Brahmus,

I respect your opinion greatly. You are incorrect here. There was a normal burn as evidenced by the plugs.

 

WAY TO GO on this one Brahmus!!

 

Brahmus,

I bring the quote on this great data that you brought to our attention here so you can perhaps clarify your statement about CFM and how misleading boost pressures are:
"Thirty six years of aftermarket experience in high performance has taught us that you never bring a knife to a gunfight. We use the Autorotors on our 5.0, 4.6GT, '99-'01 Cobra, '03-'04 Cobra, '96-'98 Cobra, and Lightning kits. These guys don't exactly sit and idle in their driveways. Hundreds of Cobra and Lightning owners have replaced their wimpy low 9 psi boost, lower efficiency Eatons with the rugged more powerful Kenne Bell/Autorotor Twin Screw, which can develop twice the boost with huge increases in HP- reliably.

Thank youin advance for your great didactic trades

 

WOW!! If you guys don't holster your six-shooters on this topic, this will go on for 100 pages. I have had others totally take over some of my threads where I needed help and they have gone in an oposite direction. I think Dogedoc and a few others have lost touch with the original post. Lethal just wanted some opinions and advice as to which S/C he should buy that will give him more power and won't blow the bageezes out of his motor. All this scientific data is great if you're writing a book or you're planning to build your own blower, it's not really helping Lethal in making his decision. I'd like to here from Lethal and see what decisions he's made (if any) or at least where he's headed. As for myself, I've enjoyed this forum greatly. A special thanks to Dogedoc and Brahmas for their input. You're both very knowledgable on poweradders, far more than myself, and I look forward to reading more.

 

ADT,

Thanks for the accolades. Consider my sidearm on safety.

 

Hum, that art of reading plugs. Soon that art will be lost as I rely to much on a/f gages.. haha..

 

Yes it's writen there and talked about it every forum concerning FI. In general increasing psi will increase power but what they are doing that is more important is moving more air at a give engine rpm than before. Changing the ration at which the blower spins in relation to the engine.

It's one of those terms that won't go away. I guess because it's easier to read psi that CFM.

Do you still not agree with me that psi can be misleading? It'll give a round about idea of what kind of hp you should make but there are more accurate methods measurements.

 

Here in lies information for him to make a better decision!! Haha.. Actually that answer differs from each person to the next. As was brought up several times, all are good, but some suit one person better than the next.

I think this thread is one of the more informative threads in a while, sure has made me think!!

 

I'll give you a hand with this one. Great article here by Big Jay.


Boost is not a power adder...
http://www.turbomustangs.com/techart...gjay/boost.php


I strongly suggest this article be added to everyone's Favorites list....

 

WOW!! If you guys don't holster your six-shooters on this topic, this will go on for 100 pages. I have had others totally take over some of my threads where I needed help and they have gone in an oposite direction.

Why...whos thread was this..

 

No.But I'm trying to.

Phil

 

Ok help me out here.Pv=RT,,v and R are constants?You give up T and P?
Sorry but I don't get it?????

Phil

 

I have really enjoyed this thread so far and I didn't imagine it growing to this size. This thread has given me a lot to think about and I believe to really make up my mind I will probably need to ride in a couple of trucks that are running a roots and a cent blower to get a true idea on what I prefer. Both blowers have great points and they both have their downsides to. Like I said I believe that seeing and feeling will probably make my decision easier!!

I'd say keep the posts coming, cause there is a good deal of information coming out!!

 

Ideal Gas Law PV=nRT Here n=1 so Pv=RT P=pressure (psi) T=absolute temperature (in degrees K or R) R=universal gas constant=8.3145 kJ/(kmol K) v=Volume (on a small level, across the intercooler where T changes the volume remains the same=constant)

Therefore T and P are a direct relationship. Linear actually but no blower is perfect. Their effiency is the measure of how close their actual T and P line is to the ideal gas law.

 

No matter what you choose you'll be happy. I agree that riding in each truck with a different setup will help your choice but it may just come down to money. If that is the case get what you can afford now and you can always upgrade or sell it and buy something better. I'd say find used but since these trucks are still fairly new and the same with the blowers that may be hard.

I'm willing to bet which one you'd like better if you get to ride in each type !