Swap vs rebuild - 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 04-08-2016, 09:36 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2016
Posts: 441
Total Cats: 21
Default Swap vs rebuild

So my rings on my 95 just gave way with in a week of running turbo, now do I A. Pull the motor, machine everything, , maybe even do rods and some other "insurance" mods, or B. Switch to a bp4w, I would go vvti but I don't want to upgrade my ms just yet. What would be the most cost effective way to reach the 250 whp before other components become reliable to break. This will be my first engine rebuild on a Miata. I know a lot of things will need to be replaced from just pulling the motor, I am prepared to spend the $ and shell out the time. I'm not expecting spoon feeding, I know this is the wrong forum for that but what are some pros and cons about both
Forrest95M is offline   Reply With Quote
Old 04-08-2016, 09:42 PM   #2
Elite Member
iTrader: (9)
 
Join Date: Sep 2008
Location: Livonia, Michigan
Posts: 5,684
Total Cats: 10
Default

Swap = unknown
Rebuild = known

If you are willing to spend just rebuild. If you want a quick fix search for a cheap motor.
buffon01 is offline   Reply With Quote
Old 04-09-2016, 01:35 AM   #3
Elite Member
iTrader: (6)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 2,407
Total Cats: 200
Default

He pretty much summed it up. Buy a trackspeed bottom end and enjoy life.
ryansmoneypit is offline   Reply With Quote
Old 04-09-2016, 01:41 AM   #4
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,367
Total Cats: 1,332
Default

Quote:
Originally Posted by ryansmoneypit View Post
He pretty much summed it up. Buy a trackspeed bottom end and enjoy life.
I'm biased, but yeah, I agree with this.

I'm not ready to say anything for sure, but we've made some changes to our engine program that will substantially reduce our leadtimes on our "standard" turbo-spec bottom end. I'll reveal more in an official announcement when it's nailed down.

Last edited by Savington; 04-09-2016 at 02:21 AM.
Savington is offline   Reply With Quote
Old 04-09-2016, 10:10 AM   #5
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,895
Total Cats: 1,792
Default

whatever you do, fix what you did to blow the first so it doesnt happen to the second as well in another week.
Braineack is offline   Reply With Quote
Old 04-09-2016, 10:15 AM   #6
Junior Member
Thread Starter
 
Join Date: Jan 2016
Posts: 441
Total Cats: 21
Default

Quote:
Originally Posted by Braineack View Post
whatever you do, fix what you did to blow the first so it doesnt happen to the second as well in another week.
As much as I thought it was me, I think this car was left sitting for a long period of time and wasn't maintained. Like I said before, compression tests before turbo was good not great, I guess we will see when I pull it apart. It was only running 8 psi on a retarded timing map, with det can headphones, and ve analyze going.
Forrest95M is offline   Reply With Quote
Old 04-09-2016, 10:18 AM   #7
Elite Member
iTrader: (6)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 2,407
Total Cats: 200
Default

Retarded timing maps melt things. No?
ryansmoneypit is offline   Reply With Quote
Old 04-09-2016, 10:30 AM   #8
Junior Member
Thread Starter
 
Join Date: Jan 2016
Posts: 441
Total Cats: 21
Default

I guess they do, but also I do remember getting some wiffs of gasoline doing my last NA oil change. I'm sure my retarded map didn't help
Forrest95M is offline   Reply With Quote
Old 04-09-2016, 11:08 AM   #9
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,812
Total Cats: 185
Default

I bought a 2000 1.8 a few years back that had 78,000 miles on it and a blown head gasket. A few months ago I finally cleaned it up, measured the clearances, honed it and put new rings in it. I'm going to be listing it for sale soon...interested?
thirdgen is offline   Reply With Quote
Old 04-10-2016, 06:52 PM   #10
Elite Member
iTrader: (17)
 
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,791
Total Cats: 130
Default

What's the car doing? Why do you think it's the rings? You can break anything, but these motors are pretty solid.

I've beat the crap out of several sets of "mystery" stock pistons/rings with a lot of miles on them, for a long time, and done pretty much everything wrong and never gotten more than a little blue puff when I lift. It'd be a shame to tear down a motor over some simple, cheap issue, especially if you just made some major changes that could potentially be what's causing the problem.
pdexta is offline   Reply With Quote
Old 04-10-2016, 07:07 PM   #11
Junior Member
Thread Starter
 
Join Date: Jan 2016
Posts: 441
Total Cats: 21
Default

Quote:
Originally Posted by pdexta View Post
What's the car doing? Why do you think it's the rings? You can break anything, but these motors are pretty solid.

