Engine Mods
Zcar engine modification
32 topics in this forum
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- 5 replies
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Your probably all gonna kill me over this:p But I pulled the SU's off my 240z, and put on this Skyline P90 intake on it (I ported the hell outta the intake to match the carb). The carb is a 2 barrel carter I pulled off a dodge 273 and rebuilt. It seems to be running considerably better than my SU's, but with maybe a very slight bit less power. However the SU's could've used a good rebuild, and I'm still tinkering with this setup. Ive still got the choke to hook up and it needs filters and a better fix for a couple of the vacuum lines then Im gonna give it a cold air intake.
Last reply by Stanley, -
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I have an older 240z engine built up mildly (Cam and valves) but after pulling the head off i can see a few cylinder walls are trash. It has an 83mm bore which from my understanding is stock 2.4l and the options I am seeing is bore it to clean it up and then gain some hp but I would have to but oversized pistons, or if it is possible put the heads on my l28 280z engine and do a rebuilt on it and bore it out a little and do some modifications. I only recently got into the Datsun world so I dont know a whole lot but if you guys have any better ideas I would love to hear them. I am 17 and my 280z is my senior year project.
Last reply by 71Nissan240Z, -
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Has anyone here actually installed one of these TWM big throat throttle bodies? What sort of performance gains did you observe? My general rule of thumb is you can't actually FEEL anything less than about a 10 horsepower gain... I have serious doubts, however, about a [claimed] 9% increase in rear wheel horsepower. That would require a 20-30 horsepower gain at the flywheel, and I simply don't a bolt on part bumping the Z's gross horsepower by 30%, unless you COMBINED it with headers, low-flow exhaust, and other bolt-ons. Here's the PR from the recent ad, which I ASSUME was cut & pasted from the Motorsport website... "This is a Motorsport Throttle Body for a fuel …
Last reply by conedodger, -
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Not very pretty but here is the header Z-Ya and I got with the rest of Bob Sharp Racing parts a few years back. The header studs on #1 & #6 are too big so they are hanging there just for the picture. Two 3 pipe collectors with tabs and springs funnel the flow back to the dual trumpets in the rear. It looks more like a prototype than one that was actually used. The welding in some places seems to have been done with old wire coat hangers on very thin metal using a bunch of truck batteries. I have to ask JR Mitchell if this was made at the track in an attempt to get the car back up and running. The #5 will hit the steerin…
Last reply by gnosez, -
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Has anyone ever used a Buick v8 for a swap? My uncle Tim Henderson passed away the week before Thanksgiving this year, and I was thinking since he was a Buick nut and was responsible for me having z-cars, I would like to build a z with his Buick 340 v-8 That was for his 66 skylark. He always tried to talk me into a v-8 swap, and I think it would be cool to build this z as a tribute to him. Would this be about the same as a chevy swap?
Last reply by s14280zx, -
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Hey everyone, I know you guys are all about keeping things lightly modified or stock. 2 pretty straight questions for what could become a large modification (just to get me started). I was told the engine in my 71 240z is a 260z engine/transmission. Are there any numbers on the block that would tell me what the truth is? Same for the transmission? If it is a 260z, can I bore it to make a 280Z engine out of it (since a 280 is a bored 260, this makes sense, unless i'm missing something)? The end result I want is a carbureted 280Z that runs well and fast with a 5 speed transmission, for as cheap as i can do it (i'm pretty good with a wrench, dad welds, need to hire boring/m…
Last reply by rupertjab89, -
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Have a fairly low mileage Y70 head/cam assembly on my 240z. It's all stock pretty sure. Stock cam. Don't know much about it but have some info from searches. Came stock on C211's Skylines, Cedric's and who knows what else. Changed the performance quite a bit - torque is strong from 3000 to 4600 rpm. Had it dyno'd, the torque is a straight line rather than a curve but it quits pulling at 5000 rpm. Read somewhere that's what the stock cam does. No plans to ever race it except once a year at the dragstrip. Got a pretty good ET last time, it's quicker than with the previous stock head, but top speed would be lower I expect. Plans for the bottom end are bore the 240 a li…
Last reply by Stanley, -
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Can I use just the outer OE valve spring to get the wipe pattern right? Honsowetz's book uses special "set up springs" that I don't have but I would like the least resistance I can get while doing this. All my lash pads are .190s and I figure I'll do a lot of filing to get them right. Any experience on which to use while doing this would be appreciated. Thanks, Cliff
Last reply by Mark Maras, -
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I am posting this information for reference only. I already sold the Weber carbs with manifold and will be going either Z therapy SUs or Arizona Z 4 Barrel setup. The reason for selling? Just didn't have the skill or motivation to get educated on tuning the Webers. Still up in the air on getting the Top end racing TWM throttle body system. Kinda pricey at 3k minus the ECM. Once I get one of those installed I will get back on the dyno. I think the carbs, canon manifold and the mild porting limited the HP. Did a few chassis dyno runs last month and here is the best pull. 182HP and 189 TQ at max pull at 5800. I also have an O2 wideband installed. The AFR was 13.4…
Last reply by gnosez, -
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:stupid: My Dad has a very nice rebuilt Chevy 400 in his 59 Chevy Apache and he's going to put something else in there, so he said I could have the Chevy 400 engine for free if I wanted it. I currently have a 78 280z and I want to drop a big V8 in there, but I don't really know how much work or money it's going to be. Can someone give me an idea? The real question is, since I likely need a head job on my in-line 6 stock motor that will cost around 700$ (guessing, that's what another guy on the forum paid), should I fix the stock engine or just put the Chevy 400 in there? And after that, my dad says that since the bore is bigger on the 400, there's no room for a water jac…
Last reply by gvincent, -
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Found the 1999 Clifford catalog, all they had for Datsun's at that time were headers, exhaust systems, and cams. Now they have zip specifically for Datsun.
Last reply by Walter Moore, -
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https://www.thezstore.com/page/TZS/PROD/classic17a07b/11-2995 For Use With Our Headers: If you are going to run this Clifford manifold with one of our headers, there will be a small area of interfere between them. Slight modification (grinding) is required to the mounting flange to allow proper clearance. The small amount removed will have no adverse effects on the install, the manifold, or the header. For Use With Other Headers: The manifold will NOT work at all with Nissan Competition Headers, or Hooker headers. Can anyone explain to me please why a performance exhaust header won't work with these ?
Last reply by Sean Dezart,
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