a couple q's...
1) are the pistson from the truck KA the same as the pistons from the 240sx KA?
2) Anyone know the stock compression of a 95 D21 KA24E?
3) Are the timing components the same from the 240sx KA as teh truck KA?
4) If i were to put higher comp. pistons (say 10:1) what kind of estimated gain HP and torque?
5) Are the water pumps the same from the 240sx KA as the truck KA?
I have an extra Ka motor from my 240sx so I am trying to find out what i am able to swap to my trucks motor.
For ****s and giggles here's the truck i just bought
ka rebuild parts for the truck (ka24E)
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nis720
- Posts: 133
- Joined: Fri Feb 17, 2006 11:46 am
- Car: 86' Nissan 720 truck / 06' Silverado truck
- Location: Compton, CA
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Re: ka rebuild parts for the truck (wild_maxx)
You could just swap the intake.... The motor have some differences... mainly the oil pan..... truck has rear sump and the 240 has front sump. I'm in the process of swapping my motor.... I'm getting rid of the Z24 in place of the KA (truck block) with the 240 intake, harness, and computer.
Re: ka rebuild parts for the truck (nis720)
i am not trying to swap engines or intakes... i just want to re-use some of the parts from the spare 240sx KA and put them on the truck KA.
Re: (nismopu)
240's don't have a dome to them... i have taken out alot of SOHC pistons and never found any dome pistons. I just need to know if i will have any valve clearance issues if i use a set of 9:1 pistons from my 240sx KA and put them in my truck KA.
Re: (nismopu)
the early kaE's has to version compressions one was 9:1 and another 8.5:1
another question for anyone.... will the 240sx KA head work with the truck KA block? I just found out my truck KA head is dead.....
another question for anyone.... will the 240sx KA head work with the truck KA block? I just found out my truck KA head is dead.....
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deviousKA
- Posts: 1355
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- Car: 90 240sx NA /72 Datsun 510 NA /86 corolla GTS NA
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Re: (wild_maxx)
1)Not exactly. The pistons have the same dimensions including bore, compression distance, dish volume, ring configuration etc.., but they are not designed to accept piston pin locks for a full float pin, they are press fit only. The pistons in the 90-97 d21 ka24e yeild 8.6:1 like those of the later 240sx ka24e. Most of the ka24e pistons in the truck versions of the ka24de are top coated with graphite similar to ka24de.
The truck rods are different, pin bushings are not installed and pistons must be removed/installed by machine shop only.
2)8.6:1
3)Yes, exactly.
4)No comment on increases, truck has a detonation problems as-is with oem compression ratio, look into changing ratios and/or tire size, or use a 2wd. If running high compression, premium fuel and water/alc injection would be very very wise.
5)Yes, exactly, but you will notice the hub is different as the truck uses v-belts.
The piston to valve clearance characteristics are the same as the 240sx ka your are familiar with. You can swap a 240sx ka24e head onto your late model truck ka block, but you will not be able to use your 94-97 truck intake manifold. You can use 89-90 240sx or 90-93 truck.
The truck rods are different, pin bushings are not installed and pistons must be removed/installed by machine shop only.
2)8.6:1
3)Yes, exactly.
4)No comment on increases, truck has a detonation problems as-is with oem compression ratio, look into changing ratios and/or tire size, or use a 2wd. If running high compression, premium fuel and water/alc injection would be very very wise.
5)Yes, exactly, but you will notice the hub is different as the truck uses v-belts.
The piston to valve clearance characteristics are the same as the 240sx ka your are familiar with. You can swap a 240sx ka24e head onto your late model truck ka block, but you will not be able to use your 94-97 truck intake manifold. You can use 89-90 240sx or 90-93 truck.
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deviousKA
- Posts: 1355
- Joined: Tue Aug 12, 2003 5:04 pm
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Re: ka rebuild parts for the truck (nis720)
nis720, if you want KA status in your 720 you have the ability to save some time and gain some upgrades in the process.
Take yours or another 2wd z24 shortblock, remove the rods and get the small end narrowed to .975". Install ka24e truck pistons onto your z24 rods and install. Install ka24e head with z24 or ka24 headbolts and headgasket (both same), and use the z24 dual row timing setup (everything, it swaps right over. If your Z has single row, which it shouldnt unless its been swapped from an ~89 d21, swap to the dual row setup).
And thats it, swap your ka manifolds of choice over to your new hybrid ka/z.
What you gaining here is a major timing chain/gear upgrade, with factory 3 position cam timing adjustment. The gear count of both the upper and lower timing gears of Z is larger, along with the chain length. This system has less tendency to wrap lower gear with low chain tension, not to mention is is twice as strong. This is the way the last rendition of the nissan 2.4l should have been done, and is most likely similar to nissans early prototypes, overbuilt.
Take yours or another 2wd z24 shortblock, remove the rods and get the small end narrowed to .975". Install ka24e truck pistons onto your z24 rods and install. Install ka24e head with z24 or ka24 headbolts and headgasket (both same), and use the z24 dual row timing setup (everything, it swaps right over. If your Z has single row, which it shouldnt unless its been swapped from an ~89 d21, swap to the dual row setup).
And thats it, swap your ka manifolds of choice over to your new hybrid ka/z.
What you gaining here is a major timing chain/gear upgrade, with factory 3 position cam timing adjustment. The gear count of both the upper and lower timing gears of Z is larger, along with the chain length. This system has less tendency to wrap lower gear with low chain tension, not to mention is is twice as strong. This is the way the last rendition of the nissan 2.4l should have been done, and is most likely similar to nissans early prototypes, overbuilt.
Re: ka rebuild parts for the truck (deviousKA)
hmmm you say i can't use the truck intake mani on the 240 head? I put the truck intake on the 240 head and it all fit correctly. the only difference we could find was the injector port where it sprays fuel into the head.
The truck head has a larger opening for the injectors to spray into while the 240sx has a smaller port for the injectors to spray into.
I put a truck intake gasket on the 240 head and traced the inside of where the truck injector sprays and there is plenty of room to grind out. I am going to try to grind out all 4 ports (just the outside not into the ports) so the fuel will spray directly into the intake ports.
This is a 240 kaE intake mani... the injector ports are smaller so i plan to just grind them out.... hope this works.... the black part on the right intake port is about how much i will have to grind out.
Modified by wild_maxx at 6:07 PM 3/1/2006
Modified by wild_maxx at 6:08 PM 3/1/2006
The truck head has a larger opening for the injectors to spray into while the 240sx has a smaller port for the injectors to spray into.
I put a truck intake gasket on the 240 head and traced the inside of where the truck injector sprays and there is plenty of room to grind out. I am going to try to grind out all 4 ports (just the outside not into the ports) so the fuel will spray directly into the intake ports.
This is a 240 kaE intake mani... the injector ports are smaller so i plan to just grind them out.... hope this works.... the black part on the right intake port is about how much i will have to grind out.
Modified by wild_maxx at 6:07 PM 3/1/2006
Modified by wild_maxx at 6:08 PM 3/1/2006