GT1

As the title says ... have any of you ever adapted a mr2 supercharger to a blow-through application on a 12A. I am considering doing it cause ive heard it can be done "fairly" easily, but i don't know details of the adaptation like best location, orientation... etc. I have enough knowledge and skill for the basic install and fabrication of it, but would appreciate any hints you may have on problems that will pop up, and any out of the usual parts i might need.
Thanks

peejay

It's be way too small, would be my guess. The MR2 engine is *much* smaller than a 12A yet has a similar rev range.

Manntis

smaller than 1.1 litres?

XLR8

iTrader: (52)

It is possible the 12a, being a rotary, could demand more air then a MR2 blowers could deliver.???????

peejay

A 12A displaces 1.15 liters per engine revolution.

A 4AGE MR2 engine displaces 0.8 liters per engine revolution.

Ergo, the 12A is 1.4375 the size of the MR2 engine, or 44% larger. Or, the MR2 engine is .6957 times the size of a 12A, or only 70% as large.

I would consider that to be a significant difference.

GT1

thanks for the info ... do any of you know of an adaptable stock s/c from other vehicles that would mate well to the 12A?
Thanks

Bridgeported

As peejay said, the MR2 SC is much too small! The 12A displaces a lot more air than the 4agze, plus most MR2/Corrolla guys with that engine complain about the stock SC being so crappy (small and inefficient).

If I was ever going SC, I would only use a centrifugal type unit. Roots can suck on it. Not sure of any stock SC's that would be suitable for a rotary.

What about a supercharger from a 3.8L Pontiac V6, as found in the Bonneville and Grand Prix cars? Just a thought.

Manntis

Yup, that makes sense. Didn't realize that the MR2 was such a minute displacement

REVHED

It's not really... the 4AGE is actually a 1.6L engine. It's just that rotaries displace their full capacity every engine revolution much like a two-stroke piston engine. This means a 12A should be refered to as a 2.4L engine when making direct comparisons.

MIKE-P-28

iTrader: (1)

I like how you dont know where to put the charge or orientation thereof, but yet it can be done easily? Sounds like it harder than it is...

Plus like they said I doubt it would server a good purpose for the work involved to do it

peejay

I personally wouldn't bother with a supercharger on the rotary. Too much stress on the end of the E-shaft, and besides, as one person put it years ago, "The best way to quiet a rotary is with a turbo!"

ccauley

I want an SC because it's not not a turbo like everybody else and i like low end for the street. i like the idea of something out of another model car.

i know this is aold thread but if anybofy has more detailed suggestions i wouild appreciate it. SE/REW

brandon davis

iTrader: (3)

You can have low end on the street. Just get a smaller turbo. Youll loose top end but hey you want low end.

96scoob

Well if your looking for somthen from another car the mini cooper s supercharger? For good small turbos cruise NASIOC.com and chec the unibombers manifesto. Subaru has some great little turbos tht spool very nice. And for the rev issue on a 4age the can rev very very high. My buddys stock MK1.5 goes into 7000 rpm range easily and now hes got a modified ecu with the rev limiter set to 8800 rpms which it achieves very easy. So those motors rev very easily if you still are looken at its s/c. It can handle those revs.

ccauley

so the mini cooper supercharger can be modified to work? Is it big enough? It's not that i don't like turbo's i just don't want one. Everybody has one is the issue. i want my 1st gen to be different but still perform well on the street.

84stock

iTrader: (5)

The issue with these superchargers is that they are not really blow through. If you wanna blow thru your carb you need something like a paxton. The mr2 could work, hell I missed one at the wrecker by 15 inutes, DAMN! They function much like a baby roots with twisted rotors and need to have a carb or throttle body before the charger. Thus, you would to ideally run efi with a throttle body prior to the charger. If i had scored this I would have mounted it on my stock gslse, net result would have been improved throttle response and lo-mid torque with no change at all on topend. For cheap power and good torque go as suggested with a turbo. Get a stock s4 turbo exhaust manifold and oval the holes to fit (or better yet a stock 12a turbo exhaust manifold if you can ever find one). Next get some skilled fabricator to make an adaptor to space the turbo out and get a Ford T3 turbo, this is an all in one unit with build in wastegate and can be found cheap (i have 2). This turbo would be small enough to spool quick and give good response and midrange with little lag. Then, when you want more do the cheap t3/t4 hybrid upgrade and get more top end if you want.

ccauley

Everybody says turbo turbo turbo. Exactly why i don't want one. Everybody has one. I will be doing EFI on my SE and i want to add an SC. guying a used one at a salvage yard would be cost effective. I just need to know which one to get and what needs to be done to make it work.

Thanks

Booyah

I dont have one =(

Would love to get one but I just dont have the tools to fabricate all the parts myself.

ccauley

I have a lathe and a milling machine but there are so many projects to work on

jfachner72

I was under the impression that you couldnt do blow through with the GM or Ford 3.8 liter superchargers because of the teflon coatings on the lobes......

I say build a sweet 13b 4port with a mild port job.....

Jason

ccauley

I already have a 13b/REW(4 port) street ported waiting to go in. I just finished the RB race exhaust. Another reason i don't want a turbo. I'll be working on installing the engine soon. First i need to put my rear axles (bearings and collars as well) and brakes (new rotors, pads and ss lines, calipers (rebuilt)) back on and the new fuel pump (MSD). But for now i'm doing the research for the next step, a new EFI and SC so when i'm done installing the new engine i know what i should buy.

96scoob

i dont know if a mini cooper s/c would work but thats somethen to look into.

ccauley

dude,

the photo of your car says "SE supercharged". You must be the guy i need to speak to.

Tell me more.............. How, what, how much, etc.....?

Get in touch, thanks

Kentetsu

My wife drives a minivan with the MR2 supercharged motor in it. I swear it has to be one of the fasted minivans on earth. lol.

twinkletoes

iTrader: (17)

Haha^ thats pretty cool. Camden is a great for the rotary. Cost a lot but work. Search for glazedham and kims fb on youtube and you'll see. Its pretty sweet. I wnat one someday. Constant whining from the supercharger is awesome.