Engine swap JDM EJ25 STI engine

[FRSToyota86]

I am thinking this engine could fit in with the stock mounts. I havent found much information. I think its a good topic to be discussed and wont be too expensive to do if you find a good used engine supplied with the turbo.

Mr Gushi has a similar ej25 engine in his car. It would be nice if we could narrow down year and perhaps part numbers. In case someone wants to order from Japan.

[EvilBeaverFace]

Ken Gushi and Toshiki Yoshioka both use EJs. Only seen pics of Gushi's and all I could notice was the cosworth intake manifold. Yoshioka uses a tomei genesis.

Its not impossible by any means but those guys have race team budgets. If you have money then ok.

There is also the debate that the FA is a better engine. I'm going to wager this thread will turn into an argument about that, the last one did lol.

Edit: I think the mounts are a tad different anyway

[FRSToyota86]

I guess you are right the FA is a newer engine after all but its only a 2lt.

[SmsAlSuwaidi]

Originally Posted by FRSToyota86

I guess you are right the FA is a newer engine after all but its only a 2lt.

displacement isnt everything

[boxer 2.5]

Originally Posted by SmsAlSuwaidi

displacement isnt everything

There's no replacement for displacement. Except Forced Indiction. N/A vs. N/A? Never a replacement.

[SmsAlSuwaidi]

Originally Posted by boxer 2.5

There's no replacement for displacement. Except Forced Indiction. N/A vs. N/A? Never a replacement.

Oh so his putting an ej25 and going na with it ?

This isnt some small block vs big block debate, but with alot of import motors displacement isn't everything.

[1086]

The FA engine is stronger and apparently makes more power than the EJ engine. Crawford did a test, same size turbo, on both the EJ and FA engine. The EJ engine made 360 horsepower and the FA engine made 430 horsepower - same turbo, smaller engine... hmmm - you might just want to stick with what you got

[FRSToyota86]

would assume extra displacement would make a significant power gain. Ken and Yoshioka both have 2.5lt engines no? I wish there was an in-debt write up about jdm engine swaps.

If you could find a great deal on a used engine. In theory it would cost just about the same as going with a premium turbo kit.

I am sorry for opening a can of worms, I m just trying to weight my options and learn more.

Perhaps I should give up engine swap and go with a turbo kit but i wont be the same. Anyways that engine would be awesome on gt86 platform.


http://www.importtuner.com/features/.../photo_12.html

[1086]

If you have the money to do an engine swap, plus replace parts and deal with all of the unknowns with regard to fitment and placement - go right ahead - but at the same time it seems to be more trouble than its worth. Do you want to go through that whole process? What are you looking to benefit/gain from a swap vs. a FI kit? Just horsepower?

[FRSToyota86]

I could not afford a new crate engine at this time, but if I could if I find a used engine. It would be pretty cool to have a 2.5 sti engine that is mostly all that got me fired up I guess.

I was thinking about sc and turbo charging at the same time. but thats going to be way too expensive. Similar to MRT Performance FR-S.

Bottom line. I should just go with a turbo kit like greddy, save my money and dont complicate things. All I need is some more power at the top end for occasional track use and call it a day.

[lickitysplit]

Originally Posted by 1086

The FA engine is stronger and apparently makes more power than the EJ engine. Crawford did a test, same size turbo, on both the EJ and FA engine. The EJ engine made 360 horsepower and the FA engine made 430 horsepower - same turbo, smaller engine... hmmm - you might just want to stick with what you got

I'm no expert, but I'm certain that the 12.5:1 compression ratio compared to the 8.5:1 in the EJ is to blame for the extra bump in power. Find an EJ25 at 12.5:1 and im sure you'll see more power in that engine than the FA20

[mswhong]

If an EJ had a 12.5:1 CR, then you'd see powers well above that 430hp you mentioned.. Remember, even though less displacement, compression matters when going FI

[1086]

Well I don't know this for sure but current STI's run like 15-20 psi right? If that is the case, I don'y think that you could run that high of psi @ 12.5:1 on the EJ. I might be wrong on that though...


That would be an interesting test, however, I don't know this but what is the difference when you look at

[2.5L @ 12.5:1] vs. [2.0L @ 12.5:1]
and
[2.5L @ 8:1] vs [2.0L @ 9:1]

same turbo

[SmsAlSuwaidi]

Not every block is built to withstand 12.5:1, and DI helps a lot with high cr , Ferrari now has a 14:1 engine that runs on pump


Sent from my IBrick