Yet another GTX build thread. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Build Threads Building a motor? Post the progress here.

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 10-04-2010, 08:52 PM   #1
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default Yet another GTX build thread.

Ya ya, I bought one too. Mine needs quite a bit of work though. Its relatively rust free. Nothing major. The transmission in it is bad but it came with a good one. Right now i'm just stripping the engine bay down to get at that transmission.

Today I pretty much just removed the skid pan, some of the turbo heat shields, the radiator, the intercooler and associated plumbing, some shitty wiring from the previous owner, the grill and the AC system.

Having all of this out of the way makes it look like the tranny R&R is going to be pretty straight-forward. I'm more used to doing transmissions in RWD cars so this looks like it is going to be awkward getting it to stab onto the engine.

Anyway, pics!

How the engine bay looked before I got into it.
Name:  DSC02665.jpg
Views: 47
Size:  159.1 KB

The engine bay as it sits right now.
Name:  DSC02676.jpg
Views: 41
Size:  169.7 KB
Name:  DSC02674.jpg
Views: 40
Size:  135.8 KB

The rusty master cylinder and brake booster. Yuk.
Name:  DSC02683.jpg
Views: 37
Size:  138.9 KB

This turbo is teeny tiny!
Name:  DSC02678.jpg
Views: 36
Size:  110.8 KB

Some of the wiring I removed.
Name:  DSC02677.jpg
Views: 37
Size:  107.8 KB

Cracked turbo manifold. Pretty sure i'm just going to have to make a new one using Sched 10 stainless. I have all the pieces lying around except the turbo flange. The way these are cast leaves no room for thermal expansion and contraction. Doubt i'd bother replacing a broken manifold with another one that is just going to break eventually too.
Name:  DSC02680.jpg
Views: 39
Size:  115.9 KBName:  DSC02681.jpg
Views: 39
Size:  101.5 KB

What is this "bucket" area behind the headlight on the Left side? Could be a good spot to hide tools or something =P
Name:  DSC02682.jpg
Views: 39
Size:  113.5 KB

Anyway, thats just the beginning. It will get more interesting as I redo the turbo stuff and build a new exhaust etc. Eventually I believe I will be retrofitting either RX7 calipers (I have a set in the garage) or Escort GT calipers on VR4 rotors.

Edit: guess I should post some pics of the exterior as well.

Name:  DSC02660.jpg
Views: 39
Size:  153.1 KB
Name:  DSC02663.jpg
Views: 40
Size:  148.7 KB
Name:  DSC02661.jpg
Views: 40
Size:  134.0 KB
wayne_curr is offline   Reply With Quote
Old 10-04-2010, 09:20 PM   #2
Miotta FTW!
iTrader: (24)
 
Splitime's Avatar
 
Join Date: Jun 2006
Location: Chicagoland, IL
Posts: 4,295
Total Cats: 26
Default

If/when my brake job happens... I'm doing a ford festiva non-floating rotor on all 4 corners. Allows you do get rid of the LAME captured rotor and is an upgrade in size.

Just a random thought.

Reminds me once again... i need to go pickup the spare GTX. Sigh, so lazy.
Splitime is offline   Reply With Quote
Old 10-04-2010, 09:24 PM   #3
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Quote:
Originally Posted by Splitime View Post
If/when my brake job happens... I'm doing a ford festiva non-floating rotor on all 4 corners. Allows you do get rid of the LAME captured rotor and is an upgrade in size.

Just a random thought.

Reminds me once again... i need to go pickup the spare GTX. Sigh, so lazy.
That is the same idea behind using the VR4 rotors. They end up being outboard instead of the stock inboard configuration. They are also substantially larger than stock.
wayne_curr is offline   Reply With Quote
Old 10-04-2010, 09:26 PM   #4
Miotta FTW!
iTrader: (24)
 
Splitime's Avatar
 
Join Date: Jun 2006
Location: Chicagoland, IL
Posts: 4,295
Total Cats: 26
Default

Quote:
Originally Posted by wayne_curr View Post
That is the same idea behind using the VR4 rotors. They end up being outboard instead of the stock inboard configuration. They are also substantially larger than stock.
Then lead on and document

What spindle set are you using?
Splitime is offline   Reply With Quote
Old 10-04-2010, 11:45 PM   #5
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Quote:
Originally Posted by Splitime View Post
Then lead on and document

What spindle set are you using?
The stock GTX. Bob told me he's converted a GTX to use AWD protege hugs/spindles which eliminates these horrible wheel bearings we're stuck with. Unfortunately the AWD protege is just as rare as these :(

Check out the VR4 rotor vs stock.



