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turbo z24?!


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#1 tomcat

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Posted 05 May 2010 - 01:49 AM

Just a thought.. anyone ever turbo a z24? i love turbos, and i was thinking a draw through setup would be pretty cool on my truck. but im doubting the engine can handle it without some serious modificatation, but then again.. i may be wrong. Has it been done?

i was thinking L20b head swap, try to drop the compression somehow (thicker head gasket?), and a sidedraft carb with a draw through turbo, i might be able to run 6 psi or so, not sure how much power it would make, but it should be decent, and definately different.

any thoughts?

#2 Skib

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Posted 05 May 2010 - 02:15 AM

A Z24 block with a U67 head and 1mm head gasket should give you a 9.6CR, 8.8CR with a 2mm gasket.

you could lower it more with some more dish in the pistons

I dont see why it shouldnt be able to handle 6 psi, its not much boost

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#3 elmerfudpucker

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Posted 05 May 2010 - 02:22 AM

Well a turbo is nice as long as you dont plan on hauling stuff, If you work your truck like I do I would say a supercharger would be a better idea. But if you plan on that route, wouldnt a full turbo motor swap be better and cheaper? It is an 83, so I am guessing you got EFI, so most of the wires are there already, right?

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#4 hang_510

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Posted 05 May 2010 - 09:32 AM

A Z24 block with a U67 head and 1mm head gasket should give you a 9.6CR

IIRC (maybe w/a 1.5mm gasket?) im right around 9.1 CR... runs great on 87 :D

i will confirm actual on the current build.

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#5 Skib

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Posted 05 May 2010 - 12:52 PM

IIRC (maybe w/a 1.5mm gasket?) im right around 9.1 CR... runs great on 87 :D

i will confirm actual on the current build.


ya that should be right.

my engine calc says 9.2

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#6 izzo

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Posted 05 May 2010 - 01:02 PM

Well a turbo is nice as long as you dont plan on hauling stuff, If you work your truck like I do I would say a supercharger would be a better idea. But if you plan on that route, wouldnt a full turbo motor swap be better and cheaper? It is an 83, so I am guessing you got EFI, so most of the wires are there already, right?



wrong, 83 is carb my friend. late 720s in 85, some of those got the throttle body that the early hardbody did.

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#7 tomcat

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Posted 06 May 2010 - 07:13 PM

Well a turbo is nice as long as you dont plan on hauling stuff, If you work your truck like I do I would say a supercharger would be a better idea. But if you plan on that route, wouldnt a full turbo motor swap be better and cheaper? It is an 83, so I am guessing you got EFI, so most of the wires are there already, right?


I dont usually haul heavy stuff, aside from a stand up jet ski, or my dirt bike, neither weigh more than 300lbs. Its mostly a street truck, and my daily driver for now. Supercharger would be cool too, but im kind of a turbo guy, also i love the echaust sound, you dont get that with a supercharger, lol. Plus i can get an old turbo almost anywhere for dirt cheap, superchargers are harder to come by, and more expensive. I have been thinking on doing a ka24e swap, i hear those are nice with a turbo, but i dont feel like messing with injectors and the ECU. I have a honda with about 600hp, if i want to go crazy, i can just hop in that. I mainly just want to be able to put on a good smokeshow, or show up some of the local ricers that think their fart cans make their cars fast, theyll never expect an old nissan covered in primer blasting reaggae. lol. Im really old school, and carbs are pretty easy to tune. The reason im leaning towards turboing my motor is because i already have it, i know it was babied for the first 90k of its life, so its good to go, plus i should be able to do all the work to it without pulling it from the truck.


What does a u67 come in? ( im new to nissans / datsuns, so im not really sure on anything with these motors quite yet).
What does it take to swap it on?

#8 datzenmike

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Posted 06 May 2010 - 07:46 PM

The Z24 has a tendency to blow head gaskets unless you re-torque the bolts at every tune up. A turbo is going to put a strain on this. You might want to consider ARP studs if using a turbo. Cheaper in the long run than replacing gaskets.

