BRZ STI NA with more power - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

concept_cynic · 12-19-2011, 06:18 PM

Quote:

Originally Posted by Dimman

Funny how in the olden days tuning was exactly that, header, intake and exhaust sizing. Carbs too...

86mm stroke and 7500 rpm puts the mean piston speed ~4200 ft/min which is highish for 'stock' Toyota or Subaru rods, I think. 2JZ also had 86mm stroke and was limited to under 7k I believe.

But if they over-built the rods intending for more revs, who knows?

Yeah, it all comes down to how strong the bottom end of the engine is. The Honda k20 engine is an 86x86 engine too and people have spun those engines to 9k+ with cams and supporting valve train. Who knows....

tranzformer · 12-19-2011, 06:20 PM

Quote:

Originally Posted by concept_cynic

Yeah, it all comes down to how strong the bottom end of the engine is. The Honda k20 engine is an 86x86 engine too and people have spun those engines to 9k+ with cams and supporting valve train. Who knows....

Subaru engines aren't known for spinning like Honda engines.

Dimman · 12-19-2011, 06:29 PM

Quote:

Originally Posted by concept_cynic

Yeah, it all comes down to how strong the bottom end of the engine is. The Honda k20 engine is an 86x86 engine too and people have spun those engines to 9k+ with cams and supporting valve train. Who knows....

2JZ's can handle some more revs than their limit stock, too (nowhere near 9k though, lol). Not too sure about the Subaru motors for piston speed as they also tend to have a shorter stroke which is better for revs (less piston speed for same rpm).

Plus it's still a bit vague how much of a 'tuner' platform this is. Do they just mean the Scion dealer installed bolt-ons and it's built to a price point? Or did they over-build this thing like the old-days and it's reliable for 8.5k on factory rods/bearings as soon as it can breathe? (I can dream.)

Until some shop opens this one up and has a look at the rods, or blows one up on the dyno we can't really say.

So many unknowns... too much waiting for info, still...

ichitaka05 · 12-19-2011, 06:35 PM

Quote:

Originally Posted by tranzformer

Subaru engines aren't known for spinning like Honda engines.

I've seen STI redline lil pass 9k... but they did crazy mods on that STI

NemesisPrime909 · 12-19-2011, 07:09 PM

Quote:

Originally Posted by tranzformer

I would have to agree. While I might have enjoyed moding my car when I was younger, I'm at the point where I would prefer to have the car close to perfect from the factory (realizing certain aspects might need to be cut for a production car and to meet varied preferences of customers). If this car is as fun as it sounds like it will be, I have no problems leaving it stock. Fun to drive = fun to drive. That is what I care about most.

Dimman · 12-19-2011, 08:48 PM

Quote:

Originally Posted by ichitaka05

I've seen STI redline lil pass 9k... but they did crazy mods on that STI

What's the JDM STI go up to stock? Over 8k?

With the EJ20 motor's 75mm stroke, its mean piston speed at 8500 rpm is less than the FA20 motor at 7400 rpm. So probably less stress on the bottom end at higher revs (but pistons are bigger and maybe heavier so a little extra there).

ichitaka05 · 12-19-2011, 09:07 PM

Quote:

Originally Posted by Dimman

What's the JDM STI go up to stock? Over 8k?

With the EJ20 motor's 75mm stroke, its mean piston speed at 8500 rpm is less than the FA20 motor at 7400 rpm. So probably less stress on the bottom end at higher revs (but pistons are bigger and maybe heavier so a little extra there).

Yup, lil over 8k for JDM STI. JDM WRX iirc was around 7k

himbo · 12-20-2011, 11:12 PM

Anyone else interested in seeing car spin to 8k? I wonder if that's something some tuners will do...

WingsofWar · 12-20-2011, 11:44 PM

If this car can free rev to 7.5k id love to see this car make power up to 9k.

I dont think iv felt anything so beautiful when i ran a rx8 to 9k or a CTR to 9k.

The only other car i want to drive reving high other than the BRZ/86, is a Mines R34 GTR (i think redline is like 10.5-11k.

ahausheer · 12-21-2011, 01:41 AM

So it's Tuesday evening (California). Any news on the STI?

ahausheer · 12-21-2011, 11:21 AM

Ifawishes: I was referring to the opening statement in the thread (see monday or tues):

BRZ STI NA with more power
i just got a new information today about the BRZ STI -
no turbo! - it will be the same FA engine but with more power -
hopefully with some more engine displacement.

i will get more news about engine,suspension,brakes and more monday or tuesday...

aesthetect · 12-21-2011, 11:44 AM

+1, wheres the beef

tranzformer · 12-21-2011, 06:16 PM

Harinjo, the OP, was last active ~45min ago. Hopefully they have followed this thread since starting it and will give an update one way or another.

Dimman · 12-21-2011, 06:29 PM

Quote:

Originally Posted by tranzformer

Harinjo, the OP, was last active ~45min ago. Hopefully they have followed this thread since starting it and will give an update one way or another.

Meh... he was telling everyone TURBO! a while ago...

12-20-2011, 11:44 PM	#65
WingsofWar MODERATOR-SAMA Join Date: Oct 2009 Drives: Swagtron Scooter Location: Seattle Posts: 2,685 Thanks: 345 Thanked 1,561 Times in 524 Posts Mentioned: 81 Post(s) Tagged: 0 Thread(s)	If this car can free rev to 7.5k id love to see this car make power up to 9k. I dont think iv felt anything so beautiful when i ran a rx8 to 9k or a CTR to 9k. The only other car i want to drive reving high other than the BRZ/86, is a Mines R34 GTR (i think redline is like 10.5-11k. __________________

12-21-2011, 01:41 AM	#66
ahausheer Re-member Join Date: Nov 2011 Drives: Toyota camry Location: S. Cali Posts: 1,001 Thanks: 98 Thanked 292 Times in 152 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	So it's Tuesday evening (California). Any news on the STI? __________________ Nothing decays like progress, and nothing preserves like neglect.

12-21-2011, 11:21 AM	#67
ahausheer Re-member Join Date: Nov 2011 Drives: Toyota camry Location: S. Cali Posts: 1,001 Thanks: 98 Thanked 292 Times in 152 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Ifawishes: I was referring to the opening statement in the thread (see monday or tues): BRZ STI NA with more power i just got a new information today about the BRZ STI - no turbo! - it will be the same FA engine but with more power - hopefully with some more engine displacement. i will get more news about engine,suspension,brakes and more monday or tuesday... __________________ Nothing decays like progress, and nothing preserves like neglect.

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12-20-2011, 11:12 PM	#64
himbo Senior Member Join Date: Mar 2010 Drives: Lightening Red BRZ Ltd. Location: North Jersey Mutha Luva!!! Posts: 226 Thanks: 67 Thanked 94 Times in 44 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Anyone else interested in seeing car spin to 8k? I wonder if that's something some tuners will do...

12-21-2011, 11:44 AM	#68
aesthetect form follows function Join Date: Dec 2011 Drives: 240Z, E90 M3, tacorunner Location: alabama Posts: 50 Thanks: 1 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	+1, wheres the beef

12-21-2011, 06:16 PM	#69
tranzformer Delights in pure handling Join Date: Apr 2011 Drives: Zoom Zoom Location: KS Posts: 4,854 Thanks: 0 Thanked 15 Times in 14 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Harinjo, the OP, was last active ~45min ago. Hopefully they have followed this thread since starting it and will give an update one way or another.

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