# turboSHO engine teardown W/pics **URL:** \ **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:** 20\ **Page:** 3
**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 8, 2008, 9:57am UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/41 "2008-06-08T09:57:29Z")
[![http://img.photobucket.com/albums/v473/hotrodkid/th_PICT2356.jpg](http://img.photobucket.com/albums/v473/hotrodkid/th_PICT2356.jpg)](http://smg.photobucket.com/albums/v473/hotrodkid/?action=view¤t=PICT2356.flv) ---
**Author:** ![matter](https://avatars.discourse-cdn.com/v4/letter/m/97f17d/32.png) [@matter](https://forums.speedlife.net/u/matter)\ **Post date:** [June 8, 2008, 11:54am UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/42 "2008-06-08T11:54:06Z")
I want a video of you pulling to at least 7k ---
**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 8, 2008, 12:03pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/43 "2008-06-08T12:03:40Z")
i had one … but my camera saved it as only the first 2 frames. shitty i know ---
**Author:** ![ubengineering](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ubengineering/32/5171_2.png) [@ubengineering](https://forums.speedlife.net/u/ubengineering)\ **Post date:** [June 8, 2008, 7:32pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/44 "2008-06-08T19:32:22Z")
very nice work, saw this at work today t-up ---
**Author:** ![rj-92](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/rj-92/32/7310_2.png) [@rj-92](https://forums.speedlife.net/u/rj-92)\ **Post date:** [June 8, 2008, 7:42pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/45 "2008-06-08T19:42:10Z")
glad to see its up and running. ---
**Author:** ![reliant\_turbo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/reliant_turbo/32/7189_2.png) [@reliant\_turbo](https://forums.speedlife.net/u/reliant_turbo)\ **Post date:** [June 8, 2008, 8:00pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/46 "2008-06-08T20:00:34Z")
cool. did you richen it up in boost yet 😉 another question. sorry :). they way the ecu displays knock… has anyone done research in the SHO community to see how the ecu deals with knock. reason i ask. ive seen naturally aspirated ecus only indicate knock once _audible_ knock is detected… ie you hear knock in the car (ie bad) and then the ecu pulls some timing and indicates knock. all turbo ecus that i know of, are much more sensitive to know and indicate knock and pull timing far before you ever hear it with your ears. just something to think about seeing the condition of your old pistons. seeing this thread makes me wish i had my sho still… but then i think of all the hassles of dealing with SHO specific stuff. 🙂 Brian ---
**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 9, 2008, 3:36pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/47 "2008-06-09T15:36:34Z")
not really sure if anyones looked into how the sho deals w/ knock, but i also dont think that anyones had a problem with the ecu not detecting knock now im wondering if we should swap in a turbo cars’ knock sensor and see if it changes anything. and for that matter datalog the stock sensor to make sure tweecer is displaying it correctly also of note, i was poking around looking at the other pistons off the old engine, i think i looked at 3 of them, and none of them had cracked lands or scuffing on the sides, and since i grabbed the only one that was “clean” on the top … the oddball if you will … im wondering if maybe its the only with cracked lands for some reason guess i gotta check the last 2 to find out for sure but hey … on with the pics ! new cams, notice that with the smaller base circle theres no ramp on the cams … the leading edge of nose itself is what takes up valve train slack AS it starts to open the valve ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2333.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2333.jpg) ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2334.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2334.jpg) the associated bucket, no signs of damage, at most theres “slightly more wear” where the shim seats around the edge, but definantly not a large amount of wear ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2340.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2340.jpg) theres the knocking noise ! cam geat was still fully seated against the cam, and the bolts still had WAAAY more thread left. bolt holes still had all their thread and threaded in without any problem what-so-ever. the knocking noise was the gear rotating and tapping the bolts, no signs of the cam gear having rocked away from the cam ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2344.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2344.jpg) valve cover back on … yay ! ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2346.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2346.jpg) alex passed out on some cardboard while i work … boooo … at least hes not using the gas can as a pillow anymore … ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2348.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2348.jpg) intake back on … yay again … i forget to tighten the intake bolts, booo again ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2349.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2349.jpg) hey look, a sho engine in something else !!! (dont bother trying to poke around for the rest of the pics, lol) ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2362.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2362.jpg) ---
**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 9, 2008, 4:06pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/48 "2008-06-09T16:06:43Z")
better pic of the intake on … and yes thats a sledge hammer holding the hood up … last line of post 46 in this thread (reliant\_turbos’ reply) should explain why a sledge is used, lol and yes thats the burnt engine cover and DIS module being reused … battle scars are sexy 🙂 ![http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2351-1-1.jpg](http://img.photobucket.com/albums/v473/hotrodkid/sho%20-%20new%20cams/PICT2351-1-1.jpg) ---
