Z-Gad

First of all, hopefully you are fully recovering from your "tumble" off the bike. Now, Beautiful car, exquisite detail, and very clean, even underneath!! ...ouch on your buddie's car I've seen the previous vids (actually have them saved on the 'pooter here) and I noticed a couple of shots of the car at the drags. Just wanted to hear what kinda times and mph you put together with that beast. Look forward to seeing more of the car as it comes along

I have supported all of the L-engines I have done from the back of the block w/o any problems.

As with the others...I had to hack up my support to get my NPR in as well. I guess if you took it to a welding shop, they may be able to make the inlet and outlet such that you would not have to cut up the radiator support. I just cut the whole driver's side of the support out so I could stuff the intercooler plumbing and also a 3" intake tube out the same side. I just didn't want to be drawing hot air from the engine compartment, so I routed my filter out front as well.

My bad... My 73 w/ me in it weighs closer to 2800 I believe. It has R200, T-5, full spare tire, and a bunch of junk including text books, flight bag, tools, etc all adding weight, That puts me at ~ 170 rwhp according to the calculators you supplied. Scottie GNZ and I figured out rwhp using et, mph, mph gained in the 2nd 1/4 mile and 60' (I believe) to figure close to 180 rwhp (this is from memory). Regarding my engine, The block is a standard bore, flat top pistons, and the head was shaved using an angle cut as opposed to a straight shave. The head was shaved at an angle toward the spark plug side giving the head roughly the same cc's as an E31 head. Also, I did not have to shim the towers as the exhaust side remained at nearly the stock height. I used a felpro gasket (1mm compressed) so the compression is actually closer to 10.5:1 if you want to get picky. I run a stock 240z cam and I have no problems running on 93 octane pump, in fact that is what I ran at the track as well. My 60' was also a 2.1, so the time easily could have been improved to a 14.5 if I had drag radials on the car. Agreed, It is much easier to get to where you want to be with a turbo though. 200hp is doo-able w/o an intercooler as well. I figure the stock set-up and ~8-9 lbs of boost and you are there!! No machine work, no special parts, just a little bleeder valve.

My daily driver (10:1 L28 w/ SU's) ran 14.8 @ 92mph which equates to ~ 180rwhp. That should be over 200 @ the flywheel. It is nothing special other than flat-tops shaved N42 and header.

I was fortunate enough to get in on the group buy a couple of years ago here w/ the HybridZ folk. We were able to get 20% off the price. There seems to be quite a bit of interest from a bunch of people again, so another possible group buy may be in order. If someone arranges it, I may be interested in another set-up as well. Just don't tell my wife Check out this thread... http://www.hybridz.org/ubb/ultimatebb.php?ubb=get_topic;f=20;t=000058#000002

The most difficult part I had was locating a 20 year old block which had walls still thick enough to do the 89mm bore. I went through having 3 blocks sonic tested before I found one which was marginal enough to do an 89mm bore. I would do yourself a favor and go no more than 88mm. I only went that high since I had my first block bored for the LZ24 pistons. If I had to do it again...88mm baby!!

i would not recommend using the LZ24 pistons for a turbo motor. They were not designed for the application and do not hold up well...first hand experience. You'd be better off w/ the stock 2.8 turbo bottom end.

A little bit of copper spray before installation sealed the deal for me. I would not have known if James (240 turbo) hadn't told me.

Interesting intake manifold ... looks like a non-EGR w/ webbing? If that is the case, i haven't seen one before. BTW, engine looks very nice

This is a good little article I remembered reading on the SDS page regarding "400 horsepower hondas". http://www.sdsefi.com/tech400.htm

I had a similar problem with the tach in my 73. It would jump all over the place when the weather was warm, but on cool nights, I had no problems. It was steady as a rail. Finally, it annoyed me enough to do something about it. I replaced the tach...no more problem.

Let the dogs eat Len!! I bet your buddy will be trading his triples 4 a little snail power before you know it

No aero mods to the 77 turbo, but koni's, stiffer springs and a nice long highway pass = well, speedo burried at 160 (reads a little fast, but still...) and still felt like it was on rails.

Progress Jeffy!! Progress!!

Excellent Tim!! I'll be following this thread

If you are having a couple done, might as well have a couple more done Think you can hook me up w/ a couple as well? thanks, mike

The only down side to using the 280z/280zx radiator in the 240z and that is the size. the 240Z radiator is a few inches shorter than the 280z rad. There for the radiator support is also shorter and to fit the 280 radiator in, it will hang below the radiator support. Just watch the curbs and pulling into parking spaces. If you have an airdam, then that will hang down lower than the rad and the rad support so you'll hit it first You should be fine w/ the 240z radiator as long as ... ...it is clean, you have a good fan clutch, water pump, thermostat, and run a fan shroud or go with an electric fan.

After farting around with a machine shop which is close to my house (last time I'll do that!!) and got a ridiculous estimate (~ $47 each), I went to another shop for a second opinion. I have dealt with them before and they were reasonably priced. They told me ~$15 each. I said "sold!!". I'll update as more info comes available. I also took them another bare P90A head to use to make sure the threads are right. They said it'll take ~ a week. David, if all goes well, I will probably be selling off the 30 or so hydraulics I have, so I'll keep you in mind.

Thanx Jeff, I'll keep you posted!!!

Impressive little site there

I'm glad "one of us" got it. I was soooo tempted too, but didn't get permission from the boss, so you may understand how that goes... Congrats!!

It'll handle 8-10 lbs of boost, but here in lies the problem... Once you start turning up the boost, you'll get greedy. When you get greedy, you'll want to "just turn it up a little more". Just know your limits. My .02

As long as you are still using dished pistons and the turbo head, you'll be fine. The stock compression is ~7.4:1, so you'll still be way under the 8.5:1. If you are using flat tops, then I would say you are getting close to the fine line.

I am fed up with the hydraulic lifter game. I took a hydraulic lifter, and the mechanical lifter set-up to the local machine shop this afternoon. I said that I wanted a piece like the mechanical boss with the O.D. and thread of the hydraulic lifter and the I.D. and thread of the mechanical. If anyone else is interested, I may have a few sets made to convert the P90A to a mechanical head. Their CNC guy was out, but they're supposed to call me with an estimate and to discuss it further. Now it may just be cheaper to swap over to a P90, but I have so much tied up in machine work on this head that it may be more viable, for me atleast, to have this done.