impeller speed

[Brcuda]

Have any of you guys calculated your impeller speed? If so what pulleys are you running and the impeller speed? The link below will give you the calculator to figure it out.

Thanks


http://www.vortechsuperchargers.com/tech/impspeed.html

[Spence]

I have a 77 crank and 28 blower..............71,000 rpms thru the traps, 25psi after the igloo.........eeeeeekkkk!!!!!!!!

[Brcuda]

Originally posted by Spence
I have a 77 crank and 28 blower..............71,000 rpms thru the traps, 25psi after the igloo.........eeeeeekkkk!!!!!!!!

Are you shifting at about 7000 rpm?

[Spence]

I shift 7400-7500 and hit the traps around 7500-7600

[Bellman Jeff]

Originally posted by Spence
71,000 rpms thru the traps

Man, that's turbo rpm territory ...

[Spence]

only way to make power.......hehehehehe spin it till it bleeds.....

[Andrew]

72 tooth crank pulley, 28 tooth blower pulley, 6700 rpm shift point..... 59438 rpm.... 17 psi after the igloo.

[vortechwalt]

what gear ratio
what size tires
what compresion ratio
what size engine
what heads
what head gaskets
what size headers
what size cam
what tranny

rember me? bob refered me to you for that tps modifier at bradenton
Walt

[Spence]

Originally posted by vortechwalt
what gear ratio
what size tires
what compresion ratio
what size engine
what heads
what head gaskets
what size headers
what size cam
what tranny

rember me? bob refered me to you for that tps modifier at bradenton
Walt

yep I remember.

what size tires-325/50/15 BFG drag radials

what compresion ratio-9.5:1

what size engine-306ci

what heads- Twisted Wedge

what head gaskets-fel pro 9333 with wire in head

what size headers-1 3/4 to 1 7/8 3.5 collectors Kooks Step headers

what size cam- Anderson BS6 solid roller....slightly over .600 lift with 1.72s

what tranny- Dynamic pro tree 2 powerglide

[JHenke]

One more question, What kind of 'wears? Boxers, briefs? WE NEED TO KNOW YOUR SECRETS! hehehe:D

[Spence]

No tighty whiteys?..........ROFLMAO!!!!!!!!

Henke you rule Bro........

[Brcuda]

Spence, have you ever worn out the bearings or anything overspinning the blower?

[Spence]

nope,
that blower was on the car for 2 years, made close to 200 passes with it, never had a problem.

[Brcuda]

Thats great. At how much boost did you decide to go with any type of aftercooler. I still have pics of your one install of the intercooler in the front of the car.

[Spence]

I decided to try inter/aftercooling after a few blown head gaskets thinking the discharge temps where the problem, but they werent. I went air to air first, this worked good, then I went to the igloo, also worked good, now I am going in car cooler, will have results soon. without the coolers, I have seen 27psi at 75-7600, with the coolers usually I see 23-25psi depending on the conditions outside.