do i need a bigger wastegate or different boost controller?
do i need a bigger wastegate or different boost controller? Ive got an older silver faced turbosmart eboost controller and the speed shop i have been taking it too that is very reputable (RMCR) has the boost controller set to no more then 12 psi. Soo I drive it for a week and it never gets over 12 psi, then today i hit a 4th gear highway pull and see 16 psi!!! Not good for my forged lt1 but i cant for the life of me find an owners manual for one of these! whats causing this to happen? I cant get over 10 psi in second with my current sucky gears so im stumped..I just dont want to start tinkering with the up and down button before talking to people on here. We all know how easy it is to pop a motor now days
Last edited by My2kz28; Mar 28, 2012 at 08:02 AM.
what does the shop say? tough ****?
eb1's instructions:
http://www.yariksteel.ru/manual/Skyl...OOST-40-60.pdf
eb1's instructions:
http://www.yariksteel.ru/manual/Skyl...OOST-40-60.pdf
I took it back to them and they adjusted it, lowered the over boost, and it stayed at 12 for a while but now shes creepin up to 14-16 again but only in 4th and 5th..said it could be the wastegate but wanted to troubleshoot what else it could be before getting into changing the wastegate tubing. They are busy as hell over there so thought id get some more opinions on here..was also hoping someone would provide what you just did mightymouse!
is the gate vented to atmosphere? if not can you?
also what is the exhaust system after the turbo? can you close it up (e-cutout) and try again?
if either of those things affect your boost, then your gate is either not operating well (sticking) or undersized.
turbosmart has a couple different plumbing options for the solenoid, i believe one is specific to helping with creep.
i have a 42mm gate and with the exhaust capped up it can hold 11psi boost with the gate external but with the exhaust dumped/opened minimum boost goes to 13. thats with a 10lb spring.
also what is the exhaust system after the turbo? can you close it up (e-cutout) and try again?
if either of those things affect your boost, then your gate is either not operating well (sticking) or undersized.
turbosmart has a couple different plumbing options for the solenoid, i believe one is specific to helping with creep.
i have a 42mm gate and with the exhaust capped up it can hold 11psi boost with the gate external but with the exhaust dumped/opened minimum boost goes to 13. thats with a 10lb spring.
Trending Topics
is the gate vented to atmosphere? if not can you?
also what is the exhaust system after the turbo? can you close it up (e-cutout) and try again?
if either of those things affect your boost, then your gate is either not operating well (sticking) or undersized.
turbosmart has a couple different plumbing options for the solenoid, i believe one is specific to helping with creep.
i have a 42mm gate and with the exhaust capped up it can hold 11psi boost with the gate external but with the exhaust dumped/opened minimum boost goes to 13. thats with a 10lb spring.
also what is the exhaust system after the turbo? can you close it up (e-cutout) and try again?
if either of those things affect your boost, then your gate is either not operating well (sticking) or undersized.
turbosmart has a couple different plumbing options for the solenoid, i believe one is specific to helping with creep.
i have a 42mm gate and with the exhaust capped up it can hold 11psi boost with the gate external but with the exhaust dumped/opened minimum boost goes to 13. thats with a 10lb spring.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Apply a little logic.
It was running fine ( albeit only for a week ). Now it isnt. So clearly the w/g hasnt suddenly got too small if it was fine for a week.
Check all hoses to ensure none are loose or leaking.. Check the boost control solenoid is working and not clogged with oil or something
Also, turn the boost controlled off and try it. You should get w/g pressure only whatever spring is in there.
It was running fine ( albeit only for a week ). Now it isnt. So clearly the w/g hasnt suddenly got too small if it was fine for a week.
Check all hoses to ensure none are loose or leaking.. Check the boost control solenoid is working and not clogged with oil or something
Also, turn the boost controlled off and try it. You should get w/g pressure only whatever spring is in there.
Teching In
Joined: Feb 2011
Posts: 43
Likes: 0
If boost continues to climb in upper RPM's in 4th and 5th gear, the gate is not flowing enough to control the turbo speed = boost.
I think that was sound advice though from Stevie. All other things being equal; if the setup was working fine before and now it's not. Perhaps you can just throw a small spring in there and run it right off the gate. If it over runs the spring and goes back to 16psi that's your answer.
