Supercharged Cummins

It COULD but you lose the ratio multiplication. the stock crank hub is 6.5" the stock fan pulley is 5" a 1.3:1 drive ratio. The pulley I had made is a 6" and the MP90 has a 2.2" a 2.27 ratio. 1.3 X 2.27 = 3.54 final drive ratio.
It could be turned as high as 4.2:1 but I wanted to be in the peak boost/efficiency range where my motor runs most.
To get the same ratio off the crank, you need a 1.83" pulley and I dont thing there is such a thing for these blowers. The smaller the pulley, the more likely the belt slips due to less contact area.
OR you make a big ole adapter and crank pulley like most aftermarket systems use. but thats still a second belt and the fan doesnt leave much room. I may make just such a piece for the CR though, as it is really the only good way to do it.
 
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are the 12/24 water pumps different? i went out and looked at mine and it dont have a bolt to bolt onto it. or did you just drill/tap into the nub on the end? would you mind sharing details on how you did your blowers belt tensioner?

i really wana find a way to make this work on my fummins
 
The 12 vs 24 water NECK is different. I mounted the pulley on the FAN pulley. The tensioner is stock Cummins 5.9 and bolted to a bracket I made that uses the extra bolt holes in the 24 head above the water pump.
 
This is NOT a sales thread. please direct any sales oriented questions to the proper website as they cannot and will not be answered here. thanks.
 
TURBOLVR said:
This is NOT a sales thread. please direct any sales oriented questions to the proper website as they cannot and will not be answered here. thanks.
Click to expand...

I don't have your number anymore Carl, Where can I find that :Cheer:
 
Since the MP90 seems to be made of unobtainium lately, and I scored a great deal, I'm switching SC's to a polished 2.3 Whipple blower.
This will be a revised set-up that hopefully most can use.
Will be using an 8 rib belt and "ultra grip" 2.5 pulley to prevent any chance of belt slip. I am also looking @ making a new fan hub/pulley combo to facilitate higher ratio's without using a huge aftermarket crank pulley.
The charger will still be mounted on the pass side to use the IC but will be mounted flat level with the engine.
 
DONE! :group:

mms_picture-24.jpg
 
no harder than twins, just pull off the air filter.
I can pull the ENTIRE blower assembly off in less than a minute if I needed to. ;)
 
:woohoo:
Nice, we need more specs.

2.3 whipple , ratio ? and turbo specs?

How much boost the supercharger make at idle and how much is total boost.

Do the whipple have internal overflow valve?
 
AsTroSS said:
:woohoo:
Nice, we need more specs.

2.3 whipple , ratio ? 2.6:1 and turbo specs?80mm/.96 T4 Y2K

How much boost the supercharger make at idle2psi and how much is total boost.

Do the whipple have internal overflow valve?
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external on this model and it isnt hooked up. I am using the Whipple to compound the Y2K. :Cheer:
 
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