**Author:** ![LZ1](https://avatars.discourse-cdn.com/v4/letter/l/7ab992/32.png) [@LZ1](https://forums.speedlife.net/u/LZ1)\ **Post date:** [June 9, 2008, 4:07pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/49 "2008-06-09T16:07:45Z")
Team bootleg does it again :tup: ---
**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 9, 2008, 4:09pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/50 "2008-06-09T16:09:59Z")
someone tell alex that the turbo sho needs MOAR NAWS ! and by more, i mean “installation” ---
**Author:** ![reliant\_turbo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/reliant_turbo/32/7189_2.png) [@reliant\_turbo](https://forums.speedlife.net/u/reliant_turbo)\ **Post date:** [June 9, 2008, 6:06pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/51 "2008-06-09T18:06:07Z")
> [@HotRodKid](#): > > not really sure if anyones looked into how the sho deals w/ knock, but i also dont think that anyones had a problem with the ecu not detecting knock > > now im wondering if we should swap in a turbo cars’ knock sensor and see if it changes anything. and for that matter datalog the stock sensor to make sure tweecer is displaying it correctly keep the stock knock sensor. it is matched to the ecu and to the engine knock frequency characteristics. its just the level (voltage) that the ecu determines that is knock that is in question. you could make a detonation can/earmuffs setups and listen closely and watch tweecer to see if you are getting indicated knock. if you dont hear barely anything in the earmuffs or the slightest tick and tweecer indicates knockm then the system is working to a safe level. Brian ---
**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 9, 2008, 6:27pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/52 "2008-06-09T18:27:00Z")
well the stock sensor mounts right next to a steel plate in the valley … a rather large steel plate at that … could easily replicate it with some 3/8 plate , throw some threaded holes into it, make a wiring harness, and datalog the results from the sensors while listening w/ the ear muff setup i can do 4 extra sensors at once through tweecer (get plotted right to the tweecer graph) or i can do 8 extra sensors to a seperate graph 🙂 ---
**Author:** ![reliant\_turbo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/reliant_turbo/32/7189_2.png) [@reliant\_turbo](https://forums.speedlife.net/u/reliant_turbo)\ **Post date:** [June 10, 2008, 10:02am UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/53 "2008-06-10T10:02:24Z")
that might work but its hard to datalog knock sensors without an oscilloscope or something with a really high sampling rate. i dont know about all ecus but i know that turbo chrysler ecus have additional circuitry to “store” the peak of the knock signal using a capacitor after every ignition pulse so that the ecu can easily read it without having to deal with the small window of time when the knock occurs and then it clears the capacitor to ground before the next ignition cycle. here is a diagram. [http://www.squirrelpf.com/bucar/ecu%20stuff/85\_86\_87\_detonation\_diag.gif](http://www.squirrelpf.com/bucar/ecu%20stuff/85_86_87_detonation_diag.gif) without some additional circuitry, you are going to need a scope. you might be able to get away with a PC soundcard scope setup and do FFT analysis after the fact to determine the frequency. the other think you need to know is if the knock sensor has a flat frequency response and the filtering is done in the ecu or if the sensor is tuned to a specific frequency. my sensor is sensitive to noises in the 6000-6300hz range. i dont know what sho sensors are or if the ECU does filtering. basically, i wouldnt try other sensors on the engine as they probably wont be sensitive in the right frequencies. Brian ---
**Author:** ![Slopoke](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/slopoke/32/7248_2.png) [@Slopoke](https://forums.speedlife.net/u/Slopoke)\ **Post date:** [June 10, 2008, 2:21pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/54 "2008-06-10T14:21:50Z")
Wtf are you guys talking about lol you too def know your shit, well atleast you should like ya do :tup: i just wanna see it run 11’s ---
**Author:** ![Slopoke](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/slopoke/32/7248_2.png) [@Slopoke](https://forums.speedlife.net/u/Slopoke)\ **Post date:** [June 10, 2008, 2:22pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/55 "2008-06-10T14:22:07Z")
Shit even 12’s reliably! ---
**Author:** ![1BADGPGT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1badgpgt/32/5123_2.png) [@1BADGPGT](https://forums.speedlife.net/u/1BADGPGT)\ **Post date:** [June 10, 2008, 4:33pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/56 "2008-06-10T16:33:59Z")
So, maybe we’ll get a run in this year? The family car shootout is goin’ down…lol Good to see it running again. ---
**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 11, 2008, 12:01am UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/57 "2008-06-11T00:01:26Z")
a search of shoforum shows that the knock sensor is tuned someplace around the 7000hz range i posted a thread w/ your questions, ill see if i get any reponses to it ---
**Author:** ![reliant\_turbo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/reliant_turbo/32/7189_2.png) [@reliant\_turbo](https://forums.speedlife.net/u/reliant_turbo)\ **Post date:** [June 11, 2008, 12:07pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/58 "2008-06-11T12:07:48Z")
cool. ---
**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")
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) ---
**Author:** ![reliant\_turbo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/reliant_turbo/32/7189_2.png) [@reliant\_turbo](https://forums.speedlife.net/u/reliant_turbo)\ **Post date:** [June 13, 2008, 9:17pm UTC](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335/60 "2008-06-13T21:17:16Z")
yeah, its setup for safety after a knock event occurs. is there a table that defines knock sensor voltage vs rpm or something like that? i guess youll have to do some sort of test like described earlier. Brian [Previous page](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335.md?page=2) [Next page](https://forums.speedlife.net/t/turbosho-engine-teardown-w-pics/48335.md?page=4)