[WillieBoy240Z]

Please give me some advice on what to do with my L24 block to increase performance -- AFFORDABLY. Right now, it is stock and has about 113k miles. No signs of smoking or bad wear.

L28 stroker kits in the catalogs are way too expensive just for the parts.

The guy helping me with this (he'll be doing most of the work) doesn't have much experience with L6's -- he's a Ford guy.

I could probably spend, say, $500 for parts including new pistons, crank (?), etc.

Can you give me some help on this? I'd hate to have just new rings put in when I have the chance to make a real performance difference without too much extra $$$.

 

[Andrei]

if i were you i would do the work on an l28 block, since it is already a bigger motor. if you bore out an l24, all youre doing is make it an 2.6 to the most. as for experience, it doesnt matter all that much. a good machinnist will be able to do a good job on any cylinder bore. its all round on the inside, right. so just make sure this guy is good at what he does

 

[WillieBoy240Z]

Thanks Andrei. A different block is not an option; I am stuck with the L24.

Maybe someday I will get an old L28 and "go to town on it. Today, I must stick with my current engine and just do some mild modifications.

 

[zbartsky]

If that motor is okay, why not just fine tune the SU's with jet needles, filters, etc.-go to an electronic ignition system, later factory or aftermarket-add some headers and a better exhaust. If you can find a 3.90:1 rear end do that too. I guarantee you will get a big boost in power and acceleration.
Don't do any other mods to that engine. If you decide you want to go crazy, you really have to go with the bigger block, cam, headwork on and on, otherwise you are wasting your time with the 2.4 unless you have rules to go by.. But you do not need to go into that engine unless there is a problem.

 

[WillieBoy240Z]

Thanks Zbartsky

That makes a lot of sense. I am presently doing all you mentioned except for the rear end. Will that fit an otherwise stock 72 240z drivetrain? (I don't want to fiddle with any more back there than I have to.

 

[zbartsky]

Re: Thanks Zbartsky

Oh yes. I have a 72. I put the R200 3.90 in it. You must use the R200 halfshafts and moustache bar. Everything bolts right in. There is a lot of info in the archives.

 

[WillieBoy240Z]

Re: Thanks Zbartsky

This sound good, but I will have to put it off for a while. If there was an easy way to salvage yards to be able to properly identify R200, I would try to find one in the yards.

 

[zbartsky]

Re: Thanks Zbartsky

It is easy to tell the difference between R200 and R180, the latter being much smaller. The tricky part is playing with it to find the ratio if you don't want to open it up.

 

[WillieBoy240Z]

Re: Thanks Zbartsky

Yeah, I notice now that I just did a little research on the subject. Assuming someone can't make a purely visual identification, is there a way for a junkyard worker just to get under the car and ID it properly? You know, like a part number, plaque, etc?

 

[Stingray280zx]

It is easy to tell

When i was reading a vic brit magazine i told me right there in the most simple way. Well the R200 is bigger, but the R180 has a 5 bolt flange on the side of the differential where the half shafts go (that is there name right?) so on both sides of the differential there is a 5 bolt flange, but as for the R200, it is bigger, and does not ahve the 5 bolt flange on it, simple. Hope this helps

-Emir

 

[twentyfourouncer]

Re: It is easy to tell

Go to the Z garage, it will tell you which cars had the 3.90 rearend and exactly what parts you need to swap it in. The link is http://www.geocities.com/zgarage2001/z.html and look under performance tips.

 

[BIGJIM]

Re: It is easy to tell

THIS WILL BE A NICE ENGINE COMBO...USE A L28 BLOCK...240 CRANK AND RODS AND NISSAN TRUCK PISTONS..FROM THE Z24 ENGINE...HAVE THE BLOCK BORED TO ACCEPT THESE PISTONS AND YOU GET A 2.9 STROKER...ITS NOT A BIG STROKER LIKE A 3.1 BUT THE BIG PISTONS WILL GIVE YOU ALOT MORE DISPLACMENT..MAKES FOR A NICE CHEAP ENGINE BUILD...JUST A THOUGHT...JIM

 

[shane280z]

Amen to that brother !! N/C

N/C = No Comment.