our original baseline pulls were COMPLETELY stock...

then we added a mbc, and then the WG mod..

i never ran the car on stock ebcs with the tightened actuator..

we are running the car now with our fmic, radiator, catback and test pipe, and intake... at 23 psi tapering to16.5 we have picked up almost 70whp... and 50 wtq without a tune.

312/300 on our mustang dyno.

cb

 

I've tested stock, stock with 2-3 turns preload and Forge with 1 turn preload. You will need some sort of boost control to get the most out of any WGA mods unless you have it preloaded so far that the opening angle of the WG is restricted to induce boost creep, which is possible on the max preloads.

Even with the Forge WGA I've never been able to hold more than 19 psi at redline and the boost always starts to taper at 5500-6000 rpms regardless of your current boost set point. The good news is that 26 PSI can be held solid in the low to mid range with a Forge WGA with no Taper until the stock turbo reaches the flow limits. This makes the car haul especially in the colder weather we're getting here lately... it's almost frightening honestly.

The problem with an over preloaded stock WGA is that you can't run below a certain amount of boost because the spring is weak and you are forcing the extra boost to hold via restriction of the wastegate opening angle. The Forge works better in that you still get most of the same range of opening angle but better boost control due to a stiffer spring. At Watkins Glen I was able to run 23 psi in the low to mid RPM's and then have the regular taper down to 19 psi at redline which let me pound on the car all day without any high boost stress on the car. Back on the street I'm at 26 psi and the car is faster in the low to mid range but running that amount of boost for 20-25 minutes hot lapping would be potentially bad for longevity.

 

Finally someone knows what there talking about, sorry CBRD had to be brought into this but they were claiming they made the gains with only a stock tighten wastegate, i was showing them the gains can only be made with a mbc and tighten wastegate as CBRD did and had proof of that. I did both 2 turns and 3 turns on the wastegate without mbc and it showed no gains with proof, maybe possible if i maxed the wastegate but then you would get some horrible spikes and boost creep which is not what you want.

 

i will have to test this with the stock solenoid, just havent had time.... sorry guys.... every car is going to be a bit different...

cb

 

thinking about to get an x myself after reading all the result,