Quote:
Originally Posted by GrnDragon  I was looking at Kenne Bells website and saw this comparison of there 2.8H and the TVS 2.3L on supposed exact same setups... 
Take that for what you will, but it "seems" like a fair head to head comparison between the two. |
There is actually some good info in there. You can get a pretty good picture as to what is going on if they used the same car and same setup with each comparison. Like what I did below, all thsoe numbers look like this:
KB 16.5#'s 687/601 = 41.6HP/36.4TQ per# of boost
TVS 11.5#'s 573/540 = 49.8HP/46.9TQ per # of boost
KB 23.5#'s 801/738 = 34HP/31.4TQ per # of boost
TVS 14.5#'s 609/513 = 42HP/35.3TQ per # of boost
Per # of boost as boost increases figured form the variables above:
KB losses 1.08HP/1.4TQ per # of boost
TVS Losses 2.6HP/3.8TQ per # of boost
With that being the case if both ran at 11.5#'s then:
KB = 529HP/460TQ @ 11.5#'s
TVS = 573HP/540TQ @ 11.5#'s
IF you could get the TVS to spin past 14.5lbs to 16.5 this is how it would look based on loss per # progressively (as to the formula i created)
KB = 687HP/601TQ @16.5#'s
TVS = 607.2HP/452.1TQ @ 16.5#'s
Here is the kicker on that below 12#'s of boost the TVS has more umph per # of boost. At
10.5#'s of boost i calculate the (ROUNDED TO THE NEAREST WHOLE NUMBER)
KB = 48/41
TVS = 52/51
Pulley sizes where equal, but my 2.9"pulley on my MP112 gets me 10#'s imagine what a 2.9" pulley from a Procharger would do so I equalled out the pulley sizes for you:
TVS 16.5#'s = ~2.49"
KB 11.5#'s = ~3.35"
Average for KB was .07" per lbs of boost in the 16.5 to 23.5 area.
Average for TVS was 0.56 per lbs of boost. If I knew exact RPM these things ran we could really get these figured.
That being all said efficient wise the TVS is more efficiant in the lower boost levels and the KB is in the upper. So they both meet up around 14#'s of boost are about equal it seems when working all of this out. Most of my variables are within +/-1 and about +/- .1 with the pulley size. Just figured this sitting here, I am sure its not 100% but from what I can tell it seems that the difference really is in how much boost you want to make. Reliable under 15#'s my money is on the TVS, want to really get her moving run 15+ go with the KB. DO not flame me on this I just figured this by what info was given by the Dyno's above from KB. You can see though that from that formula I figured that the Eaton's loose steam after 12 lbs, but to say they are unefficiant is not 100% true depending on your varibles with your particular build.
. Its going to be hard to really compair anything without an enigne on a dyno with the blowers running the same boost, with the cost being included as well. I only did what I could see. Honestly I am a fan of the TVS. I had no intension of going over 10lbs of boost myself is why i got the maggie twice now (06 C6 & 00 SS). And just looking at those numbers the way they are even if the TVS was not optimal it still hung with it if not better till 14#'s by the numbers i got on this paper from doing all of that. Those dyno'd (much like the 'ol dyno vids, those of us who been on here long enough know what I am talking about with the old H/C debates 
) are misleading in a way but the truth is there you just gotta fish and do the math a bit 
Not to mention the fact that the TVS 1900 will be on the CTS-V coming up, and with the ZR1 getting the TVS2300 I think that says alot for itself for reliablitly and performance. It may not get the "BEST" peak HP/TQ at its max effiency but it sure as hell ain't weak.
. I would do it for free if I could get the F/I setups. I would even return them. I know do a Shop locally that has a engine dyno I could use for better controlled tests. Doubt he will let me do it for free though 
