Topic: Cheap Supercharger

[mack90]

I came across these low priced rebuilt superchargers on ebay.  They look like the ones the avenger kits were using.  Any ideas on making them work?

http://cgi.ebay.com/ebaymotors/EATON-M90-SUPERCHARGER-JEEP-DODGE-CHEVY-HONDA-TOYOTA_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1171Q7c66Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem390042722157QQitemZ390042722157QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

[jfrabat]

Well, THIS looks interesting...  Just keep in mind that you will need some other mods to make it work (from what I have read).

[Bikerjr1]

$399.00 sure beats $2500.00.  I might can even justify this one.
JR

[Jeffy]

The biggest problem is getting into a manifold.  I think you'd have to buy a Offy from Clifford and make an adapter.  Rimmer Engineering used to use the E90's on their 4.0L kits and the E65's on their 2.5L's.  For simplicity, I'd go with a centrifugal SC though.  The install would be a lot easier.  It wouldn't boost up at lower RPM's but should give you more power when you really need it.  No need to route the exhaust like with a turbo but otherwise the same.

[Bikerjr1]

If I remember right back in the early 80's didn't a couple of the car mags do some articles about using some of the smog pumps as a supercharger for the smaller engines.  Those engines were about the same size as our 2.5Ls.  I'll have to see if I still have any old Hot Rod mags around that have an article on it.  I want to say they were using import inline 4s.  I guess it would be too easy to find something that would bolt up where the AC compressor is and run the same belt.  It would sure be nice sitting on the small stroker motor.
JR

[toesnthewind]

Hey guys. First post here. I've been playing with this idea for awhile. The Eaton M62 would probably be a closer match. It pumps 1 liter of air per sc revolution. These superchargers generally run at twice crankshaft speed so the gain would be 2 literes of air per engine rpm. This should easily make 5-6 lbs of boost. The M90 pumps (1.5 liters x 2) 3.0 liters per engine rpm. With factory pulleys it may be too much boost.
I've figured out the mounting and plumbing. I think a blow thru installation like a turbo system would be easiest. These blowers normally use a bypass valve so no blow off valve would be needed. Still looking into the engine fuel supply (FMU, split second or ). I'll post some pics of the sc modifications I've done if anyone is interested.
BTW, I picked up my Eaton M62 for 10 bucks at a swap meet so I dont have much to lose.
Calvin

[Mr_Random]

Hey guys. First post here. I've been playing with this idea for awhile. The Eaton M62 would probably be a closer match. It pumps 1 liter of air per sc revolution. These superchargers generally run at twice crankshaft speed so the gain would be 2 literes of air per engine rpm. This should easily make 5-6 lbs of boost. The M90 pumps (1.5 liters x 2) 3.0 liters per engine rpm. With factory pulleys it may be too much boost.
I've figured out the mounting and plumbing. I think a blow thru installation like a turbo system would be easiest. These blowers normally use a bypass valve so no blow off valve would be needed. Still looking into the engine fuel supply (FMU, split second or ). I'll post some pics of the sc modifications I've done if anyone is interested.
BTW, I picked up my Eaton M62 for 10 bucks at a swap meet so I dont have much to lose.
Calvin

Wow ten bucks! cool, post a build thread if you want, it'll be sweet to see some more variety in power-adders around here!

[toesnthewind]

I dont think yall will live long enough to see me finish this project. So I'll post pics and maybe someone more motivated will get some ideas.
This is the Bonneville M62. It's too long in stock form. Needs a date with the bandsaw.

Cut it in half just in front of the bypass shaft


You'll have to tig acrossthe top of the the bypass channel so it will seal against the inlet flange.

Kinda half assed mocked in place. The belt lines up.


Temporary bracket with intake and outlet on


With the bypass removed it needs a blow off valve or an external bypass added. I'm going to use the bypass method.
Now I just need the motivation to finish it.

[Tr00b]

I wonder if this ever worked.