An L head will have to high a compression and more will need to be spent to prevent pre ignition than just running the stock Z head. The problem with the Z head is that it breathes poorly normally aspirated but this won't be normal. A turbo makes all motors more equal. It is already 8.4 compression and is the ideal HEMI shape, cross flow for good swirl, and dual plug so that less advance is needed. This is a cooler running and more detonation reasistant head. All these things make it a perfect candidate for a turbo. The Z18ET would be a good turbo manifold for the Z24 if you can find one. The Z18ET makes about 130 hp on minimal boost.

Yes an L head will make more power it revved but will be way more bother than if you just run 7lb on a stock Z24. The U-67 head came on most L20Bs from '75 through '77 when the W-58 was introduced. Yo will also need the two manifolds and the carb. The timing chain will need to be lengthened about 4cm and the top of the L20B timing chain cover modified (welded to make 2cm taller) to fit up under the L head. The Z24 block is 2cm taller. The L20B oil pump and distributor will be used. The motor will need L20B motor mounts to tilt the motor to keep the intake/carb level and this will mean the Z transmission will need to be changed as well. The L intake will be much closer to the master cylinder/booster but should clear without the stock air filter.

Just some stuff to think about.

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#9 tomcat

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Posted 08 May 2010 - 01:27 AM

The Z24 has a tendency to blow head gaskets unless you re-torque the bolts at every tune up. A turbo is going to put a strain on this. You might want to consider ARP studs if using a turbo. Cheaper in the long run than replacing gaskets.

An L head will have to high a compression and more will need to be spent to prevent pre ignition than just running the stock Z head. The problem with the Z head is that it breathes poorly normally aspirated but this won't be normal. A turbo makes all motors more equal. It is already 8.4 compression and is the ideal HEMI shape, cross flow for good swirl, and dual plug so that less advance is needed. This is a cooler running and more detonation reasistant head. All these things make it a perfect candidate for a turbo. The Z18ET would be a good turbo manifold for the Z24 if you can find one. The Z18ET makes about 130 hp on minimal boost.

Yes an L head will make more power it revved but will be way more bother than if you just run 7lb on a stock Z24. The U-67 head came on most L20Bs from '75 through '77 when the W-58 was introduced. Yo will also need the two manifolds and the carb. The timing chain will need to be lengthened about 4cm and the top of the L20B timing chain cover modified (welded to make 2cm taller) to fit up under the L head. The Z24 block is 2cm taller. The L20B oil pump and distributor will be used. The motor will need L20B motor mounts to tilt the motor to keep the intake/carb level and this will mean the Z transmission will need to be changed as well. The L intake will be much closer to the master cylinder/booster but should clear without the stock air filter.

Just some stuff to think about.




wow, that is EXACTLY the info i was looking for! THANKS!!! I didnt know i already had low compression, ive been deciding weather to swap in a ka24, or turbo my z24, i think i just decided on turboing my stock z24! arp studs... expensive ( got em in my turbo honda ), but if thats what will make it work, done!

Does anyone know what trannies and rear ends will swap directly in? with more power, the ratios will be pretty useless, unless i want to do little more than bake tires.

#10 datzenmike

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Posted 08 May 2010 - 06:04 AM

Does anyone know what trannies and rear ends will swap directly in? with more power, the ratios will be pretty useless, unless i want to do little more than bake tires.


The stock 2wd tranny is fine. Similar to the 620 and 280z 5spd. ratios. You could maybe lower the rear ratio to get it revving faster. Check the engine tag under the passenger side hood hinge on the inner fender. The rear axle ratio is on the tag.

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#11 Bleach

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Posted 08 May 2010 - 09:22 AM

Its not like the factory turbo L-series is a great head design anyway. They don't work too well with even 8.8:1 compression and low boost. There is a good reason the L28et has 7.4:1 static compression.

If you run even moderately high boost (7-9) then you don't want to have over 8.5:1 or so. You'll be running less ignition advance and high octaine fuel to avoid detonation. It really don't make any sense.
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#12 Sealik

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Posted 08 May 2010 - 04:19 PM

Z22 turbo fab.....by Patrick...................not me

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#13 Sealik

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Posted 18 May 2010 - 11:41 AM

Z22 turbo fab.....by Patrick...................not me

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...."i am looking to do a z24 turbo build and am looking for any help because it is a difficult thing to find info on. who is this Patrick? is he on this site?


