Some of the photos on the page don't have larger versions. I just checked the page myself and they all seemed to work. Can you tell me which ones did not work?
I didn't reroute the oil drain hole. I have had the rocker cover off a couple of times and inspected it. A little oil pools there and sometimes some oil spits out the cover vent, which is right above the blocked drain! I am going to need to address that. Apart from that, I don't see it as any limitation. I don't think Z-series engines had this drain hole.
zac
rclough wrote:
Just checked out your web page story on the KA head conversion for your L20B Turbo. A great report on the trials and errors to make it so much easier for the next traveller down this path. Couldn't get the last few photos. Are they up on the site?
Brilliant engineering work Zac! Tell us how it goes when you're regularly using the engine. In particular how the engine temp holds with the water jacket changes.
How have you rerouted the oil return after welding the oil hole in the head?
Dont worry about those uninformed persons who were more interested in the bolt in turbo power upgrades, the really knowledgable people would appreciate the innovation in your approach.
----- Original Message ----- From: "Zac Campbell" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, January 04, 2005 6:03 PM Subject: Re: L ain't dead, baby! (brag session)
Santa blessed me with a new digital camera this Xmas so I have been able to finish the webpage on the KA24 head conversion. http://members.iinet.net.au/~zac510/ka24head.html Hopefully it explains thoroughly all the fuckups involved in the head conversion :)
zac
oh, and let's get some chatter on this list! :)
Zac Campbell wrote:
OK, a few of you know of my bastardised L20b engine... Well it hit the chassis dyno today for the very first time. Mucked around with niggles and tuning for a few hours then knuckled down for a good power run. It churned out 130kw at the wheels on 16psi! Something in the wastegate was stopping it from controlling boost so it spiralled to 16psi - not that that was a problem, tough ol' L20b took it all :) The tuner did about a dozen full power runs upto 16psi but the poor boost control and some other stuff stopped us from going too much further. It doesn't have an intercooler so intake temps were right up there. In the end I walked away with a sound base map and a result far above my initial expectations. Of course this doesn't happen on any ordinary L20b, I've fitted a KA24E TRX head and made the few other modifications to make this work. The dead stock bottom end and KA24 head combo can rev to 7000rpm quite
easily.
Here is an engine bay photo: http://members.iinet.net.au/~zac510/bay_8.jpg Here is the dyno vid! http://members.iinet.net.au/~zac510/dyno1.mpg (3mb divx)
I'm still working on a page with a thorough walk through of the
conversion.
Zac
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