Guest andy.tech Posted May 29, 2007 Share Posted May 29, 2007 Hey Guys, I have a 1972 240Z, I don't know anything about these cars but I've been asking around and they told me to join this Forum cause you guys seem to be pretty knowledgeable, I want to build this car up to be a fun daily driver, I wanted to build it with the Weber carb setup, and a nice cam but my question is what is the most I can squeeze out'a these engines while keeping it reliable (though i believe the inline 6 is a great engine)??? Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted May 29, 2007 Share Posted May 29, 2007 i would say "search", but you'll get tons of different answers from tons of different threads, so i will say around 240 in an L28 without turbo or bore/stroking it. if you decide to go up to 3.1L, you can get more.... Quote Link to comment Share on other sites More sharing options...
Guest andy.tech Posted May 29, 2007 Share Posted May 29, 2007 Bless you thank you for not saying "search" cause I dunno maybe this is not my weekend or something but the articles that I've come across haven't been too helpful. Now an L28 is what comes in this 240Z? I'm not savey on the engine codes yet.... Quote Link to comment Share on other sites More sharing options...
Nsyder Posted May 29, 2007 Share Posted May 29, 2007 A L28 is the engine out of the 280z. 2.8L A L26 is the engine out of the 260z. 2.6L A L24 is the engine out of the 240z. 2.4L Quote Link to comment Share on other sites More sharing options...
gjc5500 Posted May 29, 2007 Share Posted May 29, 2007 L24 in the 240, l26 in the 260z, l28e in the 280z, l28et in the 280zxt. l31e is a l28 thats bored with a diesil crank, 240sx pistons, and 240z rods. Quote Link to comment Share on other sites More sharing options...
gjc5500 Posted May 29, 2007 Share Posted May 29, 2007 wow, posted same time Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted May 29, 2007 Share Posted May 29, 2007 Well what I'd do is go to a junkyard and find a 2.8 liter block with flat-top pistons for $80 or whatever. That wil get you the biggest boost in available power. Then get your big cam and put it in there. That should be a fun DD. If you can just get the "C" camshaft out of a 260Z and use that. It is the biggest cam that was ever put into a production S30 series Z. I swapped out mine for a smaller cam and it is a noticeable how much less power I have. Quote Link to comment Share on other sites More sharing options...
Guest andy.tech Posted May 29, 2007 Share Posted May 29, 2007 So does that mean that the 2.4 motor won't get to the 240hp that was mentioned before? Quote Link to comment Share on other sites More sharing options...
gjc5500 Posted May 29, 2007 Share Posted May 29, 2007 the 2.4 put out about 140hp Quote Link to comment Share on other sites More sharing options...
MatMan Posted May 29, 2007 Share Posted May 29, 2007 So does that mean that the 2.4 motor won't get to the 240hp that was mentioned before? It has been done (Sunbelt, Robello), but not as cheap as easier mods mentioned, and not so much reliability (wound too tight) What is that saying??? You can have it 1. Cheap 2. Fast 3. Reliable Pick any two. Quote Link to comment Share on other sites More sharing options...
Guest andy.tech Posted May 29, 2007 Share Posted May 29, 2007 Ok I was thinking of doing the usual raising the Compression ratio, Cams, porting and polishing matching the flow with the cams, How much reliable power should I expect outa this 2.4? Doing it right, now I'd be doing this myself so I'll be posting as may pictures as possible. Really I just want a fun car that is reliable and enjoyable but Maxed in power... I haven't had the pleasure of a straight six with Weber sidedrafts, so I'm itching to hear that awesome growl.... Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted May 29, 2007 Share Posted May 29, 2007 honestly, it will cost you WAY more to get decent HP out of a 2.4L than a 2.8L. to raise compression in a 2.4, you'll be looking at custom pistons. you'd have to have block out anyway, so why go through the $$ and hassle if you can pick up an L28. L28s are simple swaps; just pull your old engine and replace it onto the L28. if you get an F54 block with flat pistons (not all of them have them) and then throw an earlier head (E88 from your 240, or E31, N42) you can easily and cheaply get 10.5:1 compression ratio. if you get the N42 you already have bigger valves, so no headwork needed. invest in a cam kit for around ~600, get a header and exhause and you're shining. Quote Link to comment Share on other sites More sharing options...
Guest andy.tech Posted May 29, 2007 Share Posted May 29, 2007 I kinda wanted to keep it a 2.4 but i definitly know what you mean with swapping in the 2.8, are they hard to come by?? Quote Link to comment Share on other sites More sharing options...
MatMan Posted May 29, 2007 Share Posted May 29, 2007 about as hard as finding a 81-83 ZX in a PnP. Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted May 29, 2007 Share Posted May 29, 2007 ya, not hard at all Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted May 29, 2007 Share Posted May 29, 2007 It wouldn't be that hard to raise compression in an L24... First off what cylinder head do you have on your L24? The type is cast into the lower edge right next to the block right below where the mechanical fuel pump is and a bit behind. If you have an E88 then you want to change heads to raise compression. Second is to see if you have notches cut out in the tops of the cylinder bores for the larger valves. I thought that all 240s had uncut bores but I pulled an L24 apart the other day and it had cutouts for the larger valves. If that is the case then you can get the L6 early maxima gas head. It will bolt straight on and is about 6ccs smaller than your stock E88. If you have an E31 head or have uncut bores then you that swap won't do much for you. I think you could use the NISMO .6mm head gasket to increase compression but you also have to buy their special pully. Just some ideas... OR... you could turbo your L24... That has been done before. Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted May 29, 2007 Share Posted May 29, 2007 ^that's true, OTM; but couldn't these mods be done to an L28 with more drastic results? my reasoning is that it's cheaper to build an L28 than mod an L24 to get good grunt. not to mention the torque from that extra .4L! Quote Link to comment Share on other sites More sharing options...
Guest andy.tech Posted May 29, 2007 Share Posted May 29, 2007 I see why they told me to come to this forum, I like the suggestions, its good to have more than one choice, I welcome any and all suggestions.... Thanks!!! Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted May 29, 2007 Share Posted May 29, 2007 Or just get a L28et from a 280zx and convert to FI. Its easy enough, just look at the sticky's on how to do it step by step! Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted May 29, 2007 Share Posted May 29, 2007 ^that's true, OTM; but couldn't these mods be done to an L28 with more drastic results? my reasoning is that it's cheaper to build an L28 than mod an L24 to get good grunt. not to mention the torque from that extra .4L! Yes but if you want to see a little more grunt in over a weekend for a head swap then it may be worth it... I would not want to do a whole motor rebuild just to have a little more fun... An L24 is still a lot of fun guys...so is my L26...Just for until my turbo motor gets built... Quote Link to comment Share on other sites More sharing options...
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