Are COPs worth it? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to   Members

General Miata Chat A place to talk about anything Miata

LinkBack Thread Tools
Old 01-14-2012, 06:18 AM   #1
Elite Member
Thread Starter
iTrader: (6)
blaen99's Avatar
Join Date: Sep 2010
Location: Seattle, WA
Posts: 4,112
Total Cats: 27
Default Are COPs worth it?


Thanks to you guys highly enthusiastic praises about a COP conversion, I am just about to pull the trigger on COPs. But, are COPs worth it or not?

Unfortunately, I just ran across this and it has both FM and DIYAutotune being pretty harsh on them, stating pretty clearly just to go with the LSx coils and that COPs at best are a very minor upgrade to our stock coils.

P.S. Link also has a "shout out" to!
P.P.S. I really, really want COPs - but if COPs are only a tiny bit better than stock coils, there are better things I can spend my money on. It's either COPs or stock coils with me - I own rotaries, I've experienced messing around with coil packs and flat out refuse to do it on the Miata.

Last edited by blaen99; 01-14-2012 at 06:43 AM.
blaen99 is offline   Reply With Quote
Old 01-14-2012, 06:52 AM   #2
Supporting Vendor
iTrader: (31)
Savington's Avatar
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,357
Total Cats: 1,322

Saying that the Toyota coils are "not necessarily an upgrade" is ridiculous IMO. There's plenty of empirical data showing that you can run more boost and more gap with Toyota coils than you can with factory coils. I was down to .022" gaps at 13psi and 200whp on stock coils - after switching to Toyota coils I would run .035 or .040" gaps, all the way up to 21+psi and 300+whp. Now I'm running the same coil setup and .035" gaps at 17psi and 350whp, and they still haven't hiccuped once (aside from accidentally blowing out a couple of the coils from running ~7ms of dwell after I switched from the MSPNP to my current AEM box).

The LSx coils are definitely better, and I'm sure DIYAutotune's pencil coils are better as well, but saying that the Toyota coils aren't an upgrade from stock is just not true.

Ask Hustler, he raved about his set when he first got them.
Savington is offline   Reply With Quote
Old 01-14-2012, 06:53 AM   #3
Elite Member
Thread Starter
iTrader: (6)
blaen99's Avatar
Join Date: Sep 2010
Location: Seattle, WA
Posts: 4,112
Total Cats: 27

Thank you very much for the info, Sav!
blaen99 is offline   Reply With Quote
Old 01-14-2012, 05:06 PM   #4
iTrader: (24)
shuiend's Avatar
Join Date: May 2006
Location: Charleston SC
Posts: 13,775
Total Cats: 1,106

Do the LS2 coils, it comes out to be a little cheaper I have found. I will post more details about the swap later tonight.
shuiend is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
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
using 2002 ECU on 1990 Miata btabor ECUs and Tuning 12 09-14-2015 04:45 PM
Noob from Fort Worth, Texas checking in. Miatabro Meet and Greet 7 09-11-2015 01:13 PM

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 02:53 AM.