I realize the rear entry is supposed to be better, but when thinking about it logically I don't understand why. I figured I'd ask and maybe I can get a logical answer.

Take the two new blowers coming out.
The Kenne Bell is supposed to have a plenum area at the back that the rotors draw from, which you would think would negate the top entry? It also has a large opening to draw from.

The Works is a rear entry and makes a tight bend around to the back. You would think the tight bend would be smaller in size than the opening on top of the Kenne Bell? Although these are thoughts it seems as though the rear entry is more favorable but WHY??

Thanks Mike

 

Man for a while I didn tknow you where talking about blowers and I thought you where one sick bastard talking about rear entrance and ****. LOL

 

rear entry is supposed to be more efficient, also when you use the top loader it decreases the blower displacement, kinda like chopping off the top of a engine block

 

Oh boy, here we go again.

Not to sound like a jerk, but I've explained this many times before. I'll explain it again because you asked, but I'm sure this thread will turn into a war like all the others.

First off, about the Works intake. The intake has been specifically designed so that the inside of the intake maintains the same cross sectional area from the TB to the blower inlet. There is no restriction in the Works intake, that's why it works so well.

As for the top vs rear inlet, the rear inlet is more efficient. Axial screwchargers are designed to to injest air from the very back or the rotors, and compress it forward through it's screw rotors. When you have a top inlet, two things happen. One, is that the inlet itself reduces the overall surface area of the blower, reducing the displacement of the rotor pack. Just like on the stock Eaton, it's a 112 ci rotor pack, but the actual displacement of the blower is more like 95 ci or so. Two, is that with the sides of the rotors exposed, the incoming air gets "paddled" by the moving rotors, and the turbulance causes the incoming air to be heated up from being beat up before it actually gets injested into the rotors. There are two prime examples of this. One example is the new KB blower and the Works 140. Both blowers use 2300 cc rotor packs, but the top inlet on the KB makes it 2200 cc's, not a true 2300. It's a minmal difference, but it goes with what you asked. Also, if you look at all the data that's been posted between the KB and the 140, the rear inlet 140 makes more boost at the same rpm as the KB, showing the benefit of the rear inlet. The second example is the Lightning's 112 Eaton vs the 03 Cobras 112 Eaton. The top inlet Lightning 112 maxes out at about 18 psi, MAYBE 20 if you spin the HELL out of it. But the rear inlet 112 on the 03 Cobras, are hitting over 22psi.

Hope this helps.

 

Twinturbo
I was wondering when somebody would notice that. The rear entry becomes very dependant on the new manifold design. It might be a better design blower, but will the manifold be able to support it ??? Anyway you look at it the air has to go around a big turn, on both blowers. And as far as the top entry having less capacity.....not.....it might cut down on its ability to create a vacuum but it does not hurt its ability to create pressure. (how politically correct was that )
Dale

PS I am obviously not a supercharger engineer, but some things are just common sense.

 

Ok i just got some *real* world Test Results. The *New* KB vs. the Works 140..The test was made with the 2 blowers making 15# of boost..I'll have the test sheets to post later.I wasn't going to post on this subject anymore but since were being told the KB Makes less boost and is a smaller displacement blower ect.. Maybe the test results will help us in making a logical choice..Remember i'm just giving the * Test* results which took place in Sweden.where these blowers are manufactured. Here it is....
1- The works 140 flowed 3% more than the KB... Lets say we make 100 hp @ 15 # of boost..that means the works 140 made 3 More HP than the KB.. due to the *Rear Entry*
2- The KB @ 15# of boost took 10 HP! *LESS* To drive than the 140!
3-The KB also @ 15# had 8-10* *COLDER* Air Discharge temps!

10 HP Less to make 15# and 10* COLDER discharge Temps!!!

The reason we see such a difference is because the *NEW* KB Unit has a *NEW* Profile Rotor pack..Thats why i said the *NEW* KB Unit with the new rotor packs and NEW Designed upper inlet will make more power than the *OLD* KB which everyone was refering to when they gave info. on the 140 rear entry against the *TOP* Entry KB... Also the real proof was when i was running 10.9's with the *OLD* KB Unit with my Modified upper plenum...Then tested the *NEW* KB with a *STOCK* Upper plenum and ran a 10.5! If i had my custom upper plenum on i realy believe we would have seen a 10.3!I knew this *NEW* Unit was making a HUGE amount of power over the OLD Unit!

There we have it... The KB vs 140 in a Real Apples to Apples testing facility...The results are what they are....The Next Test will be the Flowzilla vs. the 140 intake we'll have that @ a later time..I'm eagerly waiting for that result... so we can have some data to back up our claims......JL

 

Wow nice data JL...

 

JL Id like to know how you got that *real* world testing of the Works 140 since only Phil and myself have one and no one has had it for "testing". Just who did this *real* testing of the Works 140? Who told you this ...Jim Bell?

The testing was done by whom? Autorotor? If so, it has the same validity as Works testing both blowers and making comments about the KB. What 'real testing facility' is this? I assume it is an independant test lab. Voodoo.

I think Blackbolt99's idea to test them is great. Hell you can even use mine if you like.

 

Dale - after the conversations that I've had with you about the intakes, thats how I see it also.

By the *look* only on the intakes, the works intake looks as if it makes the air entry around the turn alot better then the top entry. The top entry has that 90 degree turn, which is rough to get air to flow through in an efficent way.



JL - nice data

 

CALightnin: you say the test was VooDoo? And there are only 2 works blowers?...Like i said i will have the data sheets to post later...You can believe the results or Not! Thats up to you. and up to everyone else too....We have 60 people getting ready to receive their KB Units in 2 weeks..Just like the customer in SC who went 2 sec. faster! And was a Happy Camper.there will be alot more happy campers here shortly...you might not believe that either but again thats up to you........JL

 

JL I asked how you tested a Works 140, and who did this testing please?

PS: As for when the KB will be out I have no idea. But since you brought it up, I recall several posts where they were to be out in two weeks.

 

how does those facts scale out JL? what if you run 8Pounds, or 20 pounds still same increases? COmputer hardware often shows at a scertain speed one might be better then the other but not at all speeds due to how they were designed.

 

Just to stir the pot a little more.....I was looking at Danny Swanson's site a while ago and I would swear that he has a picture of a rear entry S/C (with large cast manifold) sitting side by side with an Eaton 112 for comparison purposes. But I thought Danny was a KB dealer. Anybody else think that is curious.

And furthermore .......I'm under the impression that the Lysholm 2.3L blower has been around for a while and the only thing that makes it unique to the Lightning is the adapter plate and the cast intake manifold.....So my question would be "Was the blower test done with that cast intake manifold on the Lysholm blower or was it not"?? And if it was not then.....well......Hmmmmm.
Dale

 

If you start it out like that then I'm sure it will turn into a war.

 

...

I'll believe the tests when they come from an average joe, weather it be by me, or someone else who has nothing to gain.

The fact that JL/KB didn't and wouldn't respond to my challenge, shows alot to me. And now they had a challenge of their own in Sweden? Something that just happened? Of JL just felt like posting about it now.

Actions speak louder than words JL/KB, honestly, if you have so much pride in your product, send a rep down to my challenge with a *NEW* KB blower. Oh and something you learn in Psych. 101, when someone keeps driving a point, i.e. JL keeps saying '*NEW*", it shows he's trying to convince you more than inform. Just my opinion though. But again, what do I know?