Also, here are some variations of the RX7 caliper. I'd come up with a much better mounting solution than either of these, but it looks like a pretty good fit.




This is the RX7s in the rear.


All from this thread:
http://www.clubprotege.com/forum/sho...t=40913&page=1
wayne_curr is offline   Reply With Quote
Old 10-04-2010, 11:48 PM   #6
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,110
Total Cats: 518
Default

Quote:


GTXs don't mess around with manifold cracking, do they?

A bead blast cabinet and a can of spray paint would be heaven right now, huh?
curly is offline   Reply With Quote
Old 10-04-2010, 11:56 PM   #7
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Quote:
Originally Posted by curly View Post


GTXs don't mess around with manifold cracking, do they?

A bead blast cabinet and a can of spray paint would be heaven right now, huh?
On the cracking; the B6T manifold is a pretty crappy design. There is no way to make relief cuts in the head flange to allow for thermal expansion/contraction so every one of them is doomed to crack right down the middle eventually.

haha, I figured you'd get a kick out of that nasty engine bay. I really want to pull everything and clean/re paint it but I really just want to get this thing on the road for the winter. I'm so close to just buying a miata long block and swapping it in so I can just pull everything out and go over it with a fine tooth comb. I dont have the time though and I want to finally get into snowboarding this winter so I'll need this car for trips up the mountain in the snow.

Yes, a bead blast cabinet would be heaven.
wayne_curr is offline   Reply With Quote
Old 10-05-2010, 12:01 AM   #8
Elite Member
iTrader: (17)
 
Join Date: Apr 2009
Location: Atlanta, GA
Posts: 2,831
Total Cats: 0
Default

Damn, you two are really makin me want to go find one of these!
WonTon is offline   Reply With Quote
Old 10-05-2010, 12:04 AM   #9
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Quote:
Originally Posted by WonTon View Post
Damn, you two are really makin me want to go find one of these!
They are not a project for the timid, thats for sure. I've still never driven one. I'm really hoping the work pays off in the end. I'm pretty sure it will but you never know =P I could end up selling it for something else AWD like a legacy. I've jizzed over these for about 10 years now so i'm pretty sure i'll love it
wayne_curr is offline   Reply With Quote
Old 10-05-2010, 12:10 AM   #10
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,110
Total Cats: 518
Default

Are you pulling the engine to do the transmission? If so, beg/borrow/plead/steal a pressure washer. Spray the bay down with pure simple green, wait 15 minutes, and pressure wash. Repeat. Use compressed air on the rust junk, maybe a blow dryer, to keep it from rusting more.

Then buy stock in Armor All.
curly is offline   Reply With Quote
Old 10-05-2010, 12:14 AM   #11
Elite Member
iTrader: (17)
 
Join Date: Apr 2009
Location: Atlanta, GA
Posts: 2,831
Total Cats: 0
Default

when you drive it for the first time dont compare it to a turbo miata! lol

i dont need to be thinkin bout getting another project yet. my hands are to full already, but when my car is close to where i want it im gonna need to pick somthing up to keep me from wanting to change stuff on the miata.
WonTon is offline   Reply With Quote
Old 10-06-2010, 03:44 PM   #12
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Some unfortunate compression numbers today.

155 155 90 115

That 90 jumped to 155 with some oil in the cylinder :(
wayne_curr is offline   Reply With Quote
Old 10-06-2010, 03:53 PM   #13
Miotta FTW!
iTrader: (24)
 
Splitime's Avatar
 
Join Date: Jun 2006
Location: Chicagoland, IL
Posts: 4,295
Total Cats: 26
Default

Bummer :(

Swap a Miata motor in for some more fun.
Splitime is offline   Reply With Quote
Old 10-06-2010, 04:04 PM   #14
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Quote:
Originally Posted by Splitime View Post
Bummer :(

Swap a Miata motor in for some more fun.
I'm on the hunt for one right now. If nothing else I'll just swap the long nose crank and new pistons into the GTX engine.

