Question about the MKI supercharger

[thesavage]

Hi. I was just on howstuffworks.com (great site for auto stuff, by the way) reading the article about superchargers and learned that there are three different types of superchargers. I was wondering what type of supercharger is on the 88-89 MR2s. The article stated that the centrifugal supercharger was the most common and most efficient, so I'm guessing that is what is on the MR2. Can anyone confirm this?

Also, I understand that having a supercharger puts added strain on the engine, so therefore the engine must be built stronger. I am wondering what is the difference between the 4A-GE and the 4A-GZE? Is the 4A-GZE built any differently (stronger) than the 4A-GE besides having a supercharger bolted onto the front?

Thanks for the help.

[yellow86MR2]

mr2 has a roots type charger.


Headgasket is stronger, lower comp pistons are used. Toyota bulit the 4ag motors pretty tough, they can handle the supercharger fine.


Martin

[thesavage]

Cool, thanks for the info.

[toyotaspeed90]

heads are the same.... they used thicker rods and the pistons are forged & ceramic coated.... they also used a larger flywheel and much stronger transmission

[thesavage]

But you could still put a supercharger on the 4A-GE without causing too much strain right?

I'm not saying that I'm necessarily gonna do this, as I would much prefer an SC MR2, but I'm just trying to keep my options open.