Hey guys! Been a while since I posted on here but wanted to share a project my partner and I have been working on. We have probably all seen the cheap M122 blower on eBay for $300. https://www.ebay.com/itm/NEW-GM-EATO...oAAOSww5Zdllud
It was originally on the Cadillac STS-V's and XLR-V's before the GM bankruptcy. After that, these have been sitting with no real purpose so we thought it would be cool to try to adapt them to the LS platform and try to come up with a more budget-friendly boost alternative. We all see the cheap adapter plates for the LSA conversions and had a similar goal. We were very wrong.

Once we had our mockup engine and the blower, we realized this was not going to be so simple. After a ton of measuring, designing, drawing and numerous design changes, we were able to have them 3d printed to check fitment and ensure every bolt lines up. We looked at countless options from injection molding to 3d printing as well as countless materials to makes these out of. At the same time, we looked at outsourcing the work and machining to cut cost and without sending our work to China, we were unable to do so. We decided that we were going to make all of them, keep everything in house, and be able to control quality. I'll get this out of the way early, The adapters include all bolts and gaskets, and start at $1300 for a set. I know that is expensive for adapters compared to the $200 LSA sets, but there is a ton more work and machining required to make these.


Since then, we have been manufacturing these and have shipped all over the globe as well as be able to add to our product line up with accessories, add-ons and both cathedral and square port designs. These adapters are set up off of truck spacing with minor changes needed to the factory truck style accessories. We are also able to machine the snout of the blower to fit other accessory drives as well. We have yet to push these hard but I can tell you our "test mule", 1970 C10 with a junkyard 5.3 has been running excellent for about a year now at 9lbs of boost and 550+ horsepower with plenty of room to grow.
I will add some more posts to this with pictures so you all can see a bit of the progress but I have a ton more info on our page, MackDaddyparts.com

 

This a 2 piece design due to bolt locations and we use all GM o-rings and gaskets. Here is the bottom adapter in place.

Here is the top adapter in place.

 

There is just a bit of machining needed to the bottom of the blower to lower it about 1.5". This will allow it to fit a wider variety of vehicles and even on a truck, where the firewall comes out over the intake. We use a CNC but I have had several customer use a steady hand and a grinder.

You then need to make a block off plate and seal it up. We have blowers in stock and ready to bolt on, or we offer this service.

 

Once the blower is in place, you can see it's not much taller than a truck intake manifold. In fact, it is only 1/4" taller.

 

Any videos?

so this would be about 2k to supercharge my truck... very tempting

 

https://fb.watch/35yjU7WzvY/

Hopefully that works. I plan on getting more very soon. I do have more on our page.

 

The blower comes with a DBW TB but it may not communicate with all TAC modules. We do have a way to use the factory LS TB with a couple of adapters. With the blower sitting on the engine, you can see there is still quite a bit of room to route a 3-3.5" tube around either side, and mount your TB anywhere.


Here is one on a 2005 Silverado

 

Here are a couple pics of it installed on the C10 using a DBC TB.

 

I've been seeing these blowers for under $200 lately. I considered buying one until I seen the price of the adapters.
With some time and effort, a used LSA blower can be done for the same price is the biggest issue, and the LSA blower looks significantly better.

 

I agree on the looks. It can be very difficult to stay on price though. Most of them I see are $1200-$1400 and need rebuilt.

 

Most just need a new isolator which is cheap. The point is that even at 1400, plus 200 for the adapters, it's the same price as the MP122 and your adapters. To boot the TVS 1900 is a 4 lobe rotor vs the mp122s 3 lobe. It's a neat idea, but the cost of the adapters is a turn off.

 

And the TVS will fit a wider variance of vehicles as these take up some space. I'm not saying it's the best option by any means but wanted to give these blowers a purpose. Not a get rich quick scheme by any means haha! We have had some good successes with it and look forward to pushing one a little harder.

 

Wow very neat!

 

Really great idea!! So does that price for the adapter plates include the machining that has to be done to the supercharger?

 

thanks man! It does not. If a customer has the blower already I provide instructions on how to lower it. Hasn't been an issue at all. I also sell complete units, blower and adapters for $2300.

 

This is a really cool concept. I feel like if the price point was just a bit lower it would definitely catch on.

 

So in other words - it doesn’t fit anything at all.

 

it will fit any trick/suv and tons of LS swapped vehicles.

 

mackdaddyparts.com takes me to a FB page, do you have another website?? I quit FB years ago
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I dont unfortunately. it seems everyone is quitting Facebook so I may have to look into that.