wish to rebuild 240z!

[CableSrv]

ok my main question is this
i wanna rebuild one with a L28 motor and a E88 head
as i do plan on boosting this monster.
however i'm kinda confused as to the emission laws
since i'm mix matching engine parts how would you class this ?
would it still be exempt from emissions ?
or would it follow the emission standards for the head or the block ?
i thought of twm fuel injected kit to convert the engine over.
also how hard would it to over bored the engine to a 3.1L?
i'm really confused about this stuff as i've never done a full engine rebuild but i wanna learn.
i plan on doing this as a project car.
and i just love this body style

[Shiin]

CableSrv

As far as smogging it should be exempted. Cheack your local DMV, but here in california if it is older then 1973 it is exempted and egine swaping would not require smogging nor will it change classifications as far as I know.

When you said you were going to boost it, do you mean turbo or supercharging. If your turbo charging, you may want to find a L28zxt engine which is already turbo charged.

I don't know if or haven't heard of people boring the L28 to 3.1L so if you do that please let me know how it goes because it sounds possible.

[CableSrv]

well i'd prefer to get just the block and rebuild a new engine
with dished pistons
overbored to a 3.1L
new rods
and a diesel crank i think ?

if it's older that 73 ?
well the L28 engine didn't come out till after 73 ?
which means it won't be exempt right?
or have they made a l28 before 73 ?

[Shiin]

:eek: sorry I ment 73 and younger. But the engine should be excempt from that. So the L28 engine in a 73 240z would still be smog excempted.:eek:

If any one else knows more please fill free to help out.

[ron carter]

this is one mans opinion:

unless you have an unlimited budget, building a proper 3.1 liter z motor is not very practacle. The diesel crank must be really worked over to be light enough to out perform a nicely built up 2.9 liter motor. the diesel crank is very heavy and will rev slowly unless substantially lightened. As far as a head choice i would suggest a P-90a modified to solid lifters, the combustion chamber is a better design ( to eliminate detonation) and this head was used for the factory turbo offering, so if you are thinking turbo its probably a better choice.

[Daniel]

You need to ask a local expert about emissions.They are obviously different everywhere.Example,In North Carolina whichever is newer has to subscribe to those laws.So a 73 car with a 85 motor must have 85 emissions.What ever emissions came with the car must stay on the car.Crazy rules.I also have a 1946 chevy truck.It is factory no nothing.I have added brake lights.Each year I pay 15.00 to hold my left arm out the window and do the manual turn signals(remember those from driver ed?)and honk the horn.My tax dollars at work.

[CableSrv]

wow!
ok well i'm not completly rich but this is going to be a project.
so time is of no essents right now.
but if you think a diesel crank would be not worth the effort then I'd take your word for it.

the p-90a head ?
ok well looks like i'll go look for that head then
how much boost do you think this engine could take ?
before it starts to detonate or blow up ?

[kmack]

There is a website out there somewhere (I know, I've seen it but can't remmebr what is was called) that gave a good write-up on building a 3.1L motor. They also mentioned that do it right would run a few thousand dollars.

As for making a turbo motor, there is a guy in San Antonio's Z-Sport club that right now is building one. I don't believe he's making a 3.1L turbo, but he is getting pretty close to that. I'll see if I can get in contact with him to see what all he is doing to it.

[CableSrv]

Thank you alot :D
i'm really glad I fould this site :D

[kmack]

Here's a link to a guy that a really sweet, beefed up 280ZX turbo motor:

http://members.home.net/drax77/newpage.html

I'm still looking for info on a 3.1L

[kmack]

Check out this thread right here on our own site!

Internet 240z Club > Z-Car Related Stuff > Racing > Meet the new boss, same as the old boss...:)

You may want to try and get in touch with Dan Baldwin. He's running a 3.1L stroker in his 240. He could at least give you an idea as to what is involved with building up such a motor. The only advice I can give is to hunt down a 280ZX turbo block to start with. It's a little heavier than the regular 280 ZX block and canhandle the added displacement better.

[CableSrv]

question!
which year 280zx turbo should i look for ?
and what year p-90a head should i look for?
since i'm very new to this any help you can provide i'd appreciate it.

