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Old 01-18-2017, 03:27 PM   #1201
Celery GT-5
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The CVT will let it make like 12psi under 2k before it bothers to shift the ratio. Also if you hit it at the wiring time, sometimes it doesn't drop ratios at all.

At least in the fxt anyway.
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Old 01-18-2017, 03:34 PM   #1202
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Originally Posted by playslikepage71 View Post
The worst thing you can do for your rods is the downpipe because of how much earlier the boost comes on.
now that is something to think about.
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Old 01-18-2017, 03:53 PM   #1203
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Quote:
Originally Posted by Celery GT-5 View Post
The CVT will let it make like 12psi under 2k before it bothers to shift the ratio. Also if you hit it at the wiring time, sometimes it doesn't drop ratios at all.

At least in the fxt anyway.
12 PSI isn't that bad. People get weird because the calculations don't line up with peoples' perceptions. Most equations take into considerations the pressure ratio, with a ratio of 1 being 0 PSIg of boost (14.7 PSIa) and a ratio of 2 being 14.7 PSIg (29.4 PSIa) or 1 bar. If you stay below a PR of 2, you're in supercharger territory, and most NA cars can handle several pounds of boost no problem. A turbo car, more so. It's when you start to get up into the PR of 2 or more that you need to worry, because cylinder pressures aren't linear to boost pressure.
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Old 01-18-2017, 04:39 PM   #1204
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now that is something to think about.
and don't forget the charge pipe.
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Old 01-18-2017, 08:19 PM   #1205
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Originally Posted by KillerBMotorsport View Post
My wife's FXT with a J-Pipe (just our front pipe) and pro-tune made ~60wtq/hp over stock and the original tranny lasted 32K miles. At 55K miles now and I'm crossing my fingers.
Wow, thats not good at all.

My wife's FXT I got tuned with the standard exhaust. Although I also got them to reduce the peak torque, they did this by reducing the boost when it first hits and then keeping full boost later on. I didnt enjoy driving it before the tune, now its great fun! The lumpy power curve of the standard tune drove me nuts.

Have only about 10K miles since the tune so will be interesting to see how the transmission lasts. The peak torque has only very slightly increased over stock (~10wtq) but the area under the curve has increased a lot and it has the full stage 1 peak power. My theory is that its the peak torque that kills the CVT but only time will tell if thats right.

How did the FXT sound with the dump pipe/front pipe but OEM catback? I heard on the WRX it sounded really bad.
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Old 01-19-2017, 09:27 AM   #1206
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stop messing with your wives' cars

are the cvts failing due to overheating or randomly under high load?
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Old 01-19-2017, 09:32 AM   #1207
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I think they just start slipping after a while. Some people say it's just the torque converter. It's a shame, because if it could take abuse it would actually be pretty decent aside from the inexplicably worse mpg.
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Old 01-19-2017, 11:36 AM   #1208
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Quote:
Originally Posted by mishapopa View Post
stop messing with your wives' cars
I... can't... stop

Quote:
Originally Posted by Celery GT-5 View Post
aside from the inexplicably worse mpg.
How bad is yours? My wife gets ~23-24 MPGs carting the kids around town and we get ~28 MPG on a fully loaded family trip
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Old 01-19-2017, 11:46 AM   #1209
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I've gotten it up to around 27 on the highway but around town it's getting 18-21. 20.2 average vs 23.6 on our 2015 WRX 6mt in similar conditions. Although it's never had the OEM tires on it. It has Michelin x-ice on the stock wheels and Goodyear eagle f1 assemetric 265/45-18 on it's summer wheels(on the subject of pointlessly modding your wife's car lol).
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Old 01-19-2017, 04:52 PM   #1210
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I need to use the gas pedal a bit more I guess...I average about 25-26mpg driving around down and running 79-80mph on a trip I'll see 31-32mpg.
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Old 01-19-2017, 05:43 PM   #1211
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Originally Posted by mishapopa View Post
stop messing with your wives' cars

