# sohc bottom with a dohc head and sohc ecu... **URL:** \ **Category:** SON240sx Automotive\ **Created:** [July 11, 2007, 7:49pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614 "2007-07-11T19:49:47Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Elroy](https://avatars.discourse-cdn.com/v4/letter/e/5e9695/32.png) [@Elroy](https://forums.speedlife.net/u/Elroy)\ **Post date:** [July 11, 2007, 7:49pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/1 "2007-07-11T19:49:47Z")
I guess i got bored, and figured I’d try and build my first motor, haha. I thought about trying the supercharger route but decided to cheap out go the high compression route. I used the 8.5:1 pistons with the dohc head, which my understanding is supposed to result in 11.1:1 cr. I had to modify lower timing chain tensioner from the sohc to fit, the dohc tensioner won’t work with the lower timing cover. I also had to modify the lower tensioner guide from the sohc to fit. Brendan and I started the motor up few hours ago, and aside from my base timing being a bit off, it ran great. It even idled beautifully. Thanks to those to helped out, especially Brendan who helped greatly with with actual swap, and Graham who helped with getting a bunch of the parts. I’m going to fix time timing tomorrow though, I don’t feel like pulling the oil pump off tonight :S. The block I started with. [![http://img297.imageshack.us/img297/913/dsc02457ax6.th.jpg](http://img297.imageshack.us/img297/913/dsc02457ax6.th.jpg)](http://img297.imageshack.us/my.php?image=dsc02457ax6.jpg) The cylinder head I used after coming back from the machine shop for cleaning and decking. [![http://img146.imageshack.us/img146/2914/dsc02484oz9.th.jpg](http://img146.imageshack.us/img146/2914/dsc02484oz9.th.jpg)](http://img146.imageshack.us/my.php?image=dsc02484oz9.jpg) [![http://img146.imageshack.us/img146/1828/dsc02487wk7.th.jpg](http://img146.imageshack.us/img146/1828/dsc02487wk7.th.jpg)](http://img146.imageshack.us/my.php?image=dsc02487wk7.jpg) The tensioner and guide modified. [![http://img46.imageshack.us/img46/6606/dsc02495sh2.th.jpg](http://img46.imageshack.us/img46/6606/dsc02495sh2.th.jpg)](http://img46.imageshack.us/my.php?image=dsc02495sh2.jpg) The old and the new. [![http://img176.imageshack.us/img176/1245/dsc02500dp7.th.jpg](http://img176.imageshack.us/img176/1245/dsc02500dp7.th.jpg)](http://img176.imageshack.us/my.php?image=dsc02500dp7.jpg) Just after being started [![http://img244.imageshack.us/img244/9093/dsc02503oc7.th.jpg](http://img244.imageshack.us/img244/9093/dsc02503oc7.th.jpg)](http://img244.imageshack.us/my.php?image=dsc02503oc7.jpg) ---
**Author:** ![simplemind7](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@simplemind7](https://forums.speedlife.net/u/simplemind7)\ **Post date:** [July 12, 2007, 3:37pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/2 "2007-07-12T15:37:28Z")
looks good mark, did you get the timing set yet? ---
**Author:** ![Elroy](https://avatars.discourse-cdn.com/v4/letter/e/5e9695/32.png) [@Elroy](https://forums.speedlife.net/u/Elroy)\ **Post date:** [July 12, 2007, 5:59pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/3 "2007-07-12T17:59:19Z")
I’m lazy and in no rush. Maybe tomorrow I’ll fix the timing haha. ---
**Author:** ![darkside240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/darkside240sx/32/5649_2.png) [@darkside240sx](https://forums.speedlife.net/u/darkside240sx)\ **Post date:** [July 13, 2007, 5:03pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/4 "2007-07-13T17:03:49Z")
thats awsome!! good job! ---
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [July 14, 2007, 2:58pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/5 "2007-07-14T14:58:39Z")
soo no power steering? ---
**Author:** ![Elroy](https://avatars.discourse-cdn.com/v4/letter/e/5e9695/32.png) [@Elroy](https://forums.speedlife.net/u/Elroy)\ **Post date:** [July 17, 2007, 4:54pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/6 "2007-07-17T16:54:50Z")
No power steering is right, haha. I don’t mind it that much actually. I finally got around to sorting out the timing. She’s fun to drive now, fair bit torquier. I packed the motor mounts with PL construction urethane adhesive I think it was called. Pretty much like solid mounts now, and I got used to those after bout 20 mins, but yea much more vibrations lol. ---
**Author:** ![alesserfate](https://avatars.discourse-cdn.com/v4/letter/a/f6c823/32.png) [@alesserfate](https://forums.speedlife.net/u/alesserfate)\ **Post date:** [July 17, 2007, 6:58pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/7 "2007-07-17T18:58:50Z")
wow this is sick, put it on a dyno asap! ---
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [July 17, 2007, 9:31pm UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/8 "2007-07-17T21:31:39Z")
can you take a picture of the urathane you used? also where can you find it? thanks ---
**Author:** ![darkside240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/darkside240sx/32/5649_2.png) [@darkside240sx](https://forums.speedlife.net/u/darkside240sx)\ **Post date:** [July 18, 2007, 6:15am UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/9 "2007-07-18T06:15:14Z")
what did it cost you to have the head machined? ---
**Author:** ![Elroy](https://avatars.discourse-cdn.com/v4/letter/e/5e9695/32.png) [@Elroy](https://forums.speedlife.net/u/Elroy)\ **Post date:** [July 18, 2007, 6:47am UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/10 "2007-07-18T06:47:53Z")
$60 for cleaning (washing and bead blasting, it was a dirty mofo, with a some really caked on carbon) $60 for the machining (kinda needed it after the bead blasting lol) ---
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 18, 2007, 7:39am UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/11 "2007-07-18T07:39:11Z")
A nice little project, thanks for sharing! It really makes me want to build a bulletproof block on the side to drop in my car for some psycho boost #'s… 😃 ---
**Author:** ![NVmySX](https://avatars.discourse-cdn.com/v4/letter/n/f07891/32.png) [@NVmySX](https://forums.speedlife.net/u/NVmySX)\ **Post date:** [December 2, 2008, 9:45am UTC](https://forums.speedlife.net/t/sohc-bottom-with-a-dohc-head-and-sohc-ecu/107614/12 "2008-12-02T09:45:47Z")
eh elroy after u did work to the engine and had everything done, how did the engine perform? Did it last for a long time? Any mechanical problems? Difference in fuel economy?