Would you guys prefer FB20 or FB25 for NA FT?

[Dimman]

Originally Posted by OldSkoolToys

Wait, whoa, how did this escape my notice? What's his HP non-spray? Thats INSANE for a 7M.

I'm a little behind the times on its tuning levels, but last I checked, ~750 was the highest.

750 was a while ago. I think the big number is some Greek guy that has a 7M in a drag rail car.

It used to be Duane and Nate that had the biggest numbers in the Pacific Northwest for 7M's. I can't remember the exact numbers but Duane was around 813 (?) all turbo, and Nate's was 830-850 (???) on spray. That was like 4-5 years ago.

As far as I know Nate has gone JZ, and now Duane is the PACNW hp king (of the 7Ms).

Car make 920 whp all turbo (race gas) and 710 all turbo (94 pump gas and meth injection).

[[es vi: eks]]

Originally Posted by SCIONIZED

All this this boring stroked out turbo 2.0,2.5lt gives me a headache. lol What about the Subaru 3.6 flat 6 boxer @ 256hp and 247 lb.ft. torque with a turbo???? Whatever it takes just give me 300 hp+ paleeese! I would also like to see the lineatronic CVT transmission. If leave it in the automatic mode you get better performance and fuel economy or you can use as 6 speed manual mode. Any thoughts here?

That idea was floating round my head for the FT. Only problem is it wouldnt have the D-4S

So far as I know, No one has turboed a 3.6 yet. ( one place attemped to build one but ran into troubles, because it turned out to be a prototype motor and was quite different to production EZ36)

I would rather destroke the 3.6 to a 3.3L

I have heard a owner say that the 3.6 runs a bit ruffer at higher revs...
Also is Fitted with the tiny pre bent conrods? Allows to increase from 3L to 3.6L
I dont know how much those pre bent rods effect preformance improvements like turbo etc? Any one know?

I wonder if subaru is going to do a newer big 6?
I had heard that even the 3.6 is still under powered in the Tribeca
I would love to see a 4L 6 or even a flat 8 well dreams are free.

[Zenrael]

Originally Posted by Dimman

My god I want this hypothetical de-stroked FB25 sooooo badly! 94mm bore X 72mm stroke.

Check this out: Same bore as the 2GRFSE. So using almost the exact same specs for combustion chamber, ports, valves, CR etc... So...

205 hp @ 7500 rpm (based on the amount of air the 2GR is moving to make its 306 hp @ 6400 rpm)

That sound good with an 8000-8500 rpm redline?

Edit: This could be a very legitimate high-performance 2.0L, build the bottom strong so Subaru could boost it for the next WRX or STI.

+1

Sounds really good.

[old greg]

Originally Posted by [es vi: eks]

I would rather destroke the 3.6 to a 3.3L

You can get close to that. EZ36 blocks with an EZ30 crank comes out at ~3.2 from what I've been told.

Originally Posted by [es vi: eks]

I have heard a owner say that the 3.6 runs a bit ruffer at higher revs...
Also is Fitted with the tiny pre bent conrods? Allows to increase from 3L to 3.6L
I dont know how much those pre bent rods effect preformance improvements like turbo etc? Any one know?

I wonder if subaru is going to do a newer big 6?
I had heard that even the 3.6 is still under powered in the Tribeca
I would love to see a 4L 6 or even a flat 8 well dreams are free.

I'm not sure the "bent" conrods are necessarily any weaker than normal (other than possibly placing the rod bolts under higher stress). The issue is finding an aftermarket company that will sell you a set of forged rods that are similarly asymmetrical, as the stockers in both EZ's are rather flimsy.

3.6 is the absolute limit for the EZ. Any more stroke would cause interference problems with the crankcase, and that's with the asymmetrical conrods. And there's no more room for increasing the bore.

Future flat sixes might have higher bore pitches, but don't expect to see any more stroke, as Subaru is fairly limited in terms of deck height. The motor has to sit between the frame rails.

If they made a flat 8 I would swap it into everything I owned, even though it would mean a ~200lbs weight gain. The sounds that thing would make would be totally worth ruining my handling.

