Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
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-   -   Reliability on turbo 86 (https://www.ft86club.com/forums/showthread.php?t=132138)

Boris_Petrov 12-30-2018 07:05 AM
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!

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ggiddix 12-30-2018 08:29 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 08:54 AM
Quote:
Originally Posted by ggiddix (Post 3167970)
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 09:18 AM
Winter vacation huh?

ggiddix 12-30-2018 10:29 AM
Quote:
Originally Posted by Boris_Petrov (Post 3167971)
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 11:00 AM
Quote:
Originally Posted by Boris_Petrov (Post 3167965)
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 11:05 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 11:29 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 11:46 AM
You can get aftermarket Pistons and still maintain 12 to 1 compression

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Boris_Petrov 12-30-2018 01:51 PM
Quote:
Originally Posted by Grady (Post 3167978)
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 01:55 PM
Quote:
Originally Posted by Boris_Petrov (Post 3168003)
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 02:41 PM
Quote:
Originally Posted by ggiddix (Post 3168004)
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 02:42 PM
Yup well 2013-2016 they say. Mine is one of them

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Matt@Cosworth 01-01-2019 06:24 PM
Quote:
Originally Posted by DarkPira7e (Post 3167983)
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


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