Gav240z

Ok here's how I understand things. With a larger cam the duration is increased to which the valves are open this is ideal in higher rpm's because the engine needs to be open for longer to get rid of all the exhaust gases etc.. Setting the timing backwards would allow for the longer duration of valves being open? Not sure as I say I'm still trying to understand the concept. My 240z has 10:1 compression but the cam i feel is very mild as the last owner stated and I run out of power around 5,500rpm. It hits the stock power limit. So I wonder if my stock cam was just reground. I would very much like to install the 702 as I think it would be ideal for my car and driving. I can foot the $220 bill for the thing but I'm not sure how to install one and setting the timing I'd really like to learn etc. is it hard? is it best left to professionals? I belive my valve stem seals are worn out as it's a little smokey after idling and take off so I planned on replacing these anyway and while I'm at it installing a new cam would be on the cards. :classic:

It's like the "which head is best" discussion a while back, I had to try so hard not to make a comment which was inappropriate. As Alan said though take the measuring tape and check it out. The early Z boxes as far as I know were slightly different the rest should all be the same and interchangable. Good Luck.

Hey Alfa I actually enjoyed Physics at Uni but I only did first year I hear second is the killer. What Escanlon and Zkid are saying is correct but I'm still confused as to what you want answered George? I know your looking for a fault in the circuit and your looking for an Arc which is basically what Z kid said about welding I also did some welding :classic: . Not sure about your leads though..

Having a look at them they have all the makings of a Genuine Fairlady Z. They both have the L20 2litre engine, the 69 mdl has the different clock you'll notice and the valve cover has 2000CC written on it. The steering wheel coicides with the era of Z mesh grille and the rhd factor would mean that if it wasn't genuine someone has gone to alot of trouble to make it look like it was. THe 74 in my mind is no doubt however if anyone wants to be certain I would inspect them in person and not purchase directly over Ebay judging from pictures. Wouldn't mind getting my hands on the 69mdl :classic: .

Poor ZmeCruise always get's stabbed in the back but you did ask for it commenting on the Automatic. No offence BTW I like your ZX :cheeky: .

Drunkenmaster I know of a 240z for sale fairly cheap don't know if this is any use to u I was gonna have a look at it myself I have pics and the contact info.:classic:

I've always loved the RX4's really wanted one for a while and almost got one after my first 240z. A friend of mine had a Ke55 Corolla everyone used to think it was a rotor. My old 260z had no resonator and everyone always thought it was a rotor. But they make a definate sound and you know it's a Rotor always reminds me of a Lawnmower on steroids. I've never driven a rotor but what scared me about an RX4 was the maintenance on one. That and the fact that most RX4 Coupe's would have been thrashed to hell and back. Oh I do like the R100 also but I think i'll always be a Z man. Having owned a V8 and a Rotor does a rotor feel like it just doesn't have torque? I always imagine their small capacity to resemble a lack of torque but as I say never driven one. :classic:

I've always wanted to stick one under the cigarette tray. A Push button one like the BRE race cars would be awesome under there. Sorta like the "Go Baby Go" on the mustang in Gone In Sixty Seconds. :classic:

Hahahaha good point Tanny I'm currently studying Statistics at school as a subject it's so boring but it does teach you how statistics can lie etc.. Bambi that was a good one poor alfa. Don't worry Alfa we still luv ya even if you do drive a K Do you still get Fumes in it? I have a friend who's father drove a 200B and you could still smell it Good OLd Datsun.:classic:

See this post http://www.classicZcars.com/forums/showthread.php?threadid=7751&goto=newpost My dual exhaust system makes my Z the loudest I've ever heard coming in at 120DB to give you an idea on that take Mick's 95.8 db and for every 3 db you double the sound intensity. It's great if your young and stupid like me . No but seriously it makes my car feel like a race car and the Carpark attendants hate it. Bad things about it being this way is that it attracts attention from everyone young guy with a 4cylinder car. I haven't had any trouble from the boys in blue but I like to think I'm a sensible driver and only flaunt it when it's for my amusement not for others. One day I'll get caught but I have an interchangeable muffler that will make it way under legal limit. Cheers. And if you want the to go with 2 pipes do it they sound great and the Works style down the middle looks fantastic.

If your talking about the one that goes from the engine block and to the carbies it's there because u will end up making the inside of your engine clogged up with sluggy oil. Well so I believe.

Hi Trex I did not install the exhaust system it was definately a custom job done by the previous owner. I remember seeing the ad for the car and seeing dual exhaust and wondering if it was 1 on 1 side and 1 on the other. I didn't know it would be the Works style till i saw it and me and PO both love it. I will try get some pictures soon I should really buy a digital camera. The setup is so that from the extractors you have two pipes 1 for 123 cylinders and the other for 456. It only has 2 resonators 1 on each pipe no muffler, for roadworthy condition I had to make it quiet and I got it custom made so that just before the diff there is a point where I can change the end of the muffler to single pipe and have it bolt up to the original position. This is to keep law enforcement off my back if I ever have to get it tested. Loud hell yeah!!! I had it measured at 120DB at 4200rpm. But I luv it and it's probably the loudest car in melbourne with an exhaust system on it. :classic:

For those who put up with the exhaust fumes in their Z here's some incentive to fix those gaskets and rubbers and replace those rubber bungs. Found this at the following website. http://sites.ninemsn.com.au/minisite/testaustralia/drivingbelieve.asp TRAFFIC POLLUTION DAMAGES MEN'S SPERM Traffic pollution damages sperm and may reduce fertility in young and middle-aged men, reveals an Italian study of motorway tollgate attendants. The attendants, who spend six hours a day sitting in a roadside booth, showed poorer sperm quality than men of the same age living in the same area but not exposed to the same level of exhaust fumes. Researchers blamed nitrogen oxides and lead for the adverse effects. (source: NewScientist.com news service)

The Vacumm advance hose to the distributor is important for acceleration and prevention of pinging. The heater hoses through the intake manifold help warm the car at start up and the quicker an engine warms up the longer it lasts. However it's not overly important. :classic:

But that place in Australia does a very good job. It will looks as good as new and they look for people from the US as customers. :classic: