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Did you find out which one it is? I’m in the process of finally getting my hands on a Comptech Supercharger. What are the modifications needed to bolt it into the TL type S vs the Base? I know ppl say the power output isn’t worth it, but if I end up with the extra 60-70 horsepower, A.C. still there, and the cool whine I’m ok. Would I be doing any harm to a perfectly healthy motor by adding it to the Type S?
Similar conversion kits were also made by Paul. Bruce (EndlessRPM) previously ran one of those set-ups. You can still see his photo on Acurazine.
I been toying with this idea for a year now as well. I wish I saved all the thread and pics from back in the day when i was actually active on Acurazine. Now that I need the info I don't have it
I been hunting the M90 supercharger at my local UPulls. They have the "right" cars but never the supercharged versions of them. Next best thing is to go to a private sale... but then I may be stuck with a part that doesn't work as intended.
Personally I think an M90 conversion would be the best. Not just for power... but because you're going to need to fabricate a new base for it as well as a new inlet for the TB. It's the perfect time to create a new design for easier intercooling piping or meth injection.
Found online. Gen 3 left. Gen 5 right. Gen 5 looks like our closest bet.
This is from a Pontiac Grand Prix I believe. The inlet won't accept the CT at all... and unfortunately without jproy's photos we don't really have any clues to go off of.
I'm pretty positive it's the Eaton M90. Found in many GM cars (Pontiac, Buick for example) and some Fords.
@o4Komodo If I'm not mistaken @Acura TL Builder already has a top mounted M90 on his Automatic, soon to be 6MT swapped, 3G TL.
His original post is in regards to mounting an M90 style blower to the last Comptech Engineering shaft snout, he acquired, to mount under the hood of a 3G TL.
Originally Posted by Acura TL Builder
Last Comptech snout
Since jproy, the only other 'active' A-zine forum member to mount an M90 to a CT-E snout is Karanx7, from the 2G TL side. According to him, he used a '...4th generation MP90 supercharger from Magnuson....'
Originally Posted by Karanx7
It's a 4th generation MP90 supercharger from Magnuson I believe.
From Karanx7's picture below you can see, somewhat, that the modified 'inlet' manifold plate is larger to fasten to the M90 inlet case and how the CT-E snout & blower bracket bolts up to the output shaft area.
You can also see how he modified the outlet manifold 'exit' to a coupler as well. Obviously, what you can't see clearly is how the 'outlet' manifold plate was modified to get it to fasten to the M90 outlet case.
Originally Posted by Karanx7
The 4th gen MP90 has the same bolt pattern on the shaft side, so it bolts the same as the MP62. However, the intake and outlet are bigger. The inlet uses a simple sandwich adapter that converts the bolt patterns. The outlet collecting manifold under the supercharger was modified to fit the larger MP90.
@o4Komodo If I'm not mistaken @Acura TL Builder already has a top mounted M90 on his Automatic, soon to be 6MT swapped, 3G TL.
Yes, he does. It's the top mounted one that sticks out the hood.
His original post is in regards to mounting an M90 style blower to the last Comptech Engineering shaft snout, he acquired, to mount under the hood of a 3G TL.
Yes, I'm aware. And that's what I'm talking about too.
Since jproy, the only other 'active' A-zine forum member to mount an M90 to a CT-E snout is Karanx7, from the 2G TL side. According to him, he used a '...4th generation MP90 supercharger from Magnuson....'
If that's true then... that's too bad. The 4th gen Magnuson is based off the Eaton 5th gen (they skipped 4 and went from 3 to 5). The Magnuson has a modular inlet port while nearly all 'OEM' m90 Eatons have it casted to the casing.
This means you'll be spending $800+ on the Magnuson if you can't get a deal.
I think most of us were hoping to yank it off of a parts-car.
From Karanx7's picture below you can see, somewhat, that the modified 'inlet' manifold plate is larger to fasten to the M90 inlet case and how the CT-E snout & blower bracket bolts up to the output shaft area.
You can also see how he modified the outlet manifold 'exit' to a coupler as well. Obviously, what you can't see clearly is how the 'outlet' manifold plate was modified to get it to fasten to the M90 outlet case.
Thanks for the pic. The main issue was really the snout and inlet.
