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Unread 02-07-2015, 01:26 PM   #1
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Default Skrimps 300ZX TT Build

As promised here is the build thread for the 300ZX TT. We bought it and about 4-5 weeks after tore up the clutch. At that point we decided it was a good time to start the build we bought it for. Had our shop mechanic tear it down (not my decision, I would've preferred to do it myself). Now I have a crap load of parts to sort through because everything was just thrown into a pile and not labeled.

Tranny got sent off and rebuilt. Engine got broken down (again.. not by me ). Everything looks good on the inside, cross-hatch machining lines are still visible and the whole assembly turns easily. Only some carbon buildup as expected after 130k miles. Heads and cams look good, the camshaft caps... Again... our shop mechanic for some ungodly reason decided to take one of the cams out... Just one, along with the cam caps and leave them out... Unoiled... One of the camshafts has a very light rust coat (needs to be buffed out) and the cam caps all have bolts rusted tight in them that I have to remove before I can send the block and heads off (pb bolt blaster being administered currently).

So.. With all that said here is the build plan as of current.

1. Repaint. We are currently leaning towards the stock white pearl color.

2. Tranny. Rebuilt and done

3. Block and Internals. Getting ready to go to a shop to be broken down, magnafluxed to check for defects, steam cleaned, and shot peened. Once I get it back, port and polish.

4. Heads. Also going to a shop to have wear parts replaced, valves rehoned, magnafluxed, and steam cleaned. Once I get them back it's port and polish time. New timing kit going on as well.

5. Clutch and Flywheel. Got new ones ready and waiting. Specialty Z aluminum flywheel and iirc a SZ Sport series clutch.

6. Put all that stuff back together.















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Unread 02-07-2015, 11:20 PM   #2
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Crap that will be fun to put back together.
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Unread 02-08-2015, 04:19 PM   #3
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Took the turbos home this morning and started working on them. Got them broken down (after a little heat and a lot of dead blow pounding).



Both of them had some gunk but the one that was seized was full of gunk behind the shaft seals.



Gonna be ordering a rebuild kit soon.
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Unread 07-07-2015, 01:03 PM   #4
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I think my dad is finally ready to start dumping some money into the 300ZX so I am getting ready for the build.

The plan is to remove the bottom end and send a bare block and head (without valve cover and timing stuff) to womack head and block and have everything boiled clean, have the block decked and bored 0.020" over and honed, valve job and wear parts replacement on the head and polish the cams plus a deck on the head, as well as polish and check the balance of the crank.

Rebuild it with Wiseco forged pistons (0.020"+ of course), eagle forged connecting rods, and a cometic head gasket and paint it all once the head and valve cover are on. Rebuild the turbos with stock CHRA's and get the Z1 Motorsports power pack 1 which is ECU, 15psi boost jets, intake, plugs, and full exhaust.

As mentioned in the OP, I have clutch, flywheel, and timing kit lined up. May throw a 1-piece DS on there because it's only $400 as well.

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Unread 07-08-2015, 03:57 PM   #5
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Got the internals out and the block broken down last night. Going to take a razor blade and a dremel to it to get most of the old gaskets and silicone off so the shop doesn't have to do any extra work to it. Should be dropping it off sometime this week, either tomorrow or Friday. Pics to follow when I get home and take some.
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Unread 07-08-2015, 06:02 PM   #6
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Coming along nicely! I've always been a fan of the 300ZX, I'm very much looking forward to how this one comes out. Nice find on the manual btw.

The car's filthy so I can't really tell, what's the general condition of the exterior/interior? Can't say green is my favorite color but the interior looks nice.
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Unread 07-09-2015, 10:54 AM   #7
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Quote:
Originally Posted by enderx475 View Post
Coming along nicely! I've always been a fan of the 300ZX, I'm very much looking forward to how this one comes out. Nice find on the manual btw.

The car's filthy so I can't really tell, what's the general condition of the exterior/interior? Can't say green is my favorite color but the interior looks nice.
Didn't get a chance to get pics last night =(. I was working on installing the portable a/c unit I bought to keep my garage below 100F on the inside during the hot weekend days. Bought a 10k BTU that looked opened and turns out it was busted, compressor kicked on for a total of about a minute and it never got very cold. Gonna go return it today and look for a 12k BTU that has an intake and exhaust from the outside rather than just an exhaust.

Clear is pretty much gone on the hood and few other places. Pretty sure a full paint job is in order. My dads friend had a TT back in the day in a sweet factory white with pearl in it. I want to go back with that color. The interior is amazing considering how old the car is though, but it still needs to be replaced. I am thinking new carpet, suede liners if I can convince my dad to throw the cash at it, and some new bucket seats with 5-points harnesses.
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Unread 07-10-2015, 02:37 PM   #8
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Dropped the motor, heads, and crank off at the shop today.

Block

Bore: 0.020" + to 87.5mm
Deck (probably just a clean up pass of 0.002"-0.003")
Hone for crosshatching
Boil

Heads

Replace valve seals
Grind valve seats and valves
Polish cams and keepers
Deck (again, probably just a clean up pass)
Boil

Crank

Polish and check for balance
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Unread 07-11-2015, 03:11 PM   #9
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This will be a fun build!

Are there any upgrades for the stock turbos? I know the old supras and evo/sti have many options to upgrade the turbo internals with larger billet wheels and housings, but look bone stock from the out side.
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Unread 07-13-2015, 01:46 PM   #10
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Quote:
Originally Posted by pbasil1 View Post
This will be a fun build!

Are there any upgrades for the stock turbos? I know the old supras and evo/sti have many options to upgrade the turbo internals with larger billet wheels and housings, but look bone stock from the out side.
Yeah, a few people sell CHRA's to increase boost but the stock turbos actually make a good bit with the stock CHRA's, you just need to get an aftermarket adjustable wastegate actuator and a boost controller. I think stock the wastegates open at around 7psi and Z1 aftermarkets don't open till 10 and are adjustable for more.
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