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Sti timingbelt for Legacy?

Posted: Sun Apr 11, 2004 4:30 am
by Crusher
Hi all.
Anyone know about a Sti timingbelt for Legacy?
Anyone know if a timingbelt from a Impreza would work? I´ve found this: http://mastrowrx.com/index.asp?PageActi ... &ProdID=99
I really need a stronger timing belt than the stock and it would be great if I could get it inside EU. :)

Posted: Sun Apr 11, 2004 4:43 am
by THAWA
It should work assuming you've got DOHC heads. But don't blame me if you bend a valve :D

just kidding, I don't see why it wouldn't work, I assume the crank sprocket has the same amount of teeth on all ejseries engines. Otherwise I dont know how people put dohc heads on ej22t's.

Posted: Sun Apr 11, 2004 4:50 am
by vrg3
Well, I can tell you that the factory service manual section for the 2002 US-market WRX timing belt replacement looks pretty much the same as that for the 1994 Japan-market WRX, including the tooth counts between marks and such.

So, I think that STi timing belt would fit your engine, since it fits the 2002 US-market WRX.

Posted: Sun Apr 11, 2004 5:19 pm
by Crusher
Sounds good. I´ll try it.

THAWA: Yes I have DOHC or should I say DDOHC :)

Posted: Sun Apr 11, 2004 5:24 pm
by THAWA
Whats DDOHC?

Posted: Sun Apr 11, 2004 5:35 pm
by vrg3
Dual dual overhead cams maybe? Since there's two pairs of camshafts?

Posted: Sun Apr 11, 2004 6:57 pm
by Matt Monson
Did it occur to anyone that he could use an STi timing belt from an early WRX, like a v1 or v2?

Also,
Why on earth would you need a "stronger" timing belt? this just do not make sense. The only thing I can think of is you are running both a lightweight underdriven pulley and a superlight weight flywheel and are having problems? Read this, if that is your set up:
http://www.spdusa.com/pulley_kit.htm

Posted: Sun Apr 11, 2004 7:11 pm
by vrg3
I think the question was whether the "new" and "old" STi timing belts were the same.

From what I gather, the purpose of the stronger STi cambelt is to avoid the situation where excessive torque at the crank causes the belt to stretch slightly, which slightly changes valve timing in an unpredictable way.

Posted: Sun Apr 11, 2004 8:56 pm
by NICO
i am with vrg3 on this one just change the belt sooner, if you can break your belt then you must have some series problems or your makeing 2000hp, my car is fast and i got 600thousand ks and i have never had this happen.

Posted: Sun Apr 11, 2004 11:53 pm
by Crusher
Ok, if you say so. I´m just so afraid that when I´m going over 16psi then things will break and when the timingbelt goes then it´s not going to be cheap to replace everything, so putting a STi belt would make me sleep better at night :)

THAWA: yep, 4 cams there is.

Posted: Mon Apr 12, 2004 9:51 am
by aspect
well, there's not really THAT much load on the belt...it doesn't drive anything but the cams...

Posted: Mon Apr 12, 2004 3:32 pm
by THAWA
and the waterpump :D

Posted: Mon Apr 12, 2004 5:21 pm
by Crusher
Hmm.. ok guys but if it isn´t so much load on the belt then why is there a stronger one for sale? ;)

Posted: Mon Apr 12, 2004 5:27 pm
by THAWA
probably the same reason there's all that other sti stuff for sale, like the radiator cap, engine and tranny mounts etc. Sure they help a lil bit but I dont think anyone is getting more torque or hp from a stiffer tranny mount :)

Posted: Mon Apr 12, 2004 5:30 pm
by THAWA
hmm, that's nt really what i meant, lemme rephrase that, I don't think anyone would say sti mounts are vital at high hp/tq levels, knwo what I mean. Like the stock stuff is more than good enough but sti is better sort of thing.

Posted: Mon Apr 12, 2004 10:11 pm
by Brat4by4
I'm sorry, but you have no idea what the heck you are talking about Thawa. The engine and tranny mounts take lots of twisting motion (aka torque). The more power you have the more twist and pitching. Once your engine and tranny start twisting stuff comes out of line... like the engine, gear box and driveshaft. Steeper angles on driveline stuff doesn't help anything... including horsepower. You must have never felt a stock tranny mount, it's like foam next to a STi mount. I could see my shifter move up and down and side to side under changing amounts of power and had serious gear issues with stock mounts. After I had those changed, my tranny issues pretty much went away and my car felt ridiculously better, went faster, and shifted quicker.

STi makes their stuff for a reason (unless it's a keychain). The reason for the heavy duty timing belt, I don't know. If it's Group N, it's probably for rally racers and much harsher conditions for the belt. If it's Spec-C then it helps you get more performance safely out of your everyday driven car.

Posted: Tue Apr 13, 2004 2:40 am
by Crusher
Mhm.. Well that´s why I want a stronger belt, safety, I drive my car pretty hard and I don´t want to change the belt so often to be on the safe side and the STi belt costs as much as a stock belt here in Sweden, that´s without the customs fee and postage so finding this belt and other fun stuff inside the EU would be fine. :)

Posted: Tue Apr 13, 2004 5:21 am
by NICO
maintain your factory parts change them more often, about the tranny mount change them more often as well.

brat4by4 when was the last time you changed your tranny mount, how many times do you change it in a year.

Posted: Tue Apr 13, 2004 2:49 pm
by Legacy777
brat......I think you are the one who doesn't know what he's talking about....

I agree that yes there is a big difference between sti and non-sti engine & trans mounts.....I've felt them, and feel the difference every day i drive my car......

The timing belt on the other hand.....is an integral part of the engine.....would you seriously see subaru making a "softer" timing belt for the "street".......the timing belt felt pretty damn stiff and rigid to me....even the old one I took off after 60k miles.

IMO an sti t-belt is simply marking bull shit!

Posted: Tue Apr 13, 2004 3:37 pm
by Brat4by4
Like I said, as far as I know, STi doesn't make anything for marketing purposes unless it is on a shirt or ballcap. If it's Group-N it's for professional racing, not really for street cars. Of course some racing parts are overkill for the street. Don't forget that it is the VENDORS that market STi stuff to the customer, not STi itself. STi is not APC.

Posted: Tue Apr 13, 2004 5:41 pm
by Legacy777
this is true........but I still don't think any of us need to worry about needing an sti t-belt......

Posted: Tue Apr 13, 2004 7:31 pm
by evolutionmovement
I've heard of lots of people easily running stock belts for double the service interval, so I think they're pretty tough, but if they're the same price I can't see it hurting to use the STI one.

Steve

Posted: Wed Apr 14, 2004 12:27 am
by Crusher
Yeah, the stock belt isn´t bad at all. I haven´t changed it for 160 000 Km(99400miles I think) hard driving *shame on me* and know that they really can take a beating. We´ll see what I find.

Posted: Thu Apr 15, 2004 5:18 am
by Aerotech
So what is the recomended change interval for the STI belt, and what is it for the stock BC-BF belt? I thought I read somewhere that the new cars had longer service intervals.....

Posted: Thu Apr 15, 2004 9:54 pm
by NICO
i had factory timeing belt on for 4 years and 400.thousand ks and i just changed it cuz i put new pistons in