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KA24E Head Conversion
http://www.ozdat.com.au/forum/viewtopic.php?t=3817		 Page 25 of 27
Author:  Group3JDatsun [ Thu May 02, 2013 4:26 pm ]
Post subject:  Re: KA24E Head Conversion
SSSBEE wrote:
Group3JDatsun wrote:
dizzylimits wrote:
Read an article and saw a clip not long ago about Les Collins with L18 block+KA24 head, custom crank,rods and pistons + TB injection that made 293hp @ 8350rpm was a youtube clip I think.
Can you remember where you saw the article? I'd be keen to track it down if I can.

I'll also check out youtube; thanks for the lead.
There is a guy on down under datsuns facebook page that works for Les Collins, He always posts pictures of LKA motors he builds and doesn't mind answering questions.
Hmmm.....many thanks. I don't facebook, but my wife does. I'll hijack her account and chase him down through her; many thanks.
Author:  Group3JDatsun [ Thu May 02, 2013 4:27 pm ]
Post subject:  Re: KA24E Head Conversion
lampy wrote:
See my build thread for photos of a L18de build
http://www.ozdat.com/forum/viewtopic.php?f=59&t=20290
Wow Lampy, thats a VERY nice setup!!! Good work!!!
Author:  d [ Sat May 04, 2013 1:08 am ]
Post subject:  Re: KA24E Head Conversion
Dave wrote:
22re sprocket seems to work fine, I bought one a while back and bored it out no dramas.

My intention was to find a chain that is close, then position the tensioner to suit the chosen chain (ie if the chain is a little long, move the tensioner in to take up the slack). Something along the lines of the Kameari L-series tensioner should work a treat (once I work out how to adjust it when its buried down in the timing cover).

Or if I get really keen, make a full gear train as per the LZ engines.
Where did you buy the sprocket for the 22r as the ones on ebay are as a whole kit, still cheap but just checking if you have a good avenue? I honestly thought the original ka24de chain could be shortened easily enough.
Author:  lampy [ Sat May 04, 2013 9:31 am ]
Post subject:  Re: KA24E Head Conversion
You can use the ka24 chain. It needs to be broken, shortened and then reconnected using a master link or pushing the pin back in and then peened over. A good chain break tool needs to be used
Author:  d [ Sat May 04, 2013 3:06 pm ]
Post subject:  Re: KA24E Head Conversion
lampy wrote:
You can use the ka24 chain. It needs to be broken, shortened and then reconnected using a master link or pushing the pin back in and then peened over. A good chain break tool needs to be used
Thank you 1 more piece of the puzzle :cheers
Author:  Dave [ Sat May 04, 2013 3:17 pm ]
Post subject:  Re: KA24E Head Conversion
My 22r sprocket came from the US. I bought a new KA24DE timing chain kit, plus the Toyota sprocket, from a mob on ebay that sold engine reco parts. Was a few years back now.
Author:  d [ Sat May 04, 2013 4:09 pm ]
Post subject:  Re: KA24E Head Conversion
Dave would you have the the KA24DE complete head weight?
or in the state below to see its component weights?
http://i12.photobucket.com/albums/a238/ ... 011324.jpg

[ img ]
Author:  Dave [ Sat May 04, 2013 7:34 pm ]
Post subject:  Re: KA24E Head Conversion
Sure do, will try to weigh it in the next day or two.
Author:  d [ Wed May 15, 2013 1:27 am ]
Post subject:  Re: KA24E Head Conversion
any progress on those bathroom scales Dave?
Author:  Dave [ Wed May 15, 2013 11:05 am ]
Post subject:  Re: KA24E Head Conversion
Sorry, will try to remember tonight.
Author:  Dave [ Thu May 16, 2013 10:49 pm ]
Post subject:  Re: KA24E Head Conversion
OK, all the bits as in your picture, minus the idler sprocket but including the radiator hose elbow and with a FWD front cover (no dizzy drive, etc) = a whisker over 23kg by my old bathroom scales.

Heavy little sucker !!
Author:  d [ Fri May 17, 2013 5:14 pm ]
Post subject:  Re: KA24E Head Conversion
Thank you :cheers thats fantastic its actually lighter than the CA18de head which is around 25kg.

37-39 kg L16/early L18 sleeved to 89mm
13kg knife edged crank
2.5kg H beam rods 1.5kg pistons
10kg timing components, sump & oil pump
23kg head as you weighed it
Total
86-88kg not bad really
Author:  shanevasquez [ Mon Jul 01, 2013 3:34 am ]
Post subject:  Re: KA24E Head Conversion
Ok Since yall seam to know a whole lot about these engines I have a question. I know it has been done seen a video on youtube. KA24de head on Z24 block. Just not sure what to do about timing cover. I am building the engine for my drift car so want it to be able to rev to 9000 easily. the KA crank will like blow up not being a fully weighted crank. So here are my calculations. I want 11:1 on low low boost to rev to 9. Here are my numbers, but need timing cover. :(

Running 90mm pistons with set 9.5:1 compression (-2.8 cc) having a 34mm piston compression heights, after head is milled, running an 86mm crank (L20b) in a Z24 block with a deck height of 247.45, I can use a 170mm rod, as long as the head still has its 56cc compression chamber(like it should) I will still have a .44mm piston to deck height (Stock being .45) with a 1.98:1 rod ratio and will be 9.8:1 compression. Now I have been looking for numbers on the 10.5"1 pistons but pretty sure running a 10.5:1 pistons I will be just under 11:1.

So any ideas on timing cover? Someone said I might have to half and half it. :/ I guess top part KA24 bottom Z24?
Author:  Dave [ Mon Jul 01, 2013 11:22 am ]
Post subject:  Re: KA24E Head Conversion
You could use the shorter timing cover (L20B /Z20 - assuming they will bolt onto a Z24 block). Then use the height difference to squeeze and adapter in. ie Short timing cover bolts to underside of adapter, KA24 front head cover bolts to top of adapter.

Just an idea, not tried / tested.
Author:  shanevasquez [ Mon Jul 01, 2013 4:02 pm ]
Post subject:  Re: KA24E Head Conversion
My thought from advice my fried said about merging them is cut top flang off KA24 oil pump and cut top of Z24 and tig weld them together, but am hoping yall know an easier way. lol
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