hey guys i have a fp black and it came with a forge wastegate on it, was wondering if i should switch back and spend the money on fp's 25pd gate because of reliability, drivability.. ive had a black on the fp gate before and was fine.
never experienced forge's products.

 

Forge makes good products, you should be just fine

I'm running a Turbosmart external gate on my DBB FP Black with no issues

 

Ive been running a Forge WGA for about 2 years. 18 psi no issues at all.

 

Does the forge wastegate have two ports on it? One on top of the diaphragm and one below ?

 

The older style forge WGA with the internal diaphragm has only the one boost signal port. I don't know about the port setup on their newer piston-style actuators, though.

 

Interesting ever since my ewg set up using two ports ...its something I've always liked the boost range of

 

OP: what is the max boost level that you plan to be running with your Black?

 

35-40 kill mode lol

 

Since you already have it, I would first run the Forge. Try preloading to a reasonably substantial level, let's say 25# inititially. From that pretensioned level of 25# you will want to increase the level of spring tension up to 28-30#. You will just have to try adjusting the actuator to this level of spring tension.

You may have to cut a few threads off the tip of the actuator as Forge tends to be a bit generous on actuator rod length. Just go ahead and preload the hell out of it. Remove the backup nut from behind the turnbuckle and crank the turn buckle down until the tip of the actutor bottoms out inside the turnbuckle.

 

Ultimately you may end up having to go to the FP HD 25# actuator since you are gonna be running a relatively high peak boost level. Actually, lot of the heavy hitters, like Mikey with his undivided housing FP Black on a 2.4L LR motor, that run a Black at relatively high boost levels, prefer the FP HD 18# actuator. But they mod it by shortening the actuator rod length.

 

You may be wondering as to why not just run the FP 25# WGA and call it a day? Well, even so you'll should be aware that relying on the advertised 25# rating of the spring in that actuator, unpreloaded is somewhat optimistic. The FP HD 25# actuator actually goes full open by the time that the 18-20# range is reached, with the turbo mounted and the engine pumping high pressure exhaust through the turbine housing, unpreloaded. Thus, unpreloaded the flapper will be full open by 18#, not 25#(given no boost control device intervention of the boost pressure signal to the diaphragm, such as MBC, EBC, or ECU/BCS, and etc.). If the 25# actuator goes full open w/no preload by 18# with the turbo spinning, then it has to have started lifting much earlier.

I am only pointing out that with any actuator, be it the FP 18#, the FP 25#, either of the Forge Motorsports WGA's (diapragm-type, or piston-type) with any one of their color coded springs, or the Turbosmart WGA with either the 16# spring, or the 22# spring, you should adjust preload yourself kerping in mind your peakboost level. If there is a too wide a spread between spring pressure and peak boost pressure then the turbo is going to spool like a dog.

Sure, an EBC, or the ECU can control peak boost, and up to a certain extent control the ramp rate of the turbo. But, an EBC won't be able to optimize turbo spoolup if WG spring pressure is too low because turbine inlet pressure will exceed unpreloaded WG spring pressure at the flapper valve seat. The flapper valve will crack and partially lift, the first coil of the actuator spring will compress no matter how frantically the EBC, or the ECU/solenoid pulse the diaphragm.

 

running a aem v1 w aem 5bar. shld i just get the fp 18# call it a day? im looking HIGHHH boost. how do i mod that actuator?

 

Off the top of my head and just based on your 40# target I would say go with the FP 25# WGA. If I already had an FP 18# WGA then I might try modyfing it. But, if I were in your shoes and I was gonna run as you will over 35#, then I probably just opt for the 25# unit right off the bat.

Ask Mike over on the FP help thread for his input. I think that most of the Blacks are running the FP 25 pounder aren't they?