Engine & Drivetrain
Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.
5,552 topics in this forum
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I have a 73 with 72 carbs...it has been an adventure getting it running, though it isn't running very well...my current project involves putting a muffler on the beast...I visited my local Nissan dealer and nearly died when told he wanted $170 + tax for the Nissan muffler to fit...................I declined........I have been hauling the decrepid old muffler in and out of the local Minute Muffler, Midas Muffler and everything else that sells mufflers hoping to find one that is approaximately the same size (that a cylinder about 13 1/2 inches long, 6 1/2 inches in diameter with a 1 3/4 inlet and outlet)...it goes w/o saying that NO ONE has a muffler to fit...the closest I'…
Last reply by Steve Weatherley, -
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Well I'm getting the HP bug here in the snow, the mind starts racing. I have a rebuilt L-28 short block (from my rusted out 77' 280Z) and a good E-88 head on my current 240. I would like to put the E-88 on the L-28 and install a MS cam (grind #17033) Lift int/ex .480 Duration In/Ex 274 I currently have 72SU's, Crane XR3000 ignition, and a headder on the engine. My questions are: 1. will the head/block combo work? 2. What will the approximate compression ratio be with a stock head gasket/L-28 has dished pistons. 3. According to Motosprots they recommend a complete valve job on the head and replacing rockers, springs and lash pads. Is this truly necessary? I understand…
Last reply by nwa240z, -
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I just converted my '73 flattop carbs to 70-71 SUs. But there is a hose barb coming off the top of the float bowl that I can figure out where it goes. Each carb has one. Thanks
Last reply by Phacade, -
- 2 replies
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My '73 had air conditioning sometime in it's previous life. By the time I took ownership most the condenser was gone, so I removed the rest of the components. My question is, can I replace the harmonic balancer/pully to a non-a/c type without having it balanced on the crankshft. In other words, are the balancer's internally or externally balanced. It is a rebuilt L-24.
Last reply by visionary, -
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This is a request for information concerning the removal of the intake manifold thermostatic value and abatement of the coolant flow through the intake manafold. I have disconected and discarded, for the most part, the emmisions systems connected to the fuel system. I was looking for tesitimonials on the removal of the thermostatic value and coolant flow through the intake manafold. My concern is low temperaature operation during the winter months connected with living in the northwest. Purportedly, the value is supposed to maintain a constant 150 degree temperature of the coolant through the manifold, however, I have noticed power loss at higher engine temperature op…
Last reply by visionary, -
- 3 replies
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at the risk of being a pest......I have succesfully installed a pair of 72 carbs, linkage, grose jets etc...even went out and bought a Unisyn (found that the car industy types no longer seem to know what a carburator (What it's not fuel injection? in the pursuit of the Unisyn; I was saved though when someone suggested I check out the motorcycle and snowmobile shops as they still work on vehs with multiple carbs...bingo $48.00 CDN later I had an Edlebrock Unisyn and it works great)... now onto the latest problem; the car runs OK...still doesn't idle too well . It has differant needles front and rear carbs ??, I have spares from the orig carbs, should I swith to the old ne…
Last reply by cdweaver, -
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I have a 73 with the stock flattop carbs on it. I was thinking about going to the round top SUs. Are the round top SUs from a Rodster compatible with a 240Z? Or do I need to stay with the SUs from a 240Z. And do I need to or should I also change out the intake manifold? What are some of the things that I need to keep an eye out for when doing the switch.
Last reply by visionary, -
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This was posted to our old tips forum by Trevor: I chased gas fumes on my Z for quite awhile. When I had it all apart a year ago I replaced all the fuel vent hoses with the genuine Nissan ones and I kept getting fuel smell. Part of it was a leaking seal around the fuel level sender which I replaced several times and the last time I noticed that the tank built up pressure inside awfully fast while I was resealing it. I had never noticed any pressure build up when removing the gas cap though. I checked the valve in the engine compartment where the vent line hooks up. And although it wasn't hooked up exactly right, it basically hooked up to the air cleaner and the intake to …
Last reply by Bambikiller240, -
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I have a '73 240Z project that is nearing completion (thanks largely to all the parts and advice from you all). Here is my specs so you may be able to diagnose thae problem a little easier. I have put an '81 L28 with the 5-speed in, '70 model SU carbs and intake. The car previously had a L24 and 4-speed with dual Webers when I got it. I ran poorly so I decided a new mill was in order. It previously had a mechanical fuel pump in the engine compartment and the original electric pump back by the tank. I got rid of the mechanical pump when the swap was made, and upgraded to a different electric pump (Was advised to get a Purolator 2-4psi, 30gph pump from Pep Boys, so I did). …
Last reply by Phacade, -
If the smog pump on a 73 240 is removed are there adjustments to be made with anything? I have just removed mine and capped the ports. A friend swears that i will get 20 horse more out of the old girl, but could not tell me if any adjustments are to be made.
Last reply by Bambikiller240, -
Got a 73Z with 72 carbs.The three front sparkplugs (towards the front bumper) are black when they are removed from the engine for viewing. Is the front carb the culprit? I really don`t have the ba**s to adjust the carbs. It seems as the carbs go so goes the engine performance. Comments, suggestions? MikeT 73
Last reply by tfbrown, -
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- 1.7k views
Since my last post, I deciced to go with early SU carbs in my ongoing restoration of my '73 240Z. Yep, we got the '81 280ZX L28 going in next week. Since I'm using a P79 head, I must go with an electric fuel pump. I need to know: Which pump to get; Brand, psi, and gallons per hour. And do I simply regulate the line, or do I double regulate right before each carb (leaving the system un-hindered thus avoiding possible vapor lock)? ------------------ "Go into emptiness, strike voids, bypass his defences; hit him where he does not expect you" -Lao Tzu
Last reply by Phacade,
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