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lowrider

Lowrider's 260z

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is your intercooler hot piping running under the engine??

indeed it is! I copied the idea from a member here named ktm. It allowed me to keep the mechanical fan, along with cooling the hot pipe a little bit because of air exposure from under the car.

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I finally decided to tackle what little rust was in the car. I only had a few place in the floor pans that needed replacing. I did'nt think it warrented replacing the entire floor pans, so i made patches to put in. I think that the patch venture went well. I cut out the cancer with an air saw, and formed some patches out of some spare metal around the shop. I sprayed rust converter on all the surface rust, tack welded around all the patches, then went underneath seam sealed, undercoated the new patches, then painted the inside with some black enamel to seal them up.

Pictures!

 

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Edited by lowrider

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I swear if I have to remove the diff in this car one more time, I'm going to go crazy!!!

It all started when I smelled something burning when I would slow down after some boost runs. Checked oil, all was well. Put the car on the lift and it was obvious that the rearend was some how leaking gear oil on the exhaust. I got out the handy dandy flash light to find that my rear cover gasket was pushed out on the drivers side of the diff allowing it to drip down and leak. UGH!!!

This makes the 3rd time that i have taken the diff out and put it back in!

After i got it out, the root of the problem was the vent somehow got clogged and built up presure inside the diff forcing the gasket out so the air could escape.

Pulled the vent out, and put the vent from the R180 in the cover, reinstalled, and called it a night.

 

The whole up side to the ordeal was that the diff was a piece of cake to remove with the RT mount!

 

My 3" exhaust sitting outside the shop

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Ron Tyler mount goodness!

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Out and ready for the rear cover

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Rear cover with new vent

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I havent updated the thread in a long time! I've mainly been just driving the car, Bosst got bumped up from 7 to 12 pounds. just little stuff just piddling around.

 

The plan is to install some CRX seats soon, but working 50 hours a week has kinda put a slow on that project.

Edited by lowrider

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so your running all of this turbo shenanigans on the ZX N/A ECU? Thats good news for me lol

Lol, yupp! It works like a champ as well, 12 psi no prob!

Im using 265 sohc ka injectors, I tweeked the afm wheel so It doesnt run rich when im cruzing around. Then use an FMU for extra fuel on boost!

 

Pretty straight forward. lol

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12 psi killed it! I broke two ringlands on the number one piston. I discovered the problem after an on boost run. I noticed a ton of smoke coming from the valve cover breather. Did a compression test and found that cylinder 1 was 70 psi while the others were 105-110. The plan is to get another piston and rings, and stab another piston in. I do plan on building a forged internal turbo motor, just not right now!

 

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Taken apart!

 

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intercooler is missing!

 

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This was after draining my intercooler...

 

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carnage

 

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carnage yet again

 

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#1

 

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#2

 

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#3

 

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#4

 

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#5

 

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#6

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does 105 110 psi not seem like very low compression to start with? my 8.5:1 1jz was 170-180 psi (dry test). For all the effort of pulling the engine apart, maybe gap and install new rings all round? Im no expert on L series at all, what are normal compression numbers?

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does 105 110 psi not seem like very low compression to start with? my 8.5:1 1jz was 170-180 psi (dry test). For all the effort of pulling the engine apart, maybe gap and install new rings all round? Im no expert on L series at all, what are normal compression numbers?

 

I wanna say around 160-170.

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Im not too concerned. I know this motor is nowhere near new and I dont expect it to have 170psi of compression. The thing that really matters is if the numbers are as close across the board as possible. But yes, there is a good chance im prob going to rering the entire motor while im at it.

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The car has undergone a few changes the past 2 weeks. Since the piston incident I have been researching Megasquirt. Last 2 weeks ago I finally bit the bullet and bought MSII extra, a relay board, a wiring harness, and all the other assorted bits. I got the goods last Friday, started wiring Friday night, collected the various missing sensors and materials to finish up Saturday, and had it finished and running Sunday! I’ve gotten the current map pretty close to where I want it! I LOVE MEGASQUIRT!

