Dwell reducing circuit for Toyota COPs - 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:

LinkBack Thread Tools Search this Thread
Old 02-08-2014, 10:38 PM   #1
Junior Member
Thread Starter
Join Date: Jun 2011
Location: NSW Australia
Posts: 88
Total Cats: 2
Default Dwell reducing circuit for Toyota COPs

Just finished off this circuit using a 0.47Ω 100W resistor. Reduces the operating voltage down to about 8.5V which is about right for the 5.5ms dwell times of the 1.6 ECU.

To avoid frying the coils when the ignition is in the 'ON' position but the engine not running, a SPDT relay was used and tapped into the fuel pump relay. When the engine is cranked, it turns the circuit on.

I sourced the 12Vs from the main relay box. Only thing I'm unsure of is I built the circuit for 20amps which may not be sufficient after checking over my calcs again.

Those who are more electronic savvy than I am, mind chiming in your thoughts?
Attached Thumbnails
Dwell reducing circuit for Toyota COPs-cops-schematic.jpg   Dwell reducing circuit for Toyota COPs-photo-5.jpg   Dwell reducing circuit for Toyota COPs-photo-1.jpg   Dwell reducing circuit for Toyota COPs-photo-3.jpg  
spikes is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Toyota Pickup Engine Swap B.S. Monk Build Threads 24 12-11-2016 03:21 PM
Toyota COP Erat Miata parts for sale/trade 17 02-17-2016 05:22 PM
01-05 Fab9 PNP COPs (used) FrankB Miata parts for sale/trade 6 09-30-2015 12:48 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 03:39 AM.