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Old 07-15-2009, 07:55 AM   #1 (permalink)
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Default M45 >>>> m62

so, I am running a M45 with the good old water to air intercooler, power card, small nose pulley, big crank pulley, FM o2 clamp... I want to upgrade to M62 and I am wondering if i can just swap to blower? i know the mounting of the super charger is different because of the size of it, right?

the blower it self for the NA and NB kit are the same right? If i just swap the blower, can I still use water to air intercooler, power card, small nose pulley, big crank pulley, FM o2 clamp? Do I have to upgrade all of them together?
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Old 07-15-2009, 04:10 PM   #2 (permalink)
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Default Re: M45 >>>> m62

pulley's are different because its a 6rib setup
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Old 07-15-2009, 05:15 PM   #3 (permalink)
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Default Re: M45 >>>> m62

I came into this topic expecting a statement about someone liking the m42 over the m62. I cannot help further.
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Old 07-15-2009, 09:13 PM   #4 (permalink)
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Default Re: M45 >>>> m62

I can't help with fitment, but the O2 clamp, powercard etc. can all be kept.
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Old 07-15-2009, 10:05 PM   #5 (permalink)
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Default Re: M45 >>>> m62

Quote:
Originally Posted by Simon.Lee.K View Post
so, I am running a M45 with the good old water to air intercooler, power card, small nose pulley, big crank pulley, FM o2 clamp... I want to upgrade to M62 and I am wondering if i can just swap to blower? i know the mounting of the super charger is different because of the size of it, right?

the blower it self for the NA and NB kit are the same right? If i just swap the blower, can I still use water to air intercooler, power card, small nose pulley, big crank pulley, FM o2 clamp? Do I have to upgrade all of them together?
You asked alot of questions.

If you are going to use an M62 (3rd gen blower) then all of the mounting hardware will need to be custom fabbed. To make the my answer more confusing there has to be a TON of combinations you can use for your M62 build up. Some folks use a M62 clutch type from Mercedes, some use GM units that have factory made plenum's and casings. Eaton also manufactured universal units that are easier to bolt in for any custom applications, they are difficult to find. You are only going to see M62 units with 6-rib pulleys. You will have to obtain new pulleys (which can be had) and develop your new pulley ratio. I suggest not running a blower speed past 16k RPM. Keep in mind your boost will be totally dependent on your volumetric efficiency. They run nothing like turbos. You have to decided if you are going to run your blower throttled or not. Some units use a vacuum bypass and some units use clutch. If you decided to use a MP62 (like you find in current Miata kits) then they have an integrated bypass which is supposed to provide better flow apparently. If you do choose a M62 you can use any 62 cuin blower nose. Therefore you can change in depth of the nose. M62's are obsolete to my knowledge. I believe that Eaton is working on a 7th gen blower at the moment.

If you want to know what goes into custom mounting a M62 to a 1.6 er 1.8 then you should keep a close eye on my build in the projects section of this website. I will resolve all the issues for you to decide if this is something you want to undertake.

As far as your second set of questions....the NA and NB kits should be the same (if you are talking about BP). However they are not the same in bracketing due to PS,AC etc. All of your other bolt-ons should work except if you are using custom mounting hardware then your charge plenum will come out at a different angle. The Power card should not matter. Just be concerned about how you are going to mount a M62 to your car because there have never been M62 kits made for any Miata....M45's all day long.

PS....if you are going to step up to a 62 cuin blower then ditch the air to water intercooler.
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Last edited by BracedEunos; 07-15-2009 at 10:08 PM.
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Old 07-15-2009, 10:23 PM   #6 (permalink)
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Default Re: M45 >>>> m62

Sell the M45 and get the MP62 all the brackets are slightly different and you will end up having to buy parts piece by piece (which can be expensive).
You can keep the intercooler though... (after modifying the charger pipe )
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Old 07-16-2009, 08:15 AM   #7 (permalink)
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Default Re: M45 >>>> m62

thx every one. seems like a very expensive task...
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Old 07-16-2009, 02:19 PM   #8 (permalink)
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Default Re: M45 >>>> m62

Why didn't you just go with the 62 in the first place?

The only reason to get a 45 is if you're going to install it and never touch it again. It runs out of performance potential much quicker and the more band-aids you throw on it the more things go wrong. Plus, depending on how many "performance adders" you put on it you could actually LOSE power.
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