 

So, today the pops and I went to the junk yard in search of some doors for my uncle’s 50 caddy. This yard was like heaven! 80 acres of nothing but old cars! Who would have though among the sea of old Chevys, Fords, and Dodges there would be any Datsuns? Surprisingly there were 2 280zxs’, a 280zx 2+2, a 280z 2+2, and an interesting roadster. I had my fingers crossed that among the 3 280zxs’ one would be a turbo but no such luck. However I did find a Webber big throat throttle body that belonged to one 280zx. Needless to say, I grabbed that for a meager price! On my way to the z cars that were in a pine thicket I stumbled across a roadster that had an interesting motor in the engine bay. The Datsun had a SOHC ka!

Anyways, on to the pictures of today’s venture. Pictures of the megasquirt later!

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Not much to update project wise. I still need to get some pictures of the megasquirt. Im holding of on installing the webber throttle body untill i can jew the pops of a non-webbed non-egr n42 manifold from one of the 280zs' we have around the shop. The plan is to smooth everything out and port the runners along with opening the throttle body opening for the webber.

 

Well, I went to "The Dragon" Friday evening after class with a few of my buddies. My one friend brought his camera along, so we set up the tripod in the hatch of the z and shot some HD footage on the glorious road. I had a nice ride up to the cross roads of time. Then on the way back, just passed the Tennessee border I started hearing what sounded like rod knock... We pulled over imediately. Finally pin pointed the sound, turned out to be the water pump belt, It had eaten 4 of the teeth off. decided to limp it through and try to make it to the bottom of the mountain. All was going well untill after the overlook. Keep in mind this is at around 8:30 at night, The belt finaly gave. I pulled over, and removed what was left of the mangled v-belt. I had my friend luke lead, while i coasted the rest of the way down the mountain. We all loaded up in his Mustang and made a parts run to Maryville to get a new belt so i could get home. Luckily the Autozone stayed open till 10! When back and within 5 mins we were good to go! During this whole process my friend with the camera, Kody, documented. lol

 

At the overlook:

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Elbow deep:

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At the bottom of the mountain:

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Guest ttoude

hey man great car, saw your piston man and I just wanted to touch bases with you that those are N/A pistons. I don't know what you running now but if it's still a boosted na, save yourself some trouble and grab the next avail f54 block. :)

 

Tubo piston

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hey man great car, saw your piston man and I just wanted to touch bases with you that those are N/A pistons. I don't know what you running now but if it's still a boosted na, save yourself some trouble and grab the next avail f54 block. :)

 

Tubo piston

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Thanks! Yupp, they are indeed N/A pistons. It is an F54 block, but it is the N/A version with the flat top pistons. Im pretty sure the cause of the failure was the lack of precise fuel control anlong with boost out of the turbo's effiency range. Im still running the flat tops but now I have megasquirt to control my fuel and am running stock boost.

 

The current plan is to collect parts on the side and build a dedicated turbo motor. However, I now have to deal with the issue of the exhaust liners on my p79 coming apart and destroying my turbo!

Edited by lowrider

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i dont think the turbo pistons are any stronger anyways. the f54 blocks just supposedly have stronger blocks. because it has extra "webbing" of some sort. i like your build though man. definitely keep it up. my z has been sitting for the last couple years and i plan on starting a build.

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i dont think the turbo pistons are any stronger anyways. the f54 blocks just supposedly have stronger blocks. because it has extra "webbing" of some sort. i like your build though man. definitely keep it up. my z has been sitting for the last couple years and i plan on starting a build.

You would be correct, there was a recent thread that gave the dimensions of the ringland for the turbo and N/A flat-top pistons. The pistons are nearly identical for the exception of the pin height and the dish.

 

Well thanks! This thing is definitely my labor of love.

 

Ok, since I haven't updated in a while I'll get everyone up to speed. I installed a set of crx seats into the car. Fabricate a few brackets, use the datsun sliders, and we are good to go. I love these seats! The bolsters fit me so well and are so supportive! Pictures:

