Boost Issues on Stock Internals - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mcrane · 02-12-2017, 10:44 AM

Hey Guys,

I am venturing into the world of forced induction with my 86 (stock internals). Was hoping some of you could clear a few things up. I understand that boosting any car comes with more maintenance and better diligence. I will be upgrading the Clutch and Flywheel to a Stage 2. The vehicle will be used for daily driving and the occasional autocross. These questions are more directed toward the engine.

- Since the FA20 is high compression, wouldn't boost just increase heat and cause the stock internals to wear faster?

- I am aiming on 7 PSI. Is anyone running similar boost levels? If so, how many miles have you gone and have you had any major issues?

I guess the overall question is "how reliable is the stock FA20 at around 7-8 psi?"

- Thanks!

FirestormFlex · 02-12-2017, 03:07 PM

It's been shown to be quite reliable at reasonable power levels, especially if running E85 for fuel. But the problem in my experience is, 8psi gets boring and you very quickly want more.

Summerwolf · 02-12-2017, 03:16 PM

Save up money for a built block or spare engine! Do some research on the topic and you will find engines lasting seemingly forever and some that let go almost immediately. Tuning is a huge issue, but sometimes when everything is right the motor still goes. All depends!

mcrane · 02-12-2017, 03:27 PM

Very true. Best not to even start. That way I don't get addicted to boost haha

mcrane · 02-12-2017, 03:28 PM

Quote:

Originally Posted by Summerwolf

Save up money for a built block or spare engine! Do some research on the topic and you will find engines lasting seemingly forever and some that let go almost immediately. Tuning is a huge issue, but sometimes when everything is right the motor still goes. All depends!

Been there, done that. I have always felt that Forced Induction was a gamble. That comes from experience....

kmbkk · 02-12-2017, 03:34 PM

I have almost 55k miles on my turbo kit. I haven't had any issues with it, other than needing to replace the clutch. And I didn't even do that until 45k miles. I daily drive my car,a and have only tracked it once. I usually leave it at 8psi, but occasionally bump it to 12psi if I want to have a little fun. I have a flex fuel that I'll install in a month or 2 to have even more fun. Hope that helps.

Summerwolf · 02-12-2017, 03:50 PM

Quote:

Originally Posted by mcrane

Been there, done that. I have always felt that Forced Induction was a gamble. That comes from experience....

Well then why even ask the question with your experience, lol.

mcrane · 02-12-2017, 09:02 PM

Quote:

Originally Posted by Summerwolf

Well then why even ask the question with your experience, lol.

Because...clearly it wasn't good experience haha

Summerwolf · 02-12-2017, 11:17 PM

Quote:

Originally Posted by mcrane

Because...clearly it wasn't good experience haha

This one won't be either.

Apoc · 02-12-2017, 11:38 PM

Do not my friends, become addicted to boost. It will take hold of you, and you will resent it's absence.

BRZoomTX · 02-13-2017, 02:24 PM

My stock '13 motor lasted 3000 miles of daily abuse at 470hp (19psi w/ 5558). With how hard I beat on the car, I'm surprised it didn't blow up sooner.

Keep the car around 10psi with e85 (flex fuel), and it should last you a long time.

Freddy@PTUNING · 02-14-2017, 10:19 AM

We have customers on our turbo kit with over 30k miles, daily driven with some track time. Pump gas and E85, still on the stock motor.

pgranberg11 · 02-14-2017, 10:54 AM

i usually run around 10-12 psi depending on weather with flexfuel as well. Been to several track events, only thing was clutch needed to be replaced, and the PSA of clamping your evap line otherwise it will pop off under boost. probably have over 10k miles boosted

8RZ · 02-14-2017, 11:14 AM

#YOLO

02-12-2017, 10:44 AM	#1
mcrane Member Join Date: Nov 2015 Drives: 2013 Scion FR-S Location: MA Posts: 78 Thanks: 21 Thanked 21 Times in 15 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Boost Issues on Stock Internals Hey Guys, I am venturing into the world of forced induction with my 86 (stock internals). Was hoping some of you could clear a few things up. I understand that boosting any car comes with more maintenance and better diligence. I will be upgrading the Clutch and Flywheel to a Stage 2. The vehicle will be used for daily driving and the occasional autocross. These questions are more directed toward the engine. - Since the FA20 is high compression, wouldn't boost just increase heat and cause the stock internals to wear faster? - I am aiming on 7 PSI. Is anyone running similar boost levels? If so, how many miles have you gone and have you had any major issues? I guess the overall question is "how reliable is the stock FA20 at around 7-8 psi?" - Thanks!