^
I would say that is a 'custom' snout shaft because it moves the whole blower unit further to the drivers side.
Originally Posted by o4Komodo
This means you'll be spending $800+ on the Magnuson if you can't get a deal.
I think most of us were hoping to yank it off of a parts-car.
I guess the $64K question is there specific salvage yard cars that would have the proper M90 with the front 'output shaft case' to 'plug n play' fasten the CT-E output shaft?
I guess the $64K question is what specific salvage yard cars would have the proper M90 that already has the front 'output shaft case' to 'plug n play' fasten the CT-E output shaft?
I only know of the 5th gen Eaton for the 04-06 Pontiac Grand Prix.
Here's a pic of the blower
However the inlet is casted onto the casing and it looks huge. There might be clearance issues.
Also I checked Karanx7's j36 build thread and he said he bought his m90 kit from another member here. That member most likely was the one who bought it off jproy. So now I doubt Karanx7 has all the proper info about which exact m90 it was.\
Originally Posted by zeta
^
I would say that is a 'custom' snout shaft because it moves the whole blower unit further to the drivers side.
Whatever it is... it looks like it has a modular inlet. If it's a 5th gen m90 then it's pretty promising for the CT-E conversion.
Also I checked Karanx7's j36 build thread and he said he bought his m90 kit from another member here. That member most likely was the one who bought it off jproy. So now I doubt Karanx7 has all the proper info about which exact m90 it was.\
Good catch.
Even though, you can see that Karanx7's M90 input manifold area is non-modular? Or I'm I not using the correct term?
Therefore, Magnuson must have made these units, at some point, to enable bolt on input manifolds.
The same with the output shaft cases?
Good catch.
Even though, you can see that Karanx7's M90 input manifold area is non-modular?
Therefore, Magnuson must have made these units, at some point, to enable bolt on input manifolds.
The same with the output shaft cases?
Karan's m90 input is modular. That's where jproy made the adapter plate to fit the CT elbow.
The "output shaft" is the snout. It's more of an input than an output (since it's been driven by your pulleys).
Maybe to find an answer, it will be required of Acura TL Builder to send Magnuson a picture, like the one below outlining the M90 input snout case, inquiring about availability, to bolt up the CT-E input shaft?
I have here an MP90 from 1991 Mustang/Camaro. It’s says 3.8 on the bottom on the underbelly. It’s very compact but the bolt pattern is the similar to the Eaton M90 Gen 3. A custom plate would have to be made
Eaton M90 Gen 3 bolt pattern is different than the Magnuson MP62 on a Comptech S/C.
The 2.179” measurement is the MP62 Comptech. It seems the Eaton M90 5 Gen Supercharger May fit the Comptech shaft.
Last edited by Acura TL Builder; 06-05-2021 at 01:14 PM.
Maybe to find an answer, it will be required of Acura TL Builder to send Magnuson a picture, like the one below outlining the M90 input snout case, inquiring about availability, to bolt up the CT-E input shaft?
It had to be made at some point for a specific application / time, right?
Although, I'm afraid it would be a miracle to find a specific salvage yard M90 with that exact input reservoir case without knowing what to look for, if it exists in mass quantities.
Blue = CT-E input shaft sealed & fastened (blower bracket) with 4 SHCS (6X35) & 2 SHCS (6X30?) to, Yellow = The input oil reservoir case held to,
Red = The impeller / gear assembly by the reservoir case bolts fastened to,
Green = the threaded supercharger impeller housing.
I have here an MP90 from 1991 Mustang/Camaro. It’s says 3.8 on the bottom on the underbelly. It’s very compact but the bolt pattern is the similar to the Eaton M90 Gen 3. A custom plate would have to be made
Those, along with the thunderbird, are the nicest gen 3 m90s due to the inlet port. It allows for modularity versus the ones on GMs with the big ass casted body.
The post from the Accord I had mentioned earlier uses this model of m90. I found a video with more close-ups. They speak latin/spanish though so I have no idea what they're saying.
Eaton M90 Gen 3 bolt pattern is different than the Magnuson MP62 on a Comptech S/C.
The 2.179” measurement is the MP62 Comptech. It seems the Eaton M90 5 Gen Supercharger May fit the Comptech shaft.
Yeah that's what I found too during my research. It's just a matter of how off are those measurements.
