Jonathan's 2010 X GSR Jestr Tuned!!!
Dec 31, 2009, 08:52 AM
#17
Newbie
Join Date: Dec 2009
Location: chicago
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
the boost drop is probably the stock turbo / boost controller/ wastegate. All stock evo do that , i dont think it is a leak john. My brother x make 350hp/350tg similar mods to u minus downpipe and wastegate actuator. max boost is like 25psi droping to 19psi up top.
Dec 31, 2009, 09:53 AM
#18
Evolved Member
iTrader: (1)
Join Date: Aug 2009
Location: Saint Paul
Posts: 1,468
Likes: 0
Received 0 Likes
on
0 Posts
If you install an EBCS and upgrade the wastegate actuator then you can hold a couple more psi at the top but it's probably not worth the money...the turbo just doesn't have that much breath.
Last edited by mlomker; Dec 31, 2009 at 09:57 AM.
Dec 31, 2009, 11:59 AM
#21
Evolved Member
Thread Starter
iTrader: (10)
Join Date: Mar 2005
Location: Pembroke Pines FL
Posts: 652
Likes: 0
Received 0 Likes
on
0 Posts
That varies with the quality of your fuel. Usually 25-26 and tapering with 93 octane but you can go 29-31 on E85. The stock turbo will only spike to 31 at low rpms and then taper very quickly...which is why my tune is 29 tapering to 18.
If you install an EBCS and upgrade the wastegate actuator then you can hold a couple more psi at the top but it's probably not worth the money...the turbo just doesn't have that much breath.
If you install an EBCS and upgrade the wastegate actuator then you can hold a couple more psi at the top but it's probably not worth the money...the turbo just doesn't have that much breath.
Dec 31, 2009, 12:36 PM
#23
Evolving Member
iTrader: (4)
Join Date: Aug 2009
Location: San Jose, CA
Posts: 475
Likes: 0
Received 0 Likes
on
0 Posts
Could be the WGA? I had the same issue, boost leak tested the system (which ended up damaging the turbo) and found nothing. Last thing we think it may be is the FORGE WGA. In my situation we figured out the boost leak was present by data logging as well as during the tune the need to run far too much duty cycle to keep the turbo making boost up top.
Jan 4, 2010, 06:03 PM
#27
Account Disabled
Join Date: May 2008
Location: new york
Posts: 435
Likes: 0
Received 0 Likes
on
0 Posts
Could be the WGA? I had the same issue, boost leak tested the system (which ended up damaging the turbo) and found nothing. Last thing we think it may be is the FORGE WGA. In my situation we figured out the boost leak was present by data logging as well as during the tune the need to run far too much duty cycle to keep the turbo making boost up top.