What engine did I just buy? - Miata Turbo Forum - Boost cars, acquire cats.

General Miata Chat A place to talk about anything Miata

What engine did I just buy?

Old 04-12-2018, 04:08 AM
  #1  
Newb
Thread Starter
 
Join Date: Apr 2018
Location: California
Posts: 5
Total Cats: 0
Default What engine did I just buy?

I'm a little confused on what I bought today. I decided to buy a project engine to rebuild and prep for a turbo build. I wanted another 1.6L Miata engine because I just prefer it over a 1.8L

Anyways, a friend of mine was selling his "JDM Miata Engine" whatever that means. $200 bucks and a drive across town later and it was mine. He bought it from an importer shop in Los Angeles. He thinks he recalls the guy telling him it was from a 1991 or 1992 Miata.

I looked at it more while at my house and I am not familiar with this engine at all. I tried to do some research but it's all over the place.

The valve cover has the recessed lettering of a 1.6 motor. The head has the casting B660 (From my research it's apparently a better flowing head?) The headers are a two piece tubular (Which I've heard that means 99-00 NB motor?) and the heat shield has BP5A casted into it.

The water neck is protruding forward like a 1.8 motor (unlike the 1.6 going upward) and the Cam Angle Sensor (typically on the back left side of the motor next to the coil pack) is not there. Instead there is a freeze plug. Also on the front of the valve cover there is a hole as if a sensor were to go there directly in front of the intake cam.

I can take some pictures tomorrow while there is light, but does anyone know anything about what this is?
tylerkun is offline  
Old 04-12-2018, 04:12 AM
  #2  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,052
Total Cats: 3,104
Default

Originally Posted by tylerkun View Post
I'm a little confused on what I bought today. I decided to buy a project engine to rebuild and prep for a turbo build. I wanted another 1.6L Miata engine because I just prefer it over a 1.8L

Anyways, a friend of mine was selling his "JDM Miata Engine" whatever that means. $200 bucks and a drive across town later and it was mine. He bought it from an importer shop in Los Angeles. He thinks he recalls the guy telling him it was from a 1991 or 1992 Miata.

I looked at it more while at my house and I am not familiar with this engine at all. I tried to do some research but it's all over the place.

The valve cover has the recessed lettering of a 1.6 motor. The head has the casting B660 (From my research it's apparently a better flowing head?) The headers are a two piece tubular (Which I've heard that means 99-00 NB motor?) and the heat shield has BP5A casted into it.

The water neck is protruding forward like a 1.8 motor (unlike the 1.6 going upward) and the Cam Angle Sensor (typically on the back left side of the motor next to the coil pack) is not there. Instead there is a freeze plug. Also on the front of the valve cover there is a hole as if a sensor were to go there directly in front of the intake cam.

I can take some pictures tomorrow while there is light, but does anyone know anything about what this is?
sounds like an nb6c

Stating here that you like 1.6 over 1.8 is one of the fastest ways to distinguish yourself as the village idiot lol
18psi is offline  
Old 04-12-2018, 04:29 AM
  #3  
Newb
Thread Starter
 
Join Date: Apr 2018
Location: California
Posts: 5
Total Cats: 0
Default

Originally Posted by 18psi View Post
sounds like an nb6c

Stating here that you like 1.6 over 1.8 is one of the fastest ways to distinguish yourself as the village idiot lol
Popular belief is definitely 1.8>1.6
I've never driven a turbo 1.6 or 1.8, but both N/A I always enjoyed my 1.6 more! It's possible the couple 1.8 variants I drove were just not well put together engines.. Plus I have so many spare 1.6L parts. I almost feel bad swapping to a 1.8 and not using anything I already have.

Back to the topic, the NB6C looks extremely similar. Do you happen to have any specific info or any links to something with more info? I got this motor for cheap and wasn't really looking for it. It just kind of happened. Is it even worth the time?
tylerkun is offline  
Old 04-12-2018, 05:51 AM
  #4  
Senior Member
iTrader: (1)
 
Join Date: Jan 2013
Location: Chandler, AZ
Posts: 905
Total Cats: 131
Default

Originally Posted by tylerkun View Post
Popular belief is definitely 1.8>1.6
I've never driven a turbo 1.6 or 1.8, but both N/A I always enjoyed my 1.6 more! It's possible the couple 1.8 variants I drove were just not well put together engines.. Plus I have so many spare 1.6L parts. I almost feel bad swapping to a 1.8 and not using anything I already have.

Back to the topic, the NB6C looks extremely similar. Do you happen to have any specific info or any links to something with more info? I got this motor for cheap and wasn't really looking for it. It just kind of happened. Is it even worth the time?
Replace "popular belief" with "cold hard fact".
Arca_ex is offline  
Old 04-12-2018, 05:57 AM
  #5  
Junior Member
 
Join Date: Jun 2015
Location: VIC, Australia
Posts: 127
Total Cats: 17
Default

When people say they prefer the 1.6 over the 1.8


If the freeze plug where the CAS should be is still on the intake side then it'll most likely be a NB6 engine. Not sure why you wouldn't want to swap in a 1.8 though. It's not popular belief that 1.8>1.6, it's fact.
Barton is offline  
Old 04-12-2018, 06:13 AM
  #6  
Newb
Thread Starter
 
Join Date: Apr 2018
Location: California
Posts: 5
Total Cats: 0
Default

I wouldnít be opposed to a 1.8 swap. Itís more, I bought this engine for $200. I also have tons of spare parts for a 1.6L. Itís just currently more apealing

Maybe iíll find someone with a 1.8 Miata that isnít crap to test drive. Apparently the HP bump and 200ccís is worth THAT much?

