Jump to content
Sign in to follow this  
Jah6792020

Has anybody put a L20B head on a KA24E Bottome end ( I need backwards of typical)

Recommended Posts

I have a Racecar at Local Racetrack.  My car is a 510.  I am looking at bottom ends and I like the 6.50" rods and a 2400cc bottom end. I raced earlier this year with a high compression L20B amd blew a double felpro gasket set up ( too Much Compression). 

I would like to reuse my head, because our rules say 2 valves per cylinder. So the KA head is not an option for me.. 

I know typically everyone wants the KA24E head on a L20B bottom end.  

Our Rules...  2600cc max, 2 valves per cylinder, porting and polishing, roller camshafts, Holley 350 carb (7448) , header is ok...

I am trying to figure out what holes need to be welded on the head to stop the water in oil situation. I am thinking on adding links onto the L20B timing chain and I can run a line from where oil pressure guage goes to pressurize the oil bar in head.. my existing header will bolt up and I have a manifold.  

Has anyone tried going the opposite way of what everyone else does? 

 

 

  • Like 1

Share this post


Link to post

There is a coolant passage in the back of the KA block that would connect into an oil drain back hole in the L head. I guess an L head will work with a single chain timing chain. You'll need a fuel pump eccentric. A car KA has a large crank girdle but a truck doesn't so fitting it into a Datsun would be easier. KA compression with L head would be around 8.64. 

 

I would find a Z24 engine and do it instead. Everything fits. Already as dual timing chain though it needs 4 links added. Compression is 9.44.

 

Your L series oil pan and engine mounts will fit the Z24 but not the KA...

 

QwwzFYW.jpg

 

 

afpCKaB.jpg

 

KA main bearings are much smaller than L or Z series.

F4e52N7.jpg 

 

Z24 rods (right) are beefier than the KA...

WBQeCJk.jpg

 

  • Like 1

Share this post


Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.