The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > MOD Mania > ECU Tune Projects

Reply
 
Thread Tools Rate Thread Display Modes
  #1  
Old 04-23-2007, 01:08 PM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
ECUtune SVX pistons

We've gotten in the first batch of custom SVX pistons so it's time to start this thread. This piston design is now established for us so we can offer them as individual sets. They will be made available on our website when I revise it for multitude of performance hardware options we are developing (pistons, cam sets, rods, transmissions, forced induction parts); except for the forced induction parts, the other performance parts allready have their own threads.

Price $1090 shipping $30 lead time 5 weeks

highlights:
compression ratio: 8.5
pins: tool steel
valve reliefs: -0.275"
anti detonation grooves

Description: These are forged pistons designed for use with either gasoline or E85 and boost levels up to and in the 30's psi range. They are machined from the strongest forgings possible with emphasis being placed on strength. Appropriate rings are included and optimum ring placement for the application was incorporated into the design. Latteral gas porting was incorporated to facilitate sealing of extreme cyllinder pressures. Tool steel pins were used for maximum strength. Pins are centered as this is better for higher cyllinder pressures. Piston tops are designed for optimum squish area performance, intake charge mix, charge to spark kernel pressentation, flame propagation, and expansion force application.

I'll follow this post with some pictures and some notes trying to illustrate the features.
Reply With Quote
  #2  
Old 04-23-2007, 01:40 PM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
Stack of the 1st seven sets. These are all spoken for not stock.


1 boxed set open


the boxes of rings and tool steel pins opened


bottom/inside of piston note the holes that allow the oil from the oil control rings to pass through--obviously much stronger than the factory slots which were prone to failure.


note the grooves for the Subaru Tru Arc pinston pin circlips
note the the oil dispersion grooves on the pin oilers



note the deep valve reliefs which maintain zero interference with high lift camsafts
note the symetry of the piston top
note the flat top matching the cyllinder head squish area




note the anti detonation grooves
note the deep ring placement
note the latteral gas porting on the top compression ring

Reply With Quote
  #3  
Old 04-23-2007, 01:43 PM
RSVX RSVX is offline
Network Design Administrator
 
Join Date: Feb 2002
Location: Boiling Springs, SC
Posts: 4,344
Note the sheer awesome-ness of this thread...
__________________
Chris
SVX World Network Administrator
-1993 Subaru SVX LS-L, Barcelona Red, #46, 160,000+ Miles (Sold to SomethingElse)
-2011 Toyota Sienna SE, Black, 30,000+ Miles (Swagger Wagon )
-2002 BMW R 1150R ABS, Black, 26,000+ Miles (Daily Driver )
SVX Owner from February 1997 to March 2008
SVX Online Community Member since February 1998
SVX World Network Member since February 2002, Member #520

Life is a game. Play to win.
The world belongs to those who can laugh at it.
Reply With Quote
  #4  
Old 04-23-2007, 02:00 PM
92svxinmn 92svxinmn is offline
Registered User
 
Join Date: Sep 2005
Location: st cloud, mn
Posts: 61
Do you know the weights of the pistons and the weight of the pins? are they lighter then stock? Cool but I'll have to wait for awhile on a set. Still machining deck insert to close the deck on my block.
Reply With Quote
  #5  
Old 04-23-2007, 02:13 PM
sicksubie's Avatar
sicksubie sicksubie is offline
Registered User
Subaru Bronze Contributor
 
Join Date: Nov 2004
Location: Holden, MA or the White Mountains
Posts: 3,812
Send a message via ICQ to sicksubie Send a message via AIM to sicksubie Send a message via Skype™ to sicksubie
Which box is mine, which box is mine??? Those are awesome. They can withstand up to 30psi you said, but what is the peak boost that we will safely be able to run on pump gas? I think you might have said what it was on the phone (15psi I think) but I am not sure.
__________________
Former:
1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2)
Current:
2017 Ford Raptor
2017 Kawasaki KLR
1995 Guards Red Carrera
1995 Spec-ish Miata - track car
1957 CJ-5
Reply With Quote
  #6  
Old 04-23-2007, 02:13 PM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
pistons are 419 grams. I think the pins are around 120 grams.

the forged piston complete with tool steel pin is about two ounces lighter than the factory piston and factory pin

Last edited by longassname; 04-23-2007 at 02:41 PM.
Reply With Quote
  #7  
Old 04-23-2007, 02:14 PM
sicksubie's Avatar
sicksubie sicksubie is offline
Registered User
Subaru Bronze Contributor
 
