Question about a 1.8 swap. - 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 11-12-2009, 03:17 PM   #1
Newb
Thread Starter
iTrader: (2)
 
Join Date: May 2009
Posts: 27
Total Cats: 0
Default Question about a 1.8 swap.

im not sure if this is the right place to post this but, i found a 2002 miata wrecked in the back and hes selling it cheap. the motor, drive shaft, and diff. are all in good shape.

i have a 1991 miata, exactly how much work and what extra parts would i need to swap the 2002 1.8 ( engine, breaks, and rear-end ) into my 1.6 car?

thanks for all the input, it will all help in some way.
popesatan is offline   Reply With Quote
Old 11-12-2009, 03:23 PM   #2
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

All bolt in stuff.

You'll need the swap kit from Flyin' Miata for the motor...has some adapter brackets and such...under $200.

There are write-ups on the brake and diff swaps as well.
gospeed81 is offline   Reply With Quote
Old 11-12-2009, 03:33 PM   #3
Junior Member
iTrader: (34)
 
Join Date: Oct 2007
Location: Garner, NC
Posts: 269
Total Cats: 0
Default

The 2002 has VVT. Is there a way to control that in a 1991 now, without having to rewire for the 2002 ECU?
harleybutter is offline   Reply With Quote
Old 11-12-2009, 03:36 PM   #4
Newb
Thread Starter
iTrader: (2)
 
Join Date: May 2009
Posts: 27
Total Cats: 0
Default

Flyin' Miata : Tech: 1.8 conversion
thats what iv read so far and it says..
"The 2001-05 heads also have Variable Valve Timing, which is a problem unless you have an aftermarket ECU like the Hydra Nemesis to control it. "
popesatan is offline   Reply With Quote
Old 11-12-2009, 04:00 PM   #5
Elite Member
iTrader: (41)
 
Join Date: Jan 2006
Location: Seabrook, TX
Posts: 2,409
Total Cats: 19
Default

Take the diff/axles/driveshaft/brakes and sell everything else. If you want a 1.8L you can pick up a used 94-97 for $350 or a 99-00 for $900 with the better flowing head. If you are staying NA, just get a 94-97. Both of those engines will work with your current setup without the need for an aftermarket ecu.
rharris19 is offline   Reply With Quote
Old 11-12-2009, 04:02 PM   #6
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

Quote:
Originally Posted by popesatan View Post
Flyin' Miata : Tech: 1.8 conversion
thats what iv read so far and it says..
"The 2001-05 heads also have Variable Valve Timing, which is a problem unless you have an aftermarket ECU like the Hydra Nemesis to control it. "
'Doh

Yeah...that would be a problem.
gospeed81 is offline   Reply With Quote
Old 11-12-2009, 04:18 PM   #7
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,327
Total Cats: 1,926
Default

Quote:
Originally Posted by popesatan View Post
"The 2001-05 heads also have Variable Valve Timing, which is a problem unless you have an aftermarket ECU like the Hydra Nemesis to control it. "
Call DIYAutoTune. They have a module that will run VVT in closed-loop mode. It's intended to operate alongside a MegaSquirt, but I expect it could be made to work with any ECU, including a stock one.

Obviously you will not be running with optimal fuel & timing curves if you use a 1.6 ECU on an '01+ motor. Probably not a massive difference, though a few HP are being left on the table.

The NB alternator is also a problem, as it's controlled by the ECU. You can't just install the 1.6 alternator directly, as the pulley is different (V-belt vs. ribbed belt) though I've heard folks mention swapping pulleys. Never tried it, no idea if it works. If you can find a '94-'97 alternator, that'll bolt right in with no hassle at all.

Though in the end, I have to agree w/ rharris. Unless your 1.6 motor is dead or dying, sell the NB motor and use the money to turbo what you've got. Much better ROI.
Joe Perez is offline   Reply With Quote
Old 11-14-2009, 04:52 PM   #8
Junior Member
 
Join Date: Aug 2008
Location: MD/DE/PA
Posts: 337
Total Cats: 0
Default

Agree with what Mr. Perez said, I would only add that in any event, if considering an entire driveline swap and the undertaking of a massive project, stripping out the wiring harness, etc. Is likely a better solution in every possible way than hacking together pieces from several years of Miatae.
the_man 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
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 10-23-2016 08:58 AM
Noob to Miataturbo from MA JxPhan Meet and Greet 3 10-02-2015 03:17 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 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 08:46 PM.