Need Help Speed density supercharging?

MY 85 GT · Feb 1, 2011

Ok i bought a powerdyne supercharger that has been updated with the billet propeller and kevlar belt,with a Anderson powerpipe making 10 psi or i can install the 6 psi pulley that have also with the kit..Ok my question is the car is Speed density and i know i need to put a check valve in-line of the MAP senser which way does it go anyone know?..which way flow wise i mean..lol

Cobra912 · Feb 2, 2011

not sure. But the switch to mass air is easy and cheap........10psi on SD? Is that possible?

Noobz347 · Feb 2, 2011

Yes... 10 psi is possible so long as you can supply the fuel.

The check valve is installed so that the MAP NEVER sees boost. It should only ever see VAC.

Kdubslugga · Feb 2, 2011

Is the powerdyne a BD11a? I had one once! I seriously would not run 10 psi, I ran 9 psi and the belt broke 2 times both with they exact same mileage on them. I had the unit rebuilt twice professionally by a Powerdyne supplier and it still broke. I personally wouldnt run any higher than 6 psi on those units.

MY 85 GT · Feb 2, 2011

Kdubslugga said:
Is the powerdyne a BD11a? I had one once! I seriously would not run 10 psi, I ran 9 psi and the belt broke 2 times both with they exact same mileage on them. I had the unit rebuilt twice professionally by a Powerdyne supplier and it still broke. I personally wouldnt run any higher than 6 psi on those units.

Yes it is a BD11a it was rebuilt by 928 motorsports, it has the billet impeller and kevlar belt and better bearing..Honestly the kit im getting has the 9 psi pulley on it but he is giving me the 6 psi pulley i think thats the one im going to run anyways...I want to get the car in the high 12's It ran 14.4@96 with some bolt ons...but i didnt fine tune it i think it had some more left in it..I ran street tires with a 2.0 60ft..the car is a convertible with an AOD mild stall and 3.27's gears. the car used to be set-up with an older paxton sn93 i since sold that thought i was going turbo didnt happen,so im going to try this blower comes with the extra pulley and a Anderson powerpipe im thinking it should be ok for what i want to run?

Cobra912 · Feb 2, 2011

IMO I don't think just the addition of the blower will help you pick up a second and half. low 13's I could see. But what do I know?

MY 85 GT · Feb 2, 2011

Cobra912 said:
IMO I don't think just the addition of the blower will help you pick up a second and half. low 13's I could see. But what do I know?

Well like i said i still think there is more in the car before i even put the blower on..I wasnt saying low 12's i would be happy with a 12.9...lol

Kdubslugga · Feb 2, 2011

Mine was also rebuilt twice by 928. I ran a 9 lb pulley saw about 6 or 7. Without Heads or a cam I ran 13.0 at 110. The powerdyne is ok, but i urge you to avoid putting a smaller pulley on for more boost, that unit simply cant take it!! At 6 lbs you should be ok

MY 85 GT · Feb 2, 2011

Kdubslugga said:
Mine was also rebuilt twice by 928. I ran a 9 lb pulley saw about 6 or 7. Without Heads or a cam I ran 13.0 at 110. The powerdyne is ok, but i urge you to avoid putting a smaller pulley on for more boost, that unit simply cant take it!! At 6 lbs you should be ok

Thanks for the info..i was probably going to run the 6psi pulley..This isnt go to be a race car just a fun weekend toy..

5.0Droptop · Feb 2, 2011

As stated The check valve needs to close under boost so the map wont see boost only vac.

Are you going to run a FMU?

MY 85 GT · Feb 2, 2011

5.0Droptop said:
As stated The check valve needs to close under boost so the map wont see boost only vac.

Are you going to run a FMU?

Yes i am a vortech model...calibrated to use with the 19lb injectors a 12:1 ratio...

5.0Droptop · Feb 2, 2011

Very intrested to see how well it works out. I know it can be done. Kenne Bell had/has a kit that was made for the SD mustang back in 87-88

Need Help Speed density supercharging?

MY 85 GT

Cobra912

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Noobz347

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Kdubslugga

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MY 85 GT

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MY 85 GT

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5.0Droptop

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MY 85 GT

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...all those nights we shared, and you're a dude??

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