internal gate :'(

[Optical]

This is a datalog from my car, you can see the EGBP (white) is a bit less than MAP (orange). This is good. Most turbos only like to make more power when the EGBP is less than 1.2x MAP pressure

Reasons why EGBP is higher than MAP are due to exhaust restrictions (headers, turbine housing size, post turbo exhaust), or the turbo being maxed out

[WRXONP]

Steve was telling me standard turbos run 2:1 egbp and with a back cut turbine you can get too 1:1 . but any way . 3inch makes way way way more power than 2.5 inch . . no theories straight bum in the seat and dyno sheet proof .

[Guest]

lol i have 3 inch thoe.the only thing that smaller is ther downpipe.it seems to fow 100 times better that it did before with the standard downpipe and 3'

[WRXONP]

bro you need 3 inch the whole way . as straight as possible . the least amount of back pressure . . i had 3 inch down pipe and 3 inch mid and 2.5 tail section . changing it 2 3inch the whole way made massive difference. and no matter what any one says you will make more power with external over internal . external can hold shut right until peak boost then open where internal has to start shuttling before peak so thus makes torque curve of external much sharper . more mid range . more power . only saying as this is what i saw on dyno comparing cars with external vs internal . .

[Pappu1]

does the stock internal actuater rod move in towareds the actuater or out towards the turbo???

[Guest]

 WRXONP said:

bro you need 3 inch the whole way . as straight as possible . the least amount of back pressure . . i had 3 inch down pipe and 3 inch mid and 2.5 tail section . changing it 2 3inch the whole way made massive difference. and no matter what any one says you will make more power with external over internal . external can hold shut right until peak boost then open where internal has to start shuttling before peak so thus makes torque curve of external much sharper . more mid range . more power . only saying as this is what i saw on dyno comparing cars with external vs internal . .

i beg to differ man,possum bourne told me that my exhaust setup was prt decent and no point changing it.ithink il listen to them ,

i have no reason to change it yet,my opioin it flows well.none of you have been in my car to tell how well it flows,

,and brad yeh i know iv learnt internal's are s*** no matter what is said,external all the way,bigger better newer tecnology.

[Stoffa]

hahaha internal wastegate are VERY current, and work well if set up correctly, otherwise why would the brand new technology Borg Warner EFR turbos come with internal gates? and built in blow of valves too which is pretty trick!!

Cosworth even put their name to them!!

http://www.cosworthusa.com/news/article.asp?idpage=57

[WRXONP]

i bet money on it a 3 inch down pipe will make more power than a 2.5 inch. the exhaust is key and the down pipe is the main factor . . 3 inch out flows 2.5 by miles . . like i said if you feel it in ya butt dyno its a good gain

[WRXONP]

possum bourne is long gone bro. you mean pbms ? well apparently they told you to run that junk in your air flow meter so i would never listen to what they say is true

[Stoffa]

 WRXONP said:

possum bourne is long gone bro. you mean pbms ? well apparently they told you to run that junk in your air flow meter so i would never listen to what they say is true

God your a meat head sometimes

[WRXONP]

im a meat head ? apparently pbms told Alex that a stupid fin device in his maf will make more power ? yet all it is is a restriction. . yeah im the meat head. i just tell it how i see it

[Stoffa]

ok maybe you just need to start adding IMO (in my opinion) before comments like that, PBMS are one of the most respected and experienced subaru mechanic/engineers in the country, you cant just tell everyone not to believe anything they say.

[WRXONP]

IMO Lol . . . and how well can you tel your exhaust is flowing by driving . one way to tell is with boost solenoid duty cycle . say on 50percent you had 15 Pound . you change exhaust and make more flow but leave at 50percent . and boost goes to 18Pound them you have to turn duty cycle down to say 40percent to get back to 15Pound

[Stoffa]

I changed my downpipe and got and extra 1 psi of boost just from having less restriction

[WRXONP]

exactly what i just said . . . . lol . . IMO