M96/7 crankshaft flexing experiences
11-07-2017, 06:39 AM
#1
User
Thread Starter
M96/7 crankshaft flexing experiences
I have not been reading this Internet site for long and didn't realise this forum existed until recently.
We are a UK Porsche specialist with years of experience in engine solutions and our own "IN HOUSE" precision machine shop - but would like feed back from this forum on any experiences of crankshafts flexing and failing through wear to main bearings starving big ends of oil pressure supply in racing.
By way of introducing our credentials - I posted the following on the Boxster, 996 and 997 forums a few days ago.
NOT SO FRAGILE THEN!
We hear so much about engine failures that I thought some good results might cheer owners up.
When we started racing the Boxster’s and 996’s 7 years ago everyone (including us) struggled with reliability over a full racing season.
Although we had rebuilt hundreds of road engines with 100% reliability – it took a lot of development to get the same engines racing round a circuit reliably.
This season in the UK’s top 3 Production based Porsche Championships our engines (built the previous winter) won all three Championships with a 100% reliability record – demonstrating that the small and subtle changes we make (combined with our rebuild skills) are worthwhile.
We also ran a podium based rewards scheme that has resulted in all 3 Champions earning labour free winter engine rebuilds – putting over £8000 back into the Sport.
Next season the Porsche Club Championship introduces the 3.8 engines and we expect this to follow the same set of challenges and a learning curve as the previous models.
Strictly controlled to standard road based internals (with a few minor allowances) this shows that progress has been made and that rebuilds to the right specification can create a very reliable engine.
Porsche Club GB class 1 Champion Mark McAleer 8 wins, 2 * 2nd , 1 * 3rd 100% reliability.
Porsche Club GB class 2 Champion Jake McAleer 9 wins, 2 * 2nd 100% reliability.
Porsche Club GB TEAM AWARD RVR 17 wins, 4 * 2nd 1 * 3nd 100% reliability.
BRSCC Boxster class 1 Champion Ed Hayes 15 wins, 4 * 2nd , 3 * 3rd 100% reliability.
Thanks
Barry Hart (technical director Hartech Automotive) AKA Baz www.hartech.org baz@hartech.org - 2 videos available on our web site
We are a UK Porsche specialist with years of experience in engine solutions and our own "IN HOUSE" precision machine shop - but would like feed back from this forum on any experiences of crankshafts flexing and failing through wear to main bearings starving big ends of oil pressure supply in racing.
By way of introducing our credentials - I posted the following on the Boxster, 996 and 997 forums a few days ago.
NOT SO FRAGILE THEN!
We hear so much about engine failures that I thought some good results might cheer owners up.
When we started racing the Boxster’s and 996’s 7 years ago everyone (including us) struggled with reliability over a full racing season.
Although we had rebuilt hundreds of road engines with 100% reliability – it took a lot of development to get the same engines racing round a circuit reliably.
This season in the UK’s top 3 Production based Porsche Championships our engines (built the previous winter) won all three Championships with a 100% reliability record – demonstrating that the small and subtle changes we make (combined with our rebuild skills) are worthwhile.
We also ran a podium based rewards scheme that has resulted in all 3 Champions earning labour free winter engine rebuilds – putting over £8000 back into the Sport.
Next season the Porsche Club Championship introduces the 3.8 engines and we expect this to follow the same set of challenges and a learning curve as the previous models.
Strictly controlled to standard road based internals (with a few minor allowances) this shows that progress has been made and that rebuilds to the right specification can create a very reliable engine.
Porsche Club GB class 1 Champion Mark McAleer 8 wins, 2 * 2nd , 1 * 3rd 100% reliability.
Porsche Club GB class 2 Champion Jake McAleer 9 wins, 2 * 2nd 100% reliability.
Porsche Club GB TEAM AWARD RVR 17 wins, 4 * 2nd 1 * 3nd 100% reliability.
BRSCC Boxster class 1 Champion Ed Hayes 15 wins, 4 * 2nd , 3 * 3rd 100% reliability.
Thanks
Barry Hart (technical director Hartech Automotive) AKA Baz www.hartech.org baz@hartech.org - 2 videos available on our web site
Last edited by bazhart; 11-07-2017 at 06:42 AM. Reason: ommissions
