I'm just trying to stimulate thought; look at a 4th gen chart, you can prove the above statement, just like you said bro
Now with that said, is it possible for VE to increase and/or maintain a high percentage when spun past 14,000rpm? Reread the statement above, there's an important component to a draw through system, "a big gulp of fresh air"

 

Maybe the better choice would be an 8" crank pulley over the stock 7.5".
ATI will make you one if you send in your stock piece.

 

So,how long will a Radix last spinning 20,000 rpm?Will it make any more boost at 20,000RPM?How high will the IAT's go?How much would a 100hp shot of nitrous boost power?And when the Radix comes apart how much damage will it do?

 

i have no idea what you just said , based on the ve chart i am prety sure the ve will fall off above 14,000rpm. any compresor is going to have a sweet spot and it looks like 14,000rpm is the sweet spot. above this point you will start to see diminishing returns. that isn't saying it wont make more power as you spin it past 14,000rpm but the gains per rpm increase will be less and less as the rpms go up.

 

If you know for a fact that the supercharger will live at 20,000rpm a larger crank pulley can be built by ASP,L-eater has one on his intercooled Whipple setup.I just don't know if the result from investing $300 on a crank pulley would payoff in increased performance.

 

I would say it wouldn't be a problem as we are talking short amounts of time. To answer your question directly, I can't say for sure. When Lingenfelter was around he spun these things to 18-22k rpm. Also they are durability tested to OEM performance standards which is quite impressive.

 

this thread is here to discuss facts absolutely, but we will also allow some discussion on what may or may not work for a specific type of FI, what you've heard or learned or just some idea you've had that makes sense to you that you want to bounce off someone.

let me post the Premise again:

Premise:
Lets talk about the pros and cons of each FI power adder. Let's see facts and forward thinking, This is not meant to be a bash on ANY power adder...any direct hits at ANY manufacture that do not have facts to back them up will be deleted. Have at it folks.....lets see the knowledge, lets talk about what might and might not work, tell us what you know, share your experiences, and lets keep this one respectful and proper when discussing our different views

lets allow everyone the oppurtunity to express themselves however they wish as long as they are not disrespecting anyone or attacking a manufacturer and it's on topic.

 

(Cleaned up my mess. Sorry for being such a pig. ) One question which has been asked is what are the upper speed limits of a blower? Well, besides mechanical strength, I believe (recalling the graphs from memory) that airflow increases linearly with speed, but the required power to spin the unit increases at some rate faster than linear. Therefore, a point will be reached where any additional power gained by increasing rpm's will be offset by a greater increase in power draw, and net power will decrease. Also, as Brian Z pointed out elsewhere, at high speeds the blower becomes very sensitive to inlet flow restrictions. This makes sense, for on the output a restriction can be overcome with increased pressure, but on the intake, one is limited to a maximum of 14.7 psia pressure. Thus the larger aftermarket intake netted about 15-20 hp in his test. I suspect this is also why he is going with a dual blower system on his truck. By having two intakes, he can effectively double the amount of incoming air, something that would be very difficult to do with a single intake system.

 

Attention: I am pruning this thread of any off topic posts/posts that do not directly contribute to the thread topic, thanks

No data or "on topic" discussion is being affected.



Premise:
Lets talk about the pros and cons of each FI power adder. Let's see facts and forward thinking, This is not meant to be a bash on ANY power adder...any direct hits at ANY manufacture that do not have facts to back them up will be deleted. Have at it folks.....lets see the knowledge, lets talk about what might and might not work, tell us what you know, share your experiences, and lets keep this one respectful and proper when discussing our different views

Enjoy!

 

manually activated efans are a big help because you can pull air through the heat exchanger when you want. A full gulp of cool fresh air is another important factor.