Engine & Drivetrain
Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.
5,574 topics in this forum
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- 3 replies
- 1.3k views
I have Just put Weber dgv's, MSA 6-1 header, 2.5 full exhaust on my 73 240z. It has not been tuned yet, except what I could manage, but I am wondering how much that could affect the performance. How much horsepower could be hidding behind my poorly tuned carbs, unadjusted valves and poorley tuned ignition. I ask this question because I am not sure if the l24 has enough potential to get my car to where I want it. I know the l26 has a different crank and that increases disp. The l28 bored a little bit. Both of these options dont seem a reality to me. I may be able to get a bud with the tools to do an engine swap in a weekend, but I probobly can't be taking my whole b…
Last reply by ardKore, -
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Cam towers
by 26th-Z- 3 replies
- 1.4k views
Will these towers fit on a E31 head? Can anyone give me a little advice on the technical info about these? Is this a good deal? And where can I find new ones? http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2420029459&category=33614
Last reply by 26th-Z, -
Vapour Lock
by raman- 5 replies
- 1.9k views
Has anyone had really bad Vapour lock on there 240Z. I cannot drive the car if it is over 28 Deg C. does anyone have any ideas on how to fix this. My car is stock. Ben 1972 240z
Last reply by raman, -
Aussie Cams
by raman- 10 replies
- 2.2k views
I am about to buy a new Cam, and I am just trying to find out what cam shafts are available in Australia, and if they are worth the money. I was looking at a Crow mild cam as i do a lot of driving. any thoughts? Thanks Ben 72 240Z
Last reply by raman, -
- 3 replies
- 1.5k views
I am experiencing a heavy exhaust odor from my 280. I think it might be a crack near the manifold. Just wondering if anybody has any suggestions on how to tackle the problem. I am hoping I can fix it myself.
Last reply by NH-75-Z, -
Smokin Zed
by biker- 5 replies
- 1.3k views
I have noticed lately that my poor little Zed is starting to blow a bit of blue smoke under acceleration. I was hoping that it was fuel but something tells me it is probably oil.. Power is still good and oil pressure has no noticable change except at idle where it seems to drop a bit lower than normal and I can smell oil fumes in the car. I usually associate blue smoke with either rings or valve seals. Anyone got an idea on how to eliminate one or the other. Any other suggestions as it seems to be more noticable since I changed the coil to a higher voltage.
Last reply by biker, -
- 4 replies
- 1.3k views
I have a 75-280 w/91K on it. Got it 2 months ago from So. California. Have spent time getting it tuned,timed,etc and it runs real good. But has developed oil smoking real bad on a long decelaration mode like coasting down a hill. Have done compression check twice, range from 150 to 125 or 130 in #'s 4 and 6. Vacuum is 16"/HG . I adjusted the valves(1st time), no noticiable change. It does not smoke on start up. So what do you all think?? Valve stem seals or lower end IE: rings:cry:
Last reply by beandip, -
- 13 replies
- 2.3k views
Hi gang, I just drove the Z 2000 miles in two days under a fairly heavy load (try about 700 pounds of baggage) and it performed excellently, I'm proud to say. Only problem is, I have a slight clanking from my engine when it runs now. I'm assuming its my valve clearances since that's what it sounds like. Does anyone have any good tips as to how to adjust the distances the easiest? Like most things, I know most people have their own little trick; I've never done this before, so I'm looking for some good information. Thanks a lot!
Last reply by Dreco, -
- 5 replies
- 1.9k views
I've read the Australia Z car clubs DYNO nite with different Z cars with the different setups.*very interesting* Have many people had there Z car dynoed OR taken it to the strip? If so can you please list your different mods, stuff like Heads ie:which head,how much porting(details),valve seats(3 angle etc),polished?-compression etc Cam:how big? lift? brand? details on cam timing(verier wheel?) Carbs(or injection):details of jets/needles /ported manifold? exhaust: size/press bends/mandrell? ignition:type/which dizzy/total advance etc?(sparkplugs etc?) Pistons: Std/flattop aftermarket,oversize Other info:stroker cranks/turbos(boost/size of turbo etc) and of course how the c…
Last reply by Ben, -
- 7 replies
- 1.6k views
I'm getting into the nitty gritty of cleaning my engine while it's out of the 71. Thing is, I want to take the head off to do a better cleaning and paint job and I'm not sure if I should put in the new cam I purchased now, or later once I'm sure the engine will start easily. My reasoning here is because I'm changing the stock distributor to one from an 81-83 280zx, adding a new performance coil, and rebuilding the carbs. Since I've never gone this far with an engine and I removed and replaced the wiring harness I'm probably not going to get the thing started first try. Would repeated cranking ruin the new cam when I'm tracking down little problems here and there?
Last reply by 240ZX, -
- 4 replies
- 1.1k views
hey guys, i got the cam timing thing figured out. looks like i was a tooth back on cam timing. so now the thing seems to run half way decent but for some reason the fuel pump eccentric is hitting the valve cover. i'm wondering if i put the sprocket on backwards. it seemed to be the only way to make sense to me but maybe i'm wrong. the way it is now, the shoulder is facing forward. there doesn't appear to be enough clearance for it to be turned around but since i didn't pay adequate attention, like i should have, during disassembly i don't know:o need help here, please! also, i don't know if this is related but it also seems as though the cam cover is hitting somet…
Last reply by clutchdust, -
- 2 replies
- 1.2k views
Most of these questions are because I had to custom fabricate (Jimmy rig) some parts on my car because of little things i forgot or incompatabilities. OK The output on the waterneck to my intake manifolds is blocked off... Is this ok? The vacume hose to the distributor is not hooked up, but the manifold hose is plugged (with a bolt and a tightly clamped hose clamp:ermm:) And lets see, I took all of the AC out, well most of it, is there anything i need to be carefull of because of that? The heater will come out soon too. Also I have the 73 with all the smog stuff (untill I ripped it all off and put dgv's on:devious:) so there is a coolant hose that runs arond the ba…
Last reply by thefastestz,
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