|
Forced Induction Turbo, Supercharger, Methanol, Nitrous |
|
Thread Tools | Search this Thread |
06-26-2014, 09:12 AM | #15 |
Senior Member
Join Date: Mar 2013
Drives: 2013 Subaru BRZ
Location: Baton Rouge
Posts: 321
Thanks: 154
Thanked 104 Times in 78 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
That's because the WRX subframe doesn't sit as low. The BRZ is the only Subaru that routes the exhaust over the subframe. Obviously you'd need a custom exhaust if you were attempting this engine swap.
|
06-26-2014, 10:17 PM | #16 |
in orbe terrum non visi
Join Date: Jan 2014
Drives: violent
Location: Mountains
Posts: 1,747
Thanks: 279
Thanked 762 Times in 446 Posts
Mentioned: 62 Post(s)
Tagged: 1 Thread(s)
|
I cant wait to start picking up used fa20dit's in the junkyard and upping the boost and putting them into off road toys.
__________________
I have E85 where there isn't E85, that's my secret. http://www.ft86club.com/forums/showt...t=reaper+build
|
06-27-2014, 06:30 PM | #17 | ||
Senior Member
Join Date: Jun 2012
Drives: ZC6, Junk of ALL sorts
Location: Ohio
Posts: 516
Thanks: 111
Thanked 288 Times in 171 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Supposedly a IIHS insurance car. 26 miles... ... $5,000.ºº Quote:
Totally not worth it, for our cars. Don't feel like looking, but have a question. Does the DiT have oil squirters?
__________________
# 1. Always know where your towel is.
ZC6-CBS, is home |
||
03-15-2015, 11:43 AM | #18 |
Member
Join Date: Oct 2014
Drives: 2015 Scion FR-S ZN6
Location: Dallas, TX
Posts: 17
Thanks: 0
Thanked 3 Times in 3 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
I know this is a slightly old thread, so I apologize for the necro post, but I also didn't want to create a new thread when one already existed for what I was looking to ask.
My question is, would it be possible to bore out the FA20 D4S to achieve the FA20DIT's compression ratio, with some forged pistons and rods, and then use that as a more stable base for a turbo build? Rather than literally turning the D4S into a DIT, it'd be interesting to see if simply lowering the compression and putting forged pistons and rods (or even just simply swapping over DIT pistons and rods) would result in a more reliable turbo build? In speaking with a decent number of well experienced mechanics, the higher compression seems to be one of the factors involved in making the reliability of these turbo builds so dependent on the perfection of the tunes. (correct me if I'm wrong ) |
03-15-2015, 12:03 PM | #19 |
Senior Member
Join Date: Nov 2013
Drives: 2013 BRZ Limited
Location: United States
Posts: 299
Thanks: 11
Thanked 118 Times in 91 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
|
There are 3 or 4 companies that already build lower compression engines for those wanting to run higher boost. I believe it is just a piston and rod swap to lower the compression.
The only time compression needs to be lowered is if you want to make a lot of power. This is generally anything beyond 350 whp in the 86. Over 300 whp and you really need to make sure you are getting decent fuel to prevent detonation. Keep the boost low and it will last longer. There are a few people with 30k+ miles on cars with around 230-240 whp.
__________________
2013 BRZ Limited 6MT
2014 Ram 1500 Quad Cab Black Ram - 8 speed with 3.21 gears 1994 Honda VFR750 - Two brothers 4-1 left side exit exhaust 1993 Honda CB750 Nighthawk |
03-15-2015, 02:09 PM | #20 |
Member
Join Date: Oct 2014
Drives: 2015 Scion FR-S ZN6
Location: Dallas, TX
Posts: 17
Thanks: 0
Thanked 3 Times in 3 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Well, that's exactly why I was suggesting it. If I were to bore it out to the FA20DIT's specs, for the lower compression (10.6:1), and run DIT's pistons and rods (or aftermarket forged DIT piston/rods), I could make some really good power... Especially since the D4S has the superior Toyota direct injection.
Of course, it all comes down the the tranny once you start achieving a high torque output; this is evident is @Reaper's build. |
03-15-2015, 06:32 PM | #21 | |
Senior Member
Join Date: Feb 2012
Drives: 2013 DGM Subaru BRZ (Subie #9)
Location: ATL, US
Posts: 2,667
Thanks: 123
Thanked 860 Times in 552 Posts
Mentioned: 32 Post(s)
Tagged: 0 Thread(s)
|
Quote:
The bore size is the same between the two engines... The CR difference is likely just in the shape of the piston or the heads. I would never put stock DIT pistons in anyways, they aren't very good. If you are getting aftermarket pistons you can get them made to whatever CR you want. |
|
03-15-2015, 08:59 PM | #22 |
Join Date: Nov 2012
Drives: JDL Turbo FRS, 335SC BRZ (ret)
Location: Lehigh Valley, PA
Posts: 932
Thanks: 368
Thanked 1,547 Times in 525 Posts
Mentioned: 380 Post(s)
Tagged: 6 Thread(s)
|
Owning both I would take the BRZ FA20 any day over the WRX DIT....at least for now. Even with the little twin scroll turbo in there an AVO/SC or similar equipped BRZ is way faster and with spool that isn't too far off. The FA20 we spin to 7850 as a matter of routine. The WRX hates life above 6000.
Yes you can make the WRX make some good dyno numbers in the mid range...but you're so limited with just direct injection that you just don't have the time to inject anything over 300hp at the top end. I'm sure in a couple of years we'll have alternatives but right now this swap is not viable for most folks IMO. With the 86 platform we have it way easy...300 hp on stock fuel with plenty of upgrades, motor that holds up to 300 tq, etc... |
The Following 5 Users Say Thank You to Xero-Limit For This Useful Post: | Draco_PR23 (03-17-2015), raven1231 (03-15-2015), sam69 (03-15-2015), SillySaxon (03-11-2016), xwd (03-16-2015) |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FA20DIT vs FA20 D4-s? | hmong337 | Forced Induction | 31 | 07-26-2020 02:11 AM |
Any of you convert from a WRX? | newports | FR-S / BRZ vs.... | 101 | 04-03-2014 09:42 PM |
FA20DIT parts | glorydays | Forced Induction | 8 | 03-14-2014 05:03 PM |
FA20DIT vs EJ25 - 2015 WRX and STI get dyno tested | kbye | Other Vehicles & General Automotive Discussions | 7 | 02-27-2014 09:40 AM |
is it possible to convert metric to imperial? | chenshuo | BRZ First-Gen (2012+) -- General Topics | 26 | 01-07-2014 11:41 AM |