RotorNut's Build Thread - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 08-09-2008, 12:13 PM   #41
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Quote:
Originally Posted by RotorNutFD3S View Post
Thanks man! LagunaRoadster is selling me the pistons out of his '96 motor. If there is anything wrong with them, which there shouldn't be, I'll give you a call.
At this rate, you need to go ahead and get them, just in case.
Ben is offline   Reply With Quote
Old 08-09-2008, 12:27 PM   #42
Senior Member
iTrader: (2)
 
Join Date: Nov 2007
Location: orlando, FL
Posts: 558
Total Cats: 0
Default

Quote:
Originally Posted by RotorNutFD3S View Post
Thanks man! LagunaRoadster is selling me the pistons out of his '96 motor. If there is anything wrong with them, which there shouldn't be, I'll give you a call.


Eh, figured you'd read the thread and see. But oh well. They are very nice, can't wait to put them to good use! Thanks again!
anytime buddy... hopefully somewhere down the line i'll have some extra cash on the side a few years from now to do a monster miata or a 400RWHP miata.... i know what i need and what i need to do, i just haven't got the monies :(
XxGoKoUxX is offline   Reply With Quote
Old 08-09-2008, 02:34 PM   #43
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Quote:
Originally Posted by Ben View Post
At this rate, you need to go ahead and get them, just in case.
Very funny... lol
RotorNutFD3S is offline   Reply With Quote
Old 08-15-2008, 12:19 AM   #44
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

First part of my update, and this may be common knowledge to some, but for people (like me) who are comparing t25/t28 turbos, this was a good quick reference tool:

Lets break it down.
The GT2871R is known as ....well....the GT2871R
The GT28RS is known as the GT2860R
The GT28R is known as the GT2560R

TURBINE

GT2560R
* Wheel: 53mm w/ 62 trim
* Housing: .64 ar

GT2860R

* Wheel: 53.85mm w/ 76 trim
* Housing: .64 or .86 ar

GT2871R
* Wheel: 53.85mm w/ 76 trim
* Housing: .86 or .64 ar

COMPRESSOR
GT2560R
* Wheel: 60mm w/ 60 trim
* Housing: .60 ar
Flow : 320hp

GT2860R

* Wheel: 60mm w/ 62 trim
* Housing: .60 ar
Flow : 350hp

GT2871R
* Wheel: 71mm w/ 56 trim
* Housing: .60 ar
Flow : 400hp

Anyway, after a day full of research (and one failed attempt at picking up a turbo because of a dishonest or confused seller) I'm trying to find a .64 a/r GT2871R turbo because I think that at 15psi, I'm about at the limits of the 2560R, and the 2871 isn't too big of a turbo for our cars.
I'm just concerned as to if it's a worthwhile move, or if I should be happy with what I have for a mildly built daily driver. Input?

In any case, my ARP head and main studs arrived today. Got a pretty good deal I think at $185/shipped for both.
Still got to get the pistons coated, and then the block and parts can go to a machine shop. Need to test the injectors and make sure that they aren't responsible for this mess. And now I need a passenger side rear brake caliper, because mine seized up and won't release the e-brake unless you reach under and release it manually. No amount of PB Blaster and working it will free it up.

And I'm hoping the GB and actual production of the billet oil pump gears doesn't take much longer, as I'm sure others are as well. I'd like to get them installed at the same time as all the other work instead of having to pause the rebuild to wait for them to arrive.
RotorNutFD3S is offline   Reply With Quote
Old 08-15-2008, 02:43 PM   #45
Elite Member
iTrader: (10)
 
leatherface24's Avatar
 
Join Date: Dec 2006
Location: Pembroke Pines
Posts: 4,033
Total Cats: 2
Default

I know for a fact on that car the turbo started to run out of juice after 15psi. If your looking for more power, i say GT2860R
leatherface24 is offline   Reply With Quote
Old 08-15-2008, 03:30 PM   #46
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Quote:
Originally Posted by leatherface24 View Post
I say GT2860R
**** that. The 71 was designed by Garrett to stomp out the 60 (newer, more efficient blade design).
Ben is offline   Reply With Quote
Old 08-15-2008, 03:37 PM   #47
Junior Member
 
Join Date: Nov 2007
Location: Ontario, Canada
Posts: 106
Total Cats: 1
Default

But how much later will it take for the 71 to spool? Or because of this new blade design is it close to the 60?
NoiseRacing is offline   Reply With Quote
Old 08-15-2008, 03:39 PM   #48
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

No real world difference in spool. As I understand, the upgrades are in the compressor side.

