PerformanceTrucks.net Forums - Magnuson 112/112H info.........

PerformanceTrucks.net Forums (https://www.performancetrucks.net/forums/)

- FORCED INDUCTION (https://www.performancetrucks.net/forums/forced-induction-159/)

- - Magnuson 112/112H info......... (https://www.performancetrucks.net/forums/forced-induction-159/magnuson-112-112h-info-398553/)

Magnuson 112/112H info.........

thought you guys would like this:

Quote:

Originally Posted by Crash Dummy

OK I did a blower test on our Superflow engine dyno using a stock 5.3 truck engine with a GT2-3 cam, 90mm T body, de-screened MAF and 1 7/8 long tubes with no cats and I used the same manifold, same water inter cooler, same everything only changing just the supercharger for each test. Each test was pulley matched to produce 10lbs of boost at 6500 rpm and all test were run on VP103 ( 100 oct) gas, 12.0 AFR, and the timing locked at 24 degrees the only difference is just the supercharger and all test were done on the same day. As you can see our little 112 as we all know starts running out of airflow at around 550-600 HP and our 112H does not run out for a other 50-75 HP. I wish I had done this test and matched them all at 6lbs at 4000 RPM because that would have shown both ends of the test and produced totally different results but if you truly have a 10 lb kit this is what you are going to see. I also did this test at 7 lbs on pump gas and had the same results except the 112 did not run out of air. Anyway here is the results for you to look over, like I said this was more of a 6500 rpm test to prove that a given amount of boost at a given rpm from any FI power adder the results will be very similar.
http://i16.photobucket.com/albums/b3...rtest10100.jpg

Quote:

Originally Posted by moregrip

thought you guys would like this:

I guess I would had figured you would have found this first :jest: :jest:

lol, I guess I didn't even give you the chance to post it here as well.........doh! :bang:

btw, OUTSTANDING data Crash!

Even before me :eyes:

Added some more test data

I'm sure I am missing something but I thought the 112H was supposed to be superior to the 112 and a 2.3 like way out ahead of both...what gives?

A small blower is like a small turbo spools up quick were as a larger blower is lazy on the bottom if you took the 112H and raised the boost to match the 112 at 4000 rpm you would have around 13lbs at 6500 and you would get more top end power. Most of the blower data that is floating around out there is from old gen 3 and 4 style blowers and not the gen 5,6 or TVS and most test were done spinning the hell out of a to small blower and turning it into a oven , the 2300 is a much larger blower and does not have to work near as hard. A lot of the information floating around the internet is just hearsay and not fact and the big blower at high boost as long as it is not restricted will always win.

Quote:

Originally Posted by Crash Dummy

:judge:

Well stated. Thank you for the info. I enjoyed the reading! :hail: :chug:

A similar thing happens when going to a smaller displacement engine (e.g. a 4.8). Because the engine breathes less air at a given RPM, the blower is "larger" with respect to the engine, and so must turn more slowly for the same max boost. In the case of my 4.8, a 3.25" pulley gave 10 psi max boost. Because it is turning more slowly, it behaves more like the 2300 blower does on the chart, i.e. boost falls off more at low RPM's.

Hope this makes sense, it's early in the morning here. :eyes:

So at pump gas boost levels it seems that on the 4.8 or 5.3 the standard 112 may be currently the most efficient, and therefore the best choice?