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datzenmike

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Everything posted by datzenmike

  1. Heads below are upside down. Z24 shown at top. Has the squarish intake ports. Ignore the injector notches, I put those there and the port matching and polishing. The Z24 never had a mechanical fuel pump so mount area is not opened. Below is a Z20E & S and Z22 E & S head. ALL had factory injector notches. The Z20/22 could be used with a mechanical fuel pump but most had block off plates. Below... W04 head at top shows the exhaust ports are smaller than the Z20S head below it, is another reason to not use this head unless wanting a high compression engine.
  2. If you are expecting... A magical increase in power.... forget about it. ERG is off during full throttle use, so performance remains the same. A magical increase in mileage... forget that too. There will be a slight increase in throttling losses without EGR that might be measurable, perhaps not. At the best things will remain the same.
  3. There's no relay, everything is operated by a vacuum signal. The higher the engine load the more EGR is introduced. It's varied by a ported vacuum signal from the carburetor. At wide open throttle the vacuum signal is too weak to open the EGR valve. At part throttle above idle the introduced EGR takes up a small volume of space normally taken up completely by fuel and air. This reduces engine output slightly but more importantly reduces peak engine combustion temperatures that form NO. The loss of the EGR would allow the engine to produce more combustion heat and that, might cause pinging. Later Z24 engines have a BPT or back pressure transducer that uses exhaust back pressure as a better means of determining engine load. EGR reacts more accurately to exhaust pressure.
  4. Nothing happens. It might ping slightly but I doubt it. EGR is inert exhaust gasses with no oxygen in it. All it does is take up space in the combustion chamber normally filled with gas and air, and this would slightly lower power (what it does is lower peak combustion temperatures to prevent oxides of nitrogen forming) but you won't notice because there is nothing to compare it to. If there was any loss you would automatically add more gas pedal input. EGR does not affect performance because there is no EGR at wide open throttle WOT. There is none at idle and there is none while the engine is cold and warming up.
  5. The VIN and model year started in 1980 which would have been an A, B=81, C=82 and so on. I (i), O (o), Q (q), U (u), Z (z), or the numeral 0 are not used to prevent confusion and Y=2000. The alphabet runs out in 2000 and 1 is used for 2001, 2=2002 and so on till 2010 when it reverted back to A
  6. What do you mean 'they voted on it'????? Trump picked the board that voted on it so it was rubber stamped. Made himself chairman to boot.
  7. https://ratsun.net/classifieds/item/2441-datsun-a14-engine-for-sale/
  8. I was hoping that would help but that last few numbers are just a sequential production number. J......... Japan N........ Nissan 6......... truck or commercial vehicle. M........ engine Z22 gas D & 0......... 720 model 1.......... reg cab (2 long bed, 6 king cab...) S......... 2wd (Y 4x4) X......... check digit B......... Model year in this case '81 W........ assembly plant Kyushu 012949 sequential serial number
  9. In my notes on this picture I wrote "Up to (Sept) '65 320 or 520"
  10. What a fucking asshole. His ego knows no limits.
  11. Ask Thomas Perkins https://ratsun.net/profile/54542-thomas-perkins/ what Rancho? shocks he had installed on his 720. Isn't the tire size and pressures on a sticker on the door jam or maybe the glove box lid? The '84 FSM says 195/75R14 for most models with the 185s the least used for long wheelbase automatics. I think hard tire compound and increased handling are mutually exclusive.
  12. Sounds like the fusible links. Any chance they are actually Brown and look kind of reddish??? Better get a picture, I think someone has messed with them. If they are Brown these go to and power the ECC for the electronic carburetor... not good.
  13. 720s came with front sway bars. The 720 never had a rear sway bar and adding one just increases under steer at the front, unless corrected. Spend the money on a good set of tires. Biggest handling bang for the buck, is new high performance shock absorbers.
  14. Keep it Nissan. Mixed marriages rarely work out. Check out an A series engine from a '74-'78 B-210 or '79-'82 210 (B-310) and a 60 series 4 or 5 speed to match. They are tough, 6 main bearing compared to the 3 on the J series. Will rev to the moon if needed and if you have the money, lots of go fast stuff.
  15. I believe the L521 and PL521 grills were the same. The PL521 still had a manual choke in '71 but changed to electric for '72. That would be more definitive. Car number 350,001 rolled off the line February '70 Car number 587,101 rolled off the line May '71. That's 15 months of production and 23,7100 units and time for some assumptions. That's 15,806 units average per month. The reality is very +-. That's 6.3 months before May '71 or middle of December '70 making this a '71 model year for car number 487453
  16. datzenmike

    Crazy tick

    In the morning you'll be able to see the problem. Sound repetition was very slow, about the same as a wheel turning. If you can guess which side is louder and if front or back Start there.
  17. Then any A10 with air con will have one of those. Just an option.
  18. Datsun A14s and A15s should fit also. Six main bearings, high revving, durable.
  19. Kimberly. The '78-81 A10 (HL510) has a rubber bellows similar to yours called an actuator. 27660-W5600. The rubber part looks the same.
  20. 4x4 bars are not interchangeable with 2wd. All 2wd will swap all years, same with 4x4s. ALL 2wd bars are 0.94" diameter and 32.38" long ALL 4x4 bars are 0.87" diameter and 38.66" long. Yes the 4x4 bar is thinner, probably to allow more articulation when off road? All 2wd should be the same bar. Long wheelbase trucks (king cab and long box) and HD (heavy duty? perhaps Cab/Chassis) have a different part number but ALL (2wd and 4x4) use the same rubber bushings so the diameters the same. Maybe the stiffness is in how the metal is tempered??
  21. I don't read guns, air planes, bicycles, there are a few others. Just not interested in them but others are.
  22. I hate links...
  23. In the mid '60s I was in a 425 Oldmobile. If you floored it long enough the gas gauge started dropping... but it was the gas sloshing to the back of the tank from the 'gee' force of acceleration.
  24. Has to be 17 characters long. JN6MD01SXBW01949
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