25th November 2015, 10:38 pm

pulsarmad20

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bob this looks and sound like my last engine lol i did england to france and france to eng in it plus another 4000 kms if the clutch fork didnt go i wouldnt of pulled it apart and bought a forged engine lol for a little longer pmsl i must take it apart and see wats happend inside one of thease days as well as a goosed gearbox i have getting a collection of broken stuff lol

8 Re: testament to the strength of the sr20 crank on 26th November 2015, 3:41 am

johnny gtir

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affraid affraid  Crazy

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