Port & Polishing Turbos - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

go_a_way1 · 09-19-2016, 02:30 PM

Hey guys, so thoughts on porting and polishing turbos? The SBD kits I have on order comes with the mitsubishi 20g turbo as you probably know.
I do know you need to port the wastegate to prevent boost creep, however since it will be at the shop getting that done should I bother with a full port and polish? I think it is a waste on this turbo but what are your thoughts??

Tectoniic · 09-19-2016, 03:16 PM

In for answers as well. I don't plan on upgrading the turbo (easy to say right now) but it won't be in the car for a while anyway.

go_a_way1 · 09-19-2016, 03:28 PM

Quote:

Originally Posted by Tectoniic

In for answers as well. I don't plan on upgrading the turbo (easy to say right now) but it won't be in the car for a while anyway.

You planning on porting your wastegate too or you going to just deal with the boost creep?

Toyarzee · 09-19-2016, 03:45 PM

Block off the internal gate + add Tial 38-44 mm external gate = no more creep

go_a_way1 · 09-19-2016, 03:52 PM

Quote:

Originally Posted by Toyarzee

Block off the internal gate + add Tial 38-44 mm external gate = no more creep

It will be cheaper to port it out to be honest lol. Its like $100/hour for turbo work at the local turbo shop

Toyarzee · 09-19-2016, 04:58 PM

Quote:

Originally Posted by go_a_way1

It will be cheaper to port it out to be honest lol. Its like $100/hour for turbo work at the local turbo shop

So no disassembly of turbo for this? I've got 3 turbos at home cause it's always proven cheaper to replace than repair... BB turbo especially.

Another plus besides elimnating creep, is allowing for more accurate boost control and no spiking when going external gate

I'm just here for my own mental notes at this point, not trying to perpetuate the propaganda lol

D_Thissen · 09-19-2016, 05:06 PM

Interested in answers

go_a_way1 · 09-19-2016, 06:03 PM

Quote:

Originally Posted by Toyarzee

So no disassembly of turbo for this? I've got 3 turbos at home cause it's always proven cheaper to replace than repair... BB turbo especially.

Another plus besides elimnating creep, is allowing for more accurate boost control and no spiking when going external gate

I'm just here for my own mental notes at this point, not trying to perpetuate the propaganda lol

I think its got to be disassembled (maybe not though as the wastegate just dumps to the down pipe so no worries about metal shavings), but its a new turbo and off the car already so I don't think its anything I cant handle. Worst case I can pay the shop to just take it apart if need be.

External wastegates do have there pros haha.

Luftwaffel · 09-23-2016, 02:16 PM

Hey, if you got the SBD400X I think it's already ported. I just ordered too.

go_a_way1 · 09-23-2016, 02:18 PM

Quote:

Originally Posted by Luftwaffel

Hey, if you got the SBD400X I think it's already ported. I just ordered too.

Oh really? That would be nice! Kits ship out Monday

Luftwaffel · 09-23-2016, 02:25 PM

Quote:

Originally Posted by go_a_way1

Oh really? That would be nice! Kits ship out Monday

Yeah really excited to get this thing in and get to work. My VW daily has been in the shop for over two weeks though so I'm not sure what's going to happen.

go_a_way1 · 09-23-2016, 02:31 PM

Quote:

Originally Posted by Luftwaffel

Yeah really excited to get this thing in and get to work. My VW daily has been in the shop for over two weeks though so I'm not sure what's going to happen.

My FRS is the only car I own... so I hope it goes smoothly lol!

Luftwaffel · 09-23-2016, 02:37 PM

Quote:

Originally Posted by go_a_way1

My FRS is the only car I own... so I hope it goes smoothly lol!

Haha. Btw, if you're installing yourself, if you haven't done the oil pan before, be careful not to gouge your upper oil pan assembly when you remove the lower pan, and get a big ass can of acetone to soften the gasket.

go_a_way1 · 09-23-2016, 02:41 PM

Quote:

Originally Posted by Luftwaffel

Haha. Btw, if you're installing yourself, if you haven't done the oil pan before, be careful not to gouge your upper oil pan assembly when you remove the lower pan, and get a big ass can of acetone to soften the gasket.

Thanks that's a good tip!

09-19-2016, 03:16 PM	#2
Tectoniic #FiftyShadesOfBlue Join Date: Apr 2015 Drives: 2015 FR-S Location: Chicago Posts: 1,195 Thanks: 2,086 Thanked 1,425 Times in 730 Posts Mentioned: 13 Post(s) Tagged: 4 Thread(s)	In for answers as well. I don't plan on upgrading the turbo (easy to say right now) but it won't be in the car for a while anyway. __________________ Engine/Exhaust: OFT w/ E85 Tune \| FT86SF Catted UEL \| Invidia Q300 Catback Wheels/Tires/Suspension: Avid.1 AV-20 18x8.5 +33 w/ 245/35/18 PSS \| RCE Yellow Springs \| Velox LCAs Cosmetic: Valenti FT86SF Special Edition Tails \| Diode Dynamics Full HID/LEDs \| BRZ Fender Garnishes

09-19-2016, 05:06 PM	#7
D_Thissen Senior Member Join Date: Jan 2014 Drives: '13 Argento FR-S (Sold) Location: Ontario Posts: 2,126 Thanks: 3,209 Thanked 1,439 Times in 855 Posts Mentioned: 19 Post(s) Tagged: 2 Thread(s)	Interested in answers __________________ My FR-S Build IG: dthissen

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09-19-2016, 03:45 PM	#4
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