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Engine & Drivetrain

Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.

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Fuel Injection conversion? 1 2

October 23, 2003 by Driftin John
19 replies

4.2k views
Can anyone let me know whether it is reasonably possible and advantageous to install the Bosch fuel injection system off of a '76 280 ZX onto a '73 240 Z? I've got a decent degree of mechanical aptitude and good access to any equipment that I might need, but am I better off to just set my sights on a set of round top SU's and manifold from a '70-'72? I can pick up the ZX for $100 and use other parts anyway, just wanted to know if the FI is worth the effort. Thanks, Driftin John

Last reply by speedyblue, October 29, 2003
Pertronix or PertronixII

October 28, 2003 by zztom
9 replies

1.7k views
I'm gonna be one of those guys who switches from points and was looking for input on Pertronix. Is II better? Can original tach be used? I've got a 71 240, stock w/ header. Are there better options?

Last reply by zztom, October 28, 2003
Starting a sitting motor part.2 1 2

October 20, 2003 by drunkenmaster
14 replies

1.6k views
As a few of you would have read in my other post, i got the sitting motor started just fine, almost too fine, which is what brings me to this. The 260z with L28E i got running runs about 5 times harder than my 280zx daily driver. I know the 260z has a better head and its lighter, but the power difference is much more than this. I had gotten grudgingly used to the 280zx but this has opened my eyes to what its lacking, the 280zx is slow to pick up once you put the foot down and doesnt like to rev much over 3000-4000rpm, it makes more noise up there but not any more acceleration. Ideas on what could be wrong? It has an electronic distributor so it shouldnt be the case but i …

Last reply by Rusty1, October 28, 2003
Lost spark ignition systems

October 28, 2003 by santamaus
0 replies

2.5k views
What sort of benefits/problems are inherent with a lost spark ignition system? Has anyone here used the SDS ignition? What sort of trouble and/or success have you had with it? Did you combine it with their fuel injection? With another fuel injection? Thanks in advance, Chris

Last reply by santamaus, October 28, 2003
Timing question?

October 27, 2003 by m240
2 replies

1.6k views
I have a 71' engine and was wondering if all engines have timing marks on the crankshaft pulley because mine does not seem to. I looked in Haynes and it shows the timing marks but on mine it has the arrow on the block and a notch on the pulley. I've tried using a timing light to line up the arrow and the notch but the closest it gets is about 3 to 4 inches away from the left of the arrow. Is the notch 0 degrees or am I supposed to line them both up? I was going to try static timing it but without any gauge I didn't know where to start. I had posted before about this and someone mentioned that the oil pump might might be a tooth off. I just wanted to double check everythin…

Last reply by m240, October 27, 2003
dumb gasket question

October 27, 2003 by frankensteinZ
6 replies

1.6k views
Alright I am puting on an intake and exhaust manifold gasket. Do i put gasket sealer on it or not? :cross-eye Frankenstein Z

Last reply by Gav240z, October 27, 2003
RPM or DISPLACEMENT 1 2

October 23, 2003 by Tourniqet
14 replies

2.3k views
Another novice question probably. I have a 2.4 with dgv's and a 2.5 inch exhaust and I love the high RPM's... The Tach says it goes up to around 7000 and even more. I was racing a 2003 honda civic si, and I beat him on high revs alone. I want more power from my engine, and sone solid upgrades would probably be boring it ot to a 2.6 or boring and stroking to a 2.8. I have heard that stroking the engine will significantly lower the usable RPM. I just bought an e-31 head, and plan on inspecting it, doing some polishing and maybe porting. If I can find a good machine shop I may get it milled. ANYWAY I wanted to know if you guys had experience or opinions with different …

Last reply by Bambikiller240, October 24, 2003
Starting your car 1 2

October 22, 2003 by halz
18 replies

2.5k views
Well my 240Z has been in the garage for about a fortnight now (no, not the whole time!) and we are slowly building mutual respect for one another. One aspect of this is starting up from cold. I use the folowing technique: 1. pull on max choke 2. crank until it splutters on 2-3 cylinders 3. reduce choke to about 1/4 and crank again 4. Try not to use the throttle at all during this procedure. It always takes a min or so to get running and I assume this is due to a combinaiton or reasons...namley getting fuel to the carbs, getting the right choke position and probably due to old plugs/leads/points. When it does fire up it tends to idle ok but run roughly on less than six c…

Last reply by Mr Camouflage, October 24, 2003
Removing spigot/pilot bushing

October 23, 2003 by JMT240KGTR
2 replies

1.2k views
Guys, Misplaced the tool I had to remove this annoying little thing, this weekend I'm put another g'box in and need to replace it. I read a while back this can be done with grease, a driver and hammer? If anyone can help would be great, thanks.

Last reply by JMT240KGTR, October 23, 2003
Gas filling up air cleaner

October 23, 2003 by sahunt66
2 replies

1k views
Hello, I have a '71 240Z. The car sat several years in a my father's garage. I started it up and it runs fine except gas filled up the bottom of the air cleaner while it was running. What causes this? Should I take the carbs off and rebuild them? Or just use carb cleaner or something? What's a good source for a rebuild kit if I need to do that? I'm new to z-cars and have limited experience in mechanics; but I've done breaks, tune-ups, etc... Thanks!

Last reply by Daniel, October 23, 2003
carburetor velocity stack science

October 22, 2003 by EricB
3 replies

4.5k views
morning, very simply what is the science in choosing the right length of velocity stacks... is it purely as a result of testing on the dyno, are there formulas which one could use to figure out gains vs losses of different length stacks, etc... i've been searching around on the web and while i did find places selling them, i didn't find much explained about the science of picking the right ones... someone here care to help? -e

Last reply by Dtsnlvrs, October 22, 2003
Are L26 exhaust manifolds prone to warping.

October 21, 2003 by Rusty1
4 replies

1.3k views
Hi guys, I recently bought a 260z 2+2 (the +2 is because I have +2 children). The car is original and the engine has been reconditioned. There is a slight exhaust leak at the rear of the manifold and the rear stud is missing from the head. My mechanic thinks that a previous owner may have removed the stud to fit the manifold back on as it is possibly warped out of shape. Before I pull everything apart does anybody know if this is a common fault with the L26? Also can any Oz members adivse, is $150 au too much to pay for a set of second hand extractors.

Last reply by Rusty1, October 22, 2003