Moss motors gets $4695! for a Eaton 45 supercharger kit for an MGTD. It’s reported to kick the power up from 54 to 75 and that sounds like it would be fun. I’ve been shopping for one but apparently Miata buyers have driven the price up to over $500 around here
that or the junk yards really like Mercedes parts .
First-generation Mini Cooper S
What about using an M62 instead? More common and cheaper........
http://www.mg-tabc.org/supercharger/eaton.htm
In reply to DeadSkunk :
OK , but isn’t that too big for the little 1250 cc MG motor? Plus it needs to fit under that narrow hood?
I’ll be glad to check it out though what cars can I find it in?
In reply to chaparral :
Thank you.
In reply to frenchyd :
It probably is too big . I think 1600cc for everything. not 1250cc. I forgot how small those engines were. The M62 is the unit used on early 3800cc GM v6s, common as dirt, and cheap. There is also an M90 version, bigger still. Just search "supercharger" on Craigslist and several should show up. One of the MGs in that website I posted had the M62, but I'm not an MG expert so I don't know what size the engine was.
Can you not just spin a larger one slower? I don't speak supercharger but I would assume that would work..
In reply to frenchyd :
Do you want a Garrett GT1241 Turbo? I have a genuine one that I got for a project that is no more. It is sized perfectly for a ~1.0L engine
http://turbochargerspecs.blogspot.com/2011/02/garrett-gt12-gt1241-130-hp.html
In reply to 8valve :the trouble with bigger is two fold first the physical size “ oh is that a motor hiding behind the supercharger? And no it won’t fit.
Second I’m not sure the engine has enough power to spin the supercharger. Peak horsepower is 54 At an idle? Maybe 6-8?
In reply to singleslammer :
I’m sorry but a MGTD is a classic car. The Eaton sort of gets a pass because it somewhat looks similar to superchargers of the 30’s40’s&50’s. These cars used originally.
In reply to singleslammer :
PM'd you about that Garrett.
8valve said:Can you not just spin a larger one slower? I don't speak supercharger but I would assume that would work..
If you spin it too slowly then it leaks air and the efficiency goes down, plus it's bigger and heavier.
M45s were used in a lot of early Miata supercharger kits. They're really too small for a 1.6 (and especially a 1.8) Miata motor, so they can often be had relatively cheap on Miata forsale sites. :)
If you can find the right pulleys to underdrive the blower you can use a bigger unit like an M62. Yes, there will be some increased friction in a larger unit, but the real issue is how much pressure it builds. Depending on the engine's compression ratio (I'm assuming it's low by modern standards) you can just adjust the boost down to suit. Here in Michigan I can find GM blowers for $100. At that price I'd give it a go. (Says the guy sitting in his armchair.)
The 62 cubic inch blower is still smaller than the 76 cubic inch engine, too !
Look at the charts in here (www.onallcylinders.com/2013/02/15/blower-basics-part-2/ ) to see how underdriving the blower drops the boost.
8valve said:Can you not just spin a larger one slower? I don't speak supercharger but I would assume that would work..
It would "work" but there are efficiency curves in play. Even though they are positive displacement devices, they flow the best only in a certain blower RPM range. The amount of boost you are running also factors into it. Volumetric efficiency goes down as boost goes up because it is not a compressor, the air trapped in the lobes is at atmospheric (less than atmospheric, technically) until the passage opens up to the manifold. This is kinda where some of the voodoo with the pre-opening slit ports that Eaton developed comes into play, it allows some of the manifold volume to bleed into the lobespace before the main event so that the pressure change is more gradual.
Anyway, there's charts and stuff, it isn't as easy as one revolution = 45/62/90/etc cubic inches under all conditions.
Not an M45 but the Aisin AMR500 is about the right size (500cc/30.5ci) for your application, tiny, and can usually be found pretty cheap on ebay.
In reply to RXBeetle :
Thank you, what cars had them?
I thought a Mercedes used the M62.
In reply to dean1484 :
Maybe the six cylinders did. But I need the small one, after all it’s only working on a 1250cc engine designed in the 1930’s
RXBeetle said:Not an M45 but the Aisin AMR500 is about the right size (500cc/30.5ci) for your application, tiny, and can usually be found pretty cheap on ebay.
These look like they came on Japanese Kei cars. You can buy a new one from several places online (might be fakes) and many used ones on ebay.
What supercharger is on the Mazda Millenia?
Honestly couldn't find much info as far as applications in a few minutes of practicing my google-fu. All I found was this:
That supercharger is used on 1L or less engines in japan. They flow pretty low cfm, but very small in dimensions. Something like 16cm l x 11cm w. They use a 1" outlet iirc. I was looking at them a while ago and people want 250+ for these little guys which is way too much I think. Considering you can find any of the eatons; m45, 62 for that price or less.
Nissan made one bigger than the subaru version aswell
Also saw a few posts about finding them possibly on air-cooled VWs.
Finding one in a junkyard probably wouldn't be easy.
In reply to RossD :
Courtesy of Roadkill:
IHI Twin-Screw
Where to find it: 1995-2002 Mazda Millenia S
Boost potential: High
Dimensions 20″ long, 6″ wide, 5″ tall
Junkyard Extraction Hassle Factor: Medium
Awesomeness Factor: Extremely high
MINI M45's aren't terribly expensive to find used, but you do need to look for why it's being sold. Often t here's nothing wrong with the supercharger side as what commonly fails is the water pump gear drive. The seal to the impeller case fails and sucks out the gear oil. The gears then strip from running dry, the water pump stops and if the owner doesn't see it in time, the engine overheats. However, since these kits don't use the gear driven water pump, the failed gear usually isn't an issue. There is a similar kit for the Mini A-series engine.
FuzzWuzzy said:In reply to RossD :
Courtesy of Roadkill:
IHI Twin-Screw
Where to find it: 1995-2002 Mazda Millenia S
Boost potential: High
Dimensions 20″ long, 6″ wide, 5″ tall
Junkyard Extraction Hassle Factor: Medium
Awesomeness Factor: Extremely high
These are WAY overkill for this engine. They displace 1.2L. bigger than the M62
You'll need to log in to post.