[[es vi: eks]]

Originally Posted by old greg

You can get close to that. EZ36 blocks with an EZ30 crank comes out at ~3.2 from what I've been told.

I thought that the cranks on the EZ30R/EZ36 are completely different?
The oil pump gear drive is in a different place on the EZ36.
Also I thought that almost all the parts on the EZ30/30R/36 are completely different. As in nothing bolts up from either 3?

Do you have a link for the 3.2? I would love to find out more

[old greg]

I don't recall ever seeing it done, I think I just saw a post on Nasioc by someone that did a little math. I was unaware of the difference in oil pump drive, but hell, you could always just dry sump it. And if you did, some rods/bolts, bearings and valve springs would set you up for some serious revs.

[[es vi: eks]]

Originally Posted by old greg

I don't recall ever seeing it done, I think I just saw a post on Nasioc by someone that did a little math. I was unaware of the difference in oil pump drive, but hell, you could always just dry sump it. And if you did, some rods/bolts, bearings and valve springs would set you up for some serious revs.

Be a intresting motor. Maybe a good replacement for the EG33 in my SVX

[Crashoverride]

Originally Posted by Dimman

Were you up for PACNW last summer? Get to hear those rods spinning on the fly-by? Sex.

I was in a GTR, the gray one

[ichitaka05]

Originally Posted by [es vi: eks]

That idea was floating round my head for the FT. Only problem is it wouldnt have the D-4S

So far as I know, No one has turboed a 3.6 yet. ( one place attemped to build one but ran into troubles, because it turned out to be a prototype motor and was quite different to production EZ36)

I would rather destroke the 3.6 to a 3.3L

I have heard a owner say that the 3.6 runs a bit ruffer at higher revs...
Also is Fitted with the tiny pre bent conrods? Allows to increase from 3L to 3.6L
I dont know how much those pre bent rods effect preformance improvements like turbo etc? Any one know?

I wonder if subaru is going to do a newer big 6?
I had heard that even the 3.6 is still under powered in the Tribeca
I would love to see a 4L 6 or even a flat 8 well dreams are free.

Or just bore it out the EZ30. EZ36 is pretty much bored out EZ30.

If you wanna turbo the EZ series, I would use EZ30 and don't bore it out. Get lower comp ratio and mid size turbo to help boost from 3k or 4k rpm. EZ30 can make 280bhp to 1200bhp. There's a ton of aftermarket for it, while EZ36... well, just say almost all the aftermarket shop isn't stupid enough to make parts for em.

EZ36 turbo is just Forza dream. Most people isn't stupid to turbo a ticking bomb.

H8 and so on have been done... just it put so much pressure on the crank that, it's not even worth it.

[Matador]

Originally Posted by Exage

Ideally and put very simply a de-stroked (and 1.5-1.6 rod to stroke) FB25, with a beefier/smaller cylinder bore reduced to 2.0L with a higher compression ratio (11:1-12:1). AVCS, and D-4S. Revised heads, intake and exhaust manifold, camshaft. Optimized ignition and fuel mapping.

Intruiged by this setup.

[danban]

FB 2.5 to me for sure.

[tranzformer]

The new FB20 in the 2012 Impreza now has the oil filter on the top of the engine. Wonder if the FT86 FB20 variant will use that same design. Should make oil changes a bit easier and quicker.

[Random_Art]

and slightly more messy, as that filter is sure to dump it's contents all over the block as soon as that seal is broken.

Edit, never mind. Found a pic and it looks like they planned for that with some sort of spill catch cup around the filter.

[tranzformer]

Originally Posted by Random_Art

and slightly more messy, as that filter is sure to dump it's contents all over the block as soon as that seal is broken.

Edit, never mind. Found a pic and it looks like they planned for that with some sort of spill catch cup around the filter.

Nice find on that pic! I have never owned a car with the oil filter up above, but I only assumed it would be easier and quicker. If Subaru did indeed design a catch cup around the filter as that pic shows, that would be great and hopefully solve that potential problem.