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Anyhow, this Sunday was quite interesting... I was running some errands in the car, just enjoying myself, when as a pull onto a side street I hear a "ting ting ting". I didn’t think much of it just sounded like a rock hitting my IC piping. I knew something was wrong when I no longer built boost... I pulled over immediately checked everything no blown joints everything is in its place. I limped the car home, when I get there I take the filter off of my turbo to find that my compressor wheel is not spinning. I thought the turbo was toast; I proceeded to pull the sucker off to find out what went wrong. When I got the turbo off I spun the compressor wheel, somehow it was free again... while I was taking the downpipe off so I could checkout the turbine a piece of metal falls out of the turbine inlet. "The turbo is screwed" to the contrary I’m one lucky SOB. The piece of metal that came out was just small enough to reach the blades, yet when it made contact it wedged the fins instead of grinding the ever-living hell out of them. The turbine was fine, now to find out where the metal came from. THE EXHAUST LINERS! On this discovery I pulled the intake and exhaust manifolds to see which cylinder it was and if removing the liner was necessary. I found that the number two exhaust liner was so loose it was rattling. Pulled that sucker to find a gap where the missing piece fit. Upon more inspection none of the other liners were loose of fatigued so I left them in for the time being. I smoothed out the port and reassembled. I know this is far from optimal but the car is currently my only transportation so I needed it running ASAP. So on to pictures!

 

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Edited by lowrider

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I've been on a parts buying spree!! Two turbo and a fuel rail later seems the only thing im missing are larger injectors.

 

Bought a T04B with the intent of putting it's compressor housing on my t3's exhaust side. Turns out after looking at the map that it was into the surgeline. Roughly a week later I was calling the local wrecking yards for a holset... Found an WH1C for next to nothing! Its map is the equlivelant of the early HX35 so it should play nicely with everything else.

 

I bought a pallnet fuel rail off of Rossman, and installed it yesterday along with cleaning all of the stuff off of my intake manifold. It makes for a nice clean setup.

 

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T04B:

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Holset:

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Megasquirt:

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get some supra 440's or even some other injectors that are a little bigger and now you're in for some real fun.

Thats the plan! I have a lead on some 480cc injectors for cheap that im pursuing!

I intend on grabing an N42 non-webed, non-egr intake off of one of my dad's cars. Shave all of the bosses, powdercoat, gasket match, and port it for my weber throttle body. Then slap it on when I do the turbo!

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Long time no update! I’ve been busy with school and such up until winter break. I had picked up a Holset on my last update. I finally started digging into installing a few go fast goodies!

I started by removing a non egr, non webbed n42 manifold off of one of the datsuns my dad owns. Part of the deal was that I replace the removed intake manifold, not a bad price if I do say so myself!

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Next up was to smooth that sucker out! The plan was to go completely smooth and to powder coat the finished product. I gained a respect for the people that completely shave these manifolds. I put a ton of work into this thing! I welded up all of the holes after shaving the raised bosses, ported it for my Webber throttle body and sandblasted it.

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^^^^^ The glorious powder coated under shot to show all of the vacuum ports.

 

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42# hr low impedance injectors

 

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Holset in comparison to the stock t3

 

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Intake off and turbo removed

 

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Test fitting the holset… spacer needed.

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Yours truly holding the massive beast.

 

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Wrapping the exhaust manifold.

 

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^^ yours truly on the right and my good friend on the left.

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I couldn’t help putting the unfinished intake on with the exhaust and the turbo.

 

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Welding up a crack in my thermostat housing before powder coat

 

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Getting the turbine housing loose, That thing did not want to move so I brought out the muscle.

 

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Turbo bolted up for good. It required a ½ in spacer.

 

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The Intake in all of its beauty. Also notice the polished Webber throttle body!

 

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Doing work!

 

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MMMMmmmm

 

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Configuring megasquirt to play with the new injectors

 

Well, I got It running. I haven’t set up the timing control yet. I took it down the road and was dumb founded with how fast boost came on! But unfortunately I had a problem with controlling boost… It wanted to over-boost ridiculously, I’m talking wanting to pass up 20 psi and keep going. I however caught it before it got there I didn’t let it passed 15psi. I guess retarding the timing the first time out was a good idea. ïŠ

 

So I needed some control over the boost… so off came the turbo for a little port work.

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I opened up the wastegate a lot, but didn’t get pictures of the final product.

 

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For extra insurance I took the divider out all the way to the wastegate hole so It would bypass from both sides. I’m sure glad I did after I got everything back together.

 

Even after All of the porting, it creeps just a little bit. I’m using a 7psi waste gate and it holds until 4000 then it starts creeping slowly going to 15 psi but I haven’t pushed it until I can control the timing with mega squirt.

 

I should have some more info in the next few days, first impressions and alot of tuning! I cant wait! Ill also post pictures of everything together and working here soon as well.

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