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Discussion Starter #43
Hi Tony ,

The engine is mapped to 80% WOT and has put out 300bhp at the rear wheels at part load.

The problem has been with the rear wheels spinning up causing an issue with the mapping, despite have the rollers reknurled.

We are getting there and I'll update in due course.

D
 

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Hi David,

Your car should easily make 325-330 whp.
Hope everything works flawlessly.

Cheers,
Taffy
 

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Discussion Starter #47
Hi dalius ,

I had the motor up and running , as the video shows .

The 2 ring piston design is not suitable for our purposes i.e. A quick roadgoing car .

We are currently awaiting a revised 3 ring piston design .

The car was incredibly quick and powerful with the 2 ring pistons , but snapped a ring very quickly , indicating that a more reliable and long term solution is required.

D
 

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Hi dalius ,

I had the motor up and running , as the video shows .

The 2 ring piston design is not suitable for our purposes i.e. A quick roadgoing car .

We are currently awaiting a revised 3 ring piston design .

The car was incredibly quick and powerful with the 2 ring pistons , but snapped a ring very quickly , indicating that a more reliable and long term solution is required.

D
What do you mean by snap the piston ring? it broke in 2 parts and started overheating?
 

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Discussion Starter #51
A piston ring broke and allowed oil to get up the bore where it was burnt and caused smoking and all of the unwanted things things that happen when a piston ring breaks .
 

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Pioneers often face bumps in the road and I'm sorry to hear that this revolutionary project faces challenges. I hope it moves forward, and all the best with it.
 

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Discussion Starter #53
No doubt , Matty .


We knew , prior to taking on this build , that we were the first E34 M5 specialists to take on the project and thus expected teething problems.


D
 

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A piston ring broke and allowed oil to get up the bore where it was burnt and caused smoking and all of the unwanted things things that happen when a piston ring breaks .


What else happens when a ring breaks?


Sent from my iPhone using Tapatalk
 

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Discussion Starter #55
What else happens when a ring breaks?


Sent from my iPhone using Tapatalk
Any number of things can happen.

In this instance , the engine was stripped and the cause of the failure attributed to the piston design .

Thus a 3 ring piston has been specced and we are currently awaiting delivery.

D
 

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Yeah... hows this going now, awesome project David, really enjoyed reading about this one, and look forward to seeing it and hearing it sometime.
 

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Any update on this beast's life ?
 

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Discussion Starter #60
Hola chaps and apologies for the delay in updating .


Anyone who knows me outside of cyberspace knows how busy I've been .


Meanwhile , PPM have finally redesigned the pistons to incorporate 2 compression rings and one oil control ring . The compression ratio will be reduced slightly as a result .


We are just awaiting delivery of the revised pistons and this show will be back on the road .


D
 
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