Welcome to the North American Subaru Impreza Owners Club Saturday August 1, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Built Motor Discussion

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
View Poll Results: best daily driver forged pistons?
arias 0 0%
CP 16 29.63%
Cobb 2 3.70%
Cosworth 5 9.26%
JE 3 5.56%
Mahle 2816's 4 7.41%
Mahle 4032's 5 9.26%
Ross 1 1.85%
TWE 1 1.85%
Wiseco 17 31.48%
Voters: 54. You may not vote on this poll

Reply
 
Thread Tools Display Modes
Old 07-02-2008, 03:42 PM   #1
sick1.8t
Scooby Specialist
 
Member#: 22345
Join Date: Aug 2002
Chapter/Region: NESIC
Location: Boston
Vehicle:
2003 RSX
black

Default Best daily driver pistons? (1st hand opinions preferred)

i searched around and didnt see much in the way of a poll, so here it is:

for the people that care about things such as low pistons noise and daily driving there car, what forged pistons do you prefer?

my personal setup is a hybrid with a 400whp goal (still need pistons), but since 1st hand opinions (not internet rumors) are preferred this is open to all setups.
* Registered users of the site do not see these ads.
sick1.8t is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-02-2008, 03:44 PM   #2
sick1.8t
Scooby Specialist
 
Member#: 22345
Join Date: Aug 2002
Chapter/Region: NESIC
Location: Boston
Vehicle:
2003 RSX
black

Default

i may have missed some options in there, i mostly just copied whats in the piston FAQ, feel free to point out other options that are preferred and why.
thanks.
sick1.8t is offline   Reply With Quote
Old 07-02-2008, 04:34 PM   #3
mick_the_ginge
Citizen Mick
 
Member#: 27646
Join Date: Oct 2002
Chapter/Region: NWIC
Location: Portland, Oregon
Vehicle:
2003 Sleeved 2.5
Oil Dry Sump Goodness

Default

I used to daily drive my car and my CP's were not that noisey which is why I voted for CP (first hand experience)
mick_the_ginge is offline   Reply With Quote
Old 07-02-2008, 04:43 PM   #4
kellygnsd
Scooby Guru
 
Member#: 32669
Join Date: Feb 2003
Chapter/Region: SCIC
Location: San Pedro
Vehicle:
2007 2.34LR, EFR7670
LINK G4 hybrid STi

Default

I've had Wiseco's in my engine twice and the noise isn't all that bad. I couldn't tell you the piston-wall clearance but I do know each bore was matched to each piston. The P/W clearance has more to do with cold start-up and warm noise than the piston brand itself to an extent.

I can tell you most responses you get on a subject like this are going to be biased towards whatever piston the poster happens to have in there car at the time. Different builders use different P/W clearances which leads to different people complaining about how noisy brand X pistons are while at the same time the other half brag about how quiet their forged motor is with brand X pistons.

Unless you plan on building the engine yourself I recommend going with the pistons your engine builder recommends.
kellygnsd is offline   Reply With Quote
Old 07-02-2008, 04:44 PM   #5
mxpunk
Scooby Specialist
 
Member#: 132130
Join Date: Nov 2006
Chapter/Region: TXIC
Location: Austin, Texas
Vehicle:
2002 Ford F-150
Graphite Gray

Default

cant you make 400whp reliabily on stock pistons?
mxpunk is offline   Reply With Quote
Old 07-02-2008, 05:36 PM   #6
stu
Scooby Specialist
 
Member#: 25768
Join Date: Oct 2002
Chapter/Region: RMIC
Location: CO springs
Vehicle:
35R bugeye
Slowbaru

Default

^^^^^^some can^^^^^^. but I wouldn't rely on the stockers for very long. I have had a few sets of pistons and like the higher compression pistons for daily driving weisco are 8.9 to 1 I always seem to have power.
stu is offline   Reply With Quote
Old 07-03-2008, 03:54 AM   #7
sick1.8t
Scooby Specialist
 
Member#: 22345
Join Date: Aug 2002
Chapter/Region: NESIC
Location: Boston
Vehicle:
2003 RSX
black

Default

i'll be running the stock headgasket so my CR will be somewhat high, mid 8's:1.

noise isnt the only factor i'm looking at, but i've just noticed some quotes from engine builders like 'i avoid XXX brand like the plague' (and it was the brand i was leaning towards).
so general opinions on which DD pistons people prefer is good.

thanks for whats been posted so far
sick1.8t is offline   Reply With Quote
Old 07-03-2008, 08:05 AM   #8
MJU1983
Scooby Specialist
 
Member#: 14364
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: Saint Louis, MO
Vehicle:
2003 WRX, '06 Armada
05 Vette & 05 STi (sold)

Default

I have Ross pistons in my engine - coated skirts and tops. They aren't that noisy at all, the case is closed deck & sleeved. The same applies for CP's from first hand experience.
MJU1983 is offline   Reply With Quote
Old 07-03-2008, 11:42 AM   #9
flycaster
Scooby Specialist
 
Member#: 60142
Join Date: Apr 2004
Location: Bend, OR
Vehicle:
2011 WRX
Grey

Default

I've been using a set of custom JE's for about 27K miles, right at that power level. They work fine, but I can't say they are any better (or worse) than CP's or anything else.
flycaster is offline   Reply With Quote
Old 07-03-2008, 12:11 PM   #10
dug-e-fresh
Scooby Guru
 
Member#: 4568
Join Date: Mar 2001
Location: 603 whp / EJ207
Vehicle:
10.7 @ 136, '02 WRX
13.4 @ 103, '09 spec.B

Default

10,000 miles plus on my coated 92.5mm CP pistons. NO NOISE AT ALL.

