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- From: erik@peewee.nwc.navy.mil (Erik van Bronkhorst Code 3814 Phone 939-1421)
- Subject: Re: 240Z-280Z Problems
- Message-ID: <BxM7Mu.Dxn@avalon.nwc.navy.mil>
- Sender: usenet@avalon.nwc.navy.mil (NWC News Admin)
- Organization: NAVAIRWARCENWPNDIV, China Lake
- References: <403@rd1.interlan.com> <BxKyAD.Fu@news.cso.uiuc.edu>
- Date: Thu, 12 Nov 1992 18:06:30 GMT
- Lines: 58
-
- In article <BxKyAD.Fu@news.cso.uiuc.edu> mchaffee@ux4.cso.uiuc.edu (REAL LIFE?!?! HA!!) writes:
- >tavernin@rm1.interlan.com (Victor Tavernini) writes:
- >
- >>I'm thinking of buying a 240Z, 260Z, or 280Z and was wondering if any
- >>specific model/year had any serious problems ... besides rust :-)
- >
- >The earlier the better. IMHO, the best Z-cars (the new 300 excluded-maybe)
- >are the very first ones, that is, the 69-70-71. After 71 (or was it 72?)
- >emissions controls just slogged down that lovely 2.4-liter engine and made it
-
- 73 was the smog-dog year for the 240. It is also the last year they were
- made. The 260 was made in 74 with the same engine (+200cc whooopeee) as
- the 73 (smog-dog carbs). The 75 260 had fuel injection. Neither worked
- very well. In 76 the first 280 came out with a brand new injection system,
- engine, and rear suspension. Performance buffs prefer the lateral or
- "Chapman" rear struts of the 240 (&260) to the semi-trailing arms of
- the 280s. All 280s including ZX have the same dumb semi-trailing rear susp.
-
- >most icky to drive. Datsun's solution: Bigger engine, heavier car, no more
- >power - the 260Z. STAY AWAY. The 260 wrecked the original concept of the 240
- >so well, Datsun took it a step further with the 280Z. The emissions controls
- >were awful from '72 (or was it 73?) right up until they started using EFI. I
- >can't remember whether there were any Z's (as opposed to ZX's) that used EFI,
- >but I still think the best choice is a 70 or 71 (the 69's are VERY RARE).
- >Even though the 280 accelerates a little faster, the 240 is so pleasant to
- >drive. It handles better due to less weight and it's more fun to drive due
- >to razor-sharp throttle response.
-
- According to all published test results I have seen
- the Datsun Z cars *decreased* in acceleration linearly with time from their
- inception until the first 280ZX Turbo appeared. In other words, any stock
- 240 is quicker than any stock 260 or 280. The ZX Turbo broke the cycle
- beating the early 240 by a tick.
-
- >One caveat on a Z: My dad has an early '71 240Z, and overall it's been remark-
- >ably durable and stuff (admittedly, he IS the original owner and it only has
- >40,000 miles. It's not for sale.) but there's a problem with the head gasket.
- >If you lug the engine, it likes to blow head gaskets, so remember: If you want
- >to pull serious power, make sure you're above 2000-2500 RPM when you do it. And
- >make sure you use premium gas. It really needs the octane.
-
- True. 240s don't *make* any power below 3000 anyway so if you know how
- to drive this should not be a problem. They need all the octane you can find.
- They can be a bitch to get started on cold mornings, this is the one nice
- feature of the 280. With their FI they start right up and you can actually
- drive them without having to warm up for 5 minutes. Plus the 240 takes
- another 10-20 minutes of stop and go driving (probably less if freeway) to
- warm up enough to respond when you put your foot down...
-
- Although I have not heard of (nor had) any head gasket problems, they
- are known to occur in engines with iron block and aluminum head as the
- Z cars have. The difficulty is the difference in expansion rate and amount
- between the two materials. I maintain that if the head and block are
- sufficiently flat, the head torque is properly maintained, and the engine
- is properly warmed up and driven, there should not be anything to worry about.
- --
- Erik van Bronkhorst KC6UUT DoD#4342585443 AMA#[classified]
- "Truth is false and logic lost, now the fourth dimension is crossed..."
-