SubaruFanatic Posted June 30, 2010 Share Posted June 30, 2010 its 21lbs of target boost on romraider possible on a stock vf40 turbo? i was hitting a constant 16lbs in 3rd gear when I did a pull. Just wondering if thats ok for the car or not... oh another question is is possible that the stock bov leaks under high pressure because when i was pulling at the end of 3rd gear i heard a loud wind sound that sounded like i blew a hose off but then everything went back to normal Link to comment Share on other sites More sharing options...
RJS5689 Posted June 30, 2010 Share Posted June 30, 2010 That's quite a bit of boost to run through these stock turbos. I guess it all depends on how reliable of a tune you want. Link to comment Share on other sites More sharing options...
McDowell Performance Tunin Posted June 30, 2010 Share Posted June 30, 2010 Even if you did hit high of boost in first, our gearing is so short that it wouldn't do much, except burn up your clutch and put a ton of stress on our small stock turbo www.facebook.com/mcdowelltuning [sIGPIC][/sIGPIC] Click Here for Stage1, Stage2 and Stage3 Tuning and eTuning Info Link to comment Share on other sites More sharing options...
biz77 Posted June 30, 2010 Share Posted June 30, 2010 First issue is these turbos should really not be pushed much past 18 psi at sea-level. Second issue is that first gear is too short to get the turbo spooled in the area of the powerband where it MAY be able to make that kind of manifold pressure: 3,000 - 4,500 RPM. What are you trying to accomplish? Link to comment Share on other sites More sharing options...
rao Posted June 30, 2010 Share Posted June 30, 2010 You will not generate enough load to produce that much boost in 1st gear /thread Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
Spec B Posted June 30, 2010 Share Posted June 30, 2010 You could target it, but you will not hit it. Link to comment Share on other sites More sharing options...
SubaruFanatic Posted July 1, 2010 Author Share Posted July 1, 2010 yeah thats what my original post was that my target boost in 1st gear was 21 not that I was hitting 21 I'm getting a tru boost gauge this weekend and that way I can control the boost right now I have a stock boost controller which is probly shit Link to comment Share on other sites More sharing options...
biz77 Posted July 1, 2010 Share Posted July 1, 2010 You're not going to hit 21 psi in first gear, nor should you be targeting 21psi in any gear. The stock boost control system works just fine, IF you know what you are doing with it. Link to comment Share on other sites More sharing options...
Mega Users LieutenantDan Posted July 1, 2010 Mega Users Share Posted July 1, 2010 This thread has win written all over it Link to comment Share on other sites More sharing options...
McDowell Performance Tunin Posted July 1, 2010 Share Posted July 1, 2010 Yeah, I would just have it closed, if I were the OP... www.facebook.com/mcdowelltuning [sIGPIC][/sIGPIC] Click Here for Stage1, Stage2 and Stage3 Tuning and eTuning Info Link to comment Share on other sites More sharing options...
Boostin1657615274 Posted July 1, 2010 Share Posted July 1, 2010 yeah thats what my original post was that my target boost in 1st gear was 21 not that I was hitting 21 I'm getting a tru boost gauge this weekend and that way I can control the boost right now I have a stock boost controller which is probly shit the AEM Tru Boost is an open loop solenoid driver with a MAC 3 port solenoid. I've used it. There's a base solenoid duty value and a "spring" value which just tells the solenoid when to drop the duty cycle down to allow the wastegate to open. There are no correction tables for changes in ambient temperature or other such things. You could have just installed a 3 port EBCS and set all your proportional and integral turbo dynamics tables in the factory ECU to 0. Then you can control everything in open loop with the duty cycle tables. If you want 21psi in 1st, disconnect the wastegate. On the search for a new DD... Link to comment Share on other sites More sharing options...
SubaruFanatic Posted July 1, 2010 Author Share Posted July 1, 2010 the AEM Tru Boost is an open loop solenoid driver with a MAC 3 port solenoid. I've used it. There's a base solenoid duty value and a "spring" value which just tells the solenoid when to drop the duty cycle down to allow the wastegate to open. There are no correction tables for changes in ambient temperature or other such things. You could have just installed a 3 port EBCS and set all your proportional and integral turbo dynamics tables in the factory ECU to 0. Then you can control everything in open loop with the duty cycle tables. If you want 21psi in 1st, disconnect the wastegate. I'm not saying i want 21 psi in first gear whats the point of that anyway. I am just saying that If i was hitting that high in 1st why couldn't I hit that high in 3rd or 4th Link to comment Share on other sites More sharing options...
Mega Users LieutenantDan Posted July 1, 2010 Mega Users Share Posted July 1, 2010 This is confusing.... Link to comment Share on other sites More sharing options...
lucas569 Posted July 1, 2010 Share Posted July 1, 2010 id imagine youd pop the oem tmic at that level. Link to comment Share on other sites More sharing options...
McDowell Performance Tunin Posted July 1, 2010 Share Posted July 1, 2010 Probably, along with other issues. Your car is not ment to peak in first gear, so I'm not sure what the really question is? If you were at 21psi in first, you'd be even higher in the other gears. If you want to be boosting that high, you need more than the stock IC and turbo, to be safe. www.facebook.com/mcdowelltuning [sIGPIC][/sIGPIC] Click Here for Stage1, Stage2 and Stage3 Tuning and eTuning Info Link to comment Share on other sites More sharing options...
BennnGeee Posted July 1, 2010 Share Posted July 1, 2010 its 21lbs of target boost on romraider possible on a stock vf40 turbo? i was hitting a constant 16lbs in 3rd gear when I did a pull. Just wondering if thats ok for the car or not... oh another question is is possible that the stock bov leaks under high pressure because when i was pulling at the end of 3rd gear i heard a loud wind sound that sounded like i blew a hose off but then everything went back to normal 21 lbs of boost = ping ping ping pop pow pooooff You should buy my boost controller lol Link to comment Share on other sites More sharing options...
SubaruFanatic Posted July 2, 2010 Author Share Posted July 2, 2010 what boost controller is that?? And I dont have a stock TMIC. And Why would my car ping i have a tune and zero knock Link to comment Share on other sites More sharing options...
j255c Posted July 2, 2010 Share Posted July 2, 2010 u need launch control/anti-lag to generate enough load to produce this boost in 1st gear. Your gearset will assplode and ur block will melt to pieces. Go for it! 06 TB EVO IX SE stock turbo monster subaru hater Link to comment Share on other sites More sharing options...
SubaruFanatic Posted July 3, 2010 Author Share Posted July 3, 2010 u need launch control/anti-lag to generate enough load to produce this boost in 1st gear. Your gearset will assplode and ur block will melt to pieces. Go for it! sounds good I need a ej257 anyway Link to comment Share on other sites More sharing options...
Mega Users LieutenantDan Posted July 3, 2010 Mega Users Share Posted July 3, 2010 More Win! Think an EJ257 will net you gains all day and we will be none the wiser:cool: Can I have your inferior legacy block when you swap them out? Link to comment Share on other sites More sharing options...
SubaruFanatic Posted July 5, 2010 Author Share Posted July 5, 2010 yeah but that ej257 wont be for a little while my clutch just decided to start slipping so thats next before turbo Link to comment Share on other sites More sharing options...
keithk831 Posted July 5, 2010 Share Posted July 5, 2010 If you were at 21psi in first, you'd be even higher in the other gears. x2 Link to comment Share on other sites More sharing options...
dmanaenk Posted July 5, 2010 Share Posted July 5, 2010 dibs on blown shortblock. 666 Link to comment Share on other sites More sharing options...
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