i just got a supercharger (eaton) off a ford thunderbird super coupe for like 50 bucks!! i got all the pipes and the intercooler. i was wondering if any one has done this set up on a 12a? i was going to put a pull through carb on top or something else maybe i really don't know. i have to get my own pully made for it (not a problem) and all the brakets. let me know that you guys think.

 

that sounds really cool i wanted to do that, but your gonna have to mess around with different pulley sizes so maybe try pulling off all the stock pullies from the ford and have adaptor spacers made to mate to the front of the fb pullies, whats the displacement for the supercoupe? doesnt rotory displacement use an extra1/3 intake air per liter? take that into consideration too, and good luck i know stuff like this has been discussed before not sure about this exact setup but for encouragement the intercoolers off those are huge, i have one made of 2 supercoupe cores, im using it on my turbo 12a buildup


paul

 

Nice!

That's an eaton M-90!

It's a bit of work to get one on, but I say go for it!

I have big EFI SC project in the works...

 

If the 2nd gen guys see this thread, they will flame you really hard since it isn't a turbo. Ignore the inefficent hairdryers the T-II's came with and just pretend they have potential. I don't see an issue with the M90 though it you want a nice small gain. At Sevenstock this year I learned that the white Mazdaspeed RX-8 that was in Speed magazine last year used an M90 Eaton blower. We all knew it was a roots blower but which one was a subject of debate. People complained because it only produced 262 fwhp but what most don't know was that this was on the much smaller port 4 port Renesis engine. That engine has way less port area and timing than the 6 port Renesis. It did this at 9 psi with an engine bay mounted air/air intercooler. Not too bad. You may not have a Renesis but the point is that the blower can flow that much air. Most of the 2nd gen guys do the conversion way wrong ignoring alot of important airflow issues and then they blame the blower. Just because it is a blower does not mean you can plumb it any way you want to and get the same results for each setup. Not even close. For a nice upgrade over stock it's a great thing to do if you have the skills to fabricate what is needed. It's no harder than retrofitting a turbo/intercooler system in spite of what anyone says. Obviously it won't get you 400 hp but you'd really have to pay for that and a turbo for the price of that blower won't do it either. Go for it. Just tune it right.

The biggest hurdle for you will be with your carb. You can't blow through the carb with a roots blower but you also can't draw through a carb on an Eaton blower as you can other roots blowers. It wasn't designed for it. You will need to change to FI or use a different blower.

 

sometimes i hate reading your posts because if you can worm in a "your screwed" you always do it at the end of a small book...lol

 

Yeah, 2nd geners hate the SC...
Ah well, they drive UGLY tanks anyways...
And thank you for saying it's not that bad to set up
Mine's going to be fairly elaborate set-up, but I discarded 2 pefectly workable, much simpler set-ups befoe I decided to go crazy

Is the reason you can't go draw-through becuase of the teflon coated rotors?

 

rotarydoc

If you decide to sell 'cause rotarygod says you can't go carb, I'll buy it off you... $75+ shipping fo JUST the blower...

If you decide to keep it and go with FI, I've done a lot of planning and research, so feel free to ask...

 

If you've got the teflon coated rotors, you have the older blower. It can't be drawn through for this reason. If the teflon comes off, it won't boost as good due to excessive leakage, They had 2 different units on that car. The later one did not have teflon strips so you might get away with draw through with them. The older blowers are much less efficient. The inlet is the biggest issue on them compared to the newer ones and is one reason why they aren't as efficient as the later ones. Even the later ones on the T-birds has since been improved with further inlet/outlet changes to improve efficiency but they didn't come on the T-birds.

If you decide to use the stock T-bird outlet piece, just plan to either mod it or throw it away and make a new one. This is one of the first things that needs to go as it is terrible for flow and really hurts power output. Alot of the T-bird guys replace this piece.

I have an older M90 sitting here. I've found that it can very easily be mounted sideways to a T-II upper manifold by simply making an adapter plate and bolting it on where the TB used to be. Then fab up an inlet around the back. Simple for those using fuel injection.

 

I think I heard somthing about Teflon not being good for drawthrough, but I thought teflon was supposed to be non-reactive...?


Hehe... Mounting the SC to the stock manifold was my first idea
My second thought was to use a Racing Beat Holly lower manifold and adapt that...

Now I'm planning a REALLY ellaborate IC setup...

 

It's my understanding that fuel will want to condense on the teflon.

 

Ah...

 

If you look at the front of a Racing Beat catalog a few pages in or so you'll see a picture of an old roots supercharger mounted to an adapter plate on top of a stock manifold. You can't just bolt it on as the engine tilts up but the carb is fairly flat. You'll have to make an adapter that is taller in the rear to compensate so your belt will line up. A nice small plenum attached to a modded Holley carb would be really nice.

You would think teflon would be nonreative but supposedly it will slowly melt with fuel contact. You'll have to look into that or try it at your own risk.

I just looked at my supercharger. Maybe it was the later ones that had the teflon strips? Either that or mine is messed up. Could be. It needs repair anyways which is why it just sits around. I'm a little confused now but it was one of them.

 

Only blowers from 94 and 95 had teflon coated helixes.

 

Cool. That settles that.

 

Cool, now I know....

None of this really effects my planning, but it's good to know all the same...