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#31
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Re: Race engine for my race svx.
Here are the nippon custom rings to match the pistons:
And here is the core engine being used. It is an extremely low miles 96 lsi motor which has been in storage for 8 years: |
#32
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Re: Race engine for my race svx.
Ooooo, this thread is starting to look fun
~ Chris
__________________
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... |
#33
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Re: Race engine for my race svx.
Quote:
Sorry, misstatement on my part. What I meant to ask is how you feel the flow properties within the combustion chamber will be changing since you're drastically changing the dome shape (not squish area) of the pistons going to the higher compression ratio. -Bill
__________________
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 |
#34
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Re: Race engine for my race svx.
I think they will be good? I'm not sure what you are looking for for an answer here. There's a clear path for the turbulence from the squish area to shoot into the combustion chamber and deflect off of the valve recesses. I also did my best to eliminate any hot spots.
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#35
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Re: Race engine for my race svx.
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Yeah, that's about it. I was curious as to your thoughts on the 11:1 pistons versus stock/9.3:1 since the 11:1 have totally lost the flat "plateau" in the middle of the dome. Thanks for the answer. -Bill
__________________
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 |
#36
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Re: Race engine for my race svx.
Its looking good Michael, can't wait to drop that baby in the car.
Tony
__________________
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. |
#37
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Re: Race engine for my race svx.
yes +1 for this
__________________
-SSSVX 92 LS-L TEAL since Aug '01 92 LS-L YELLOW since Mar '05 |
#38
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Re: Race engine for my race svx.
Boring and honing are done. Porting is done as well. I'll take some pictures of the porting tomorrow when I crate the heads up to send off for thermal barrier coating.
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#39
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Re: Race engine for my race svx.
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#40
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Re: Race engine for my race svx.
Nice! Are you sticking with stock valves?
-Bill
__________________
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 |
#41
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Re: Race engine for my race svx.
The parts I use, the piston sidewall clearances, the ring end clearances, the oil clearances, even the porting I do varies with the application the engine is being sculpted to perform best in. This is a high rpm naturally aspirated engine being built for long, touring courses. Heavier, longer valves would be going in the wrong direction.
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#42
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Re: Race engine for my race svx.
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The progress looks great . Can't wait to see the results.
__________________
Tim 92 Liquid Silver SVX 5MT 2009 BMW Z4 (Gone) 2012 Camry V6 SE |
#43
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Re: Race engine for my race svx.
That whole cavitation in the cooling system at high rpms is just an idea someone posited, not a fact. Slowing down coolant flow for engines that operate at high rpm in order to give it enough time in the radiator to cool down is helpful in a lot of cars. In the SVX's case, however, it looks more likely to that the cooling system simply can't keep up with the demand of extended high rpm operation with only one fan running and, or the fan kicking in only after the coolant is already very hot. I believe that with both fans running the oe cooling system will perform well in extended high rpm operation. Anthony has done some testing which seems to indicate this is correct. This is something he is geared up for and ready to monitor in case further modification of the cooling system is necessary. The thermal barrier coatings I am using on the pistons, heads, and valves of course dramatically reduce the burden on the cooling system as well.
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#44
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Re: Race engine for my race svx.
Alright... I'm thinking about selling my computer that I finished building a short while ago to fund a re-build of my engine... I'm gonna have to keep this in my mind and I'll get with ya LAN about getting something together for me... I am very interested in a NA build that would be good and reliable for around 300+ crank hp with alittle room to spare and great reliability...
~ Chris
__________________
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... |
#45
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Re: Race engine for my race svx.
The thermal barrier coatings are done and the heads and valves are on their way back to me now. I'm going machine the step deck in the next few days so expect pictures of eg33 block halves bolted to a Spindle Wizard CNC vertical machining center with an Iscar facemill a spinnin and chips a flyin.
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