new mortor build idea? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jc1993 · 02-17-2014, 08:59 PM

so i hear the new wrx sti are using the same port inject method as our fa20 engines... queston is would we be able to use the 2015 sti block with our fa20 head? sounds like a Frankenstein (k24vtec) build but if its possible il would def do it! i wanna get the most power i can from n/a.. plz comment thanks

FR-S Matt · 02-17-2014, 09:26 PM

Sorry, first thing I thought of when reading the title.

OICU812 · 02-17-2014, 09:33 PM

Quote:

Originally Posted by FR-S Matt

Sorry, first thing I thought of when reading the title.

Same,

wparsons · 02-17-2014, 09:56 PM

How does the engine sharing the port fuel injection (which it doesn't) make any of the block parts compatible?

Last I saw the next STI will use the same engine as the current STI (EJ25) while the next WRX will have the FA20DIT which is a pure direction injection (not split port/direct injection like we have) engine.

R.S-HawK · 02-17-2014, 10:02 PM

Quote:

Originally Posted by FR-S Matt

Sorry, first thing I thought of when reading the title.

That'd be a mortAr.

jc1993 · 02-17-2014, 11:10 PM

Quote:

Originally Posted by FR-S Matt

Sorry, first thing I thought of when reading the title.

hahah my fault dam auto correct! lame excuse

FR-S Matt · 02-17-2014, 11:14 PM

Quote:

Originally Posted by jc1993

hahah my fault dam auto correct! lame excuse

All in good fun.

Kidding aside, it will be interesting to see what kind of cross platforming we can do. Interested to see what fits and what is an "upgrade". I liked taking the LS7 manifold and putting it on my LS1 Camaro. Easy power gain.

jc1993 · 02-17-2014, 11:15 PM

Quote:

Originally Posted by wparsons

How does the engine sharing the port fuel injection (which it doesn't) make any of the block parts compatible?

Last I saw the next STI will use the same engine as the current STI (EJ25) while the next WRX will have the FA20DIT which is a pure direction injection (not split port/direct injection like we have) engine.

didnt really look into it but makes sense/: it would be awesome thou. really hope something like that would happen in the future...

1stGenBRZ86 · 02-17-2014, 11:30 PM

for the price of a 2015 sti motor, I'm sure a fully built short block from one of the vendors would come out way cheaper...

jc1993 · 03-01-2014, 08:07 PM

Quote:

Originally Posted by 1stGenBRZ86

for the price of a 2015 sti motor, I'm sure a fully built short block from one of the vendors would come out way cheaper...

true but i want that 2.5l torque... i dont think I'm going to FI my fa20 anytime soon.. too scared lol

1stGenBRZ86 · 03-01-2014, 08:21 PM

Quote:

Originally Posted by jc1993

true but i want that 2.5l torque... i dont think I'm going to FI my fa20 anytime soon.. too scared lol

so you don't want FI, but want to swap a 2015 STi motor...you do know that STi's are turbo right?

kiichiro · 03-02-2014, 12:39 AM

It will work
It will fit
It won't be plug and play
It is however a factory turbo setup on a fa20

Snake · 03-02-2014, 02:29 AM

2015 WRX STi is a EJ25, 2015 WRX (non-STi) is a FA20DIT.

(A) Source:
http://www.caradvice.com.au/subaru/wrx/

I'd say by the time you'd bought the FA20DIT and modified it to fit, you'd probably have spent enough to rebuild and turbocharge your NA FA20 (and made more power and depending on the shop and parts, made it more reliable).

jc1993 · 03-02-2014, 06:54 PM

Quote:

Originally Posted by 1stGenBRZ86

so you don't want FI, but want to swap a 2015 STi motor...you do know that STi's are turbo right?

sure do.. i was looking just at the block.. im pretty sure sumone is bound to blow it at put it up for sell or somthing.. but since now i know it won't work all i can do is dream for a 200hp 170tq na engine<\3

03-02-2014, 12:39 AM	#12
kiichiro corolla specs/GTR looks Join Date: May 2013 Drives: ooh oooh pretty tail lights Location: slower than a accord V6 Posts: 490 Thanks: 229 Thanked 113 Times in 79 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	It will work It will fit It won't be plug and play It is however a factory turbo setup on a fa20 __________________ SOLD THEM BOTH Hers: 2007 987S Mine: 2012 991S That was fun, thanks Hachi

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02-17-2014, 11:30 PM	#9
1stGenBRZ86 Senior Member Join Date: May 2013 Drives: 2013 BRZ Location: NYC Posts: 207 Thanks: 110 Thanked 58 Times in 35 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	for the price of a 2015 sti motor, I'm sure a fully built short block from one of the vendors would come out way cheaper...

03-02-2014, 02:29 AM	#13
Snake Senior Member Join Date: Dec 2012 Drives: ADM Toyota 86 GT Location: Australia Posts: 117 Thanks: 32 Thanked 63 Times in 37 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	2015 WRX STi is a EJ25, 2015 WRX (non-STi) is a FA20DIT. (A) Source: http://www.caradvice.com.au/subaru/wrx/ I'd say by the time you'd bought the FA20DIT and modified it to fit, you'd probably have spent enough to rebuild and turbocharge your NA FA20 (and made more power and depending on the shop and parts, made it more reliable).

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