STI engine
 

What's going on guys? New to the site here. I'm very excited for the ft86 it looks amazing! I'm VERY concerned that they will manage to **** it up before the production car but let's keep our fingers crossed.

So who here thinks it will be relatively easy to drop an sti motor in here? I thought this car was going to be turbocharged stock. Hell when I drive one I might very well find they picked the right motor from the start. But just for S&G who thinks it will bolt up or do you reckon itll need some fabrication?

It will need fabrication.

At the very least you'll need modified wiring harness, custom headers, oil pan, downpipe, IC piping, IC mounting (and/or bumper beam if you want anything of worthwhile size). On the plus side, the EJ257 longblock should bolt right up to the stock motor mounts and bellhousing.

But, there won't be enough room between the engine and the firewall to plumb the exhaust in the same way as it has always been done on the Impreza. The turbo will need to be mounted out front like on a 2010+ Legacy GT. The problem is that the EJ will be ~1" longer than the stock engine (EJ = Timing Belt, FA = Timing Chain), and there might not be enough room left to stick a turbo between the accessory belt and the radiator.

I wonder if any parts will be sharable between the 2 engines. EJ207 and FA20
EJ207
http://image.motortrend.com/f/920979...STI+engine.jpg
FB20
http://1.bp.blogspot.com/-LlaWhnukxt...5BC+FB20+4.jpg
FA20
http://www.ft86club.com/forums/attac...3&d=1315924693
Where the engine sits
http://www.ft86club.com/forums/attac...1&d=1316117092

just put a porsche engine in ...and make a custom exhaust to come out from the front fenders.

And light pedestrians on the sidewalks ablaze.

Just as long as I can spray close spectators with my nitrous as Luda admires my timely arrival I'll be happy.

Okay no but seriously fairly sure there'll be turby ones later down the track anyway. Haven't they already released that there's a possibility of a 1.6T a year after initial release?

What the hell? Does anyone else think that the oil filter that is mounted on the FB20 and concept car looks like a disaster waiting to happen? That looks like it will make a mess of the engine bay. I notice that there is a lip there, but it can't possibly hold all the oil that will come out of that filter?

That was the best thing about the EJ series motors, the oil filter was mounted on the bottom of the motor pointing straight down...

Never seen recent V engine trucks? they have filter like that & it's working perfectly

I haven't. I don't really pay any attention to trucks at all. I'm also not 100% up to date with current\future Subaru tech.

My concern when I saw the above picture(s) was that the filter would still be full of oil and when you take it off it would drain out of the filter, fill that recessed area and spill down the block.

When you shut the motor off the oil must drain out of the filter then?

Under the oil filter mount, there is a small nipple which you can pull off to drain that catch area. Some put a small disposable bottle or cup directly under it to catch the oil that drips out. Some others have even gone as far as to run a hose all the way down by the oil pan.

Perfect! Thank you sir, for taking the time to explain how it works.

No problem :happy0180:

Slightly OT: Anybody have a guess as to whether the cams on the FT-86 will be chain driven or belt driven? What does Subaru usually use?

^Expect to have it chain. Older model was belt, but recently been chain

Some detail about the FB20 that might apply to the FA20:

To add, the current Tacoma has it in that similar position and it's makes it so much easier to change and is a lot cleaner. I'm glad they've decided to place it in the same position.

http://0.tqn.com/d/trucks/1/0/_/M/1/...oma_engine.jpg

Same engine as my FJ. Changing oil is a breeze!

Hearing that it should have a timing chain is really exciting to me. Changing timing belts is such an expensive part of maintanence!

WHAT? I replaced my Impreza's Timing belt lil while ago and only cost me $50. Chain would of cost me double or triple of the cost

I remember when I almost bought a B5 Audi S4 a few years ago. The thing that stopped me from buying it was the timing belt replacement cost. It was somewhere around $1,500. $350 for parts: Belt, Actuator, Cam Idler, Cam Tensioner and the rest in labor.

You replaced it yourself then. I'm talking for the average person who doesn't know how to replace one themselves, bringing it to a shop can cost over $1000. Chain's last alot longer.

technically, you should change belt or chain around same time anyways. Maybe 30~60k difference

I was under the impression you could wait alot longer with a chain

Commonly chain replacement said to be every 100k vs belt is every 60k... but official Subaru maintenance schedule inspected every 30k, but don't need to replace til 100k.

edit. BUT some chain said no need to change it 200k... so it's all up to how the company makes it

I thought belts are 80-100k, chains can double that or even stand the whole life of the engine

Again, it's all up to the car maker. Chain still stretch resulting loosen the tension equal to misfire & other engine damaging stuff.

I have only worked w timing chain twice, so I'm no expert in that field. IMO I prefer belt over chain do to light weight & easier to install... but that's just me.

re Timing Chains:

I am not an expert, but my understanding has always been that timing chains rarely need to be replaced. They are tensioned by a tensioner. They perform better than belts, though perhaps not as well as gear-driven cams.

Again, I am not an expert. But I was happy to be rid of my Tercel and the headache of belt replacements because belts were something that I could not do myself. (The Tercel was a great car, by the way. Mine was, anyway.)


:happy0180:

^Belt have tensioner too

^^ Yes.

That's what I knew chains to be as well. Rarely ever do they need replacing, if properly maintained. Again, I'm no expert either, but that's what I understand about timing chains.

Hm... It's debate kinda thing for me.

You wanna tune your engine, I'm not sure chain is good or not. I don't see much chain tuned engine (other than truck engines). BUT for DD cars, maybe chain is better? IDK

I think it depends on the chain design. I think Suzuki uses them on one of their motors and it's supposed to be good for the life of the vehicle. But it is running in an oil bath on the bottom or something so it is perpetually lubricated.

Metal will still fatigue and fail over time. So how hot the chain gets, how big/strong the links are, etc... will be factors.

I wouldn't assume all chains are good for the life of the car just because some are.

I'm kind of concerned about the plastic intake manifold on the FB20. It leads me to believe the FA20 will have it as well.
http://response.jp/imgs/zoom/249397.jpg

I suppose it leaves another product for aftermarket to make.

I wonder if we will see red STi manifolds.

That's the outside shell. Inside have a metal. iirc they did that on newer EJ enignes

^ Kind of hard to tell on the BRZ concept since the whole motor's blinged out in chrome. Turbo EJ's had aluminum, but I don't think the non-boosted FA will.

Doesn't the plastic seem a little cheap to you guys?

The plastic manifold is better for weight, heat, and price... I heard they have great flow too. While I am instinctively against plastic engine components this is not groundbreaking tech for subaru, so I am more excited than worried about it.

What about CF?

do you want this under $25k (£20k) ??

No, but for 30.000 €, yes!