LeonV

The reason the L28 doesn't feel as "rev happy" as the L24 is simply because of the cam. People love to get into B/S and R/S ratio bench racing, but it's pointless for 99% of the engines out there. Instead of spending time and money on all that, get a more aggressive cam and maybe triples. The lightweight flywheel is a good idea. Not sure why you want to mess with transmission gears since the late ZX 5-speed is already close ratio. Using 1st and 2nd from the early 5-speed completely defeats the entire purpose. A 3.9 diff, late ZX 5-speed, lightweight flywheel and more aggressive cam will transform an L28 without much effort.

Call Isky and speak with them about your requirements. They'll recommend the proper cam.

C'mon, all those polished parts have to be worth at least 70hp!

And you know this because you tested it? Sounds like fuel starvation to me, so test it as Steve suggests. This is easy. If that passes, then move on to ignition which may be a bit more tricky to figure out.

That sounds like fun, I wouldn't mind joining if you guys are okay with it!

It sure didn't come from the factory that way. The cam was changed at some point, does it have any markings on it? First time pulling the valve cover off in 40 years? I guess if the guy never did a valve adjustment, that would explain the need for a replacement cam...

External until '77, internal after that. There was no factory combination of both, at least not in the US. http://datsunzgarage.com/heads/index.htm

Happy to be of service!

Bad idea. "Low budget" and "200hp" don't mix well with the L-series. Don't expect that you can slap together a few "competition grade" parts and call it good. In fact, it very well may perform worse than stock. An "F" cam comes from a P79 head (280ZX), thus it is internally oiled. Source: http://atlanticz.ca/zclub/techtips/cam/index.htm Incorrect. Nissan cams are externally oiled up to '77, when they switched to internal oiling.

The valves are not always open. There are 3 instances of valve overlap in one rotation of the engine (360 degrees). A stock 280Z cam has 30 degrees of overlap. This means that in one rotation of the crank, overlap occurs in 90 out of 360 degrees, or 25% of the time. Take the valve cover off if you're unsure, and make sure that no cylinders have both valves open.

Wow, seriously? Just because you threw on "every option available" and didn't get close to 200, then no one else can? Riiight, moving on...

That engine is begging for triples! I bet you'd be near or over 200hp with a proper setup.

Or, you can get a brand new billet oil bar. http://forums.hybridz.org/index.php/topic/102501-spray-bar-mia/

Whether it's a boxer-6 or straight-6, the engine is naturally balanced (in the 1st and 2nd harmonic), so no advantage for the 911 there. I've not driven a 911, but got flogged around in an '80 at an autoX. I prefer the Z, but I can see the draw of the Porsche.

Wow, that Z belongs in a museum! You car is in amazing, original shape. I would say that of all first generation Z-cars ('70-78), the late 260Z is the rarest of all. They were only made for 3-4 months, and I've never seen one in such great shape.

I don't know about you but it's pretty easy for me to interpret, "fill to the plug hole." Not much lost in translation there. FWIW, there is a cartoon finger sticking a finger in the fill hole (MA-25, '81 FSM), so I guess it is important! Comment about "finger in fill hole" in 3...2...

Thanks Al, it's good to have some people who actually understand this. I was typing as you posted.

Not according to Nissan. Take a look at the FSMs again. I don't have time to sift through each one, so I'll use the '72, '78, and '81 as examples. Page GI-10 of the '72 FSM clearly states, "approximate refill capacities" in big, bold letters. Not any single transmission, engine and differential are going to be exactly the same. The 240Z is lacking in information however, and not just in this section. They assume you will fill to the plug. Page MT-5 of the '78 FSM does state to fill up to the plug hole. The '74 and up FSMs all state to fill to the fill plug, they never tell you to fill exactly "X" number of quarts, and the 240Z shares the same differential as other S30s and S130s, therefore, you should fill then all to the fill plug (notice I don't say until overflow). This is also clearly demonstarted in two photos (trans and diff) on page MA-25 of the '81 FSM. End of story. This is simple logic, folks. Gearboxes are designed to have a certain oil level in them, not an exact volume. Approximate fill capacities should only be used to make a decision on how much oil to buy. You can do whatever you want to your car, but if your procedure is incorrect according to the manufacturer and the recommendation is given out publicly (like an internet forum) then it must be corrected. Don't take it personally, you can do as you wish. I'm not telling you what to do, just informing everyone of what should be done by design. Unless maybe you know something that the engineers don't and have a good reason to change the procedure...

I'm pretty sure there are already provisions for foglights in the wiring harness, at the front of the car.

The 280Z FSM, as well as the rest of the Z FSMs state that the transmission and differential must be filled to the filler plug. Reference page MT-5 in the 280Z FSM, as it clearly states, "remove filler plug and fill transmission with recommended gear oil to the level of the plug hole." You quoted approximate numbers from the manual but did not state what it says about capacity, otherwise we wouldn't be having this discussion. The point of my reply is to clear up for others about how Nissan tells you to refill their gearboxes. Back on topic, no, you cannot overfill the transmission if filling through the filler hole on a level surface.

If you did, then you'd fill to the fill plug! Beermanpete is absolutely 100% correct on this. The FSM shows that the diff and tranny must be filled to the fill plug.

That is just an approximate amount. If you look in the FSM, it shows that it must be filled level to the fill plug.

I misread your post and apologize. I though you were going to buy a new switch. There is no need for your buddy to be immature about it.

Isn't this what I said in my first post? Did you search any of the terms I gave you? Hmmm...

I will definitely have a use for them! PM sent.