240ZX

I believe the unit pictured by Walter is in fact the proportioning valve, at least for the early Z cars that I'm familiar with. Mine has the same unit. Carl, the valve may not be connected to the front brakes directly, however, the line pressure to the front brakes and supplied to the input of the proportionong valve are the same pressure. Why? Because the diameter, travel, and applied force to the pistons in the master cylinder is the same. The pressure out of the proportioning valve is less than the input pressure....hence the proportioning. For the rear disc conversion, just remove the internal parts from the valve, as recommended. Works great for a street application.

Gawd, Just think for a minute what it would be like to drive that baby unabated! Oh, I'm getting faint..........

Excellent advise Stephen!!! I remember back, when redoing my 1970 tank, I had an intermitant fuel starvation problem, even after I had cleaned the inside of the tank numerous times. I finally went into the tank (with fuel in it) with a flexible bore scope and low and behold there was this little piece of stuff that would drift over the fuel pick-up line and stop the flow. Now removing the piece of stuff was another issue since the tank was installed. Oh well, live and learn.

Mike, It's a possibility that the ring may be made of SS. As an example...304 SS does have some magnetic properties, although not alot. One grade of SS (316L, used in medical tools and with alot of nickle content) has zero magntic properties because it has no carbon steel in it, as opposed to the 304 which has some. SS in the 400 series has even more carbon steel in it. And as one would suspect, the more carbon steel it has the more it will rust, although not as extreme as say A36 steel (very common structural steel). Anyway, I though this might help you all out. Just remember some grades of SS will rust and have magnetic properties.

Looking threw the auto trader last night, I came across a 1973 240Z for sale. I know zippo about the car but thought I would post it for anyone interested in calling on it. Southern California area...(562) 596-8920 The add reads; 1973 DATSUN 240Z, all orig, new int, exc paint, runs good, no smog required, at, $4500 obo

Who said anything about pulling an engine? 26th, are you trying to stir thinks up here? :laugh:

If what Chris said does not apply, then I would ask if you replaced your oil pump when you did your engine overhaul?

Well, you might want to be a little more specific about the actual key position (i.e., OFF, ACC., RUN, START). The pump should come on when you enter the RUN position. I'm not familiar with the EFI key switch assemblies, but think about it....if you have no fuel pressure (pump not operating) when attempting to start your engine, how do you suppose an engine will run without fuel? Again, in most cases, I believe the pump should be operating when the key has entered the run position. Someone else please add to this.

Just got off another car site and there was this posy about a US Service guy getting f'd over by a performance shop in Arizona.......name of the business is AMP Performance. Wow! I could hardly believe the support given to the poor guy. The post were coming in so fast that you could not even keep up with the read!!! I pitty (NOT!!!) the guys that own that shop. As they say...."What come around goes around. Has anyone seen this yet?

Hey Chris, My N42 has a mechanical fuel pump mounting boss. I wasn't aware that some L28's do not accommodate a mechanical fuel pump. Good info!

Are you getting married? Forget about the Z!!!! Just kidding. The L28, generally speaking, is the same as the L24 and will drop right in, just like the L24. Re: SU's....use the intakes and SU's from your L24, it's a common swap. Now as far as what you sould replace while the engine is out..........that depends upon how much you want to do, how much time you have, and how much you want to SPEND!!!! IMHO, considering your situation, stuff the L28 in and get it back on the road. When you have the time and inclination, do research on the subject. With access to the internet, you can get answers to any question about the Z cars you need answered. So, get married and worry about the Z car when the smoke clears. :tapemouth

It's a free country, do as you like. Most members here, I believe, are stedfast owners of original stock or slightly modified 6 cylinder Z cars. That's the reason we participate on this site. However, there is a site called Hybridz that focuses on Z cars with V8's and other transplanted engines. That's OK too if that's what you desire. Persuing input, regarding a V8 transplant in a Z car, on this site is going to get you alot of, well shall I say, interesting or otherwise different opinions. Trust me on this one!!! Anyway, if I may impose, do some homework (research) on the Z car before you jump off the deep end, for you never know now deep the water is until you look. As an owner of a 1970 240Z for 21 years, I can tell you these cars are a total hoot! And that's putting it mildly. Good luck with your adventure............

Ahh! This seems like a perfect opportunity to lay-forth some constructive criticism for individuals new to this site or any other car related sites. The regulars here will concur....I think. First off, this site has members with a vast amount of knowledge and or experiences regarding the early Z cars that will benifit people who are sincerely at thier ends for an answer. However, when people post questions and have obviously not taken the most rudimentry steps in thier information quest, such as making an effort to do a little research on their own, it is likely they will get responces that at first glance seem to be a little rude or they may get no responce at all. Having the ability to find this site and operate a computer surely implies that an individual has the intelligence to prepare themselves before asking questions. Let me put it another way if I may, when you pick up a dictionary you can't expect it to give you an answer unless you search through the pages for it. This site is no different. The key here is, if you are looking for something you have to look. No matter what you do in life, there is always a price to pay!!! I'll climb down off my little saop box now and wish you the best of luck in your search for knowledge. Oh, by the way.........try some pic-a-parts yards that deal have Z cars. P.S. This post is not intended to offend anyone but to provide a little guidance to new members. :classic: