sell the 240 to do it. what are you going to do with two cars? it's sad that your last couple z's you seem to have hardly driven. you just sell them as soon as they are finished. you should make your next one your only car and actually drive it.

 

lol I don't own a 240Z

 

no thats why i sold them they would be MY ONLY CAR and im not daily driving a car im going to put all that work and money into. no way no how it needs a garage spot and im sure it will break a decent amount.


also bleach doesnt own a 240z thats a fairlady Z it came with an L20 the JDM 2.0 inline 6. to bad it wasnt the watcha call it with the DOHC motor haha

 

i can't understand not daily driving a car just cause i worked on it. i worked my *** of on my midget and i loved to drive it all the time. sure, i had to keep working on it to keep it nice, but it was worth it. i love being able to drive my hobby. and i still kept it in the garage. it just doesn't make sense to me. if something happens to it cause you drove it too much, well, you get to work on it more! fun stuff. and it costs money and time to fix any other DD too.

 

im going to murder you with my bare hands! ok back on topic.... that was pretty good for starting in fourth in those low of RPM's and it still pulled to 100 like no problem

 

hey lifegrddude, you don't by chance happen to still have those SVO injectors do you? I figure if I can get a set off a z person that'd be cool. I'm gonna go junkyarding and get me some more connectors for my CHTS, last injector, and air regulator, so I'm gonna see if I can get some SVO injectors.

 

Yeah it pulls ok for being a stock motor with just bolt ons. I took a vid today on high boost, but I ran into some severe misfiring which I think is from having the plug gap too wide. I'll have to regap my plugs this weekend and see if it gets rid of it.

I posted the vid on youtube, but as usual they make the audio crappy so you can't really hear the missing. I pretty much lost all power by 5K. Funny thing is, that at 0.8 BAR of boost, it pulls fine. It's as soon as I set it to 1.1 then it goes all spastic...

http://www.youtube.com/watch?v=87OoGYKWBz0

Duowing, I did get the JWT ecu and injectors installed. Thanks for the link. Now I gotta get the stock o2 hooked up so I don't idle so friggin rich and also during around town driving. Under boost the AFR is fine.

Edit: Dude if you would have asked me about 2 months ago, I woulda been happy to sell you the SVO injectors. I pretty much sold them at a huge loss to another Datsun guy.

 

I think I found my reason for the misfire. I was checking everything out, and lookie here, my manifold gasket blew at the #6 cylinder. Yep, don't use cheapo Felpro manifold gaskets. This will be the 3rd time I've blown their gaskets out. I didn't feel like waiting an extra week for a Beck-Arnley or even an oem Nissan gasket... Stupid me.

So I'll be changing out the manifold gasket this weekend, and then going to see if everything is cool on high boost. My wastegate doesn't even work right now due to that leak. Darn near hit 1.5 Bar of boost just merging on the freeway today.

 

do you pull the exhaust manifold when you do the intake/exhaust gasket? Or do you just separate the gasket and do the intake half? Oh I don't know if you'd know or not, but as far as I can tell my exhaust manifold still leaks at the mating surfaces. I've heard alot of people say this isn't uncommon. Just that the manifold being so long, that it has a tendency to warp a little and you need to get it resurfaced. So when I eventually toss on my N42 intake I'll see about getting the manifold resurfaced. You know if it leaking a little can cause problems?

 

i cut the webbing out of mine and it still didnt have any problems sealing

 

You cut the webbing out of the intake manifold? What did you use? Aluminum grinding is a pain in the azz!

 

i cut the webbing on my intake mani as well, wasnt pretty looking but wasnt really hard either

 

I do pull the exhaust manifold when I do the gasket. The part of the gasket that blew this time is the exhaust section for the #6 cylinder. I believe it's the paper construction of the Felpro gasket is why it blows out. Maybe moisture makes it weak or susceptible to blowing out, but I don't know for sure. I've never had an issue when I used either a Nissan gasket or a metal Beck-Arnley gasket. I usually add in a thin layer of the high temp gasket sealer to be safe, and ran that setup for nearly 2 1/2 years with no issues.

 

get the metal beck arnely it work good, and i doubt on leaky exhaust runner is causing a miss fire you it would really only effect the turbo spool and even with just one runner with a small blown section wouldnt really create noticable effects. if anything you might be leaning out but i forget you have a wideband right? so im sure you know if you were running lean or not... plugs and cap and rotor still all good?

 

where do you guys get your metal beck/arnley gaskets? I'd like to get one of those for when I put my N42 intake on.

 

It's actually running super rich from the misfire. I can shoot rocket sized flames out the muffler if I let off under boost. The wastegate is plumbed off that runner so it doesn't regulate boost anymore either. Pretty much I was fine until the gasket blew. Now it runs rich, the leak is loud and annoying as hell, and I'm ready to torch this paper POS gasket as soon as I pull it off.

I checked the plugs, cap and rotor, and they seem fine. (Had to clean the plugs from running rich, but otherwise they were ok) The plugs are fresh with only 150 miles on them, the cap and rotor have <1000, and the wires maybe have 200 miles on them. I'll double check everything under the hood though this weekend to see if maybe something else is the issue. The only other thing I can come up with would be the TPS.

You can get the metal gaskets from Kragen/Schuks/Checkers or whatever name they go by in your region. It's around 21 bucks for the gasket. The POS paper Felpro was ~17. The Nissan gasket is ~30ish I think.

 

hmmm... yeah the waste gate might be near that runner but that still shouldnt be the whole problem. i just dont see one runner leaking causing a misfire. replace it it takes a couple hours. and felpro used to have good gaskets but i get the paper lined metals ones to now no more all metal/composite w/e it was. but yeah fix it i bet it still misfires. i mean it would have to be a REALLY big leak and then also your boost wouldnt reach full then either. as long as its reaching full boost for what you have it set to then its not the direct problem. maybe your ecu needs a lil tweakin.... something to lean out the injectors some. your not over boosting at the top end are you?

and yeah i forgot no wide band o2 sensor then?

 

The leak is pretty bad, you can hear it fairly audibly whenever you get near boost. My wideband says under boost with the leak I'm at 10.1 or less. Before the leak, I was at 11.1-11.4 all the way to redline.

I can get full boost, it's just it is laggy and also not regulated. I can probably push more than 1.5 bar of boost if I keep my foot floored, but I don't want to send a rod through the block from overboosting. My boost is supposed to be set at a max of 1.1. You can hear the wastegate opening, but it's not flowing enough exhaust out to keep the boost in check. It could be my TPS went bad which could also contribute to misfiring, but I won't know till I get some time to check it this weekend.

 

always go for quality when building the fast cars, kinda have to to eliminate doing things twice, unfortunatly murphys law has stuck you here. lww you can get proper aluminum cutting wheels, they cut it like butter, then use a aluminum burr to get the rest, really not that hard, just messy and time consuming. cant use steel equiptment for it, it just doesnt work.

 

Yeah, well I was going through major Z withdrawals so I thought I could use the crap gasket, and so here I am this coming weekend taking my Z apart again hahaha. Oh well, I guess it's a good time to do some other work while I'm at it. I have a couple more things I'd like to add to this Z before I think I'll be satisfied for a while.

 

uh oh, its gonna be down another month? sounds like what happens when i do something. oh, ill just upgrade while im here

 

Haha no I hope the Z won't be down for another month! I can't stand the thought of daily driving the 510 again... I swapped the gasket out yesterday, and today I'm going to tackle the issue of the short shifter's road noise. That, and finish wiring up my alarm and radio. But then again it is Sunday, which means football, so we'll see how productive I'll be.

 

I have to wonder if just going to about 10 or so PSI of boost if the stock fuel system is starting to get maxxed out?

After reading your post a few back about your AFRs going super rich I got in the mood and I hooked up my wideband today and went to measure my AFR., I was running like 11 something as my boost was close to stock boost, then as I started to go past and get to higher RPMs it started to lean out towards 12.5 or so. Not bad as far as a A/F ratio for performance, but seeing as the stock maps for the Z31 show to be running close to 10-something under full load. I think I best upgrade my injectors/pump before I even think about running more boost.

 

dont be such a ***** lol, from what i read L motors seem to take kindly (power and still safe) around 14 or 14.5 i forget, target AFR is around 13 i believe according to most "standards". really only time you start running a richer tune is when your getting into some high boost near 20psi and such just to be safe i guess...

 

Or you know the stock injectors pump just can't keep up with the boost, you go super lean and start detonating. I'm just saying it shows that when the stock maps are designed to run super rich under full boost and with just a few more PSI I can see it's already starting to lean out indicates, you're already starting to hit a wall with fuel delivery. Sure you can run more and still be fine. I forget, but I thought it was around 12-13 psi, where you start to pass the efficiency of the T3?