is it remotely possible for us to take the m62 and swap it out for lets say at least a m90? i have seen a couple of them on ebay and also some m112s. this would be a sick mod and not too expensive under 1k without labor. somebody let me know.

 

Look back in some of the posts. I think there was one that explained your question.

 

M90 would be fine. Would need an adapter plate

 

what would the advantige be to swaping out our m62 for an m90 or m112

 

I believe from what the other topic like this is that the M90 will use MORE power from the engine to spin the supercharger. I believe the M90 requires about 44hp to spin the supercharger and the M62 requires about 28-34hp. Now the main question is if it's worth it. Yes the M90 puts more air into the engine, about 570cfm and uses 44 hp to spin the SC and the M62 puts about 380cfm into the engine and uses between 28-34hp to spin the SC. So if we could calculate the difference in cfm and difference in hp to spin the SC and how much we could gain from it we can conclude if it's even worth the money for maybe 10hp more tops I would guess. Not too sure

 

It would work better as a high end upgrade after all stages, CAI, full exhaust, valvetrain, etc. I don't think it would be practical until you are hitting the limits of the M62.

 

You already are at the Limit's of the M62.

I've asked before but no one seemed to know. What size crank pulley is on the LSJ? I need it to calculate supercharger rotor speed.

Pretty much anything over 12000rpm is just hot air.

 

The stock pulley on the M62 for the SS/SC is 3.4" I believe.. and the M62 is suitable for up to a 4.0L engine

 

6.375" is what I got on the crank pulley, I think someone else measured around that too.

 

if i remember the M90 wont fit the cobalts , according to magnason

the M90's rotors are bigger around , which makes the case size of the M90 bigger than the M62 , which already has limited room on the cobalts

the redline has a better chance of it fitting , since the core support is a few inches foward

 

I really wish i owned an SS. I'd love to be the first to do a blower swap.

 

Since I am new to the Ion and SS forums, I never saw this other thread relating to HP to spin a SC.. Wow, even on the order of 5HP to spin a device is high. The AC compressor in the old days was strong enough to pull a 350 cu in motor down 300 RPM's. We dont see these problems near as much today however. We typicially quoted the AC pulling 20HP from an engine.

The SC is very free turning, but drag does occur as you spin it faster. However, if you are making more power, then the drag is worth the extra cost.

The M90 and M62 is explained correctly above where they try to indicate cubic volume. I dont really know the exact measurement number, but M62 is volume, and M90 is volume of cubic air it can move. There is a limit to the RPM you can spin a SC before it is making noise, and no more power. 12000 RPM is thrown around alot on the forums, so most will use this number. There's a company in Grand Rapid MI that has built a SC dyno. They test the air flow at various loads and RPM's.

I have been working with the 3800 SuperCharged engines for about 6 years now. It has the M90, and we have Gen 3 and Gen 5 versions of this M90. The M90 can be upgraded to what is called the Hybird M112 conversion. We take a M90 and a Ford Lighting M112 and mate them together.

Adapters can be made for anything with enough time and money.

I install 3800SC engines and transmissions to Fieros. I just purchased a LSJ 2.0L supercharged engine and 5 speed transmission to put in a Fiero.

Here is some of my work http://www.fastfieros.com/projects



Hopefully I can contribute to this forum, and the 2.0l engines.. I use to build 2.5L engines that were not designed to make power, but I took these from 90HP to 205HP .. Very expensive with no SC or turbo... All motor on 173 Cubic Inches..

Loyde
http://www.FastFieros.com

 

That's awesome.... here is that other link https://www.cobaltss.net/forums//showthread.php?t=6851

 

Here is the M112 converted from a M90.. Makes big power..





I am in the process of reading the other thread now.

Thanks,

Loyde

 

Yes it would be worth it to swap. There are many Grand Prixs that come stock with the M90, and swap for the M112, and have huge gains. So even though it takes more to spin it, you still get great gains.

And the pulleys you guys use are getting pretty small. From 3.4" to 2.8" is a big jump. I doubt you can go much smaller than 2.6" without machining the snout. So I would say your are getting close to making the blower.

 

dam those are sweet looking blowers


im really suprised no one here has 1 on their 3800 gtp yet , the quckest gtp here was a 12.7 , now that he rebuilt the motor he is having traction issues , plus his slicks were wore out

 

What do they mean by "huge" gains? Are they seeing like 30+hp from it or something? (Hope that's not taken the wrong way, not trying to be a jerk).

 

Ok guys, I stand corrected on my thoughts... The SC dyno guys do confirm that it takes a good 25+ HP to turn a SuperCharger.. I never thought it withdrawn that much from an engine.

They also indicate some testing has been done on the M62 for the LSJ, and it is quite capable of handling HP up to 300+..

Learn something new everyday..

Loyde

 

House of Speed here in Houston said the same thing to me. They're business is roots blowers...they do a lot of GTP, Lightning, 03-04 Cobra work. Good to know others out there think so as well.

 

Thank's for offering to help on SC related questions! We need all the help in the world right now and Welcome to Cobaltss.net.

 

Jeez, I wish I still owned my Fiero...

 

http://www.clubgp.com/newforum/tm.as...mode=1&smode=1

Thats a link to a GP who replaced the M90 with a Whipple blower, with track times. A stock GTP in good shape will run ~14.3 or so. So he dropped a full second with the blower, intake, and slicks.

Just shows the potential of JUST replacing the blower. (well I say just, only because theres no way you can contribute much of that gain to intake/slicks)

 

Can't really compare an M90 with a 2.3L Whipple twin screw. 2 Different animal's

 

How did you get a black car with the yellow inserts? Is that a factory choice?? I thought you could only get yellow inserts with yellow exterior.

 

no thats two different animuls (the GP guys here will get that)


Loyd (fast fieros) knows his stuff. Ive been preaching m90 swap since the first day i got here (that and PCM changes, and scanning). Im sure Loyd will probably be the first one to test the m90 on the LSJ and you all will believe the joys of an upgraded blower.

*OFF TOPIC*

Loyd, did you get the LS4 from the guys in SA? I want to see pics when you swap that bad boy in!