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#421
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Re: Building a 10,000 rpm NA engine.
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Here's the good stuff: Jack's EG33 ran 100 mm pistons (aka EJ25 pistons) and we know how awesome that was - I think there is a built thread on here isn't there? Also on NASIOC. That EG33 in the UK runs a 3.75L setup based on the EJ25 bore and stroke .. it runs 8 second quarter miles, build info on 22B forum. Tony, would you believe some people stroke the EJ25 out to 2.7L!! Crazy talk. Last edited by bazza; 10-17-2012 at 01:29 AM. |
#422
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Re: Building a 10,000 rpm NA engine.
Wouldn't increasing the stroke work against the quest for higher revs?
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'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album |
#423
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Re: Building a 10,000 rpm NA engine.
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I think thats correct, we also don't know if our current cranks would have any issues yet. Seem to remember Rally Bob tell us some guy broke his crank. Can't remember the detail. Bob if your out there please jump in. 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. |
#424
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Re: Building a 10,000 rpm NA engine.
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Ron finished stroking the crank for 3.7lt. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#425
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Re: Building a 10,000 rpm NA engine.
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The large range of critical frequencies, that your crank will go through over a rev range of 0 to 10,000 rpm, will make it hard to find a clear spot, that a suitable harmonic balancer will handle. Spend too much time at the wrong frequency, and it will break. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#426
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Re: Building a 10,000 rpm NA engine.
Did he ever get it into an engine or the engine into a car? I was really interested in that project (was going to join in, but decided against it). Do you (or anyone else) have a way to get in touch with him to have him come talk about it?
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'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album |
#427
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Re: Building a 10,000 rpm NA engine.
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Harvey.
__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#428
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Re: Building a 10,000 rpm NA engine.
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However with Tony's 10,000 rpm engine I would stick to the 75mm setup initially and maybe look at the 79mm setup later. Nobody has pushed an EG33 to 10,000 rpm so there are a lot of unknowns that Tony's going to have to deal with. Quote:
LOL if it broke with only NA power that's just embarrassing for us as EG33 owners however I extremely doubt that is the case and it broke due to something else. Quote:
Now, you shouldn't resort to immature responses when losing an argument - it just makes you look like a fool. Last edited by bazza; 10-17-2012 at 04:59 PM. |
#429
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Re: Building a 10,000 rpm NA engine.
If there was a quality billet 79mm stroked EG33 crank using the 52mm journals...I'd be interested.
M |
#430
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Re: Building a 10,000 rpm NA engine.
It was Frank Aragona who had crank issues. He told me and Jack that the standard crankshaft was dead reliable until 9000 rpms. After 9500 he had breakage issues. He had a billet crank made, and spun his engine to 10,500 after that. Bear in mind he was drag racing only...no turns or heavy braking to deal with in terms of oil control.
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#431
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Re: Building a 10,000 rpm NA engine.
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__________________
'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album |
#432
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Re: Building a 10,000 rpm NA engine.
I don't know for sure. Frank was surprisingly open about some specs, and tight lipped about others. I know Web did his camshafts with "about" .550" lift, and TD machine did a bunch of the valve train parts. Remember he did this build 15 years ago or so.
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#433
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Re: Building a 10,000 rpm NA engine.
15 years ago? Probably not then. Thanks for the input.
__________________
'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album |
#434
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Re: Building a 10,000 rpm NA engine.
I undertstand Harvey's point about the harmonics of the crank but its also effect by load, as I recall that engine was developing around 1,100 hp.
Anyway the only way to prove if the crank can handle it or not is to run a engine to that revs. A question does the rev limiter on the SVX work, does it pull fuel or what? 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. |
#435
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Re: Building a 10,000 rpm NA engine.
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Your engine won't have that sort of HP. The crank will be affected more by the rpm that you want to run. The torque that the NA engine will develop, won't load the crank that much. The crank has handled the torque that using a blower or Nitrous has subjected it to in the past. The rpm limiter cuts fuel. Harvey.
__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
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