[kmack]

The first 280ZX turbos came out in'82 (I believe) and ended in '84. Don't quote me on this as I'm not a big fan of the ZX's. But it was the in the last few years of the 280ZX's. As for the P-90 head, you got me on that one.

Try checking out Brian Little's "Datsun Z Garage" website. He has a really good breakdown list of which heads came out in which years and which blocks came in which years. His site used to be on earthlink but it has moved and I don't have access to where it's at right now. I'll try to post it tomorrow....

His site also has some pretty good tips on building up a good strong L28 motor. Good reading at least.

[civ104]

Address for the Datsun Z Garage/ Engine Buildup is http://www.geocities.com/zgarage2001/engine.html[SIZE=3][FONT=arial][COLOR=blue]

[ron carter]

p-90 and the p-90a heads were on the 82-84 280zx's although i have never seen a p-90 i understand that they do exist and are a solid lifter version of the p-90a. As far as building a stroker turbo motor on a budget, well that will be tough unless you have your own machine shop and the knowhow...as far as how much boost it depends on what rod and piston combo you run, and i can't help you there. I suggest contacting Rebello Racing...or D.L. Potter. Good Luck...

[kmack]

If anybody is interested, I have a copy of a program from one of the Z clubs in Australia that calculates engine specifics based on changes in head, pistons, head gasket, etc. from the L24 up to an L31. Pretty cool program that used to have a link to, but I can't get it to work.

If you would like a copy of it, I can email it to you.

{Moderator} I don't know if there is a way to attach files to this site for others to download or not, any help?

My email is: kens240z@hotmail.com

Just ask for the engine calculator

[CableSrv]

YAY!
I might be getting a 240Z soon to rebuild.
found it for 1600 with a 82 L28 block and P90 head :D
with 4 speed manual.
also with a r180 rear end
SU carburetors where rebuilt and still balanced
still runs great!
YAY!
i can already say i'm happy :D

[ben280zx]

I new to this forum, but I was wondering isnt it 280zx manufacture between 81-83?

[Go240Zags]

The 280ZX was manufactured from 1979 until 1983. I believe the turbos were available 1981 to 1983. I have a P90 (not P90A) head, they are frequently listed on eBay. I think the P90A was on the 1983 turbo version. I've heard less good things about this because of the hydraulic lifters, although I've heard they can be converted.

[Go240Zags]

Sorry, I didn't realize this thread was a million years old. Oh well, I believe my info is correct anyway.

[CableSrv]

hah, that's funny! yea very very old in fact i've since decided against the l28 and going v8 now. In process of doing massive rust repair on my 240z.

[red_dog007]

YAY!
I might be getting a 240Z soon to rebuild.
found it for 1600 with a 82 L28 block and P90 head :D
with 4 speed manual.
also with a r180 rear end
SU carburetors where rebuilt and still balanced
still runs great!
YAY!
i can already say i'm happy :D
5-Speed, and a r200 diff, brake upgrade are going to be mandatory.


If you want SERIOUS numbers, do a V8 or RB motor swap. Other wise, L28 stoker is going to be extremely expensive with a turbo, or even triple carb.


Emissions, you are going to be fine. Even with the new motor you will not have to go through emissions. Don't worry about the motor swap because they aren't even going to know about it.



I myself have the L24 and want to stoke it to 2.7L, and triple carb it. The prices don't look pretty, but I am not looking for a monster beast in power, and just want to do this because no one else has really done it.
Even if I only get a 50hp increase, I will be happy. 200hp in a 2300lbs car is a lot of power to be pushing.

[CableSrv]

red dog seems to have fallen into the same issue... it's and old post man ... back in 2001 :P and yea i've already done all that. working on tube front chassis and putting a v8 in now.

[Mr Camouflage]

I thought they started building the 280zx in late 1978? Of course in Marketing speak they would have called them 1979 models, but I though they actually started rolling off the production line in '78. Am I wrong?

[=Enigma=]

There is a website out there somewhere (I know, I've seen it but can't remmebr what is was called) that gave a good write-up on building a 3.1L motor. They also mentioned that do it right would run a few thousand dollars.

Here's a few:
http://www.geocities.com/inlinestroker/
http://www.geocities.com/row4navy/engine.html
http://zhome.com/rnt/3.1HanveyProject.htm
http://zhome.com/rnt/3.1Cobb/3.1engine.htm