boosting issues
boosting issues
Ok, i'm running a 3076r with a Tial 44 ewg, and a forged mbc. The tial has just a single large red spring in it, and the forged mbc has the stiff springs installed as well.
The problem is I can't boost past 23 psi in 3rd gear.
Things that have been checked:
1. forged mbc has been replaced with a hallman just to make sure.
2. forged bpv has been replaced with a synapse.
3. all vacuum lines have been checked and rechecked.
4. throttle body shaft seals are good.
5. couplers have been checked and rechecked.
6. intake manifold gasket is new.
My question is do I need to install a stiffer spring set-up in the ewg, and does anybody have anything else i can double check?!?!
Getting frustrated, please help.
The problem is I can't boost past 23 psi in 3rd gear.
Things that have been checked:
1. forged mbc has been replaced with a hallman just to make sure.
2. forged bpv has been replaced with a synapse.
3. all vacuum lines have been checked and rechecked.
4. throttle body shaft seals are good.
5. couplers have been checked and rechecked.
6. intake manifold gasket is new.
My question is do I need to install a stiffer spring set-up in the ewg, and does anybody have anything else i can double check?!?!
Getting frustrated, please help.
How do you have the vacuum lines going to the external wastegate? Here's some info that might help:
Most people connect the external weastegate like this:
line from pre-throttle body to MBC then to side port on the EWG (leaving the top port vented).
The problem with this is that you are only using the lower diaphragm of the EWG to control boost. The spring hold the EWG shut and pressure opens it. Although this will allow you to run lower boost than the spring pressure in the EWG it is slow to respond and can even cause slower boost pressure build up. This is acceptable at lower boost levels in most cases.
What I would suggest doing is the following:
Run a pre-throttle body line to a "T" with one side going to the MBC and the other to the lower (side) port on the EWG. Then from the MBC to the top port on the EWG. Also make sure you have a bleeder type MBC or a vent in the top line. This diagram should explain better:
http://www.tialmedia.com/documents/w..._wginstall.pdf
With this setup you are going to get much faster response from the EWG, which results in better spool up and recovery between shifts. Also you can run higher boost than just spring pressure without any sacrifice.
I've been researching this on a couple of other sites and gathered most of this information from them. Give it a try and see if it helps your boost situation.
Most people connect the external weastegate like this:
line from pre-throttle body to MBC then to side port on the EWG (leaving the top port vented).
The problem with this is that you are only using the lower diaphragm of the EWG to control boost. The spring hold the EWG shut and pressure opens it. Although this will allow you to run lower boost than the spring pressure in the EWG it is slow to respond and can even cause slower boost pressure build up. This is acceptable at lower boost levels in most cases.
What I would suggest doing is the following:
Run a pre-throttle body line to a "T" with one side going to the MBC and the other to the lower (side) port on the EWG. Then from the MBC to the top port on the EWG. Also make sure you have a bleeder type MBC or a vent in the top line. This diagram should explain better:
http://www.tialmedia.com/documents/w..._wginstall.pdf
With this setup you are going to get much faster response from the EWG, which results in better spool up and recovery between shifts. Also you can run higher boost than just spring pressure without any sacrifice.
I've been researching this on a couple of other sites and gathered most of this information from them. Give it a try and see if it helps your boost situation.
