Got my 89 240sx about 2 months ago and have fallen in love with it. It's also the car I chose to help me learn more about auto mechanics. I want to make it fast and like most people I wanted to make it a little different. So I decided to walk the path of KA24E-T. I went and picked up another KA24E so I could take my time and still play with my 240. Currently I'm trying to figure out what needs to be replaced during my rebuild to prepare it for the stresses of turbo.
I have been researching this for a while and found what I thought was a good rebuild package at http://www.importperformanceparts.net/. I was thinking the HP package with the oil pump (I've heard that it's a good idea to replace it whether it's working or not while you've got everything apart).
Here's my question. Is there more that needs replaced/upgraded than what's in this package? Will the Stock Connecting rods become a big problem later on?
I plan on rebuilding the head as well and am having the same questions there. Should I just replace the springs with new oem ones just to be sure it will be ok?
I know I need machine work done to all of this. The things I currently have on my list are: Bore/Hone the cylinders, Decking the block, tank cleaning the block, porting the head, jet cleaning the head, and I've read that deburring the block has its benefits as well. Is that all that needs done?
Thanks for the help.
KA24E rebuild for turbo
You got a lot of the stuff down. But thats just engine preperation. Question is how much horsepower are you planing to achive.
If you for instance read some post couple months back, you will see that a lot of us have over estimated the strenght of our stock rods. The stock block will hold up to about 300rwhp, with a better fuel system and good tune.
And tuning is another thing. Anything you do or add to your car especialy turbo wise, you want to get the best tune possible. Cause with out a proper tune it dosent matter how much you rebuild your car, you will awlayes run into trouble. Hope this helps and points you at the right dirrection.
This site has so much info about turboing your KA you won't know what to do with it, just don't be afraid of the SEARCH button.
If you for instance read some post couple months back, you will see that a lot of us have over estimated the strenght of our stock rods. The stock block will hold up to about 300rwhp, with a better fuel system and good tune.
And tuning is another thing. Anything you do or add to your car especialy turbo wise, you want to get the best tune possible. Cause with out a proper tune it dosent matter how much you rebuild your car, you will awlayes run into trouble. Hope this helps and points you at the right dirrection.
This site has so much info about turboing your KA you won't know what to do with it, just don't be afraid of the SEARCH button.
Re: (S13FX)
I'm having trouble finding previous posts that are relevant. Don't suppose you have a link to anything that might help?
I see where someone put 500hp on the stock ka rods before they bent... was that in a KA block?
As for target hp. I was thinking somewhere around 250hp eventually. Like most people funds are tight for me, so right now I'm just addressing all of my mechanical problems... but I don't think I could justify not rebuilding the engine with the right parts for turbo.
It just occured to me I may not have a good grasp of what tuning actually means. I've been stuck on ECU tuning and thinking of that only when I hear someone mention tuning. But the more I look around I realize that you are also talking about other things as well, right? (Like MAF, injectors, Fuel Pump, etc?)
Sorry to be yet another n00b that needs some learning.
I see where someone put 500hp on the stock ka rods before they bent... was that in a KA block?
As for target hp. I was thinking somewhere around 250hp eventually. Like most people funds are tight for me, so right now I'm just addressing all of my mechanical problems... but I don't think I could justify not rebuilding the engine with the right parts for turbo.
It just occured to me I may not have a good grasp of what tuning actually means. I've been stuck on ECU tuning and thinking of that only when I hear someone mention tuning. But the more I look around I realize that you are also talking about other things as well, right? (Like MAF, injectors, Fuel Pump, etc?)
Sorry to be yet another n00b that needs some learning.
Ok you sound kind of what I’m going to be doing. Here is my setup for instance.
Right now all I did was took care of all the mechanical problems with my engine, got rid of useless crap, and little by little I replaced old parts with new parts that would benefit me for a turbo.
As of now I got a new walbro fuel pump, replaced my fuel filter with one from a '92 Turbo 300zx, a new toyo radiator, got rid of the stock clutch fan and got some 97 altima dual fans, and got a better clutch. Now I also have some 450cc injectors from a GSX eclipse that I'm going to be using.
Now for tuning I’m going to go with a Emanage ultimate since I have a free access to a dyno and I want to expend my knowledge further on tuning. But for your goal a wideband and a SAFC would do just fine. I’m going to wire that in the same day I replace my injectors but before I put my turbo on. I’m going to run my car like this for a little bit and get familiar with all my parts. Later I’m going to put together a whole JGS Turbo set up with a T3/T04E. Now on this engine I plan on running only around 300hp just so I get familiar with everything and learn all the little tricks.
For later on I already have a SOHC block in my garage being taken apart slowly labeling everything, and learning all the parts. That’s the block I,m going to rebuild and have real fun with.
And don’t worry about being new. We were once all new before. Also there is also great info in the sticky. They have a whole thread in there about the rods and everything. Turbo setups, fuel system setups, injector spread sheets. Pretty much everything you need to know.