Join Date: Nov 2004
Location: Holden, MA or the White Mountains
Posts: 3,812
Send a message via ICQ to sicksubie Send a message via AIM to sicksubie Send a message via Skype™ to sicksubie
BTW any news on the rods? You said that you were going to match the pistons and rods into sets before you shipped them to me right?
__________________
Former:
1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2)
Current:
2017 Ford Raptor
2017 Kawasaki KLR
1995 Guards Red Carrera
1995 Spec-ish Miata - track car
1957 CJ-5
Reply With Quote
  #8  
Old 04-23-2007, 02:20 PM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
no news on the rods yet. I'm going to go ahead and ship the pistons out. I don't want to hold onto all these while I wait for the rods.
Reply With Quote
  #9  
Old 04-23-2007, 03:24 PM
mikecg's Avatar
mikecg mikecg is offline
Registered User
 
Join Date: Jul 2003
Location: Esconidido, CA
Posts: 2,422
Send a message via AIM to mikecg Send a message via Yahoo to mikecg
Mmmmmmm, yummy......
Reply With Quote
  #10  
Old 04-23-2007, 03:32 PM
Crazy_pilot's Avatar
Crazy_pilot Crazy_pilot is offline
Moar shifty!
Subaru Gold Contributor
 
Join Date: Nov 2006
Location: Toronto, Canada. Eh?
Posts: 4,560
Send a message via MSN to Crazy_pilot
Registered SVX
soooo nice and shiney...
__________________
Chris

92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping
2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos
2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold
2020 Ram 1500 Longhorn - Red Pearl

Reply With Quote
  #11  
Old 04-23-2007, 03:46 PM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,489
Registered SVX Classic SVX
looks like I will need to call that machine shop sooner than later eh?

tom
Reply With Quote
  #12  
Old 04-23-2007, 03:49 PM
jman050's Avatar
jman050 jman050 is offline
Its a Classic!
 
Join Date: Jul 2005
Location: tallahassee fl
Posts: 531
omfg i gotta start saving....these are way to shiny to resist
__________________
[SIGPIC][/SIGPIC]
STi BBS wheels,legacy gt 4.44, 3" catback exhaust, Stance GR+ 7k/5k, QS Teflon adjustable endlinks, Hankook EVO 245/40/17, 95-LS escaine seats, GC8 V7 steering wheel, JDM clear corners, small car clear lenses, Alcyone badge, JDM rear taillight, 97 grille, stevesby bumper, PWR radiator, Perrin Crank pulley, Urethane Swaybar bushings, urethane diff bushings, DDM 6k 55watt lows and 4500k 35watt fog lights; $15/15min mod, Motorsport whs 22mm rear swaybar, QC shift kit, ToMyx intake, z32 aluminum calipers 13" rotors, nitrous express proton + wet kit.
Reply With Quote
  #13  
Old 04-23-2007, 04:25 PM
SSSVX's Avatar
SSSVX SSSVX is offline
One teal and One yellow
 
Join Date: Aug 2001
Location: WV
Posts: 2,687
oh beautiful and shiny

looks like SVXi can withstand more boosts and be even faster...
__________________
-SSSVX

92 LS-L TEAL since Aug '01
92 LS-L YELLOW since Mar '05
Reply With Quote
  #14  
Old 04-23-2007, 07:02 PM
JaySVX's Avatar
JaySVX JaySVX is offline
Bad decisions effect everybody
 
Join Date: Mar 2007
Location: Collegeville, PA
Posts: 1,902
Send a message via AIM to JaySVX Send a message via Yahoo to JaySVX
Yet again, my wishlist grows even longer...

Congrats, very nice looking. What kind of abuse can stock rods take, as TomSVX i believe shattered his piston on his one car, not the rod. Could the rods take up to 15psi without worry, as long as the pistons can?
__________________
*No SVX at the moment...*
1987 Winnebago Elandan 35'
2001 Yamaha Roadstar 1600
2004 Ford Excursion Eddie Bauer, 6.0litre Power Stroke Diesel - Daily Driver.


Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well-preserved body, but rather to skid in sideways, scotch in one hand, body thoroughly used up, totally worn out and screaming HOOOOYA !!!!!
Reply With Quote
  #15  
Old 04-23-2007, 07:06 PM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,489
Registered SVX Classic SVX
I think the rods and bearing are good to at least 500 hp. Just don't **** it up

tom
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


All times are GMT -6. The time now is 12:38 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122