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#1
08-08-2007, 12:48 PM
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ECUtune forged pistons for NA SVXii
I thought I'd start a new thread dedicated to the upcoming batch of forged pistons for naturally aspirated SVXii. There has been interest in and requests for forged pistons for naturally aspirated SVXii and we've got almost enough people who say they are ready to order to be able to get a batch made at an affordable price, $800 per set including rings and pins.
These pistons are geared for and will be optimized for naturally aspirated SVX's so there are some notable differences in the piston design from the ones we got made for forced induction. Most notably they will not have lateral gas porting so the rings will last longer and they will have a compression ratio in the range of 9.3 to 9.5. This compression ratio will work better with the poorer quality fuel they are selling these days and let us run mid grade and probably even regular unleaded. They will have deep valve recesses to maintain zero interference with the ECUtune camshafts. They will use japanese rings and be designed the correct size to allow a good hone of the cyllinders. I'll go collect up the names I have thus far for the head count on this batch and make another post to start the head count. I haven't done a good job of keeping track of people yet so if I forget you or count you and you weren't 100% ready and in please correct and repost the list. thanks
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Michael Emery, MBA, MS 94 SVX LSI, Ebony Pearl profile 94 SVX LSI, Ebony Pearl from back Performance and Multi-Fuel Tuning 
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#2
08-08-2007, 12:58 PM
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Ok, I know there are more but I couldn't find them so guys that I missed please add yourself and repost.
Headcount to date: Nickfu S. EarthWorm
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Michael Emery, MBA, MS 94 SVX LSI, Ebony Pearl profile 94 SVX LSI, Ebony Pearl from back Performance and Multi-Fuel Tuning
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#3
08-08-2007, 11:41 PM
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/subscribe
Is the lower compression ratio going to have any other noticeable effects or advantages? Disadvantages?
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. 
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#4
08-11-2007, 02:14 AM
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Mike why not up the compression ratio above standard then I would be interested. Matt had to shave the heads to increase his and that resulted in big problems for him. It would be better to do it with pistons.
Tony
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1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX. 1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC) 1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car. 1995 - SVX Green low k mint condiation. 1995 - SVX Rally car, ex Matts car. Now to be used on track. 1992 - SVX red & Black being converted to Mid Engine. 1995 - SVX Red 143,000 bit rough. Owned 5 others Subaru back to a 1974 1400 GSR.
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#5
08-11-2007, 06:00 AM
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It must be nice to live somewhere where the gasoline is good enough to consider increasing the compression ratio. The petroleum refiners and the environmental protection agency have been on a spree of reformulating the gasoline over here in the states. Each new formulation seems worse than the last. For street use we'll make more power with lower compression.
To run higher compression here you'd have to run race gas. If we can get together half a dozen people who want high compression pistons we can get a batch of those made too. Quote:
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Michael Emery, MBA, MS 94 SVX LSI, Ebony Pearl profile 94 SVX LSI, Ebony Pearl from back Performance and Multi-Fuel Tuning
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#6
08-11-2007, 02:30 PM
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Yeah, they don't offer premium fuel in Alaska so I won't be in for higher compression.
Octane booster are rising in price here too so lower comp would be paying for itself in the long run. (Very long run.. ) LAN, nobody is willing to install pistons (nobody I can trust), and it was difficult enough to even find someone to do the seals on my engine so I won't be installing these any time soon. I'll probably do it next year along with cams so time is no longer an issue.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute.
Last edited by NikFu S.; 08-11-2007 at 02:33 PM.
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#7
11-27-2007, 09:29 AM
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So...Bill add you to the list? Anybody else want in? I'm thinking of going ahead and putting a batch in.
Quote:
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Michael Emery, MBA, MS 94 SVX LSI, Ebony Pearl profile 94 SVX LSI, Ebony Pearl from back Performance and Multi-Fuel Tuning
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#8
11-27-2007, 10:54 AM
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Quote:
Replied to your PM. -Bill
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Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker
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#9
11-27-2007, 11:10 AM
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Maybe in a few years... I think the engine will be due for a rebuild around 150,000 miles, and about another year and a bit is probably when that is gonna happen...
~ Chris
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD **  1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love...
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#10
11-27-2007, 11:11 AM
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I'm going ahead and putting in a batch.
The more the merrier.... Feel free to add yourself to the list... Headcount to date: Nickfu S. EarthWorm Longassname SVXride
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Michael Emery, MBA, MS 94 SVX LSI, Ebony Pearl profile 94 SVX LSI, Ebony Pearl from back Performance and Multi-Fuel Tuning
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#11
11-28-2007, 12:28 AM
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Quote:
I've just gotten a project '92 SVX and have all sorts of questions, and have a project budget in mind of ~10k in the next 18 months to spend on building the car for Open Road Racing. Any and all help that I can get would be awesome, as I'm not well versed in SVX, or at least as much as I am in Forester information.
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'92 SVX LS-L Project Car for Open Road Racing
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