Making enough power to trap 130+ hitting fuel cut, spinning through 1st with high 10/low 11 a/f ratios.

def
dug-e-fresh is offline   Reply With Quote
Old 07-03-2008, 03:29 PM   #11
Element Tuning
Former Vendor
 
Member#: 54918
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Gaithersburg, MD
Vehicle:
673 WHP Element
Tuning Pro Comp Engine

Default

The piston has very little to do with the topic, it's all about the build. I've hear many complain about how loud CP pistons are but we use them and they are really quiet. The life of the motor has more to do with the ring type and the ring end gaps used. We see the most wear in the rings and typically reuse the same pistons over and over again in our race car with just a new set of rings and a hone. Under racing conditions you can really wear that top ring out but can still get useful life out of them for about 25-30K miles. A street car could go much longer and you could go longer even with a race setup but the top ring gap grows and grows so you loose some power and have more blow-by.

Thanks,
Phil
www.elementtuning.com
Element Tuning is offline   Reply With Quote
Old 07-03-2008, 03:47 PM   #12
sick1.8t
Scooby Specialist
 
Member#: 22345
Join Date: Aug 2002
Chapter/Region: NESIC
Location: Boston
Vehicle:
2003 RSX
black

Default

thanks phil, and everyone else.

i guess i'm just curious what pistons people stand by for daily drivers and which ones people always avoid. it seems that alot of people are very opinionated on what they think is the only piston to use and which ones are always junk. i can see that a bad build/tune can ruin everything though.
sick1.8t is offline   Reply With Quote
Old 07-03-2008, 04:24 PM   #13
flycaster
Scooby Specialist
 
Member#: 60142
Join Date: Apr 2004
Location: Bend, OR
Vehicle:
2011 WRX
Grey

Default

Quote:
Originally Posted by Element Tuning View Post
...The life of the motor has more to do with the ring type and the ring end gaps used...the top ring gap grows and grows so you loose some power and have more blow-by.
That's good information, Phil, and doesn't surprise me that much. In shifter karts, we generally get about 3-4 hours out of a ring before compression drops unacceptably - just re-ring, hit the cylinder with a few quick rubs of WD-40 and a Scotchbrite pad, good to go. The pistons stay in spec for about 6-10 hours, so I'd guess it's about 2-3:1.

Too bad it isn't quite as easy to re-ring a Subaru as it is a shifter - the last time I had to do this track-side: took about 1/2 an hour.
flycaster is offline   Reply With Quote
Old 07-04-2008, 07:33 PM   #14
HighSpeedLowDrag
Scooby Newbie
 
Member#: 59871
Join Date: Apr 2004
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
2004 STi - Silver
FPGreen,FMIC,Wisecos,MSPT

Default

I can't comment on what is the best, but can relay my daily driving experience so far with Wiseco pistons in an otherwise stock long block. The pistons are pretty noisy on cold start up, but once the engine is warmed up it's no louder than stock. I've noticed a big improvement in around-town driveability, although a bunch of other mods were done at the same time, so I can't say for sure it is due solely to the pistons. FWIW, I let my tuner select the pistons, as other posters have suggested.
HighSpeedLowDrag is offline   Reply With Quote
Old 07-04-2008, 08:28 PM   #15
Eskram
Scooby Newbie
 
Member#: 16697
Join Date: Mar 2002
Chapter/Region: South East
Vehicle:
2004 2.5 Hybrid 18g
Wagon + LGT 1-4 g00dness!

Default

I have about 25k daily driven miles on my motor since the rebuild and I've had zero issues with the motor (trans is starting to go ). The motor is still pretty quiet too - ALMOST stock-like. There's a tiny bit of noise on a cold start, but it goes away after a few seconds. I burn about 1qt every 3k miles, running Rotella T 15w40 dino. I am NOT nice to my car, it sees 20psi and high RPMs often, so I expect to burn a bit of oil, but otherwise the setup has been very solid.

The motor is a EJ257 hybrid with 8.2:1 CP pistons, stock crank/rods, stock 2004 WRX heads.
Eskram is offline   Reply With Quote
Old 07-05-2008, 06:00 AM   #16
bugeyes
Scooby Specialist
 
Member#: 64494
Join Date: Jun 2004
Location: Australia
Vehicle:
2001 V7 sti

Default

Used CP's in my last motor and in my new sleeved EJ257 I've gone back and bought them again.
Excellent product , very quiet if bore size is finished correctly.
Oil comsumption is zero, I regularly check and the level doesnt change. I do not top up at all between services.

A big thumbs up from me.
bugeyes is offline   Reply With Quote
Old 07-05-2008, 09:34 PM   #17
icslowmo
Scooby Newbie
 
Member#: 114667
Join Date: May 2006
Chapter/Region: SWIC
Location: Peoria, AZ
Vehicle:
00/5 Silver STi RS
FAT 40R kit w/ FMIC

Default

I'm interested in this one as well

Bumb..
icslowmo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2.5i, daily driver, recommended 1st mods? chokingvictim Brakes, Steering & Suspension 4 09-02-2007 02:47 AM
best daily driver entry level coilover tmeultraman Brakes, Steering & Suspension 26 11-09-2006 08:32 AM
Best daily driver brakes? Douginss Brakes, Steering & Suspension 15 08-31-2005 01:36 PM
Best Daily Driver spring for STI? thorondor Brakes, Steering & Suspension 34 05-08-2005 01:52 AM
Best Daily Driver Strut/Spring Affordable Combo? RacerinLSL Brakes, Steering & Suspension 6 06-06-2001 12:42 AM


All times are GMT -4. The time now is 06:25 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.