1Randyc

Well, so much for my grand adventure to get some boost upgrade for my Comptech S/C...



There seems to be some mis-information floating around.
From straight from Paxton, Novi-1000 blower's maximum impeller speed is at 45,000.

Some info on the net said 55,000 but I guess that is wrong.

Even if I push the thing to the limit I probably end up with 7psi at max going through my intercooler set-up.

I feel like a dumb ass for not checking this out sooner.

Oh well.....

Wait for Comptech's upgrade when they decide to come out with one, just don't expect it to be significant.

Wesmaster

I'm confused. The Paxton website rates the NOVI 1000 at up to 12 PSI. Comptech themselves told me that during their testing they ran the SC at up to 12 PSI. Are you saying that the NOVI 1000 can only produce 9 PSI (or 7 PSI intercooled)?

davepk

Randy,

Maybe what they are trying to say is that it produces 12psi at 45k RPM???

1Randyc

I wish what I heard was wrong. But I specifically asked for the maximum impeller speed for Novi-1000.
My fabricator originally asked first and got the same answer.
If I used the 55000 rpm as the guideline nevertheless I will damage the bearing for sure.

Check out the Vortech's page for calculating impeller speed.
Super charger pulley diameter is 4.75 and the crank diameter is 5.5
http://www.vortechsuperchargers.com/tech/i...mpspeedv-2.html

It may not be exactly same but seems to be close to what my fabricator calculated with.
Diameter of the pulley shouldn't be less than 3.8 or something like that. He said that is even pushing it very far.

Anyone want to contact Shad at Comptech to make sure if they really tried pushing to 12psi?

Thanks.

rocketman

If you limit your shifts to 7000rpm. you could use a 3.25" pulley

I would say the upshot of this information is that any aftercooling should be done using an air to water aftercooler. I think there is little or no pressure drop with this kind of setup.

RevIllusions

HTH.....not sure if anyone is still intersted in this. I got an email from paxton themselves...:

"The novi 1000 is designed to max out at 17psi of boost. If you are looking
to go that high, i would recommend using the novi 2000. That way you wont
be maxing out the blower. The novi 2000 is capable of 25 psi of boost. It
will work just fine at 17 psi, and you wont have to worry about over
spinning the blower.

-
Thanks Micah"


- jerry

Big Ben

[QUOTE]Originally posted by rocketman
[B]If you limit your shifts to 7000rpm. you could use a 3.25" pulley

Jason00S2000

I don't know if it makes a difference, but Mustang guys are maxing their novi 1000's at around 450 rwhp.



Shouldn't that = room to grow for the S2000?



If I'm wrong, Wesmaster feel free to me.

sfphinkterMC

link for impellar speed calc. didn't work for me.

what is impeller speed for 3.6" pulley?

Honda-S2000VTec

What is the impeller speed for a 3.0" pulley?
I think we will need to figure out the diameter of the crank pulley in ratio to the S/C pulley and then multiply it times 3.54.
Does anyone know what diameter the the Comptech crank pulley diameter is?