Time to rebuld the 1.6L - suggestions? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 11-12-2010, 03:20 AM   #1
Newb
Thread Starter
 
Join Date: Nov 2007
Posts: 22
Total Cats: 0
Default Time to rebuld the 1.6L - suggestions?

I am in the process of tearing my 1.6 down in order to chance bearings, hone cylinders etc. and find out what condition it is in as I have not been into the engine yet. Any suggestions as to easy mods that should be done while the engine is out? And what brand of head gasket and bearings?

It is a 1.6L with a FMII turbo (garrett T24) running about 12PSI

Here is a list of things I plan to accomplish so far:
main bearings
rings
head gasket
oil pressure sending unit
oil temperature sensor
hone block
head studs?
Coolant reroute?
Turbo rebuild kit
slyfox03 is offline   Reply With Quote
Old 11-12-2010, 03:34 AM   #2
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,184
Total Cats: 2,582
Default

h-beam rods
18psi is offline   Reply With Quote
Old 11-12-2010, 04:32 AM   #3
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

H-beams and a Cometic head gasket. Leave everything else stock.
Savington is offline   Reply With Quote
Old 11-12-2010, 08:29 AM   #4
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

Quote:
Originally Posted by Savington View Post
H-beams and a Cometic head gasket. Leave everything else stock.
This.

Coolant route is a good idea while it's out...and you can do some bowl blending if you're feeling up to it.
gospeed81 is offline   Reply With Quote
Old 11-12-2010, 10:40 AM   #5
Newb
Thread Starter
 
Join Date: Nov 2007
Posts: 22
Total Cats: 0
Default

Good suggestion on bowl blending; I am certainly up to it.

I will probably pass on the h-beams unless someone knows where to get them for cheap (unless they are absolutely necessary). I am on a rather tight budget unless of course this is the limiting factor in increasing the boost

I read a long thread on main bearings last night but it left me just as confused. This will be a daily driver; any thoughts? OEM or Clevite?

Also is there a way to tell for sure if the turbo needs rebuilt? Both the intake side and the exhaust side have a tiny bit of movement if you try to wiggle them back and forth.
slyfox03 is offline   Reply With Quote
Old 11-12-2010, 02:03 PM   #6
Elite Member
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

buy my pistons to go with those rods :P
https://www.miataturbo.net/miata-parts-sale-trade-5/fs-supertech-8-8-1-pistons-1-6-a-53423/

The rods in the group buy here or on 949 racing website are fairly cheap.
rods tend to to be in a sketchy zone above ~230wtq
shlammed is offline   Reply With Quote
Old 11-13-2010, 12:12 AM   #7
Guest
 
Join Date: Mar 2006
Location: So Cal
Posts: 407
Total Cats: 0
Default

Quote:
Originally Posted by Savington View Post
H-beams and a Cometic head gasket. Leave everything else stock.
Really? So about 400 bucks into the motor and he'll be fine? I'm not doubting you or anything just curious. Don't the piston rings suck ***** on the oem pistons as well?
krayzrac3r is offline   Reply With Quote
Old 11-13-2010, 12:25 AM   #8
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

Rods are definitely worth it if you're doing anything. Can be had on eBay for $220, or from one of our reputable vendors with ARP fasteners for $300.

The difference is pushing it at <250 and being comfortable between 250-300.
gospeed81 is offline   Reply With Quote
Old 11-13-2010, 01:58 AM   #9
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,184
Total Cats: 2,582
Default

Quote:
Originally Posted by slyfox03 View Post
Good suggestion on bowl blending; I am certainly up to it.

I will probably pass on the h-beams unless someone knows where to get them for cheap (unless they are absolutely necessary). I am on a rather tight budget unless of course this is the limiting factor in increasing the boost

I read a long thread on main bearings last night but it left me just as confused. This will be a daily driver; any thoughts? OEM or Clevite?

