RX7Club.com - Mazda RX7 Forum

Haltech Forum Area is for discussing Haltechs

Throttle body when going standalone?

Thread Tools
 
Search this Thread
 
Old Jul 22, 2019 | 07:06 PM
Share
  #1  
CryoSignal's Avatar
CryoSignal
Thread Starter
Bankrupt rotary
Tenured Member 05 Years
iTrader: (1)
 
Joined: Jul 2018
Posts: 136
Likes: 14
From: South Carolina
Throttle body when going standalone?
I'm about to purchase a Haltech elite and harness for my 88 turbo. What do I delete on my TB before going full standalone? Also since I have an S4 my TPS is not full range, I've heard of people using old ford sensors on the OMP shaft. Does anybody have any advice on how they got a full range TPS? I'd really prefer to not buy a s5 TB.
Reply
0
Old Jul 22, 2019 | 08:52 PM
Share
  #2  
DC5Daniel's Avatar
DC5Daniel
Rotary Freak
Tenured Member 10 Years
iTrader: (10)
 
Joined: Jul 2012
Posts: 1,631
Likes: 89
From: Peachtree City, GA
There is nothing inherently "short range" about the S4 sensor itself, it is simply the cam which the sensor rides on. I got a cam from a donor S5 TB. Cheap, easy, elegant.
Reply
0
Old Jul 22, 2019 | 10:19 PM
Share
  #3  
CryoSignal's Avatar
CryoSignal
Thread Starter
Bankrupt rotary
Tenured Member 05 Years
iTrader: (1)
 
Joined: Jul 2018
Posts: 136
Likes: 14
From: South Carolina
Originally Posted by DC5Daniel
There is nothing inherently "short range" about the S4 sensor itself, it is simply the cam which the sensor rides on. I got a cam from a donor S5 TB. Cheap, easy, elegant.
I found this pdf on the forum with a replacement cam I can cut out of steel for the S4 throttle body that gives it full range. But aside from the TPS, what other mods do I need to make to the throttle body? Currently the lower coolant nipple on the TB is cracked off so the TB is bypassed. Would I need to remove the thermowax or the secondary throttle blades?
Attached Files
File Type: pdf
CAM hi-lo.PDF (21.8 KB, 130 views)
Reply
0
Old Jul 23, 2019 | 09:06 AM
Share
  #4  
j9fd3s's Avatar
j9fd3s
Moderator
Community Builder
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Mar 2001
Posts: 31,833
Likes: 3,232
From: https://www2.mazda.com/en/100th/
you can remove the thermowax, the throttle plates are mechanical, so you can leave them (make sure they open, most don't)
Reply
0
Old Jul 23, 2019 | 09:14 AM
Share
  #5  
CryoSignal's Avatar
CryoSignal
Thread Starter
Bankrupt rotary
Tenured Member 05 Years
iTrader: (1)
 
Joined: Jul 2018
Posts: 136
Likes: 14
From: South Carolina
Originally Posted by j9fd3s
you can remove the thermowax, the throttle plates are mechanical, so you can leave them (make sure they open, most don't)
Could the haltech use the BAC to bump the idle up to replace the themowax?
Reply
0
Old Jul 23, 2019 | 10:49 AM
Share
  #6  
j9fd3s's Avatar
j9fd3s
Moderator
Community Builder
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Mar 2001
Posts: 31,833
Likes: 3,232
From: https://www2.mazda.com/en/100th/
Originally Posted by CryoSignal
Could the haltech use the BAC to bump the idle up to replace the themowax?
yep! its the tidier way to do it, but you could leave the thermowax if you wanted
Reply
0
Old Jul 23, 2019 | 04:46 PM
Share
  #7  
peejay's Avatar
peejay
Old [Sch|F]ool
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: May 2001
Posts: 12,856
Likes: 568
From: Cleveland, Ohio, USA
You don't really need a TPS past one third throttle, this is kind of why Mazda did what they did.
Reply
0

Trending Topics

Old Jul 25, 2019 | 03:26 AM
Share
  #8  
C. Ludwig's Avatar
C. Ludwig
www.lms-efi.com
Tenured Member: 25 Years
Liked
Loved
iTrader: (27)
 
Joined: Mar 2001
Posts: 5,268
Likes: 147
From: Floyds Knobs. IN
Originally Posted by peejay
You don't really need a TPS past one third throttle, this is kind of why Mazda did what they did.
But, if the ECU see 30% throttle as 100%, as it will with the S4 arrangement, the TPS delta is completely screwed and you get wonky transient enrichment. The ECU wants to see a full sweep, linear sensor.
Reply
0
Old Aug 2, 2019 | 07:54 AM
Share
  #9  
SirCygnus's Avatar
SirCygnus
whats going on?
Tenured Member 20 Years
iTrader: (1)
 
Joined: Mar 2004
Posts: 4,930
Likes: 8
From: atlanta ga
the s5 unit has a full sweep as well as a short range tps
Reply
0
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Throttle body porting Question/ Throttle Body springs.. (PICS)
apexFD
2nd Generation Specific (1986-1992)
5
Oct 12, 2007 06:47 PM
tII throttle body elbow on N/A throttle body??? s4
88rxn/a
2nd Generation Specific (1986-1992)
5
Apr 19, 2006 06:31 AM
diferences between automatic throttle body and manual throttle body ?
V8kilr
2nd Generation Specific (1986-1992)
5
Apr 8, 2003 05:12 PM
Back to Subforum
Haltech Forum
View Next Unread
Engine cut




Advanced Search

All times are GMT -5. The time now is 09:29 PM.