# turboSHO engine teardown W/pics

**URL:** <https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335>\
**Category:** Builds\
**Created:** [May 13, 2008, 4:52am UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335 "2008-05-13T04:52:05Z")\
**Posts on this page:** 1\
**Showing post:** 59

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**Author:** ![HotRodKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hotrodkid/32/7609_2.png) [@HotRodKid](https://forums.speedlife.net/u/HotRodKid)\
**Post date:** [June 13, 2008, 2:00pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/59 "2008-06-13T14:00:00Z")

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well, i got an answer about the knock sensor, but i dont think its much of an answer. you were asking about how “quick on the draw” the sho ecu is, instead i got an answer about what the sho does “after the draw” so to speak

> [@So my sister was fired...need some advice](https://forums.speedlife.net/t/so-my-sister-was-fired-need-some-advice/45968/56):
>
> Here’s the retard rate from the DU41 PCM.
> 
> ![http://www.supermotors.net/getfile/643788/fullsize/du41-ks-retard-rate.jpg](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/3X/8/6/86b55920d342b8545d0e1a5d3867d4e275f589b2.jpeg)
> 
> And here is the advance rate from the DU41.
> 
> ![http://www.supermotors.net/getfile/643789/fullsize/du41-ks-advance-rate.jpg](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/3X/8/c/8c2e474536c8bb81de576b42c7d7cd6fa44d2d46.jpeg)
> 
> As you can see the KS are most aggressive at the peak torque range. This is where you will get the highest chance of knock. Also once the KS kick in the return of timing to before event settings is really slow. Which means once knock is seen you have lost most of your advancement and will not get it back in time for the next shift.
> 
> Looking at the B9B1 strategy it is just about toothless and does not really do much.
> 
> ![http://www.supermotors.net/getfile/643790/fullsize/b9b1-ks-retard-rate.jpg](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/3X/a/a/aa748b8ab4abfef282c451dbf3cc50c73e05a8af.jpeg)
> 
> ![http://www.supermotors.net/getfile/643791/fullsize/b9b1-ks-advance-rate.jpg](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/3X/1/0/10581af0cfa73bca08a9a6a58f4fe530170966b3.jpeg)

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