How would dual MP1900's (if doable) be on a 427 vs a single MP2300? Any drawbacks to a dual setup? Looking at the performance maps it looks like the twins would be moving enough air to support 1000hp at only 12-14000 RPM blower speed, and still be in the 70% efficiency range. Maybe 3.75" blower pullies with a stock size crank pulley? A single 2300 would be screaming and somewhere around 50% efficiency.

Something like this but badder:

 

Heh, ONE 2300 made 950 HP. Twin TVS 1900s would be good for around 1200 or so.

 

Doit!!

 

Man that is one very nice set up...

 

I like the fact that twins would always be operating at peak efficiency.

Whatever I do will require a custom intake. Might as well make it worthwhile.

Just have to figure out how to fit it all between the pulleys and firewall/cowl. I thought there was a dual intake like that that someone made for the LSx motors?

 

yup, dual blowers were actually in production in the 90's on an Aston Martin.. they were twin M90's (the point was to do exactly what you are.. more flow at a more efficient point.. although M90's were never very 'efficient')

http://www.autozine.org/Classiccar/h...n/Vantage.html

and check out this twin M90 T-bird.. running 10's

http://www.toohighpsi.com/SCTC/sctc.htm


and you are correct, if you optimize both blowers to run at peak efficiency it will work out better for the point of optimization, but your low end power (1-2.5krpm) may be down some because your spinning them so slow and you wont be able to build as much boost as a single 2300 that is screaming. But if you are racing or have a high stall converter, i'd go twins. Not to mention, its got a certain 'awe' factor as well.

With that being said.. it will still be 10X better low end than a centrifugal with its X^2 boost curve

And i would agree, twin 1900's have enough airflow capability for ALOT of power (a single one puts down 750hp around blowers peak rpm)

One other note.. the R2300 map that is floating around is not optimized.. a standard magnuson style SC will have a much better map (think scaled R1900)

 

Yes, I dont think the low end would be that "low."

This might be a little oversimplified, but looking at the Blower Maps, I calculated airflow at 2000 RPM engine speed.

MP2300, 8.5" crank pulley, 2.8" blower pulley = 6000 RPM blower speed and 650-700M^3/hr

MP1900 X 2, 7.5" crank pulley, 3.75 blower pulleys = 4000 RPM blower speed and (325-350m^3/hr) X 2 = 650-700^3/hr

And the two setups remain pretty evenly matched with respect to airflow to redline. Unless you pulley down the 1900's .

 

That could changes things somewhat. But I was also trying to avoid some of the mechanical issues involved in spinning the blower up so high. Of course there could be similar issues designing a drive system for twin blowers.

 

Whatever you do.. dont use a fixed mechanical tensioner... (just an FYI)

 

oh yea there will be a few of those in the begining.