CP Pistons - 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:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 04-25-2014, 07:43 PM   #1
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jan 2008
Location: Boston
Posts: 137
Total Cats: 0
Default CP Pistons

Anyone have an opinion on these vs. Supertech or Wiseco for a 300-350whp 1.8 build?
ihmcguinness is offline   Reply With Quote
Old 04-25-2014, 07:46 PM   #2
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,107
Total Cats: 48
Default

CP is a very reputable manufacturer. No personal experience but they are being used in some of the most powerful 4cyl engines around.
ctdrftna is offline   Reply With Quote
Old 04-25-2014, 08:14 PM   #3
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jan 2008
Location: Boston
Posts: 137
Total Cats: 0
Default

Any reason why they aren't so prevalent in the miata community, relative to the others I mentioned above?
ihmcguinness is offline   Reply With Quote
Old 04-25-2014, 08:49 PM   #4
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Supertech are cheap, dont have piston slap, and are more than strong enough for any reasonable miata build, thats why they're the most popular.
Leafy is offline   Reply With Quote
Old 04-25-2014, 09:22 PM   #5
Senior Member
iTrader: (1)
 
Join Date: Mar 2008
Location: Cromwell CT
Posts: 1,107
Total Cats: 48
Default

Yeah for low power street application go with the supertechs.
ctdrftna is offline   Reply With Quote
Old 04-25-2014, 09:25 PM   #6
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Quote:
Originally Posted by ctdrftna View Post
Yeah for low power street application go with the supertechs.
"Low power" I like how your definition of low power is like huge and massive to every other miata owner. Like **** how many 500hp miatas are out there with the BP engine in them? And you call it low power.
Leafy is offline   Reply With Quote
Old 04-25-2014, 09:27 PM   #7
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,196
Total Cats: 2,584
Default

600whp

"low power" bro'z
18psi is offline   Reply With Quote
Old 04-25-2014, 09:57 PM   #8
Senior Member
iTrader: (6)
 
Join Date: Jun 2010
Location: San Rafael, CA
Posts: 1,125
Total Cats: 41
Default

I hold CP pistons in the highest regards. I would not hesitate to run them in a Miata. The only downside I see is limited CR available.

Last edited by k24madness; 04-25-2014 at 10:18 PM.
k24madness is offline   Reply With Quote
Old 04-25-2014, 10:14 PM   #9
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,367
Total Cats: 1,332
Default

Quote:
Originally Posted by ctdrftna View Post
Yeah for low power street application go with the supertechs.
So anything under 500whp, then? Do you know what the strength difference is between a 2618 and a 4032 piston?
Savington is offline   Reply With Quote
Old 04-26-2014, 12:07 AM   #10
Junior Member
 
Join Date: Dec 2009
Location: Brisbane, AUSTRALIA
Posts: 486
Total Cats: 45
Default

The guy who built my engine LOVES the CPs.

When I mentioned that I was thinking about Wiseco pistons he suggested CPs instead since there's less work required to balance them (ie. they come pretty damn good straight out of the box).

Unfortunately the compression ratios are limited compared to Supertech's range.
Lokiel is offline   Reply With Quote
Old 04-26-2014, 12:17 AM   #11
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,196
Total Cats: 2,584
Default

Quote:
Originally Posted by Savington View Post
So anything under 500whp, then? Do you know what the strength difference is between a 2618 and a 4032 piston?
I know enough to pick 4032 each time
18psi is offline   Reply With Quote
Old 04-26-2014, 12:44 AM   #12
Senior Member
iTrader: (14)
 
Join Date: Oct 2006
Location: Las Cruces, NM
Posts: 1,404
Total Cats: 263
Default

I have CP pistons in my build. No issues.

99mx5 is offline   Reply With Quote
Old 04-26-2014, 01:12 AM   #13
Senior Member
iTrader: (6)
 
Join Date: Jun 2010
Location: San Rafael, CA
Posts: 1,125
Total Cats: 41
Default

Quote:
Originally Posted by Lokiel View Post
The guy who built my engine LOVES the CPs.

Unfortunately the compression ratios are limited compared to Supertech's range.
On my next motor build I would like to run some custom CP pistons. They are reasonable to work with for custom piston work. Since they have a 9:1 piston I would just modify the dome to fit my CR needs and verify the ring lands are set for the ring package I would want to run.

That being said it makes more $$$ sense to buy some Supertechs. They are more than strong enough for my needs and have great CR options. They are holding strong at my current 297whp.
k24madness is offline   Reply With Quote
Old 04-26-2014, 11:05 AM   #14
Senior Member
 
Join Date: May 2011
Location: Pennsylvania
Posts: 1,119
Total Cats: 33
Default

I put CP's in my mini when i melted a stocker 3 years ago. Absolutely no issues at all. Im only right around 300hp give or take, but everything has gone smooth from install, to break in, to daily driving. And the company is very easy to work with, i was sent the wrong pistons at first, but they fixed that issue with the quickness. lol
oh.... and they gave me lots of stickers.... stickers are good.... a company isnt **** without stickers... :P jk
supercooper is offline   Reply With Quote
Old 04-26-2014, 12:10 PM   #15
Elite Member
 
Join Date: Jul 2005
Posts: 6,454
Total Cats: 80
Default

How do these new pistons on the block compare wrt the supposed weak point of Supertechs?:
https://www.miataturbo.net/engine-pe...32/#post443437

JasonC SBB is offline   Reply With Quote
Old 04-27-2014, 09:40 PM   #16
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,680
Total Cats: 1,561
Default

Quote:
Originally Posted by JasonC SBB View Post
How do these new pistons on the block compare wrt the supposed weak point of Supertechs?:
https://www.miataturbo.net/engine-pe...32/#post443437

My engine builder ground down those narrow parts on my Supertechs between the valve reliefs and the edge of the pistons because they were an obvious hot spot otherwise.

So does Mazda on the factory pistons.
sixshooter is offline   Reply With Quote
Old 05-28-2014, 06:59 AM   #17
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,272
Total Cats: 32
Default

I'm rocking CP pistons here, do track events, no issues except it can be a bit noisy on cold startup as mentioned above. Because racecar.
timk is offline   Reply With Quote
Old 05-28-2014, 11:14 AM   #18
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

The answer is Supertech, but my JEs are dead quiet.
concealer404 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 Yesterday 09:00 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
NEW-Wiseco Piston, K1 Rods, Supertech Valves & Spring/Retainer, TB&C pedals Rudes333 Miata parts for sale/trade 17 11-05-2015 02:16 PM
WTB Stock NB Pistons pdexta WTB 0 09-28-2015 12:18 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 01:00 PM.