Engine & Drivetrain
Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.
5,549 topics in this forum
-
- 0 replies
- 832 views
I think this is a drivetrain-related thing, although it's mostly about the speedo gauge itself. In Roadrally, you calibrate your odometer when you run the first leg, which is about 10 miles. The Rallymaster gives you the exact mileage and you calculate your "correction factor." But the testing I've done so far indicates that the odometer isn't as great as you might think... At 30 MPH, the odometer matches the distance you drive very well. At 60 MPH, it's only 90% on; it goes up by 0.9 miles for every 1 mile on the highway (assuming the mile-markers are correctly spaced.) It gets worse as you go faster. If you time yourself for the miles, you get 2 minutes to a mile @3…
Last reply by TomoHawk, -
-
- 35 replies
- 12.5k views
Hi all, My second project this weekend was that I FINALLY got around to scoping my ignition. My engine still has a slightly rough idle (although at times it will smooth out beautifully), the exhaust puffs randomly (random misfires), I sometimes get a light backfire, and my tach needle gets these spasms -- twitching to higher values. At idle, the twitches are about 100 RPM in magnitude (with no change in engine speed), and on acceleration, the needle sometimes bounces wildly over a 500 to 1000 RPM range. Interestingly, the needle doesn't necessarily bounce wildly at steadily higher engine speeds. It's mostly when engine speeds are rapidly changing. So here's a trace …
Last reply by FastWoman, -
- 11 replies
- 1.7k views
Recently I have installed a 5 speed into my 77 280z. At the time, I put in a new clutch, pressure plate, and throwout bearing. The clutch and pressure plate were new in a plain brown sealed box but were at least 20 years old. (Came with the car with other "spare" parts.) Everything went well now for a couple of months. Recently it has become difficult to shift from neutral into gear and reverse seems to be the worst. The clucth isn't disengaging enough and the tranny wants to grind. Double clutching seems to help when rolling. So, I changed out the clutch master and the slave to be on the safe side. No change. There is about a full inch of movement on the clutch fo…
Last reply by IdahoKidd, -
- 9 replies
- 2k views
I have a 240z and I recently put an l28 in and replaced the fuel injection for carbs. I have everything hooked up, and I got a new fuel filter and I got a new mechanical fuel pump, but when i start the car I am not able to start it. When I spray gas into the carbs and suck up some fuel through the fuel line I am able to start it for like 3 seconds but I am not seeing any gas come up through the fuel filter. What should I do at this point? Could there be a problem with something in the engine that is preventing the pump to work? does the l24 have something that an l28 doesn't have that allows it to use the mechanical pump instead of an electrical? Any help would be much ap…
Last reply by Tophu530, -
- 5 replies
- 2.4k views
ok so i have a 72 240z that i just swapped a rebuilt l26 into with 1971 round top su's the car is running awesome but something sorta weird is going on. the tube that comes out of the crank case to the pcv valve isn't exactly the same as on the l24 and their is a rubber line that went to it on the l24 that that is about the size as a vac advance hose that no longer has a place to hook up. it comes from the drivers side fender well. there is one hose coming in from the back of the car to a splitter and two coming out. the bottom one was never hooked up but the top one went to that crank case tube. now that this is not hooked up my breaks seem bad almost like the break boos…
Last reply by rjk629, -
- 9 replies
- 1.9k views
I'm in SoCal Ontario ..please call/text 909-224-4397
Last reply by esprist, -
- 20 replies
- 8.6k views
^what the title says. I'm having my 1970 240z's engine rebuilt and everything in the engine compartment completely restored to factory. If anyone has a pictures of restored or perfectly original 1970 240z engine compartments, I'd appreciate it if someone could post some.
Last reply by Mike B, -
- 8 replies
- 1.9k views
It's been awhile since I had to deal with this issue, so I thought I would throw out my plan and have you guys confirm my thinking. The car is an early '71. I currently have an '83 ZX motor and 5 spd in it. The flywheel is a 240mm from a 2+2 with a matching Nissan clutch. Auto adjust slave cylinder for the 5spd, with the ZX throwout bearing collar and fork. I am going to put the original L24 and 4 spd back in. I intend to put in the fly wheel, clutch, throwout bearing collar, fork and slave cyinder from the ZX set up. My understanding is that if you keep all of this the same, it will match up to either trans, correct? TIA, Marty
Last reply by Marty Rogan, -
- 6 replies
- 1.8k views
I was wondering if anyone out there has toyed with the idea of a copper intake/exhaust gasket? The factory and aftermarket gaskets seem to be either crap or one step above crap. I am considering having one produced and tested. The only problem I could possibly see would be the cost, but it would be worth it in the long run, especially for anyone running a modified Z. Your input is greatly appreciated.
Last reply by NismoZ, -
- 6 replies
- 1.4k views
Anyone ever had their throttle stick wide open? It's the second time it's happened......I suspect the thick rubber mats, but not sure......I can't make it stick when I try.......It'll really get your attention when it happens!!!
Last reply by Diseazd, -
- 2 replies
- 1.8k views
ive been doing some research. im swapping diffs. i put a 5spd in, and now ime going to the junkyard to get a new diff. i found out i have the r180. does the r200 use the same axles as long as its out of a z and not zx? i read that the short nose has the best posi is that true? what cars did those come on? . the junkyard in my area has alot of z's. i can get a diff out of a 300zx? im putting a v8 in. maybe 6 months away from now, so im wanting this to be the diff for the v8 swap. any advice you guys can give me, would be really great. i love this site. so helpful. you guys make things alot easier
Last reply by beandip, -
- 20 replies
- 7.1k views
Hello This is a very basic, newbie question (I think): I have never done an oil change on a 240Z before, but have done plenty on Hondas. Hondas have an aluminum crush washer for the oil pan drain bolt. This is a one-time use washer that you replace each time you drain your oil. Do Datsun 240Z's have a similar washer that needs to be replaced? Thanks.
Last reply by ajmcforester,
-
Recently Browsing 0 members
- No registered users viewing this page.