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2008 Forester XT Limited
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Discussion Starter #1
about my recent drive in Stan T's Foz (Which was absolutely incredible) and told him I was really looking into going the same route, as far as engine mods etc. A little information on the co-worker a bright man and an avid car and motorcycle enthusiast. He does know his way around a vehicle, more than I do at least. So I was telling him how crazy the power was and felt. He asked exactly what I was considering doing to my car. I told most likely I am going to upgrade the turbo, tmic, downpipe/ehaust(still unsure of setup) and a tune. He cuts me off (LOL, which he does he gets really over the top on a casual conversation) and tells me there is nothing to tune. There's no carburetor ( and some other stuff but I usually TUNE him off at this point) there's nothing to tune, he exclaimed. I was like OK. He says "when you start bringing in more boost into the system you increase compression, and you are looking for trouble. I hope you have $5,000.00 for a new engine, buddy?" ...yakkety shmakkety blah blah blah(LOL).
He also said "You better do your homework first and not just listen to a few of your buddies on the internet. So, inside I am cracking up, but unfortunately I have no real defense as I am SUPER new to engine mechanics, do's and don'ts and modifications. I told him I would do my homework, but only to end this conversation pronto! It's funny he really gets himself worked up over nothing, something I want to do to something I won, like he's my Dad or something.
So, I do understand that modding and engine will decrease the life of an engine. If I wanted to upgrade my turbo to a VF39, STi tmic, down pipe/exhaust upgrade and a tune from a reliable person, what kind of risk am taking? Also, do I, a MY08 turbo have the same engine as an STI? A 2.5l
Thanks for reading....
:chair:
 

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1998 Forester
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602 Posts
You probably have some risk of trashing your transmission as the new power may be too much when it engages.....especially if you like hard starts or drag at tha track.
 

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2015 Outback Limited
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1,542 Posts
You'll be fine as long as you don't do anything crazy. Taking it to STI levels of power, or anything just over that, should be fine on stock internals. He is probably just not familiar with your car or it's potential. I'd just let him believe what he wants. But yeah, the big thing you'll have to watch out for is the transmission. No pulls on 5th gear! Haha.
 

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Sounds like he is pretty old school by saying there isnt anything to tune w/o a carb. Meaning....he doesnt know cars newer than 80's vintage;)

One thing I agree with is...do your homework. The mods you list are pretty common and really wont stress the engine anymore than turning up the boost a bit on the TD04.
 

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Premium Member
98 Forester...what else
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5,748 Posts
Well, Stan T should take him for a little ride - or you can bring us down for a demonstration in our OLD, 13x,xxx mile on it Forester - and one quick demonstration on the 280-bahn should shut him up very quickly.

In all honesty, tell him that while you appreciate his opinion, that you understand the principles of tuning have changed to working with the electronics, understanding air-fuel ratios, and that there are specialists here in the Bay Area who work on these cars all day long.

Bring him along to the install day, and he can meet a bunch of owners who have the same setup - take a look at the odometers...

...then tell us we're all wrong, and how our motors will blow up.
 

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2015 VW Golf R (AWD!) DSG (Automated Manual)
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2,199 Posts
Well, him being a know-it-all dweeb aside, you should mention the fact there is HUGE aftermarket support for these subaru engines with dozens if not hundreds vendors, shops, tuners, etc and a very LARGE knowledgebase of what works and doesn't. And that you know as long as you do your homework you won't have problems, just introduction of other slight risks (as noted above).

Tell him it's not like adding a turbo/sc to some crappy 4-banger and NOT having it tuned (which kills air/fuel ratios = detonation = blown engine). These engines were made for boost and you just have to know how to TUNE them. NOT TUNING would be the mistake.

I'm sure he'll know better than you though :p
 

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2008 Forester XT Limited
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1,956 Posts
Discussion Starter #7
Well, Stan T should take him for a little ride - or you can bring us down for a demonstration in our OLD, 13x,xxx mile on it Forester - and one quick demonstration on the 280-bahn should shut him up very quickly.

In all honesty, tell him that while you appreciate his opinion, that you understand the principles of tuning have changed to working with the electronics, understanding air-fuel ratios, and that there are specialists here in the Bay Area who work on these cars all day long.

Bring him along to the install day, and he can meet a bunch of owners who have the same setup - take a look at the odometers...

...then tell us we're all wrong, and how our motors will blow up.
LOL.:)
 

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2008 Forester XT Limited
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Discussion Starter #8
I have talked to so many people and I wasn't worried. It was more for argument purposes, incase I travel that same road again with him. I wanted to be more prepared.
I can't wait until I get to that stage..
 

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Premium Member
98 Forester...what else
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Eh, just another old school muscle head that can't stand imports or anything with 4 cylinders for that matter. Thats what it sound like to me at least.
My guess is he was rooting for Vin Diesel in his latest Fast & Furious movie.
 

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NA No more! :(
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An NA outback I'm guessing? He's probably thinking about high the compression is on his NA engine and thinking you can't get much out of yours either, not knowing the differences.
 

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2017 VW Golf SportWagen 5MT
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Does he know your car is already turbocharged? He is right about the dynamic compression ratio increasing with more boost. You are cramming air in a 2.5 liter engine, when you hit one bar (14.5 psi) you've doubled the amount of air your engine can naturally "fit", so it's sorta like your engine grew twice the size into a 5 liter. Anyways, the info he is missing is that these engines are designed to handle STi levels of power and even above, the stock STi's internals are basically the same as far as materials go.

I am not sure what he means by "there is nothing to tune", stock ECU programming is not capable of adjusting to a different turbo. Turbocharging his N/A Outback is not a good idea, but our cars are designed for it, so as long as you are sane driving them they should last.

That said, you will be voiding your warranty and technically the exhaust mods are illegal, so keep that in mind also. Ask him if he is a cop just to cover your a** :icon_biggrin:

Stan
 

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NA No more! :(
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Ask him if he is a cop just to cover your a** :icon_biggrin:

Stan
LOL that's a good idea. My former manager in the FAA turned out to be a part time cop. Found out while telling him about illegal stuff my friends were doing. Hahaha
 

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The Sub kit guy
2005 Forester X & XT VF39
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I've talked to a few "old school" muscle car guys that don't seen to understand cars are now controlled by computers. Programs actually monitor and control a car, and when you swap parts you need give the computer a new program to understand it. Swapping car parts isn't really much different than upgrading or adding new hardware to a PC. You need a program designed to run it properly. Some people just don't get it.
 

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Pleiads' biggest leghumper
04's 2 FXT's.
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Get it the way you want it & then take him for a drive.


joe r
 
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