Worcester/Boston Social Thread
you have an intake temp sensor that is used to trim timing i believe. i don't know about boost.
on the subaru, there were compensations for most everything (barometric pressure, intake air temp, etc). a lot of them weren't even used from the factory if that's any indication of how complex the subaru ecu is. those are independent of the coolant temp compensation maps.
albeit one of the most sophisticated ecus, subaru's achillies heel is the fact that the IAT sensor is pre turbo, whereas it should ideally be post-intercooler.
on the subaru, there were compensations for most everything (barometric pressure, intake air temp, etc). a lot of them weren't even used from the factory if that's any indication of how complex the subaru ecu is. those are independent of the coolant temp compensation maps.
albeit one of the most sophisticated ecus, subaru's achillies heel is the fact that the IAT sensor is pre turbo, whereas it should ideally be post-intercooler.
yeah the X has the funky boost control system the JDM evos came with. It has two boost control solenoids and a PID setup just like the subaru. It is pretty robust actually even though it is still effed up like the IX system was. There is a pil and a line directly connected to the WG. Which is safe but it doesn't utilize the system they implemented at all.
yeah the X has the funky boost control system the JDM evos came with. It has two boost control solenoids and a PID setup just like the subaru. It is pretty robust actually even though it is still effed up like the IX system was. There is a pil and a line directly connected to the WG. Which is safe but it doesn't utilize the system they implemented at all.
And MBC is easy, it just opens at a certain pressure level and opens the WG. It is dumb. The stock boost control can do lot of things an MBC cant. SOME MBCs can hold boost better than the stock 2 port but a 3 port boost control solenoid will hold boost better. there are a couple of well put together tests in the ECUflash forum that proves this. Another problem is no one, in the evo world, has access or experience tuning a PID boost system on an evo so most dont. I am sure some of the suby experienced guys could easily figure it out.
Feel free to post on the X forums if you want...I just didnt do that cause I wasnt sure if you'd be cool with that or not
Haha, thanks Kenny, I will be doing it as a paid hobby soon, once I get my website up and running....so pass the word if anyone you knows wants pics of their car,etc taken....
Feel free to post on the X forums if you want...I just didnt do that cause I wasnt sure if you'd be cool with that or not
Feel free to post on the X forums if you want...I just didnt do that cause I wasnt sure if you'd be cool with that or not
On a side note: Any time Ive posted pics of my car ive gotten rid of the license plate number. I dont really get why tho. Some ppl do, some ppl dont. What does it really matter? Just so ppl cant track you down or something?
Last edited by KGHtheII; Oct 7, 2008 at 07:50 AM.
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Yeah I don't think it really matters. I think people do it just to be safe.
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And MBC is easy, it just opens at a certain pressure level and opens the WG. It is dumb. The stock boost control can do lot of things an MBC cant. SOME MBCs can hold boost better than the stock 2 port but a 3 port boost control solenoid will hold boost better. there are a couple of well put together tests in the ECUflash forum that proves this. Another problem is no one, in the evo world, has access or experience tuning a PID boost system on an evo so most dont. I am sure some of the suby experienced guys could easily figure it out.
1 - you don't have to run full boost at part throttle. this gives the car a more N/A feel and doesn't make it as twitchy
2 - you can choose how to ramp boost up under different conditions and smooth out the transitions as boost approaches target to not make the car so jerky.
an mbc is certainly easier, but i think it's well worth the investment to tune boost. i would say 60-75% of the time i would spend tuning would be getting boost down. fueling and timing is pretty braindead. then you have cam timing which is another whole story in and of itself. most people don't understand the relationship between EGBP, dynamic compression and what kind of intake charge you get.
I always do it man, you'd be VERY surprised what people can get on the net....all takes is a plate number to find out where your car is parked at night..and if people have the right connections ( as I do ) I can get that info in a matter of minutes....so it's better to be safe
I may be heading down to CT tonight to swap wheels with this kid. Is anyone interested in any other parts he has?
https://www.evolutionm.net/forums/sh...d.php?t=373787
https://www.evolutionm.net/forums/sh...d.php?t=373787
an mbc is certainly easier, but i think it's well worth the investment to tune boost. i would say 60-75% of the time i would spend tuning would be getting boost down. fueling and timing is pretty braindead. then you have cam timing which is another whole story in and of itself. most people don't understand the relationship between EGBP, dynamic compression and what kind of intake charge you get.
Meh, people can see your plate when you drive around...
None of us have anything exotic enough to have a "Gone in 60 Seconds" crew staking us out.
I usually clear the plate numbers just to make it look a little cleaner... let me know if you want me to take down your pics from the other night, Kenny.
Paul, at some point I'd still really like to get a PS rundown from you... I wasted so much time Sunday night trying to figure it all out...
None of us have anything exotic enough to have a "Gone in 60 Seconds" crew staking us out.
I usually clear the plate numbers just to make it look a little cleaner... let me know if you want me to take down your pics from the other night, Kenny.
Paul, at some point I'd still really like to get a PS rundown from you... I wasted so much time Sunday night trying to figure it all out...