Supercharged 3.4L
Joined: Feb 2008
Posts: 6,465
It is possible and has been done.
The problem is that it isnt an easy bolt on. The 3800 and 3400 are completely different engines, so you cant just bolt the parts on and go.
I've seen it done 2 ways with an actual M90:
1) Hack up the 3400 UIM to mate the bottom of the M90. IMO this isnt visually appealing and the couple I've seen end up with a few bolt holes they cant use at all and the blower is hanging WAY out of the hood.
2) Have a replacement UIM made that allows a M90 to bolt to a plate adapter. This can look cleaner but obviously is more expensive. The blower still ends up sitting very high.
One similar alternative:
-There did used to be a blower kit sold that used a SC very similar to the SS's M90. It used a MP90 mounted about where the airbox goes. They used a long extension shaft to get the pulley across the engine bay and dumped the outlet of the blower into a collector manifold to pipe it up to the to stock UIM. I dont recall ever seeing this sold for or installed on a monte though, I think this was aimed towards the Grand Am crowd. The obvious difference I saw in pics of the kit was that they didn't have the 2 upper engine mount 'dog bones' as the blower snout went right through that area.
If I could offer a suggestion, the cleanest way to do it is just swap the whole SS SC engine. L67 engines are relatively cheap and fairly common in junkyards. This would certainly be cheaper than most of the options above (except maybe the hacking up the UIM option, depending how much you DIY'd it).
The problem is that it isnt an easy bolt on. The 3800 and 3400 are completely different engines, so you cant just bolt the parts on and go.
I've seen it done 2 ways with an actual M90:
1) Hack up the 3400 UIM to mate the bottom of the M90. IMO this isnt visually appealing and the couple I've seen end up with a few bolt holes they cant use at all and the blower is hanging WAY out of the hood.
2) Have a replacement UIM made that allows a M90 to bolt to a plate adapter. This can look cleaner but obviously is more expensive. The blower still ends up sitting very high.
One similar alternative:
-There did used to be a blower kit sold that used a SC very similar to the SS's M90. It used a MP90 mounted about where the airbox goes. They used a long extension shaft to get the pulley across the engine bay and dumped the outlet of the blower into a collector manifold to pipe it up to the to stock UIM. I dont recall ever seeing this sold for or installed on a monte though, I think this was aimed towards the Grand Am crowd. The obvious difference I saw in pics of the kit was that they didn't have the 2 upper engine mount 'dog bones' as the blower snout went right through that area.
If I could offer a suggestion, the cleanest way to do it is just swap the whole SS SC engine. L67 engines are relatively cheap and fairly common in junkyards. This would certainly be cheaper than most of the options above (except maybe the hacking up the UIM option, depending how much you DIY'd it).
Last edited by bumpin96monte; Jul 29, 2019 at 11:52 AM.
Joined: Oct 2009
Posts: 4,159
From: Coal City,Il
People say its not possible in this thread but as bumpin said, it certainly is possible..
https://montecarloforum.com/forum/en...-3400-a-40971/
Joined: Feb 2008
Posts: 6,465
Had a chance to run down some more pics. A few are duplicates of the thread above.
Most of the GA stuff is the remote mount blower, but TBH that's not going to make a whole lot of sense to recreate unless you can find a complete kit for sale used.
Last edited by bumpin96monte; Jul 29, 2019 at 12:07 PM.
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