I just istalled my stage 2 yesterday and just had to ask the experts about the wastegate adjustment. Ive just read that some people leave two threads showing and others leave other amounts showing. I would like to spike and hold as much boost as safetly posible. I would also like to know about switching the vacume lines. Ive read about that and would like to know a little more about it if you could let me know. Thanks alot in advance.

 

stage 2 is designed to run a certain level of power. so upping the boost isn't going to make more power. this is the classic example of more psi doesn't equal more power.

also switching vacuum lines isn't a good idea on s2. it's designed to run off certain lines. if you wanted to adjust psi levels and play vacuum line lottery then there are other directions that you could have gone in that would lend itself to that more.

as for adjustment, you should have marked the wga arm before it was installed. the proper setting is 4mm preload. the easy way to do that is tape 4 dimes together and see if they fit in the space.

 

One note. Different wastegates seem to operate properly at slightly different levels of preload adjustment. A good idea is to leave your upper heat shield off so it is easy to adjust. First set it like psichick said 4 mm is MOPAR's recomendation. Unbolt the wastegate, unpin the arm, unlock the locknut on the arm, and mark the arm where it enters the mechanism with something like a sharpie. Re-attach it and measure how far the arm has pulled out of the mechanism. Adjust by unhooking and rotating the adjustable end until it has 4 mm of preload when attached. Unhook the battery when you are doing this (on a cool engine, of course(that wastegate gets DAMN hot)) and when it is re-assembled - hook it up and build up speed gradually to let the ecu learn the setup. Do a few third gear full throtle highway pulls and the computer should get settled in. Afterwards do some full throttle driving, and have a friend watch the boost and see what happens. You are looking for a boost hold of around 17psi after a spike a couple pounds higher.

You may find that 3mm or 5mm works better, the wastegates can be a little off, so that is why you want to leave the heat shield off. If you have a high spike or can't get to the boost levels, you want to let the engine cool, and repeat the process, adjusting the arm slightly in or out. I found that 2.7mm of preload worked with my system. Once you are set, then put the cover back on, and enjoy replacing tires 35% more quickly.

 

thanks alot for the advice, I thought that the boost I was getting was a little low 15 spiking and then dropping down to about 13 with DAB set at 3. Now I know for sure and I did leave the upper heat shield off just incase. Thanks again and Ill keep you posted on how I come along. Thanks again for your help because I just dont know anything about wastegates.

 

DF is here to help. We're not like the "other" SRT-4 forum which makes you feel like an idiot for posting a guestion....[:@]

Dusty