This is a common problem with these cars. They like to burn up cylinder #3 for some reason. The GTX engine in my miata had a bad #3, bbundy's cars have ruined #3 cyls as well. He suspects its something to do with the intake manifold feeding air better to #3 than the rest.
wayne_curr is offline   Reply With Quote
Old 10-06-2010, 05:25 PM   #15
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

Awesome...but man what a rough car.

Hope it polishes up and turns out to be a gem.
gospeed81 is offline   Reply With Quote
Old 10-06-2010, 05:30 PM   #16
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Quote:
Originally Posted by gospeed81 View Post
Awesome...but man what a rough car.

Hope it polishes up and turns out to be a gem.
I know, you really have to look hard (and be slightly mental) to see the potential in this car. If there weren't only >500 of these registered in the states I wouldn't have bought it but the rarity encourages me to bring it back.

Also the interior is actually in great shape.
wayne_curr is offline   Reply With Quote
Old 10-11-2010, 10:52 PM   #17
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Phew, motor is finally out. Really wasn't any more difficult than a miata engine pull, perhaps even easier. Having more space in my garage would have made this much easier. The whole drivetrain could easily slip out under the left side frame rail.

Illustrating the tiny space i'm working with. My bench was only 2 feet behind that hoist. Just barely enough space to maneuver it.
Name:  DSC02694.jpg
Views: 40
Size:  150.4 KB

Engine on the ground in the engine bay while I decided how I was going to get it out.
Name:  DSC02695.jpg
Views: 40
Size:  168.2 KB

You can kind of see how it would have slipped under the frame rail easily if I had the space and a skateboard.
Name:  DSC02696.jpg
Views: 40
Size:  142.4 KB

Decided it just needed to come out the top.
Name:  DSC02697.jpg
Views: 40
Size:  120.9 KB

Tiny little turbo and cracked manifold.
Name:  DSC02698.jpg
Views: 47
Size:  149.6 KB

I really want to put this oil feed hardline on my miata. I'm going to either make one or find one from a B6T.
Name:  DSC02700.jpg
Views: 91
Size:  137.3 KB

And the engine/trans on the floor. It took a million turns of the hoist to get the motor turned 90 degrees from the way it was sitting in the engine bay.
Name:  DSC02701.jpg
Views: 41
Size:  153.0 KB

Lots of cleanup to do. Need to get my hands on a pressure washer.
Name:  DSC02703.jpg
Views: 39
Size:  136.1 KB

Overall it wasn't a bad job. Again, its really weird working on the same motor thats in my miata in this configuration. The starter and alternator are remarkably difficult to get to when the motor is in the car.
wayne_curr is offline   Reply With Quote
Old 10-13-2010, 04:09 PM   #18
Junior Member
iTrader: (6)
 
Join Date: Jan 2006
Location: St Johns, Fl
Posts: 378
Total Cats: 0
Default

You just reminded me of the time I had to replace the alternator in my GTX (twice). Had to remove and engine mount and pry the engine forward with a 2x4 to get it out the top. Crazy.
clay is offline   Reply With Quote
Old 10-14-2010, 02:14 AM   #19
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

I'm thinking this might be in my future.

Name:  45437_439581080848_608745848_5574848_1210552_n.jpg
Views: 41
Size:  54.8 KB
wayne_curr is offline   Reply With Quote
Old 10-14-2010, 02:18 PM   #20
Junior Member
iTrader: (3)
 
Join Date: Apr 2008
Location: Marietta, Ga
Posts: 224
Total Cats: -1
Default

I think you need this, comes with extra tranny too.
http://cgi.ebay.com/ebaymotors/JDM-M...#ht_3728wt_939

and then you can sell me your upper 1.6 cam gear cover, rods, and cams.

Last edited by JEMERY; 10-14-2010 at 02:38 PM.
JEMERY is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Is my swirl pot design okay? FrankB Race Prep 10 10-02-2015 10:00 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:55 PM.