So far it seems this 1.6L I picked up isnít good for anything except a headache
tylerkun is offline  
Old 04-12-2018, 08:28 AM
  #7  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 9,704
Total Cats: 1,290
Default

NA, as in 1990-1997, motors are trash. Find someone with an NB to drive.

Also: this would be the first i would have heard that the NB 1.6 head castings are different.
concealer404 is offline  
Reply
Leave a poscat -1 Leave a negcat
Old 04-13-2018, 07:07 AM
  #8  
Junior Member
 
Dietcoke's Avatar
 
Join Date: May 2015
Location: Richmond Hill, GA
Posts: 153
Total Cats: -62
Default

Originally Posted by concealer404 View Post
NA, as in 1990-1997, motors are trash. Find someone with an NB to drive.

Also: this would be the first i would have heard that the NB 1.6 head castings are different.
To be fair, NB motors are dumpster fire trash too, along with every other 4cyl mazda has ever made. But I digress.
Dietcoke is offline  
Reply
Leave a poscat -7 Leave a negcat
Old 04-13-2018, 09:23 AM
  #9  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 9,704
Total Cats: 1,290
Default

Originally Posted by Dietcoke View Post
To be fair, NB motors are dumpster fire trash too,
Agree, but they don't burn with a ferocity enough that you can't get within 20 feet of them without acquiring 3rd degree burns. Just mild discomfort.

along with every other 4cyl mazda has ever made. But I digress.
Very disagree.
concealer404 is offline  
Old 04-13-2018, 03:55 PM
  #10  
Junior Member
 
Join Date: May 2017
Posts: 382
Total Cats: -37
Default

Originally Posted by Dietcoke View Post
To be fair, NB motors are dumpster fire trash too, along with every other 4cyl mazda has ever made. But I digress.
So why are you on a miata forum then?
andyfloyd is offline  
Old 04-13-2018, 04:53 PM
  #11  
Junior Member
 
Schroedinger's Avatar
 
Join Date: May 2016
Location: Atlanta
Posts: 478
Total Cats: 96
Default

To their credit, these B6 and BP motors are borderline indestructible as long as you run them as designed. Maybe more so for the long-nose B6. I generally don't see people under Miatas in the paddock, which I can't say for many other makes.

Right now I like the B6 better than the BP because the B6 is in my car doing what I ask it to, and the BP is in pieces all over my house, waiting for new expensive parts. That makes the B6 better.
Schroedinger is offline  
Old 04-13-2018, 07:01 PM
  #12  
Newb
Thread Starter
 
Join Date: Apr 2018
Location: California
Posts: 5
Total Cats: 0
Default

So essentially, every motor is trash and don't waste my time with any of them. Hell. Looks like I'm stuck.
tylerkun is offline  
Old 04-13-2018, 09:08 PM
  #13  
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,843
Total Cats: 254
Default

This forum has a lot of engine self loathing. I think its because nobody is trying to bullshit each other posting dubious dynos like every other make, so now Miata guys think every other engine is basically magic and the BP is a turd.

From what Ive experienced the BP is a great engine, very reliable if you keep the revs around stock.
Full_Tilt_Boogie is offline  
Old 04-13-2018, 10:27 PM
  #14  
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 75,028
Total Cats: 2,109
Default

revvy.
Braineack is offline  
Old 04-15-2018, 11:23 AM
  #15  
Junior Member
 
Join Date: Aug 2012
Posts: 460
Total Cats: 57
Default

Originally Posted by Arca_ex View Post
Replace "popular belief" with "cold hard fact".
You'd have an aneurysm near any UK forums then. They will defend "revvyness" to the death.
G3ML1NGZ is offline  
Old 04-18-2018, 10:45 PM
  #16  
Junior Member
 
Join Date: Nov 2016
Location: Richmond, VA
Posts: 140
Total Cats: 31
Default

Originally Posted by G3ML1NGZ View Post
You'd have an aneurysm near any UK forums then. They will defend "revvyness" to the death.
Yeah, but they also drive on the wrong side of the road, drink beer at room temp, and are incapable of the correct pronunciation of the word "aluminum."
themonkeyman is offline  
Old 04-18-2018, 11:59 PM
  #17  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,052
Total Cats: 3,104
Default

18psi is offline  
Old 04-19-2018, 02:37 AM
  #18  
Newb
Thread Starter
 
Join Date: Apr 2018
Location: California
Posts: 5
Total Cats: 0
Default

Originally Posted by themonkeyman View Post
Yeah, but they also drive on the wrong side of the road, drink beer at room temp, and are incapable of the correct pronunciation of the word "aluminum."
My laughs are too high.
tylerkun is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Philly Miata
General Miata Chat
7
02-17-2017 08:30 PM
LownSlow616
DIY Turbo Discussion
17
08-16-2016 01:38 PM
Cody Strife
Miata parts for sale/trade
1
02-24-2009 12:41 AM
elesjuan
DIY Turbo Discussion
5
12-20-2007 09:04 PM
Dlaitini
MEGAsquirt
14
11-01-2007 08:43 PM


Quick Reply: What engine did I just buy?


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.