Right now all I did was took care of all the mechanical problems with my engine, got rid of useless crap, and little by little I replaced old parts with new parts that would benefit me for a turbo.
As of now I got a new walbro fuel pump, replaced my fuel filter with one from a '92 Turbo 300zx, a new toyo radiator, got rid of the stock clutch fan and got some 97 altima dual fans, and got a better clutch. Now I also have some 450cc injectors from a GSX eclipse that I'm going to be using.
Now for tuning I’m going to go with a Emanage ultimate since I have a free access to a dyno and I want to expend my knowledge further on tuning. But for your goal a wideband and a SAFC would do just fine. I’m going to wire that in the same day I replace my injectors but before I put my turbo on. I’m going to run my car like this for a little bit and get familiar with all my parts. Later I’m going to put together a whole JGS Turbo set up with a T3/T04E. Now on this engine I plan on running only around 300hp just so I get familiar with everything and learn all the little tricks.
For later on I already have a SOHC block in my garage being taken apart slowly labeling everything, and learning all the parts. That’s the block I,m going to rebuild and have real fun with.
And don’t worry about being new. We were once all new before. Also there is also great info in the sticky. They have a whole thread in there about the rods and everything. Turbo setups, fuel system setups, injector spread sheets. Pretty much everything you need to know.
Re: (S13FX)
Are you going to be rebuilding the bottom end of your engine? What were you looking at putting in it? Where were you getting it from?
I've looked around at rebuild kits and I think I found a pretty good one for a reasonable price. But I'm not sure if I'm over doing it or if I'll actually be getting the performance in the end to justify the parts. I'm looking at a full gasket engine kit with a copper head gasket, 9.1cr (I think) forged pistons designed for turbo applications, oil pump, freeze plugs, etc. The whole kit was running around $980. From my understanding it's the pistons and rings that go first due to high hp turbo.
Is that overkill? Or the right way to build a ka24et with a target hp of around 250?
I've looked around at rebuild kits and I think I found a pretty good one for a reasonable price. But I'm not sure if I'm over doing it or if I'll actually be getting the performance in the end to justify the parts. I'm looking at a full gasket engine kit with a copper head gasket, 9.1cr (I think) forged pistons designed for turbo applications, oil pump, freeze plugs, etc. The whole kit was running around $980. From my understanding it's the pistons and rings that go first due to high hp turbo.
Is that overkill? Or the right way to build a ka24et with a target hp of around 250?
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Iamjohnhayes
- Posts: 411
- Joined: Mon Apr 25, 2005 9:42 am
- Car: 89 Single Cam Hatch
Re: (BlackHat)
Two Things.....
There is nothing wrong with building a motor that can handle more HP than you desire. for example, I really only intend to have about 300 to 350 out of my KA b/c i would like to do some auto-x and road course stuff where i dont want the turbo lag. I am currently working on rebuilding my bottom end and installing Pauter Rods and Wiseco Pistons which can handle well more than i intend on throwing at it. I think if you have it apart and a second block why not go the extra step that will allow you to up the boost and power later if you ever decide you want too.
And 2nd for all you guys wanting to rebuild your bottom end.....
After you get the block back from the machine shop clean the piss out of it before rebuilding. Do no use an solvent on the block afer it has been honed. This will just push and dirt / metal particles into the cross hatch on the walls which will kill your motor. after you get it back clean out the bores with warm water and a detergent soap. after you have clean out the cylinder bores take some toilet paper and ATF and wipe down the bores. Pour the ATF onto a wad of Clean TP. It should come out really black and dirty for a while. Keep repeating this with atf and clean TP till you can wipe down the bore and see nothing but red ATF on the paper. now your block is clean enough to assemble. Also remember to clean and dry all you other parts and then spray them with wd40 so they dont rust.
There is nothing wrong with building a motor that can handle more HP than you desire. for example, I really only intend to have about 300 to 350 out of my KA b/c i would like to do some auto-x and road course stuff where i dont want the turbo lag. I am currently working on rebuilding my bottom end and installing Pauter Rods and Wiseco Pistons which can handle well more than i intend on throwing at it. I think if you have it apart and a second block why not go the extra step that will allow you to up the boost and power later if you ever decide you want too.
And 2nd for all you guys wanting to rebuild your bottom end.....
After you get the block back from the machine shop clean the piss out of it before rebuilding. Do no use an solvent on the block afer it has been honed. This will just push and dirt / metal particles into the cross hatch on the walls which will kill your motor. after you get it back clean out the bores with warm water and a detergent soap. after you have clean out the cylinder bores take some toilet paper and ATF and wipe down the bores. Pour the ATF onto a wad of Clean TP. It should come out really black and dirty for a while. Keep repeating this with atf and clean TP till you can wipe down the bore and see nothing but red ATF on the paper. now your block is clean enough to assemble. Also remember to clean and dry all you other parts and then spray them with wd40 so they dont rust.