.
Wow you are deciding to pass on one of the single most important things to upgrade in our engines.
While choosing to do a bunch of others that really aren't necessary.
good luck with that
18psi is offline   Reply With Quote
Old 11-13-2010, 05:52 AM   #10
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

Quote:
Originally Posted by slyfox03 View Post

I will probably pass on the h-beams unless someone knows where to get them for cheap (unless they are absolutely necessary).
They are absolutely necessary. If you rebuild a motor with aftermarket parts and you don't swap the rods for forged h-beams, expect endless ridicule and a probable dick avatar on this forum.
Savington is offline   Reply With Quote
Old 11-14-2010, 12:11 PM   #11
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

Get a good valve job, and make sure the guides and seals are good. maybe a little home brew head porting before hand while you are blending the bowls.
Gotpsi? is offline   Reply With Quote
Old 11-16-2010, 12:18 PM   #12
Newb
Thread Starter
 
Join Date: Nov 2007
Posts: 22
Total Cats: 0
Default

so h-beam rods it is. I hadn't priced them before and i figure while I am in the engine I might as well do it right. Pistons are okay stock though? I am pulling the block tonight and should know a lot more.

Any vendors sell a rebuild kit for a t24? I can move the shaft up and down just a tiny bit and the intercooler pipes have some oil residue in them.
slyfox03 is offline   Reply With Quote
Old 11-16-2010, 12:24 PM   #13
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,184
Total Cats: 2,582
Default

You have to check pistons over and make the decision whether "they're good enough".

Pull em, clean em to near mirror shine, make sure there's no detonation all over em or scratches/inperfections, re-ring and you should be good. rods really are not expensive: from 200 for no name to 300 for name brand.
18psi is offline   Reply With Quote
Old 11-18-2010, 11:31 AM   #14
Elite Member
iTrader: (8)
 
Join Date: Sep 2006
Location: Severn, MD
Posts: 1,927
Total Cats: 5
Default

1.8
fmowry is offline   Reply With Quote
Old 11-30-2010, 11:46 PM   #15
Newb
Thread Starter
 
Join Date: Nov 2007
Posts: 22
Total Cats: 0
Default

Looks like I am now in the market for pistons. I started cleaning the #4 piston and it is very porous on the edge and down to the ring groove. Any idea what causes this?

The block is honed and is stock bore. Anybody have a good deal on stock bore pistons? Are the aftermarket pistons worth it or are stockers good for my app.?
slyfox03 is offline   Reply With Quote
Old 12-01-2010, 12:00 AM   #16
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

detonation
Gotpsi? is offline   Reply With Quote
Old 12-01-2010, 12:19 AM   #17
Elite Member
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

Quote:
Originally Posted by shlammed View Post
buy my pistons to go with those rods :P
https://www.miataturbo.net/showthread.php?t=53423

make me an offer... they are sitting in box on my desk ready to be shipped out.
shlammed is offline   Reply With Quote
Old 12-16-2010, 04:48 PM   #18
Junior Member
 
Join Date: Mar 2006
Location: San Jose, CA
Posts: 108
Total Cats: 0
Default

u got mail!
zbossrt is offline   Reply With Quote
Old 12-21-2010, 01:43 PM   #19
Newb
Thread Starter
 
Join Date: Nov 2007
Posts: 22
Total Cats: 0
Default

Need a little help regarding pistons. I found some stock pistons for cheap however three have 6 F cast into the side near the wrist pin and 1 has 5 F. They look the same other than the 5 F piston top being a bit smoother (less pits where the pistons are clearanced for valves).

I believe my origional pistons are 7 F but will have to check for sure. My question is whether or not the 6 F pistons are the same. Any idea?
slyfox03 is offline   Reply With Quote
Old 12-21-2010, 05:22 PM   #20
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

Doubt it. May refer to the overbore size. You need to be careful with wall clearances when you hone a motor and swap pistons.
Savington is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Need help - Stock Balancer and Fastforward overlay pulleys Frank_and_Beans Supercharger Discussion 13 09-12-2016 09:17 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM


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 06:52 PM.