[sharpxmen]

i can tell you for sure that bracket will not last the way it was made (I dont even think you can put enough tension on the belt, the bracket will bend), as far as not running a bypass valve that wont work either. However, he seems to have made it so the throttle body is "behind" the s/c and not at the inlet which is not the way to do it (you make boost all the time for no reason, whereas with a turbo there's low exhaust gas volume once you close the throttle with the s/c you spin it anyway via the belt not to mention the case in which you go in engine brake, you'd be making a loot of boost there and will eventually over-rev the engine since you cant control it with the t/b anymore).

I have no idea why i didn't post something at the time, i don't think i've seen this post before though so it probably didn't appear in my "new" posts list.

It will make boost but in this layout won't work right or last

[RNandKT]

Am I the only one who thinks, putting a turbo or supercharger on these motors is just a bad idea?

I mean scrounge a donor 4.0 6 cyl from a wrecking yard for a small core charge, get it rebuilt long block for like $1200-$1500 (depending on what you put into it). Pick up a used AX-15 for a couple hundred (I have seen rebuilt ones around here less that $500) and from there it is almost plug an play minus some small details like moving the engine mounts, switching to a 23 spline t-case or switching the input shaft on yours (good time for an SYE) and having the drive lines adjusted.

Little pushrod 4 cyl with a whimpy tranny on either a turbo or supercharger is like giving a cheerleader an overdose of steroids, even if it works you won't like how it turns out.  

[Tr00b]

If done properly the performance can be increased and no major component swaps are needed. Honestly people whine about the AX5 but the Ford M5OD like was in my ranger died with normal use in a 2wd truck... and some Turbocharged rangers run 500 HP through the same trans!. My Ax5 is subject to towing heavy abuse grinding and other rev limiter type adventures and still feels rock solid and shifts better than an ax15 with quality fluid.

Plus if you are using the N/A internals you aren't going to be able to lay down huge boost before the  bottom end goes. Even on advance adapters they sell kits to put a V8 in front of an ax5. It can be done and has been done. I am sure sharp will chime in.

[sharpxmen]

price-wise to do it right the forced induction would get way more expensive thant a 4.0L swap and it's pretty straight forward but where's the fun in that , a stroker would def be a nice project.

AX5 is ok, but mine sucked since i bought it (didn't buy the Jeep new and had about 50k miles on it, it had bad syncros), aside of that i didn't have trouble with it but it can get annoying as i always had to double clutch the 2nd and 3rd, NV3550 is way better (i mean it's night and day as far as how it shifted compared to the AX5 even on the 4th 5th which worked ok). That being said i didn't blow any gears but i rarely used the 5th since i had stock gears with 33s.

[RNandKT]

Honestly I was not dogging the AX5, but I should add I have had 3 4cyl Jeeps and the AX5 is not bad but is notorious for trashing syncos and I have experienced that in 2 of them. But I also buy all my cars on a budget and am lucky if I am 2nd 3rf or even the 4th owner.

That being said I suggested the upgrade as part of the 4.0 swap. If you could have a the entire drivetrain rebuilt, twice the HP (almost), and a drivetrain designed for the power for the base price of adding a turbo or supercharger kit to a worn out drivetrain not designed for the extra abuse .... just does not make a lot of economical sense to me.

I do like the 2.9 stroker kits made for these motors. That with a cam regrind will not make the numbers of a turbo or supercharger or 6cyl, but is a large increase and not much more than a normal full rebuild. But again for me dollar for money is always number 1 priority, so thats why I like the 6 swap.

In my case I bought my TJ with 144k miles and a rod knock. And previous owner had paid to have tranny rebuilt already. So for me, I found a 2.5 with only 77k miles on it for $250 so in it went. A swap or rebuild would have been fun but I can do gears in it now instead and be far cheaper .... so in my case again cost for benefit always rules.

[dwtaylorpdx]

Just another data point,, I have transmission #4 in my YJ.. AX5.   
Only the second clutch at 200K miles.

The last rebuild has lasted the longest, the guy that did it was kind of specialized in
the Japanes Aisin variants, he pulled the inner shrouds off all the main bearings,
and since the rebuild I run 20-50 synthetic oil works great and shifts great..
 The same trans in a toyota version also uses a 20-50 synthetic gear oil form the factory..

Dave