how much power can the 4eat handle

[racingking951]

I was going to turbo my bd but it has a auto in it, so i was just wondering how much power these things could handle before there are problems? I would like to know if im wasting my time with this and should do a swap or if i can get by with my auto.

your auto can take it

[racingking951]

ya but how much i was going to boost a ej22 with something alittle bigger than the td04 but im not really sure yet

[httrdd]

Mine is handling daily driving with the 240hp eg33 and I am not nice to it. I think you will be fine!

[racingking951]

awesome thats all i wanted to hear thanks.

[peter]

I'm wondering the same thing for the same reasons. But I took I would rather do a 5 speed swap then boost it

[racingking951]

i would rather do a swap to the 5 speed also but if my 4eat can handle the power just fine im going to stick with it. the only thing that i will loosing out on is the "fun factor" of driving a stick and being able to rev quick due to better light weight parts.

[peter]

Thats true. But It would probably be a little faster too. You'll lose less power to the wheels and the manual weighs less then the auto. It wouldn't be a huge difference but anything helps. I'll look more into how hard and expensive the swap is and then really decide what to do

[racingking951]

one more quick question is there anyway to get the around the governor or what ever it is that stops the car from going past 113mph?

[Huffer]

Standalone ECU

[aekOne]

mine certainly didn't appreciate 320hp at all. not to say it can't but mine died a loud and abrupt death


one more quick question is there anyway to get the around the governor or what ever it is that stops the car from going past 113mph?

get a speed cut defender. greddy, apexi, hks, sard etc all make them.

[STIll inspired]

i have a friend who is purposely testing the automaic transmission to see what it can take at the moment he has it seeting tuned at 285whp but he does have a stage two tune that i believe put out over 300whp but he broke those transmissions within days and went beck to stage one untill he gets it rebuilt to take more power.

[StatGSR]

^ actually built Subaru automatics can be way stronger than any subaru manual you can get (oem or aftermarket). like consistently dealing with 1000hp strong...

[Kiwi GT]

This Australian BF is still auto....

http://members.iinet.net.au/~zrinski/wags1125.wmv

http://www.youtube.com/watch?v=AnvHg6G2aMA

[aekOne]

that's actually justin's car and yes it was auto in those clips but he's converted it to manual now. wanna have a guess why?

[racingking951]

so im just going to say that a safe cut off for the 4eat would be at the most 285hp otherwise the risk of breaking something is just too much.

[Kiwi GT]

that's actually justin's car and yes it was auto in those clips but he's converted it to manual now. wanna have a guess why?

Any idea what auto he was using? Gen 1 autos won't normally light the rears like that. I suspect it may be a VTD box....

[jey]

^ actually built Subaru automatics can be way stronger than any subaru manual you can get (oem or aftermarket). like consistently dealing with 1000hp strong...

Every stock Subaru automatic I've seen blows up way before 1000 hp - I'd like to see some evidence of this claim.

[racingking951]

i think statgsr means that "built" as in rebuilt with after market internals allows them to hand that kind of power

[jey]

Got it - sounds quite impressive!

[Danny-G]

Would I be safe running about 160 chp on a stock '93 auto with about 253,500 miles, or will it die real quick?

[racingking951]

so ive been talking around town and a few of the subaru guys that i know in the city have told me that the first gen autos were not built to handle that much power and that they would more than likely fail with a turbo...

so with me owning a second gen i asked the obvious question and said what about mine?

i was told that mine could handle a turbo and that my limit was around 500hp, i didnt believe this guy for one minute but he continued to assure me that if i were to turbo my car and make around 325 to the wheels i would be fine.

has anyone heard anything like this?

[httrdd]

There is a vid from my guy on tristatetuner.com of a guy doing a brake boost launch on a 4eat and believe me the car makes some power. Let me find it.