are the cvts failing due to overheating or randomly under high load?
Haha but whenever we drive around together we take her car and I want to enjoy the drive
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Old 01-19-2017, 06:34 PM   #1212
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Originally Posted by wv2.5i View Post
I need to use the gas pedal a bit more I guess...I average about 25-26mpg driving around down and running 79-80mph on a trip I'll see 31-32mpg.
I think I could have gotten 31 or 32 once in the 2015 but by the time I refueled it was down to 28.9 because of a bunch of local driving
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Old 01-19-2017, 06:53 PM   #1213
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Originally Posted by KillerBMotorsport View Post
My wife's FXT with a J-Pipe (just our front pipe) and pro-tune made ~60wtq/hp over stock and the original tranny lasted 32K miles. At 55K miles now and I'm crossing my fingers.
Did it fail suddenly? Was it during a single WOT pull? Or sustained hard driving?
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Old 01-19-2017, 07:46 PM   #1214
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How did the FXT sound with the dump pipe/front pipe but OEM catback? I heard on the WRX it sounded really bad.
I think I misquoted earlier, it was more like a 25-35wtq/hp increase with the J-Pipe/Protune.

Only the J-Pipe was changed, this piece...



It didn't change the tone/volume much at all (my wife couldn't even tell a difference), the only thing you can hear is a very slight turbo sound if you're standing behind the car at cold start.
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Old 01-19-2017, 07:46 PM   #1215
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Originally Posted by Celery GT-5 View Post
I think I could have gotten 31 or 32 once in the 2015 but by the time I refueled it was down to 28.9 because of a bunch of local driving


Haha, I had entertained the idea of buying myself a forester XT for something else to drive with a j-pipe and tune to pair with the WRX, but if the CVTs transmissions are failing not interested.

On another note I am by no means an expert, but I can't believe how many people are so concerned about high load, low rpm, especially on stock cars. It's a stock, twin scroll turbo made to make boost early and provide low end tq and to say don't even get on it below 3k is ridiculous. The car very happily will pull from 2k when you have peak to so low, why even buy the FA if you aren't going to reap the benefits. Not to mention most modern cars, even turbo automatics hold gears and build boost at a low rpm.

Modded is a different story depending on what you are running, but I'm going to continue to drive it the same way and if it blows up it blows up. I didn't mod the car to watch my rpm I'm at before I got WOT.
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Old 01-19-2017, 08:06 PM   #1216
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Originally Posted by Celery GT-5 View Post
I've gotten it up to around 27 on the highway but around town it's getting 18-21. 20.2 average vs 23.6 on our 2015 WRX 6mt in similar conditions. Although it's never had the OEM tires on it. It has Michelin x-ice on the stock wheels and Goodyear eagle f1 assemetric 265/45-18 on it's summer wheels(on the subject of pointlessly modding your wife's car lol).
Damn, my STi gets about the same mpg as your fxt.
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Old 01-19-2017, 09:19 PM   #1217
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My 2011 WRX did better too
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Old 01-19-2017, 11:27 PM   #1218
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Fuel consumption on our FXT improved by about 15% after a tune.

Last edited by Harey; 01-19-2017 at 11:37 PM.
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Old 01-20-2017, 12:21 AM   #1219
Celery GT-5
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Originally Posted by wv2.5i View Post
Haha, I had entertained the idea of buying myself a forester XT for something else to drive with a j-pipe and tune to pair with the WRX, but if the CVTs transmissions are failing not interested.

On another note I am by no means an expert, but I can't believe how many people are so concerned about high load, low rpm, especially on stock cars. It's a stock, twin scroll turbo made to make boost early and provide low end tq and to say don't even get on it below 3k is ridiculous. The car very happily will pull from 2k when you have peak to so low, why even buy the FA if you aren't going to reap the benefits. Not to mention most modern cars, even turbo automatics hold gears and build boost at a low rpm.

