Reliability on turbo 86 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Boris_Petrov · 12-30-2018, 06:05 AM

Hello guys, I have thought of puting a turbo on my 86 for a long time and I am keen on the FBM turbo kits. I want my car to be as reliable and as fast as possible. So what do you guys think is the best power range for a reliable turbo FA20 with swapped internals? I'm going to put 9:1 compression ratio pistons.

Any feedback would be really apreciated!

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ggiddix · 12-30-2018, 07:29 AM

Replace the con rods and you should be good. And keep the boost around 10

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Boris_Petrov · 12-30-2018, 07:54 AM

Quote:

Originally Posted by ggiddix

Replace the con rods and you should be good. And keep the boost around 10

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This is for how much horspower?

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DarkPira7e · 12-30-2018, 08:18 AM

Winter vacation huh?

ggiddix · 12-30-2018, 09:29 AM

Quote:

Originally Posted by Boris_Petrov

This is for how much horspower?

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About 275 to the wheel, anything above 300 you need to replace the clutch

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Grady · 12-30-2018, 10:00 AM

Quote:

Originally Posted by Boris_Petrov

Hello guys, I have thought of putting a turbo on my 86 for a long time and I am keen on the FBM turbo kits. I want my car to be as reliable and as fast as possible. So what do you guys think is the best power range for a reliable turbo FA20 with swapped internals? I'm going to put 9:1 compression ratio pistons.

Any feedback would be really apreciated!

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Swapped internals and staying “reliable” around 300hp there is no need to drop the compression ratio. The clutch is easy to upgrade to handle the extra. The transmission then becomes your weak link. After that i beleive the rear shafts are next. Think of Reliabiliy, Horse power, and Cost as a triangle. Now you can only have 2 sides of the triangle. The car can be reliable in at high HP. You are just going to spend a lot.

ggiddix · 12-30-2018, 10:05 AM

The con rods have been found the weak link, as he said you do not need to lower compression. Really all depends on how much you want to spend. The trans wasn't built for big power

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DarkPira7e · 12-30-2018, 10:29 AM

It may be worth noting also that aftermarket rods rarely fit factory pistons. Without personal experience, I don't want to recommend a rod that I -think- fits stock. I would love to hear from anyone who has successfully only replaced the rods and left everything else alone, but that seems too easy.

ggiddix · 12-30-2018, 10:46 AM

You can get aftermarket Pistons and still maintain 12 to 1 compression

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Boris_Petrov · 12-30-2018, 12:51 PM

Quote:

Originally Posted by Grady

Swapped internals and staying “reliable” around 300hp there is no need to drop the compression ratio. The clutch is easy to upgrade to handle the extra. The transmission then becomes your weak link. After that i beleive the rear shafts are next. Think of Reliabiliy, Horse power, and Cost as a triangle. Now you can only have 2 sides of the triangle. The car can be reliable in at high HP. You are just going to spend a lot.

By trans you mean just the clutch or gearbox problems? Probably even twisting axiles?

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ggiddix · 12-30-2018, 12:55 PM

Quote:

Originally Posted by Boris_Petrov

By trans you mean just the clutch or gearbox problems? Probably even twisting axiles?

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Oh and don't forget the valve spring recall

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Boris_Petrov · 12-30-2018, 01:41 PM

Quote:

Originally Posted by ggiddix

Oh and don't forget the valve spring recall

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Isnt't this the Toyota valve spring replacement for 2012-2013 86es?

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ggiddix · 12-30-2018, 01:42 PM

Yup well 2013-2016 they say. Mine is one of them

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Matt@Cosworth · 01-01-2019, 05:24 PM

Quote:

Originally Posted by DarkPira7e

It may be worth noting also that aftermarket rods rarely fit factory pistons. Without personal experience, I don't want to recommend a rod that I -think- fits stock. I would love to hear from anyone who has successfully only replaced the rods and left everything else alone, but that seems too easy.

When we rebuilt our dev car with steel rods I useed Carillo rods and modified them to fit the stock piston
just needs a chamfer adding to replicate the shape of the stock rod, it still leaves plenty of strap thickness for 8000rpm

12-30-2018, 06:05 AM	#1
Boris_Petrov Member Join Date: Dec 2018 Drives: 2013 GT 86 Location: BG Posts: 51 Thanks: 323 Thanked 6 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Reliability on turbo 86 Hello guys, I have thought of puting a turbo on my 86 for a long time and I am keen on the FBM turbo kits. I want my car to be as reliable and as fast as possible. So what do you guys think is the best power range for a reliable turbo FA20 with swapped internals? I'm going to put 9:1 compression ratio pistons. Any feedback would be really apreciated! Sent from my SM-A520F using Tapatalk Last edited by Boris_Petrov; 12-31-2018 at 06:19 AM.

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12-30-2018, 07:29 AM	#2
ggiddix Member Join Date: Aug 2014 Drives: scion frs Location: meriden ct Posts: 43 Thanks: 2 Thanked 6 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Replace the con rods and you should be good. And keep the boost around 10 Sent from my SM-G965U using Tapatalk

12-30-2018, 08:18 AM	#4
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,936 Thanks: 3,200 Thanked 4,096 Times in 2,046 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	Winter vacation huh?

12-30-2018, 10:05 AM	#7
ggiddix Member Join Date: Aug 2014 Drives: scion frs Location: meriden ct Posts: 43 Thanks: 2 Thanked 6 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	The con rods have been found the weak link, as he said you do not need to lower compression. Really all depends on how much you want to spend. The trans wasn't built for big power Sent from my SM-G965U using Tapatalk

12-30-2018, 10:29 AM	#8
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,936 Thanks: 3,200 Thanked 4,096 Times in 2,046 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	It may be worth noting also that aftermarket rods rarely fit factory pistons. Without personal experience, I don't want to recommend a rod that I -think- fits stock. I would love to hear from anyone who has successfully only replaced the rods and left everything else alone, but that seems too easy.

12-30-2018, 10:46 AM	#9
ggiddix Member Join Date: Aug 2014 Drives: scion frs Location: meriden ct Posts: 43 Thanks: 2 Thanked 6 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	You can get aftermarket Pistons and still maintain 12 to 1 compression Sent from my SM-G965U using Tapatalk

12-30-2018, 01:42 PM	#13
ggiddix Member Join Date: Aug 2014 Drives: scion frs Location: meriden ct Posts: 43 Thanks: 2 Thanked 6 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yup well 2013-2016 they say. Mine is one of them Sent from my SM-G965U using Tapatalk

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