Upgrade M62 to a M90 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-20-2003, 04:16 AM   #1
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Default Upgrade M62 to a M90

Is it possible to upgrade a 95 Series1 M62 SC coupe to a 98 SeriesII M90. If so what mods need to be done or is it a direct fit
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Old 02-20-2003, 05:15 AM   #2
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If you're talking just the supercharger, it'* going to be tough. Probably not economical. The M90 has a longer nosedrive, different footprint, larger porting, you'd need a larger throttle body which would likely require you to re-flash your PCM, and you'd have to adjust the distance of the AC pulley and the idler to mate up with the belt path of the M90'* longer nosedrive. Some sensors may need to be swapped, as well. You'd need the lower intake, and it won't mate up to your heads due to the valve sequence difference between the Series I L67 and Series II L67. Much the same as the difference between the L27 and L36.

If you're talking about the drivetrain itself, about the only thing the same is the block and pistons. The intake and exhaust valve sequence changed between the 95 and 96 L67. This means the cam and entire valvetrain are different (same components, different location), the heads are totally different, the lower intake is different......and on and on.

To do this the right way without swapping the entire drivetrain (or just the motor) you'd need the cam, heads, lower intake, M90, exhaust manifolds, and PCM re-flash.

Sounds daunting, doesn't it? If the full drivetrain is your goal, go to www.l67swap.com these guys are just starting to pull resources for transplants into all different types of cars.....Berettas, Grand Prix, Cavalier, Fiero, etc.
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Old 02-20-2003, 05:22 AM   #3
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And welcome to the forum! I left that part out

We've got some great resources here. I like to steer new members up to the Techinfo link at the top of the page when they get here. Also, take some time to fill out your profile, especially your signature, so we know what you have under your butt when you're driving. Year and model. Too many cars to keep track of

Have fun with us!
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Old 02-20-2003, 03:28 PM   #4
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welcome
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Old 02-20-2003, 09:29 PM   #5
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Yes you can but the cost is greater than swapping in the rest of the engine along with it. If you are willing to talk for awhile call me at 559 709-4127 and I will explain.



Ty
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Old 02-20-2003, 10:44 PM   #6
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If you have the money and the time, he'll talk your ear off, and you'll be driving a v8 rwd bonneville next week.

But it'll work, and it'll go stupid fast

Ty is the absolute never-ending source for 'the impossible'. He'* figured alot of crap out, and he has the best brakes in town!
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