can i use a 1.8 throttle body with no issues? - Miata Turbo Forum - Boost cars, acquire cats.

Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > Engine Performance
Reload this Page >

can i use a 1.8 throttle body with no issues?

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

can i use a 1.8 throttle body with no issues?

Old 03-13-2010, 09:58 AM
  #1  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default can i use a 1.8 throttle body with no issues?

i'm swapping a 1.8 into my 93. i tried to install the throttle body adapter last night, and screwed it up.


will i have any issues if i just buy a 1.8 throttle body and use that?
DrewLGT is offline  
Old 03-13-2010, 12:09 PM
  #2  
Junior Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Murphy, Tx
Posts: 185
Total Cats: 6
Default

The issue is the TPS sensor, the 1.6 used an on/off tps while the 1.8 used a potentiometer. If you are using a 1.6 harness and ecu you need the on/off type tps. Either adapt the 1.6 tps to the 1.8 throttle body or switch to a 1.8 harness and ecu, or go with a megasquirt.
I've got my old 1.6 throttlebody and spacer I made lying around if you need one, it's not pretty but it worked.
Fidgitk is offline  
Old 03-13-2010, 12:42 PM
  #3  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

I have a braineack MS to install after the swap is done. Will the 1.6 tps bolt right onto the 1.8 throttle body?
DrewLGT is offline  
Old 03-13-2010, 12:50 PM
  #4  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Originally Posted by Fidgitk
I've got my old 1.6 throttlebody and spacer I made lying around if you need one, it's not pretty but it worked.


The problem I'm having with the TB spacer is that I drilled the holes in the intake mani, and when I tried to tap them I just wallered out the holes and dicked them up.

I don't really know what to do... Unfortunately I make up for my lack of mechanical skill most of the time by throwing money at my problems
DrewLGT is offline  
Old 03-13-2010, 12:53 PM
  #5  
Junior Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Murphy, Tx
Posts: 185
Total Cats: 6
Default

No you would need to figure out someway to adapt it.
Is the braineack MS setup for a 1.6 or a 1.8?
On the MSPNP the 1.6 tps isn't even used, I'm not sure if brain sets his up that way or not. You need to confirm with him what your MS needs to see as far as TPS signals. If it doesn't use a tps signal just install the 1.8 tb and leave the tps unplugged, if it does use a tps signal then install the 1.8 tb and get a 1.8 tps pigtail and wire it into your harness.
Fidgitk is offline  
Old 03-13-2010, 12:55 PM
  #6  
Junior Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Murphy, Tx
Posts: 185
Total Cats: 6
Default

On mine I ended up drilling the throttle body to match the 1.8 flange, I'm trying to remember why I made the spacer. I think it had to do with the idle valve.
Fidgitk is offline  
Old 03-13-2010, 02:04 PM
  #7  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Is there any reason why I couldn't weld the adapter to the intake manifold?
DrewLGT is offline  
Old 03-13-2010, 02:13 PM
  #8  
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,651
Total Cats: 111
Default

Skip the adapter and bolt up the 1.8 tbody. With the MS ECU, you actually don't need either the TPS or IAC valve--however if you locate the proper 1.8 connector pigtails, then you can go ahead and use them.
__________________
DIYAutoTune.com Tech Support
10AE-T|BEGi S4|MSPNP-Pro EMS|Enthuza Duals|6UL|Etc
Track Rat|2001|VVT|MS3-Pro EMS|Enthuza|Exocet in Progress

Originally Posted by concealer404 View Post
Buy an MSPNP Pro, you'll feel better.
Ben is offline  
Old 03-13-2010, 02:14 PM
  #9  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 28,117
Total Cats: 2,518
Default

Forget about the TPS. Just install the 1.8 TB directly with no modifications.

Your ECU can run without TPS for now. When you go MS, then worry about it.


Edit: Beaten to the point by 15 seconds...
Joe Perez is online now  
Old 03-13-2010, 02:42 PM
  #10  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Originally Posted by Joe Perez View Post
Forget about the TPS. Just install the 1.8 TB directly with no modifications.

Your ECU can run without TPS for now. When you go MS, then worry about it.


Edit: Beaten to the point by 15 seconds...
So I could install a 1.8 TB, start the car and make sure it runs on the stock ecu. Then install my MS with no issues?
DrewLGT is offline  
Old 03-13-2010, 02:46 PM
  #11  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 28,117
Total Cats: 2,518
Default

Yes.
Joe Perez is online now  
Old 03-13-2010, 03:08 PM
  #12  
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,651
Total Cats: 111
Default

It may not idle on the stock ECU with the throttle closed without a working TPS and idle valve. Open up the idle bypass screw and set for a high-ish idle.
__________________
DIYAutoTune.com Tech Support
10AE-T|BEGi S4|MSPNP-Pro EMS|Enthuza Duals|6UL|Etc
Track Rat|2001|VVT|MS3-Pro EMS|Enthuza|Exocet in Progress

Originally Posted by concealer404 View Post
Buy an MSPNP Pro, you'll feel better.
Ben is offline  
Old 03-13-2010, 05:28 PM
  #13  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 28,117
Total Cats: 2,518
Default

I tried it years ago when I had a stock ECU. There was a minor difference in idle stability, but it worked.
Joe Perez is online now  
Old 03-13-2010, 05:49 PM
  #14  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Originally Posted by Joe Perez View Post
I tried it years ago when I had a stock ECU. There was a minor difference in idle stability, but it worked.
so the car will start up and idle, will it drive?
DrewLGT is offline  
Old 10-16-2013, 10:10 PM
  #15  
Junior Member
 
Join Date: Oct 2010
Location: Tegelen, the Netherlands
Posts: 69
Total Cats: -8
Default

Hey guys, bumping an old thread in favor of making a new one.

I've done a '99/'00 swap into my '93 and am finishing it up tomorrow.
How doable is it to run (and drive) the car without TPS and Idle control valve?

I do have a FM adapter to bolt on my 1.6 tb, but I'd rather not.
Opgedronken is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
20
09-30-2018 02:09 PM
stoves
Suspension, Brakes, Drivetrain
5
04-21-2016 04:00 PM
tazswing
Race Prep
20
10-03-2015 12:04 PM
JxPhan
Meet and Greet
3
10-02-2015 03:17 AM
The Gleas
MEGAsquirt
3
10-01-2015 10:30 AM


Thread Tools
Search this Thread
Quick Reply: can i use a 1.8 throttle body with no issues?


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.