[httrdd]

http://m.youtube.com/#/watch?desktop_ur ... MzwY&gl=US (http://m.youtube.com/#/watch?desktop_uri=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dk2TX_g5MzwY%26feature%3Dyoutube_gdata_player&feature=youtube_gdata_player&v=k2TX_g5MzwY&gl=US)

Nevermind the 4eat is built up.

[grayguy]

Search "99' Subaru Impreza Brake boost" on YouTube, my iPhone won't let me link it.

[racingking951]

My droid can play it lol

Anyways that rs is crazy for being a 4eat I guess ill do a bit of research on tranny internals and see what the cost difference is between a swap and built 4eat

[Huffer]

IPT transmissions. Check them out.

[racingking951]

I did and i really like what i see,

Performance rebuilt kit - $649
Modified valve body - $629
Torque converter - $595

They make the 4eat seem indestructible with their parts lol, but i will get the rebuild kit once my engine is done and move down the list one by one. I may not have a manual but ill have a transmission that is reliable and can handle the power.

[65pontiac]

Thats true. But It would probably be a little faster too. You'll lose less power to the wheels and the manual weighs less then the auto. It wouldn't be a huge difference but anything helps. I'll look more into how hard and expensive the swap is and then really decide what to do


im curious about this. I know the 4eat weighs more than a 5speed would. but 5 speeds =50/50 split correct, or something very close?

the autos are 90/10 unless your in 1 and 2. so would that mean the auto will put down more power due to less drivetrain loss??


my friends RS put down very close to 140whp with a 3 inch cat back and header. he did a 5 speed swap so he doesnt have the same diffs as a factory 5speed car. (ill see i can find the graph)

but i think if it was a factory 5speed car it wouldve put down less than a 4eat or a swapped 4eat with auto diffs.

does any of this make sense?? :neutral:


sorry about the necropost :oops:

[Wiscon_Mark]

the autos are 90/10 unless your in 1 and 2. so would that mean the auto will put down more power due to less drivetrain loss??

No, Subarus don't disconnect the rear diff, so there would still be parasitic loss in the drivetrain even at 90-10. They don't go 100% any way unless you use the FWD fuse, which isn't for anything but towing. And the 90-10 does change front --> back if there is slip, it's not just D1 and D2 that they send power back.

And actually, automatics don't put as much power down until they lock the torque converter, so you should get less power on a 4EAT nearly all the time.

Add the extra weight to that, and no, a 4EAT isn't ideal.

[65pontiac]

Thanks that does make sense

[tnrknght]

I saw mention of the fwd fuse? I have seen it and only used it when i blew a tire in the rear and used a borrowed spare. How would fwd be better for towing than awd?

[peter]

I saw mention of the fwd fuse? I have seen it and only used it when i blew a tire in the rear and used a borrowed spare. How would fwd be better for towing than awd?
Meant to be used when your vehicle is being towed. The awd system can get damaged if you tow the car without using the fwd fuse

[Wiscon_Mark]

How would fwd be better for towing than awd?

It disconnects the center diff so you can tow with something other than a flatbed - it's for towing the vehicle, not towing with it.

[tnrknght]

Oh yea duh okay. I knew that I was thinking as far as pulling a car with the subie. I understand how itd damage to have 2 wheels rolling, I saw it happen to a mitsu gsx. Not fun.

Stupidity leak quarantined, please carry on :smt021

[slaytalera]

As far as drivetrain loss, i remember reading that legacy autos are a full second slower to 60 then manual legacys, but they can handle up to around 280whp, manuals cant handle much more then stock.

As far as torque split, it is in fact 90/10 front rear, but when locked in first or second the center diff locks at 50/50, which is probably how that 1st gen legacy was able to smoke the rears when brake boosting

[grayguy]

When my wife's WRX (4eat w/ big torque inverter) got tuned a few weeks ago the tuner said it's about 5-10% loss on average, around 10-20hp was his guess....

That being said he also said her wrx was at the upper limit of what the 4eat/big converter should safely be DD'd at if your gonna beat on it a lot around 300whp