F/I Blowing motors facts - Page 20 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FRS Justin · 12-19-2015, 12:14 PM

Tomei compared rods on the factory FA20 to the Factory FA20T and discovered the FA20T rods were a heavier design. Also the pistons were heavier design even tho they were 10.6 compared to the 12.5 FA20

http://dsportmag.com/the-tech/tomei-...a20-flat-four/

I guess Subaru engineers didn't feel safe pushing FA20 stock rods to even 268hp @6700rpm at the crank was safe.

zypher · 12-19-2015, 05:40 PM

Quote:

Originally Posted by FRS Justin

Tomei compared rods on the factory FA20 to the Factory FA20T and discovered the FA20T rods were a heavier design. Also the pistons were heavier design even tho they were 10.6 compared to the 12.5 FA20

[URL]http://dsportmag.com/the-tech/tomei-powered-dissects-the-fa20-flat-four/[/UR

I guess Subaru engineers didn't feel safe pushing FA20 stock rods to even 268hp @6700rpm at the crank was safe.

There is a huge difference between a manufacturers factor of safety and anything aftermarket. A manufacturer designs parts to meet a variety of goals, also OEM parts are expected to last far longer than anything aftemarket.

So increasing power for an OEM will mean a change to ensure parts last 250,000 + miles.

That being said reasonably increasing power will affect partlife but it will mean an engine lasts only 100,000 miles vs 250,000+

FRS Justin · 12-19-2015, 05:48 PM

Quote:

Originally Posted by zypher

There is a huge difference between a manufacturers factor of safety and anything aftermarket. A manufacturer designs parts to meet a variety of goals, also OEM parts are expected to last far longer than anything aftemarket.

So increasing power for an OEM will mean a change to ensure parts last 250,000 + miles.

That being said reasonably increasing power will affect partlife but it will mean an engine lasts only 100,000 miles vs 250,000+

I guess it boils down to what people expect it to last too, in when considering calling it safe. I do not believe 100k scenario will be
possible going f/I on a FA20, but that's just my opinion. But your statement has merit for sure..

EDIT

SkAsphalt · 12-21-2015, 11:55 AM

Quote:

Originally Posted by FRS Justin

I guess it boils down to what people expect it to last too, in when considering calling it safe. I do not believe 100k scenario will be
possible going f/I on a FA20, but that's just my opinion. But your statement has merit for sure..

EDIT

I guess you will not have too long to wait considering some people are over 100k with combined NA and turbo time

xkalelx · 12-21-2015, 11:57 AM

Jesus. This thread is still alive? Can it die now please? And get locked by an admin? And forgotten forever?

go_a_way1 · 12-21-2015, 12:07 PM

Quote:

Originally Posted by xkalelx

Jesus. This thread is still alive? Can it die now please? And get locked by an admin? And forgotten forever?

+100 to that

totopo · 12-21-2015, 03:12 PM

Quote:

Originally Posted by xkalelx

Jesus. This thread is still alive? Can it die now please? And get locked by an admin? And forgotten forever?

Quote:

Originally Posted by go_a_way1

+100 to that

If you want it to go away why do you keep necro-threading it? I think there was a lot if good information, and a lot of good discussion (other than people who keep trying to purposefully derail it). Why do you want it locked? II think it is valuable to people who are considering modding this (or any other) car. All I have seen from you 2 are snarky comments. If you don't have anything valuable to contribute, why don't you just stay quiet? Or why don't you give some comments of value? Why don't you directly and rationally respond to the last few comments by the OP? Is there anything there you can object to? if so why? and with what data?

Rabbit of Caerbonnog · 02-09-2016, 04:10 PM

So... have this been settled?

FRS Justin · 02-09-2016, 05:11 PM

Quote:

Originally Posted by Rabbit of Caerbonnog

So... have this been settled?

Depends who you ask....lol

AJPG · 02-09-2016, 05:16 PM

It's the tune.

Sent from my iPhone using Tapatalk

go_a_way1 · 02-09-2016, 06:16 PM

Oh god not this again.....

ThatCarGuyClayton · 02-10-2016, 01:35 AM

getting my popcorn...

ajc209 · 02-10-2016, 02:28 PM

I'll start. I did 3miles with 1000WHP so it must be safe. Anyone that blows an engine on less power must have had a bad tune.

Is that a good enough fact?

lukes Frs · 02-11-2016, 10:42 PM

OK so im new to the site looking for info on fi fa20 ? I just bought a new 2016 frs an I read this entire thread so my question is what is safe boost? or is any boost safe on this bottom end? I am only looking to make about 280whp enough to run with new ss ,or 5.0? but I don't wanna hurt a new car. so reply?

12-19-2015, 12:14 PM	#267
FRS Justin Senior Member Join Date: May 2014 Drives: 2013 Asphalt FRS Location: San Antonio Posts: 994 Thanks: 693 Thanked 695 Times in 417 Posts Mentioned: 22 Post(s) Tagged: 1 Thread(s)	Tomei Tomei compared rods on the factory FA20 to the Factory FA20T and discovered the FA20T rods were a heavier design. Also the pistons were heavier design even tho they were 10.6 compared to the 12.5 FA20 http://dsportmag.com/the-tech/tomei-...a20-flat-four/ I guess Subaru engineers didn't feel safe pushing FA20 stock rods to even 268hp @6700rpm at the crank was safe. __________________ Instagram FT86PROJECT9S Facebook FT86PROJECT9S 710whp Last edited by FRS Justin; 12-19-2015 at 01:02 PM.

02-09-2016, 04:10 PM	#274
Rabbit of Caerbonnog Run Away! Join Date: Sep 2014 Drives: 2015 Subaru BRZ Limited Location: Houston, TX Posts: 341 Thanks: 236 Thanked 358 Times in 159 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	So... have this been settled? __________________

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12-21-2015, 11:57 AM	#271
xkalelx Senior Member Join Date: Feb 2014 Drives: 2013 BRZ black Location: Cincinnati, OH Posts: 394 Thanks: 265 Thanked 284 Times in 113 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Jesus. This thread is still alive? Can it die now please? And get locked by an admin? And forgotten forever?

02-10-2016, 01:35 AM	#278
ThatCarGuyClayton Member Join Date: Dec 2015 Drives: N/A Location: Texas Posts: 36 Thanks: 31 Thanked 25 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	getting my popcorn...

02-10-2016, 02:28 PM	#279
ajc209 Senior Member Join Date: Dec 2011 Drives: GT86 Cosworth Location: UK Posts: 753 Thanks: 361 Thanked 270 Times in 188 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	I'll start. I did 3miles with 1000WHP so it must be safe. Anyone that blows an engine on less power must have had a bad tune. Is that a good enough fact?

02-11-2016, 10:42 PM	#280
lukes Frs Member Join Date: Feb 2016 Drives: 2016 Frs Location: alabama Posts: 14 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	OK so im new to the site looking for info on fi fa20 ? I just bought a new 2016 frs an I read this entire thread so my question is what is safe boost? or is any boost safe on this bottom end? I am only looking to make about 280whp enough to run with new ss ,or 5.0? but I don't wanna hurt a new car. so reply?

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