Wastegate Upgrade
07-10-2009, 06:04 PM
#1
Pro
Thread Starter
Wastegate Upgrade
My mechanic just changed out a LR dual port wastegate from 5 years ago with a Tial 38mm.
I have an AEM electronic boost controller on the car. With the old wastegate, boost was constantly fluctuating (spiking) and topping out at 17 psi with current settings. After the upgrade, boost levels are stable and top out 15.5 psi. The missing 1.5 PSI of boost is noticable. However, to increase the lifespan of the motor, I plan to stay at 15.5 psi. (More power than I need anyway.)
Was the LR unit that I replaced worn-out (5+ years) or is the Tial unit better designed?
After I get the smogged in August, I plan to install a JME camshaft and stiffer valve springs. (The cam and springs have been sitting in my garage for 8 months.) I will do a dyno tuning session at that point. I am assuming more stable boost will allow a more accurate tune, correct?
I have an AEM electronic boost controller on the car. With the old wastegate, boost was constantly fluctuating (spiking) and topping out at 17 psi with current settings. After the upgrade, boost levels are stable and top out 15.5 psi. The missing 1.5 PSI of boost is noticable. However, to increase the lifespan of the motor, I plan to stay at 15.5 psi. (More power than I need anyway.)
Was the LR unit that I replaced worn-out (5+ years) or is the Tial unit better designed?
After I get the smogged in August, I plan to install a JME camshaft and stiffer valve springs. (The cam and springs have been sitting in my garage for 8 months.) I will do a dyno tuning session at that point. I am assuming more stable boost will allow a more accurate tune, correct?
07-10-2009, 06:39 PM
#3
Three Wheelin'
Whether it was worn out or not is something that you could assess under boost. If you note the boost remains stable at whatever boost level you have set then your wastegate is doing its job.
07-10-2009, 08:50 PM
#4
Pro
Thread Starter
I am still curious about if this was design issue or that the LR unit had simply worn out. Regardless, the system is substantially more stable now.
I am looking forward to the new cam and tuning session. It would be nice to get 340 RWHP on a Mustang dyno, with a semi flat TQ curve, at 15.5 psi on 92 octane pump gas.
07-10-2009, 08:55 PM
#5
Nordschleife Master
What is the EBC set too? if it is set to 15.5 it is doing it's job and the LR unit was toast... if it is set to 17 and the new WG is only allowing it to reach 15.5 you have another problem...
07-11-2009, 12:30 AM
#7
Drifting
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I am running an AEM. More than likely there wasn't a problem with the LR WG - it was probably the incorrect settings in your TruBoost. I have noticed that if the spring setting is too high, the car surges under boost. Too low and it bucks. It takes a while to get everything dialed in and working correctly.
As for the old technology of TiAL -vs- the LR, I say it's bull****. They both use a kevlar reinforced diaphragm, they both use a stainless spring and they both have aluminum actuators. LR uses a ceramic guide while the TiAL uses a stainless one. I believe boost is on the face of the valve with the TiAL where it is on the backside of the valve with the LR. The valve on the LR could lift and bleed off pressure at high boost, but the dual port should keep it from doing that (as long as it's hooked up correctly).
TiAL is just as old of technology as the LR unit. If you want newer technology, then look at Synapse.
As for the old technology of TiAL -vs- the LR, I say it's bull****. They both use a kevlar reinforced diaphragm, they both use a stainless spring and they both have aluminum actuators. LR uses a ceramic guide while the TiAL uses a stainless one. I believe boost is on the face of the valve with the TiAL where it is on the backside of the valve with the LR. The valve on the LR could lift and bleed off pressure at high boost, but the dual port should keep it from doing that (as long as it's hooked up correctly).
TiAL is just as old of technology as the LR unit. If you want newer technology, then look at Synapse.
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07-11-2009, 11:36 AM
#8
Pro
Thread Starter
07-11-2009, 11:39 AM
#9
Pro
Thread Starter
My theory is that the different mechanics of the Tial working against this metric translates to different boost. I will dig out the instruction manual this afternoon to get a refresher on how the unit works.
07-11-2009, 11:43 AM
#10
Pro
Thread Starter
I am running an AEM. More than likely there wasn't a problem with the LR WG - it was probably the incorrect settings in your TruBoost. I have noticed that if the spring setting is too high, the car surges under boost. Too low and it bucks. It takes a while to get everything dialed in and working correctly.
As for the old technology of TiAL -vs- the LR, I say it's bull****. They both use a kevlar reinforced diaphragm, they both use a stainless spring and they both have aluminum actuators. LR uses a ceramic guide while the TiAL uses a stainless one. I believe boost is on the face of the valve with the TiAL where it is on the backside of the valve with the LR. The valve on the LR could lift and bleed off pressure at high boost, but the dual port should keep it from doing that (as long as it's hooked up correctly).
TiAL is just as old of technology as the LR unit. If you want newer technology, then look at Synapse.
As for the old technology of TiAL -vs- the LR, I say it's bull****. They both use a kevlar reinforced diaphragm, they both use a stainless spring and they both have aluminum actuators. LR uses a ceramic guide while the TiAL uses a stainless one. I believe boost is on the face of the valve with the TiAL where it is on the backside of the valve with the LR. The valve on the LR could lift and bleed off pressure at high boost, but the dual port should keep it from doing that (as long as it's hooked up correctly).
TiAL is just as old of technology as the LR unit. If you want newer technology, then look at Synapse.
The car did not surge or buck before or after. My conscern was the apparent spiking while watching the guage. This is gone now.
I wish I had know about Synapse before purchasing the Tial. I would have liked to have tried the latest and greatest.
Last edited by seattle951; 07-11-2009 at 12:13 PM.
07-11-2009, 12:08 PM
#11
Nordschleife Master
The mechanic replaced the EBC without touching the boost controller. Are you refering to springs in the wastegate?
The car did not surge or buck before or after. My conscern was the apparent spiking while watching the guage. This is gone now.
I wish I had know about Synapse before purchasing the Tial. I would have liked to have tried the latest and greatest.
The car did not surge or buck before or after. My conscern was the apparent spiking while watching the guage. This is gone now.
I wish I had know about Synapse before purchasing the Tial. I would have liked to have tried the latest and greatest.
07-11-2009, 12:14 PM
#12
Pro
Thread Starter
EBC is the same as the controller... do you mean he replaced the wastegate without touching the EBC (electronic boost controller). I am also looking into WG upgrades, and while the Synapse is advertised as newer tech the smallest one is almost twice the size of the smallest Tial... and is still bigger than the biggest Tial.. just my 2C...
