Maximum Boost? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

tslyw · 03-27-2016, 09:50 PM

Does anyone know what the maximum boost (approximately?) that can be run on stock internals with the FRS?

cdq85 · 03-27-2016, 10:07 PM

10 psi on pump gas seems to be the safe limits. E85 has seen guys pushing 400-450 with upgraded fuel systems and such. Im guessing thats around 14-16 psi? Your tranny won't last long at those numbers unless you have AT

Stimmed · 03-28-2016, 12:06 AM

Quote:

Originally Posted by cdq85

10 psi on pump gas seems to be the safe limits. E85 has seen guys pushing 400-450 with upgraded fuel systems and such. Im guessing thats around 14-16 psi? Your tranny won't last long at those numbers unless you have AT

Has the auto actually been proven to hold more? Interested as im looking to push a bit of power soon and was worried about the trans going and there not being any real upgrade options for it in aussie

Drakiv · 03-28-2016, 12:09 AM

Quote:

Originally Posted by Stimmed

Has the auto actually been proven to hold more? Interested as im looking to push a bit of power soon and was worried about the trans going and there not being any real upgrade options for it in aussie

I know there is a place offering auto trans upgrades on here somewhere. If you had a manual, PAR engineering is in Australia.

Stimmed · 03-28-2016, 12:12 AM

Quote:

Originally Posted by Drakiv

I know there is a place offering auto trans upgrades on here somewhere. If you had a manual, PAR engineering is in Australia.

Yeah but getting them to get me shipping quotes and no responses I haven't bothered took to long. And the other place that sells it wants about 1kUS just for shipping

blows the price out a fair bit sadly.

Drakiv · 03-28-2016, 12:15 AM

Quote:

Originally Posted by Stimmed

Yeah but getting them to get me shipping quotes and no responses I haven't bothered took to long. And the other place that sells it wants about 1kUS just for shipping

blows the price out a fair bit sadly.

Sorry to hear

Rifle · 03-28-2016, 01:28 AM

I daily 12psi(69mm pulley) on my Sprintex 210 Twin Screw.

xkalelx · 03-28-2016, 06:34 AM

I just would like to add, seeing the number of buys that blow up on stock motors; if you only have 91 available, 8psi should be your maximum safe boost level. I putz around on 8psi on e85 for daily driving and 12psi is my high boost map on e85.

raven1231 · 03-28-2016, 06:57 AM

How much psi dependings on the turbo being used, as well as other factors.

go_a_way1 · 03-28-2016, 08:03 AM

Boost does not kill engines, Torque is what kills engines. You should be considering how much torque you will be producing and when in the power band you are making it. Too much too soon and you will bend your rods.

Toyota86.ir · 03-28-2016, 10:43 AM

Quote:

Originally Posted by tslyw

Does anyone know what the maximum boost (approximately?) that can be run on stock internals with the FRS?

For low quality pump gas max is 6psi
For high quality pump gas max is 9psi
For E85 max is 12.5psi

Tune is so important and in low rpm high torque of PD superchargers ( above 10psi) make alittle stress on engine.

You need good tune plus oil cooler.

jasonojordan · 03-28-2016, 10:53 AM

So e85 it looks like is much nicer to the motors running boost is that correct?

cdq85 · 03-28-2016, 11:04 AM

Quote:

Originally Posted by Stimmed

Has the auto actually been proven to hold more? Interested as im looking to push a bit of power soon and was worried about the trans going and there not being any real upgrade options for it in aussie

yes, I'm pretty sure the AT was proven to hold a good bit more power actually. Way too lazy to search and find the threads about it even though I could have done it by the time I finished typing this.

Tectoniic · 03-28-2016, 11:14 AM

Quote:

Originally Posted by jasonojordan

So e85 it looks like is much nicer to the motors running boost is that correct?

Minus the lower MPG and shitty availability in some areas it really is a bit of a "wonder fuel" for high compression engines.

It has a much higher knock resistance so you can run more aggressive timing and make more power safer. It also burns cooler which in turn keeps everything else cooler also giving more power and further decreasing the chances of knock.

03-28-2016, 01:28 AM	#7
Rifle EX-86 Supercharged God Join Date: Aug 2015 Drives: '16 Series.HyperBlue BRZ Location: Philadelphia->Montana Posts: 766 Thanks: 220 Thanked 479 Times in 253 Posts Mentioned: 16 Post(s) Tagged: 1 Thread(s)	I daily 12psi(69mm pulley) on my Sprintex 210 Twin Screw. __________________ Sprintex 210 Supercharged HyperBlue BRZ "HI MOM" 295WHP/220TQ

03-28-2016, 06:34 AM	#8
xkalelx Senior Member Join Date: Feb 2014 Drives: 2013 BRZ black Location: Cincinnati, OH Posts: 394 Thanks: 265 Thanked 283 Times in 113 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	I just would like to add, seeing the number of buys that blow up on stock motors; if you only have 91 available, 8psi should be your maximum safe boost level. I putz around on 8psi on e85 for daily driving and 12psi is my high boost map on e85. __________________ Unfriendly Garage EFR Turbo BRZ build #UGBRZ #builtmotorcrew #UGBRZ

03-28-2016, 06:57 AM	#9
raven1231 Senior Member Join Date: Aug 2013 Drives: 2013 Firestorm FR-S, 2016 DGM WRX Location: Cincinnati, Ohio Posts: 4,580 Thanks: 8,264 Thanked 3,118 Times in 1,667 Posts Mentioned: 24 Post(s) Tagged: 1 Thread(s)	How much psi dependings on the turbo being used, as well as other factors. __________________ http://www.ft86club.com/forums/showthread.php?t=59870

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
What gear+rpm to experience maximum torque?	SamuelDev	BRZ First-Gen (2012+) -- General Topics	6	11-11-2015 11:11 AM
Maximum weight in the trunk?	djmm	Scion FR-S / Toyota 86 GT86 General Forum	20	08-13-2015 11:40 AM
Digital boost gauge w/ vent pod grim speed boost controller	Meetjoeblack	Engine, Exhaust, Bolt-Ons	0	03-09-2015 01:27 PM
“Maximum Attack” Scion FR-S	stugray	Scion FR-S / Toyota 86 GT86 General Forum	13	02-01-2015 08:45 PM
MAXIMUM you would pay for a TRD Supercharger installed?	FRiSson	Forced Induction	24	11-04-2012 01:08 AM

03-27-2016, 10:07 PM	#2
cdq85 Senior Member Join Date: Dec 2014 Drives: 2013 Raven FR-S Location: Greensburg, PA Posts: 249 Thanks: 107 Thanked 285 Times in 113 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	10 psi on pump gas seems to be the safe limits. E85 has seen guys pushing 400-450 with upgraded fuel systems and such. Im guessing thats around 14-16 psi? Your tranny won't last long at those numbers unless you have AT

03-28-2016, 10:53 AM	#12
jasonojordan Senior Member Join Date: Jul 2013 Drives: 2013 satin white brz limited Location: Cottage Grove MN Posts: 1,049 Thanks: 162 Thanked 511 Times in 326 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	So e85 it looks like is much nicer to the motors running boost is that correct?

User Name		Remember Me?
Password