Z22 or Z24?

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Bloodman324
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Z22 or Z24?

Postby Bloodman324 » Tue Jul 12, 2011 7:57 pm

Quick question: Whats the difference between a Z22 and a Z24 engine?


Liquidnails
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Re: Z22 or Z24?

Postby Liquidnails » Tue Jul 12, 2011 8:57 pm

Main difference is Displacement. 2.2L vs 2.4L, as well as z24 makes a bit more hp.

Not sure on internal differences.

z22 was only available in the 720 from 80-82. z22 is less prone to headgasket failure, though both are regardedas very reliable engines

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Bloodman324
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Re: Z22 or Z24?

Postby Bloodman324 » Wed Jul 13, 2011 9:06 am

Ahh i see, alright thanks, and thats good to know about the head gasket failure. I wont need to worry to much about that now. Still, i have the Z22, and it still gets up and goes when you want it too. Im surprised at how much power these trucks have with just a stock 4 banger haha

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PEZi
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Re: Z22 or Z24?

Postby PEZi » Wed Jul 13, 2011 10:43 am

You're probably the only person to ever say these 4 bangers make power... LOL

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breadbox
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Re: Z22 or Z24?

Postby breadbox » Wed Jul 13, 2011 11:58 am

z24 have a longer stroke.

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Bloodman324
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Re: Z22 or Z24?

Postby Bloodman324 » Thu Jul 14, 2011 10:52 am

Hahaha well i went from a not so good running 89 Dodge Ram 50 with a 2.6L 4 cyl mitsubishi engine, and lets just say that if i shifted down a gear and mashed the pedal, It would not have any acceleration untill like a minute with it floored, but with this truck, you mash the pedal and it goes haha I know that the 4 cyl motors dont produce much hp unless they have a turbo, but these little trucks can go, if the engines in good shape.

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Re: Z22 or Z24?

Postby PEZi » Thu Jul 14, 2011 1:39 pm

Hahaa... I know what you mean... mine runs great. The problem is I am used to 500hp builds, so even in top shape the Z24 just doesn't scoot too well

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breadbox
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Re: Z22 or Z24?

Postby breadbox » Thu Jul 14, 2011 2:31 pm

Yeah was looking at the ratings for the z24 yesterday. something like 130hp at 2800 and 103 TQ at 4800

For reference the ka24e has 140hp 5600 and 152tq at 4400.

Makes me question why I rebuilt the z24.

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Re: Z22 or Z24?

Postby Bloodman324 » Thu Jul 14, 2011 3:36 pm

Ahh haha i see, thats cool, and still, 130hp is pretty good, in my book anyways lol but im thinking, maybe putting a turbo kit on it, get a little more hp, idk haha

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breadbox
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Re: Z22 or Z24?

Postby breadbox » Fri Jul 15, 2011 9:02 am

:cool:
Image

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PEZi
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Re: Z22 or Z24?

Postby PEZi » Fri Jul 15, 2011 9:48 am

breadbox wrote:Yeah was looking at the ratings for the z24 yesterday. something like 130hp at 2800 and 103 TQ at 4800
got those backwards man.... 130 TQ and 103 HP... you got the RPMs right, though.

Remember, however, that is the rating at the crank on a brand new well maintained Z24 at sea level. AKA, real ratings this day in age are more like 90 at sea level, 80 at an altitude like mine. Add in the fast that those numbers are still at the crank, and you're looking at like 60 WHP for a stock Z24. I've actually watched the KA in a hardbody pull 68 WHP at my altitude. Thinking up here, a stock Z24 would pull 52-55 WHP.

The torque on the other hand is quite nice. Torque is what gives you acceleration, and these trucks make it quite well. All that means is you'll run out of any sort of useful acceleration by 4,000RPM... which most of you have probably realized.

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Re: Z22 or Z24?

Postby Bloodman324 » Fri Jul 15, 2011 5:42 pm

Ahh man that turbo's badass, where did you get it at? how much? and is it fairly easy to install? True true, i kinda figured that after like 30 years some horses had gotten away, but thats still not bad i think.

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Re: Z22 or Z24?

Postby breadbox » Sun Jul 17, 2011 8:39 am

I got it off my friends S13 SR hatch. Traded him a smaller one and his wastegate for a better setup for him.

So I'll say I paid like $300 or so then. Once again its a holset HX35w with a welded gate. Its a twinscroll so its definitely not getting used with a log manifold, I want to find or build a twinscroll manifold and throw that turbo on a KA24e. It would easily throw down 300hp on a well tuned exhaust system on moderate boost.

But if I were to turbo a z24, I would just use an ebay t3/t4 and build a log manifold and I am sure they have weber blow through box attachments.

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Re: Z22 or Z24?

Postby Bloodman324 » Sun Jul 17, 2011 8:41 pm

Nice, but i think before i try and put a turbo on my truck, im gonna fix some things first: Tune up and Rebolt my header, cuz its falling off, bolts broke off so its pulling away from the motor, making it loud. will that hurt anything?

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Re: Z22 or Z24?

Postby PEZi » Sun Jul 17, 2011 9:16 pm

I wouldn't drive it too much with the header coming off.... could mess with the valves.

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Re: Z22 or Z24?

Postby Bloodman324 » Tue Jul 19, 2011 10:56 am

Well its in the shop as of yesterday getting new hardware for the header. Im hoping nothing is damaged and that i get it back soon haha cause my dad doesnt like me driving his big Dodge haha

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Re: Z22 or Z24?

Postby swimmerbob » Thu Jan 19, 2017 1:48 pm

someone mentioned the Z22 was used in 80-82 720 trucks- incorrect information. that motor was used in all gasoline 81, 82, and 83 720 trucks. the 1980 gasoline trucks used the L20B, and the 83.5- 86 gasoline 720s used the Z24 engine, except for the 720 MPG models which used the Z20 engine. you're welcome.

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Re: Z22 or Z24?

Postby swimmerbob » Thu Jan 19, 2017 2:25 pm

FOR the stroked L20B motor (Z22 CRANK), I used the U60 block (it has the race-preferred crank ventilation system), the tough N87 cast L-series pistons, N85 rods shortened to 148.5mm c-to-c, and the W53 head ported, bowled, and the 35mm and 44mm tulipped valves fitted. Some eyebrowing to the head, and to the tops of the block bores adjacent to the intakes. Floating pins are a waste of time and money on a street motor- the pressed-in stock pins are fine. Recommended street fuel system is 46mm E88 L24 carbs with early U20 slides, needles, and nozzles on the aptly- ported 220 manifold. I used a shortened early L24 air cleaner horn fitted with the SSS air element and air cleaner shell. In a pinch, a shortened early L24 air cleaner shell works OK- the Tsuchiya SSS air cleaner assemblies are getting rare. Head and rod work is getting extremely expensive, as are those tulipped valves... but all still worth the extra money and effort. Happy motoring, guys!


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