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This Is Why I Love These 16 Valve Engines


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#61 MIGLIACARS

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Posted 03 January 2018 - 06:30 PM

good point, the assumtion I am making is the S damper is suited to engines similar to the S engine, ie reging upto around 7500 rpm, but that said the S crank differs substantialy from the std crank so god know what it is doing in terms of vibrations.... so hence my thinking of just stuff a viscous damper on and be done with it.

 

just for a bit of fun ive drawn up the overlap of all the large bore crank configs that sprang to mind.

 

attachicon.gifcranks.jpg

Ive never heard of a 91mm stroke has anyone else 



#62 Spider

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Posted 03 January 2018 - 06:43 PM

Ive never heard of a 91mm stroke has anyone else 

 

 

If I recall, they were used to stretch a 1275, together with a 74.4 mm Bore to 1600 cc.  I've not seen or driven one in this configuration, however from several people, they say they are not great and make no more power than at circa 1480 cc and don't rev as well. Perhaps these days though, a 1600 bottom end topped with a 16 V head might be another story. 

 

Some grinding of the Crankcase and Gearbox Case is needed to get clearances too.



#63 mini13

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Posted 03 January 2018 - 07:01 PM

Yep,91 mm stroke and 74.7mm bores, making 1596, although I think I remember an article many years back where aldon did a 91.somthing crank to get somthing like 1608cc. Definitely not sure though

#64 Spider

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Posted 22 April 2018 - 09:39 PM

Just found another to add to this fine collection,,,,,

 



#65 MIGLIACARS

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Posted 23 April 2018 - 07:31 AM

sounds so sweet.



#66 InnoCooperExport

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Posted 24 April 2018 - 01:03 PM

That sounds fantastic! 



#67 mini13

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Posted 25 April 2018 - 11:42 AM

sublime, the westlake 8 port was ( still is) i great head.



#68 Spider

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Posted 18 August 2018 - 09:02 PM

Another to add to this collection :D

 



#69 mk1leg

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Posted 19 August 2018 - 07:35 PM

Crafted Classics Job stunning BMW head conversion its only been finished 3 weeks ago



#70 MIGLIACARS

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Posted 20 August 2018 - 08:47 AM

good point, the assumtion I am making is the S damper is suited to engines similar to the S engine, ie reging upto around 7500 rpm, but that said the S crank differs substantialy from the std crank so god know what it is doing in terms of vibrations.... so hence my thinking of just stuff a viscous damper on and be done with it.

 

just for a bit of fun ive drawn up the overlap of all the large bore crank configs that sprang to mind.

 

attachicon.gif cranks.jpg

Does any body have the stroke of the s/a crank



#71 Spider

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Posted 20 August 2018 - 08:53 AM

 

good point, the assumtion I am making is the S damper is suited to engines similar to the S engine, ie reging upto around 7500 rpm, but that said the S crank differs substantialy from the std crank so god know what it is doing in terms of vibrations.... so hence my thinking of just stuff a viscous damper on and be done with it.

 

just for a bit of fun ive drawn up the overlap of all the large bore crank configs that sprang to mind.

 

attachicon.gif cranks.jpg

Does any body have the stroke of the s/a crank

 

 

69.8 mm.



#72 MIGLIACARS

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Posted 20 August 2018 - 09:16 AM

 

 

good point, the assumtion I am making is the S damper is suited to engines similar to the S engine, ie reging upto around 7500 rpm, but that said the S crank differs substantialy from the std crank so god know what it is doing in terms of vibrations.... so hence my thinking of just stuff a viscous damper on and be done with it.

 

just for a bit of fun ive drawn up the overlap of all the large bore crank configs that sprang to mind.

 

attachicon.gif cranks.jpg

Does any body have the stroke of the s/a crank

 

 

69.8 mm.

 

as this is A plus size big ends can you stroke it down if so to what!!!



#73 mini13

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Posted 20 August 2018 - 09:30 AM

the generally accepted amount is 2.7mm change in stroke from the offset grind, so 67.1mm



#74 Spider

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Posted 10 December 2019 - 06:15 PM

Just found another to add here :D

https://video.fsyd4-...5fa&oe=5DEB7C6C

 



#75 beardylondon

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Posted 10 December 2019 - 08:27 PM

Link not working?






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