Sorry....I should of 'splained' a little better..... :blink:
He's a member in another (720) site....
http://720world.ning...119Comment29792

#14 Zlich

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Posted 21 October 2012 - 04:08 PM

did you ever get this turbo built and working? if so Im really interested in what all you did. I would love to put a turbo on my 720.

#15 datzenmike

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Posted 21 October 2012 - 04:33 PM

Some info here but done with an S110 200sx intake with KA24E electronics and sensors....

http://720world.com/...o-build-a-z22et

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#16 CharlieW

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Posted 21 October 2012 - 06:11 PM

How will the z18 exhaust manifold line up with the z24 cylinder head?

#17 leosnake

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Posted 04 November 2012 - 10:55 AM

Some info here but done with an S110 200sx intake with KA24E electronics and sensors....

http://720world.com/...o-build-a-z22et

I'm glad I read this thread and this link!! I have 2 cast iron turbo manifolds for the Naps-z engine I purchased years ago from Australia...Time to try and do this conversion!

#18 datzenmike

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Posted 04 November 2012 - 10:57 AM

How will the z18 exhaust manifold line up with the z24 cylinder head?


All Z18/20/22/24 series have the same exhaust port shape and location.

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#19 Guam671

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Posted 06 November 2012 - 02:18 PM

The Z24 has a tendency to blow head gaskets unless you re-torque the bolts at every tune up. A turbo is going to put a strain on this. You might want to consider ARP studs if using a turbo. Cheaper in the long run than replacing gaskets.

An L head will have to high a compression and more will need to be spent to prevent pre ignition than just running the stock Z head. The problem with the Z head is that it breathes poorly normally aspirated but this won't be normal. A turbo makes all motors more equal. It is already 8.4 compression and is the ideal HEMI shape, cross flow for good swirl, and dual plug so that less advance is needed. This is a cooler running and more detonation reasistant head. All these things make it a perfect candidate for a turbo. The Z18ET would be a good turbo manifold for the Z24 if you can find one. The Z18ET makes about 130 hp on minimal boost.

Yes an L head will make more power it revved but will be way more bother than if you just run 7lb on a stock Z24. The U-67 head came on most L20Bs from '75 through '77 when the W-58 was introduced. Yo will also need the two manifolds and the carb. The timing chain will need to be lengthened about 4cm and the top of the L20B timing chain cover modified (welded to make 2cm taller) to fit up under the L head. The Z24 block is 2cm taller. The L20B oil pump and distributor will be used. The motor will need L20B motor mounts to tilt the motor to keep the intake/carb level and this will mean the Z transmission will need to be changed as well. The L intake will be much closer to the master cylinder/booster but should clear without the stock air filter.

Just some stuff to think about.




So what your saying datzenmike is that the z18et intake manifold will fit perfectly with the z24 head? If I could find a complete z18et with the wiring harness, I can turn my z24 into a fuel injected supercharged or turbocharged engine without any modifications?

#20 datzenmike

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Posted 06 November 2012 - 03:30 PM

So what your saying datzenmike is that the z18et intake manifold will fit perfectly with the z24 head?


No. What I said was...

All Z18/20/22/24 series have the same exhaust port shape and location.


What I will say about the intake manifolds is.....

The Z20 and Z22 intake ports are round (presumably the Z18 head is too) but the Z24 ports are square with rounded corners. A Z20 or Z22 intake will bolt up to a Z24 head, the bolt patterns are identical, but there is a small difference in the gasket shape. Here is a Z24 head and a Z20 below it. Note the Z24 has square-ish intake ports.

Posted Image


On a N/A engine this wouldn't be a huge problem. Boosting with a poor gasket match might be interesting. I certainly would recommend a gasket sealer used on this application.


I like this idea a lot. The Z series would seen to be quite detonation resistant, by design or luck I don't know. Dual plugs allow much less static ignition advance. L series are 12 degrees, Z24 is 3. Cross flow head means the intake ports do not have a hot exhaust port beside them and run cooler. (they are also easier to plumb for an inter cooler) The combustion chamber is as close to an efficient HEMI as you can get. Larger displacement. Why have a Z18ET or a CA18ET?????? Why didn't Nissan try a Z24(E)T?? 30% larger motor means 30% more power from turbo. (about 170hp on low boost)

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