Modded is a different story depending on what you are running, but I'm going to continue to drive it the same way and if it blows up it blows up. I didn't mod the car to watch my rpm I'm at before I got WOT.
Well I think the low rpm/high load thing is more about tuned cars with increased boost.

I just had another thought, maybe it's not that high load situations cause the damage, maybe they just accelerate the failure of an already defective/failing engine?
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Old 01-20-2017, 12:29 AM   #1220
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It's made to make boost early with the twin scroll, totally - on the stock tune at stock power levels. There's a retarded big difference between the stock boost of 15.9 lbs at 250wtq and being tuned for 19 lbs - with a quicker spool - at 350wtq. You don't have to watch your RPMs before you go WOT, but when you're pushing the car at 150-200 bhp over stock then it's probably a good idea.

And I don't think that the FA20 is a defective/failing engine - I think 5 years and a couple hundred thousand sold with very few blown up has proved it's not. Look at the reliability poll (lol), 150 responses and I think 2 of them are blown.
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Old 01-20-2017, 12:42 AM   #1221
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They don't seem to be blowing up as much anymore. It's kind of like how 02 wrxs were blowing tranny's left and right and now they don't seem to so much. Early adopter fukboiz suck at driving
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Old 01-20-2017, 01:01 AM   #1222
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Yeah hence my comments about modded cars being a different story, but my more direct reference is telling people on stock cars they shouldn't do it and it's the reason they blew up their cars. Lol The whole point of downshifting is when you need power to perform the task at hand right? If you have the power then why downshift unless you are doing it just to do it. The tq down low is meant to be used it's the whole point.

When modded the tq is the best thing about the setup. Use it, if it fails it fails.

I've stopped building my car at a level I feel is conservative, If anyone has to worry about going WOT in any situation you haven't built the car with the appropriate supporting mods.
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Old 01-20-2017, 01:04 AM   #1223
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I think that's part of it, a lot of the blown FA20s are 15s. I also think that the ECM recalls also had a big part of it, some of those 15s ran for a long time on a bad tune. But I don't think that with stock internals the FA20 can match the EJ25s power levels. It can make power sooner and easier, 300whp on a 15 is way easier then 300whp on a 14, but I don't think it's as capable holding that power past bigger torque numbers. I mean it's half a liter less displacement so it makes sense it won't hold the same power.

Obviously, the '15s are gonna have more miles/wear/etc because they've been around longer, but I think that enough 16s have gone past the mileage that 15s were breaking to see that it is reliable and does have some leeway with tuning.
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Old 01-20-2017, 01:09 AM   #1224
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Originally Posted by wv2.5i View Post
Yeah hence my comments about modded cars being a different story, but my more direct reference is telling people on stock cars they shouldn't do it and it's the reason they blew up their cars. Lol The whole point of downshifting is when you need power to perform the task at hand right? If you have the power then why downshift unless you are doing it just to do it. The tq down low is meant to be used it's the whole point.

When modded the tq is the best thing about the setup. Use it, if it fails it fails.

I've stopped building my car at a level I feel is conservative, If anyone has to worry about going WOT in any situation you haven't built the car with the appropriate supporting mods.
Two different schools of thought. LSPI and detonation and concerns on any engine going high load/high gear/low rpms. It's not good to beat the **** out of any engine, Subaru is responsible for 36,000 miles - and if you read the owners manual it'll tell you not to race the engine and drive it hard lol
I think the quick torque curve is more a selling point to make the car seem faster then anything - not so you can wot at 1900 rpms safely.
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Old 01-20-2017, 01:51 PM   #1225
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I came from the Mazdaspeed world, which was also a small turbo DI engine. Very similar characteristics in regards to what caused blow engines there. High load/boost at low RPM was a major culprit, along with using inferior oil, and the always present driver mod, which causes more blown motors than any other modification. Just my 2 cents.
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