02-12-2017, 11:38 PM	#10
Apoc Senior Member Join Date: Jul 2012 Drives: Raven FR-S 6M Location: Calgary, Canada Posts: 638 Thanks: 348 Thanked 375 Times in 232 Posts Mentioned: 3 Post(s) Tagged: 1 Thread(s)	Do not my friends, become addicted to boost. It will take hold of you, and you will resent it's absence. __________________ “The World is Flat” [\|\|•]=(86)=[•\|\|]

02-13-2017, 02:24 PM	#11
BRZoomTX Senior Member Join Date: Mar 2015 Drives: '13 BRZ Location: Texas Posts: 362 Thanks: 179 Thanked 235 Times in 149 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	My stock '13 motor lasted 3000 miles of daily abuse at 470hp (19psi w/ 5558). With how hard I beat on the car, I'm surprised it didn't blow up sooner. Keep the car around 10psi with e85 (flex fuel), and it should last you a long time. __________________ '13 WRB BRZ ~470whp // Instagram // YouTube

02-14-2017, 10:54 AM	#13
pgranberg11 BoostedBRZ Join Date: Mar 2014 Drives: Turbo BRZ Location: IL Posts: 689 Thanks: 171 Thanked 259 Times in 191 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	i usually run around 10-12 psi depending on weather with flexfuel as well. Been to several track events, only thing was clutch needed to be replaced, and the PSA of clamping your evap line otherwise it will pop off under boost. probably have over 10k miles boosted __________________ Build Thread/Picture Dump Insta: pete.lete

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02-12-2017, 03:07 PM	#2
FirestormFlex Member Join Date: Jul 2015 Drives: 2015 Turbo FR-S Location: Connecticut Posts: 98 Thanks: 35 Thanked 47 Times in 30 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	It's been shown to be quite reliable at reasonable power levels, especially if running E85 for fuel. But the problem in my experience is, 8psi gets boring and you very quickly want more.

02-12-2017, 03:16 PM	#3
Summerwolf Panda Trueno Join Date: Jan 2015 Drives: No twin now. Location: North Indiana Posts: 3,349 Thanks: 2,113 Thanked 2,409 Times in 1,332 Posts Mentioned: 17 Post(s) Tagged: 2 Thread(s)	Save up money for a built block or spare engine! Do some research on the topic and you will find engines lasting seemingly forever and some that let go almost immediately. Tuning is a huge issue, but sometimes when everything is right the motor still goes. All depends!

02-12-2017, 03:27 PM	#4
mcrane Member Join Date: Nov 2015 Drives: 2013 Scion FR-S Location: MA Posts: 78 Thanks: 21 Thanked 21 Times in 15 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Very true. Best not to even start. That way I don't get addicted to boost haha

02-12-2017, 03:34 PM	#6
kmbkk First 86 Driver Baby! Join Date: Jan 2012 Drives: FR-S, Flex Location: Williamsburg, VA Posts: 1,760 Thanks: 520 Thanked 525 Times in 356 Posts Mentioned: 32 Post(s) Tagged: 3 Thread(s)	I have almost 55k miles on my turbo kit. I haven't had any issues with it, other than needing to replace the clutch. And I didn't even do that until 45k miles. I daily drive my car,a and have only tracked it once. I usually leave it at 8psi, but occasionally bump it to 12psi if I want to have a little fun. I have a flex fuel that I'll install in a month or 2 to have even more fun. Hope that helps.

02-14-2017, 10:19 AM	#12
Freddy@PTUNING Senior Member Join Date: Jan 2013 Drives: Honda S2000 & Acura RSX Type-S Location: NoVA Posts: 371 Thanks: 74 Thanked 131 Times in 75 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	We have customers on our turbo kit with over 30k miles, daily driven with some track time. Pump gas and E85, still on the stock motor.

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