BUT the Gen 5 M90s all have an insanely large inlet. Fitment tolerances would be tight. You'd either need to fabricate a new elbow or cut off the inlet and fabricate a bracket from there.
From there it just comes to what you prefer and what's in your budget. BOTH will require some new inlet though.
It had to be made at some point for a specific application / time, right?
Although, I'm afraid it would be a miracle to find a specific salvage yard M90 with that exact input reservoir case without knowing what to look for, if it exists in mass quantities.
Blue = CT-E input shaft sealed & fastened (blower bracket) with 4 SHCS (6X35) & 2 SHCS (6X30?) to, Yellow = The input oil reservoir case held to,
Red = The impeller / gear assembly by the reservoir case bolts fastened to,
Green = the threaded supercharger impeller housing.
As previously mentioned I only found the Gen 5 Eaton M90 available on the Pontiac Grand Prix from 04-06. I haven't found other instances of when the Eaton M90 was used. At least not yet.
Assuming the snout fits (it has similar bolt pattern. just not sure on the bolt spacing) then the biggest issue is the inlet. As mentioned it's cast to the body and it can potentially cause interference issues.
Now, either it'll be JUST enough room to create a 90degree elbow for our TB or we'll have to chop that sucker off. That's assuming the snout fits.
Assuming the snout fits (it has similar bolt pattern. just not sure on the bolt spacing) then the biggest issue is the inlet. As mentioned it's cast to the body and it can potentially cause interference issues.
Are you referring to the M62 oil reservoir snout fitting on the M90 impeller / gear assembly?
Because that is what it looks like Acura TL Builder is measuring with his caliper above, the M62.
I have here an MP90 from 1991 Mustang/Camaro.
Eaton M90 Gen 3 bolt pattern is different than the Magnuson MP62 on a Comptech S/C.
The 2.179” measurement is the MP62 Comptech. It seems the Eaton M90 5 Gen Supercharger May fit the Comptech shaft.
How is the M62 snout oil reservoir, which the CT-E input shaft bolts to, going to fit on the above M90 impeller / gear assembly without significant modification?
How is the M62 snout oil reservoir, which the CT-E input shaft bolts to, going to fit on the above M90 impeller / gear assembly without significant modification?
you keep ignoring the fact that I mentioned gen 5 many many times
Just gotta scroll up and check. I'm in mobile now and the pics are in my PC
You will notice the snout has 4 bolts on top, similar to the CT, versus 5 that the gen 3 has.
My confusion is trying to visualize the vertical and horizontal fitment of the M62 snout onto the larger? Gen 5 impeller / gear assembly?
There is something I just can't see that you guys do.
My confusion is trying to visualize the vertical and horizontal fitment of the M62 snout onto the larger? Gen 5 impeller / gear assembly?
There is something I just can't see that you guys do.
compare the bolt patterns.
The CT has 4 bolts on top. Gen 3 has 5. Gen 5 has 4 and placed similar to the CT.
We have no evidence that the bolt spacing matches up but it has a similar bolt pattern.
The CT shares more similarities to the gen 5 in size and bolt pattern than the gen 3.
Nearly all my pics I posted is if a gen 5. The one TL builder has an posted is if the gen 3. Once again pay attention to the bolt pattern. The very center bolt on the gen 3 is the dead give away.
As previously mentioned I only found the Gen 5 Eaton M90 available on the Pontiac Grand Prix from 04-06. I haven't found other instances of when the Eaton M90 was used. At least not yet.
Assuming the snout fits (it has similar bolt pattern. just not sure on the bolt spacing) then the biggest issue is the inlet. As mentioned it's cast to the body and it can potentially cause interference issues.
Now, either it'll be JUST enough room to create a 90degree elbow for our TB or we'll have to chop that sucker off. That's assuming the snout fits.
We need someone with a gen 5 to measure the bolt pattern against our MP62s.. know anyone?
I couldn’t find any Eaton Gen 5s for sale on Fleabay.
The M112 and M90 are interchangeable for the most part from my research... and the Jaguar does have a Gen 5 M112...
I'm also wondering---if porting of the CT's M62 is possible to accommodate the rotors of the M90. Similar technique is done to some turbos to accommodate a larger turbine.
05-17-2021 | 11:54 AM
