Powerdyne Help

[Heavy_Metal]

I have a Powerdyne kit on my truck. I use the Powerdyne supplied inline fuel pump, 12:1 FMU, and stock 19lb injectors. With that combination, I made around 5 ½lbs of boost.

I recently installed the ASP one piece crankshaft pulley. It has the accessory under-drive in the back, and the blower over-drive pulley in the front. I now make 6.5 to 7lbs of boost.

My question is this:

I just ordered the 2.7” blower pulley. When I put this on, will I need to do any fuel delivery modifications? I am not sure how much more boost it will make. Also, I have been told that I am going to over spin the blower, and tear it up.

I plan to only use the new pulley at the 1/8mile track.

Any help or comments concerning what I am about to do will be greatly appreciated.

Thanks,

Heavy_Metal

 

[thePUNISHER]

i used this exact combo when i had my powerdyne. you will not overspin the charger as long as you shift below 5100rpm. this will still give you a 1000 rpm cushion as far as the max rpm goes. i made 8lbs with this combo. you wont need any additional fuel system mods. this in my opinion is the best combo for the powerdyne. it spools up much quicker. i picked up good time using this combo. :tu:

 

[Heavy_Metal]

Hey, thanks for the help. I think my truck shifts at 5200 or 5300. I guess that will still be ok.

More questions. Just how is my fuel system supplying more fuel? Is it somehow connected to the boost you are making? How much boost is safe with the parts Powerdyne supplies with the kit?

Heavy_Metal

 

[sstock]

Heavy, I assume you are running a FMU aren't you? That being the case, fuel pressure is raised at a specific rate based on your FMU calibration and the # of lbs of boost.
Example : A 12 to 1 FMU which is widely used on 19lb injector vehicles will raise fuel 12lbs for every lb of boost. I was running 92lbs of fuel pressure with 8lbs of boost. You will be able to change your pulley to a 2.7 and it will compensate for more fuel automatically.
Like Paul says with that combo, you are at the design limit of the BD11A blower. Some live fine at that combo, but some have also broke as well. Right Bill?

Later
Steve

 

[Heavy_Metal]

Steve thanks for the information.

Yes, I have the 12:1 FMU.

Also, I have a BD-10 with about 40,000 miles on it. Never a problem! Yet.

How will this one take it?? As stated before, I will only run it hard at the track. 1/8 mile.

Do you see a new Powerdyne in my near future?

Thanks,
Heavy_Metal

 

[thePUNISHER]

i would think twice about this setup on the bd-10 but i guess theres only one way to find out!

 

[Heavy_Metal]

Yea, I forgot to tell you guys that I have a BD-10.

If I do run the combo, and it breaks, will the blower just quite working? Or could foreign material go down the intake?

 

[sstock]

I personally would not do a pulley upgrade on that model. I remember a time when the corral was full of Bd10 failures!

Good luck, Later
Steve