Eric, you know you can get that local 71 and change exhaust housings right? I mean, if it's cheap enough.
Ben is offline   Reply With Quote
Old 08-15-2008, 05:56 PM   #49
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Yeah, I know. It wasn't that great of a price though. And the guy was a dumbass.
RotorNutFD3S is offline   Reply With Quote
Old 08-18-2008, 07:27 PM   #50
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Well, finding a nice, used 2871 for a decent price has proved almost impossible. I'm beginning to just think it might be a wiser idea to stick with the 2560 I have, go with BEGi's new manifold, and be happy with it since the car is going to be a daily driver.
RotorNutFD3S is offline   Reply With Quote
Old 08-18-2008, 09:59 PM   #51
Elite Member
iTrader: (10)
 
leatherface24's Avatar
 
Join Date: Dec 2006
Location: Pembroke Pines
Posts: 4,033
Total Cats: 2
Default

the turbo never did you wrong dude. even though id like to have it again, i think you should keep and put the new manifold on.
leatherface24 is offline   Reply With Quote
Old 08-19-2008, 09:26 AM   #52
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

or just have the old manifold cleaned up on the inside
Ben is offline   Reply With Quote
Old 08-19-2008, 12:21 PM   #53
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Outside of the Loop-ATL
Posts: 754
Total Cats: 0
Default

Quote:
Originally Posted by Ben View Post
or just have the old manifold cleaned up on the inside
I am with Ben on this one, just sit down and clean up the old manifold.
wildfire0310 is offline   Reply With Quote
Old 08-19-2008, 06:45 PM   #54
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

I might look into that. Just sit down with the Dremel and go at it. I have plenty of the attachments to get it done.
On the other hand, I'm pretty sure no matter what I do, it will never be as efficient as the newer design.
RotorNutFD3S is offline   Reply With Quote
Old 08-20-2008, 10:15 AM   #55
Senior Member
iTrader: (19)
 
Join Date: Oct 2007
Location: MoCo, MD
Posts: 703
Total Cats: 0
Default

Would you happen to have the torque specs for the bottom end? (Rods, mains, clearances) I cannot find them anywhere?
pschmidt is offline   Reply With Quote
Old 08-20-2008, 09:08 PM   #56
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Nope, sure don't. Leaving that to the machine shop.
RotorNutFD3S is offline   Reply With Quote
Old 09-02-2008, 06:47 PM   #57
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

OK, noob question time.
The OEM rods have pressed-in wrist pin bushings. Do the CAT rods require bushings for the wrist pin, or just machining to make them fit?
Just as a side note, my wrist pins fit perfectly into the CAT rods, which is why I ask.
RotorNutFD3S is offline   Reply With Quote
Old 09-08-2008, 10:29 PM   #58
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

So I got some seals, gaskets, belts, pumps, pulleys, and bearings from Finishline to rebuild the engine and trans. Oh, and the Workshop Manual too since they are on sale.
Not from Finishline are my ARP head and main studs and the pulley/bracket for adding a/c without power steering.

Name:  DSC02197.jpg
Views: 3
Size:  94.2 KB

And while I was at it, I snagged a set of MSM pedals and an oil cap, not exactly needed, but oh well.

Now, it's time to take the pistons to get ceramic coated and the rods cryo treated.
Then, to the machine shop.

Anyone have an answer to my question in the post above?
RotorNutFD3S is offline   Reply With Quote
Old 09-22-2008, 10:56 PM   #59
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

So today ended on a good note, this showed up on the doorstep:

56 Trim GT2871R (743347-2) - .60/.64
Hopefully will be a nice bump in power! And of course, I took it apart, but I needed to because the turbine housing is going off to get ported, fit for 10mm studs, have the cast-in divider (which is a nice feature) finished, and ceramic coated by BEGi along with the new manifold.

Pictures of course:
Name:  DSC02266.jpg
Views: 3
Size:  92.8 KB
Name:  DSC02267.jpg
Views: 3
Size:  94.1 KB
Name:  DSC02268.jpg
Views: 3
Size:  67.3 KB
Name:  DSC02270.jpg
Views: 3
Size:  74.4 KB
Name:  DSC02272.jpg
Views: 3
Size:  70.6 KB
RotorNutFD3S is offline   Reply With Quote
Old 10-08-2008, 08:22 PM   #60
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Been busy as far as acquiring parts go.
A couple weeks ago, I got my 3" Enthuza dual outlet exhaust, gently used, and got a great deal too:

Name:  DSC02276.jpg
Views: 3
Size:  110.1 KB

Got my internals and valve cover back today. The valve cover is powdercoated, the pistons have a ceramic coated dome, dry film lubricant on the skirts, and an oil shedding coating on the undersides. The rods were simply cryo-treated.

Name:  DSC02456.jpg
Views: 3
Size:  70.5 KB
Name:  DSC02457.jpg
Views: 3
Size:  72.9 KB
Name:  DSC02458.jpg
Views: 3
Size:  38.4 KB
Name:  DSC02459.jpg
Views: 3
Size:  58.3 KB
Name:  DSC02462.jpg
Views: 3
Size:  35.4 KB
Name:  DSC02463.jpg
Views: 3
Size:  56.0 KB

Also have these stock sized Supertech valves thanks to Neogenesis:

Name:  DSC02455.jpg
Views: 3
Size:  77.9 KB

Unrelated to the engine build, I snagged these Tein SS coilovers w/ NB tophats and FM front sway bar (with new bushings).

Name:  DSC02279.jpg
Views: 3
Size:  100.2 KB

Within the next week or so I will have a '99 head, 6-speed transmission, and a set of new 3.636 gears.

I can't wait until this car is on the road again.

Last edited by RotorNutFD3S; 10-12-2008 at 06:51 PM.
RotorNutFD3S is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM


Thread Tools

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 10:57 AM.