I've beat the crap out of several sets of "mystery" stock pistons/rings with a lot of miles on them, for a long time, and done pretty much everything wrong and never gotten more than a little blue puff when I lift. It'd be a shame to tear down a motor over some simple, cheap issue, especially if you just made some major changes that could potentially be what's causing the problem.
Last two cylinders 140 psi, oil poured in, 175 psi
Forrest95M is offline   Reply With Quote
Old 04-10-2016, 10:25 PM   #12
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,812
Total Cats: 185
Default

Forgot to mention...it will be a short block that I'll have for sale. Which is. 9.5:1 compression.
If you do choose to rebuild your own motor, I highly recommend it just for the learning experience. It's fun too.
thirdgen is offline   Reply With Quote
Old 04-10-2016, 10:32 PM   #13
Junior Member
Thread Starter
 
Join Date: Jan 2016
Posts: 441
Total Cats: 21
Default

So i can still drive the car, and I will, come maybe next week when I have to do the clutch. I'll pull my engine and trans, pull head, remove oil pan, punch pistons up from bottom, diy hone, and re assemble. Estimated time with 2 people? And any objections to this?
Forrest95M is offline   Reply With Quote
Old 04-10-2016, 10:47 PM   #14
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,812
Total Cats: 185
Default

Better not make any plans at all next weekend...
thirdgen is offline   Reply With Quote
Old 04-10-2016, 10:58 PM   #15
Junior Member
Thread Starter
 
Join Date: Jan 2016
Posts: 441
Total Cats: 21
Default

Quote:
Originally Posted by thirdgen View Post
Better not make any plans at all next weekend...
Got all week
So entire engine gasket kit, piston rings, motor mounts? And timing belt and water pump?
Should the head have anything done to it?
Forrest95M is offline   Reply With Quote
Old 04-11-2016, 12:29 AM   #16
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,812
Total Cats: 185
Default

Oil Pan gasket maker...valve seals. Torque everything correctly. Use a stone hone not a ball hone. Watch a YouTube video about honing. Don't stay in it too long, just enough to make the appropriate angle of the cross hatch marks. Pull the oil squirters, cause if you hit em with the hone...bye bye stones.
Hope that helps. Just my 2 cents.
thirdgen is offline   Reply With Quote
Old 04-20-2016, 03:18 PM   #17
Newb
 
Join Date: Apr 2016
Posts: 1
Total Cats: -4
Default nissan sr20

Is the sr a viable swap for the miata
jameswhite is offline   Reply With Quote
Old 04-20-2016, 03:30 PM   #18
Senior Member
iTrader: (1)
 
Join Date: Dec 2010
Location: Farmington Hills, MI
Posts: 878
Total Cats: 93
Default

Quote:
Originally Posted by jameswhite View Post
Is the sr a viable swap for the miata
Yes. Do it.
acedeuce802 is offline   Reply With Quote
Old 04-21-2016, 04:38 PM   #19
Senior Member
iTrader: (6)
 
Join Date: Sep 2007
Posts: 1,086
Total Cats: 30
Default

Quote:
Originally Posted by jameswhite View Post
Is the sr a viable swap for the miata
Yeah the BP (miata motor) is actually a shortened version of the SR. The SR bolts right up to the motor mounts/tranny/etc,
albumleaf is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Miata goodies motor and turbo parts! Silentoreo34 Miata parts for sale/trade 12 02-27-2016 02:23 PM
Turbo and Engine Parts Galore! - GT2560, Eagle Rod, Supertech FM Manifold & much more cyotani Miata parts for sale/trade 9 10-26-2015 11:18 AM
motor back in, running rich and backfires Clos561 MEGAsquirt 14 08-30-2012 01:14 PM
Modded N/A engine/head: Use directly for a turbo setup? bond007 Engine Performance 2 11-07-2009 05:15 AM
Pulled Fuel pump relay and car is still running FTL Cutler ECUs and Tuning 4 04-02-2009 09:32 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 01:20 PM.