5003 Need Help

Well to start off i have a 1980 datsun 510. Some info about the car, it only as a 60k miles Big%20smile

, and the body as some rust on the fenders. Now back to the problem, well i want to have the same motor in the car, but i want to get more power out of the Z20 motor in it. please help !!

Drive It Like You stole it

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here's a recap:
So you have a Z20S NAPS motor with a carb? It stands for Nissan Anti Pollution System, I like to call it the Nissan Anti Performance System (sorry) The problem with the Z series engines was that the head design and valve geometry does not lend itself well to improvements. There is little room for larger valves, and increasing their lift will make them hit each other. Although it is a cross flow head there is a sharp short radius turn on the intakes, which also limits good high RPM breathing. The purpose of this head was to limit emissions and high end performance was not intended.

Now the good news. If you take the head, and timing gears, chain and cover off an L20B engine and install on your Z20 engine you now can use all the performance equipment designed for the L series engines. Headers, carbs, side draft intakes, hi-perf cams, oversize valves, after market springs etc. The Z20, like the L20B have a fully counterweighted crank, good for smooth high reving. The Z22 and Z24 didn't.

If you are sticking with the Z20, and can find an '80 or '81 200sx, you could easily swap the multi port fuel injection onto it, making it a Z20E engine. An improvement in driveability over a carb. With this set up you could fab an exhaust manifold for a turbo (there's lots of room on the exhaust side for one) but lots of work needed.

The Z20 had two big brothers... the Z22 and the Z24. Neither were screamers but produced huge torque at lower speeds, where most driving is done anyway. The Z22 did come as an S (carb) and as an E (EFI). The Z24 were truck (torque) motors with carbs and later with throttle body injection (Z24i)

The Z22 and Z24 will drop in, the Z24 is about 3/4" taller that the Z20, but would be a huge gain in go power. The L series head swap would be some work, plus you would have to find the performance parts for it.

Some things to think about.

just in case you wanted to read it somewhere else...

71 Datsun 510
71 Datsun 521

DAT B-day BBQ

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Author	Message
INFAMOUS 510 Novice Joined: 27 February 2007 Posts: 1	Topic: Need Help Posted: 28 February 2007 at 10:51pm
	Well to start off i have a 1980 datsun 510. Some info about the car, it only as a 60k miles, and the body as some rust on the fenders. Now back to the problem, well i want to have the same motor in the car, but i want to get more power out of the Z20 motor in it. please help !!
	Drive It Like You stole it
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71-521 Expert Joined: 24 July 2005 Posts: 1522	Posted: 28 February 2007 at 11:51pm
	Welcome.... I think DatzenMike answered your question here: http://forum.ratsun.net/showthread.php?t=194 maybe it wasn't the answer you were looking for... hope you figure it out...not many boards left to ask the same question on.
	71 Datsun 510 71 Datsun 521 DAT B-day BBQ
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71-521 Expert Joined: 24 July 2005 Posts: 1522	Posted: 28 February 2007 at 11:56pm
	here's a recap: So you have a Z20S NAPS motor with a carb? It stands for Nissan Anti Pollution System, I like to call it the Nissan Anti Performance System (sorry) The problem with the Z series engines was that the head design and valve geometry does not lend itself well to improvements. There is little room for larger valves, and increasing their lift will make them hit each other. Although it is a cross flow head there is a sharp short radius turn on the intakes, which also limits good high RPM breathing. The purpose of this head was to limit emissions and high end performance was not intended. Now the good news. If you take the head, and timing gears, chain and cover off an L20B engine and install on your Z20 engine you now can use all the performance equipment designed for the L series engines. Headers, carbs, side draft intakes, hi-perf cams, oversize valves, after market springs etc. The Z20, like the L20B have a fully counterweighted crank, good for smooth high reving. The Z22 and Z24 didn't. If you are sticking with the Z20, and can find an '80 or '81 200sx, you could easily swap the multi port fuel injection onto it, making it a Z20E engine. An improvement in driveability over a carb. With this set up you could fab an exhaust manifold for a turbo (there's lots of room on the exhaust side for one) but lots of work needed. The Z20 had two big brothers... the Z22 and the Z24. Neither were screamers but produced huge torque at lower speeds, where most driving is done anyway. The Z22 did come as an S (carb) and as an E (EFI). The Z24 were truck (torque) motors with carbs and later with throttle body injection (Z24i) The Z22 and Z24 will drop in, the Z24 is about 3/4" taller that the Z20, but would be a huge gain in go power. The L series head swap would be some work, plus you would have to find the performance parts for it. Some things to think about. just in case you wanted to read it somewhere else...
	71 Datsun 510 71 Datsun 521 DAT B-day BBQ
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