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-   -   Supercharging is it worth it? (https://www.rx7club.com/1st-generation-specific-1979-1985-18/supercharging-worth-1070303/)

plentymoon 08-26-14 04:29 AM

Supercharging is it worth it?
 
I'am searching the forums for such threads on this but haven't found much just yet really.

ok as the title ses is it worth it to make a supercharger setup? what type of charger should I use? I know these engines are a 1.1L but are compared to as a 2.2L. we have already taken just about everything lagging the motor as it is off and we are not looking into anything that's instant but can make the car a little more fun then just porting it out even though it may still have fairly low mileage.

me and a buddy plan to take my car offline this fall through winter to fix somethings and upgrade some parts with newer shinier things to add some extra power.

now the engine I have now runs like a freaking beast and can get me going pretty fast (or how I feel while driving down the mini highways flying past all the normal commuters.) Anyways fuel mileage is not much of an issue for me since work is like right around the corner so I can just walk cold or not.

If we take on this ind of challenge would it be a bit simpler to do on stock ports some exhaust upgrading, timing and ignition (already done with upgrading some of ignition) getting a blow through carb setup.

and the all mighty thing fuel and some extra work with the carb itself to handle and maintain power under boost itself.

its something we have been talking about for awhile though I have a shop so its not gonna be sitting outside in the snow or anything.

are plan is to make 5-6 psi of course don't wanna get crazy with power cause I don't wanna blow a tranny or the motor for that matter (or not right away anyways lol) money is not to much of a factor and time is up to us entirely since every weekend our rotary club meets up anyways.

its not a build that is just gonna happen there is gonna be a lot of planning for this so we don't fuck up I guess now my buddy is a college kinda guy in mechanics so he is far more knowledgeable on boost and cars and diesel for that matter and has training and equipment for fabricating brackets and other things of the likes and far greater tools then my own and he does own rotary and understands them and is about as eager as any other guy with rotary and wants to see what he can make.

so happens I decided to use my car as the car to perform this operation. if a supercharger setup is not good enough we will do a turbo setup just because its been on the brain for awhile.

Flamers welcomed and ignored helpful information appreciated.

jgrewe 08-26-14 08:17 AM

Back in the early 90's a guy I crewed for threw together a supercharged 12A in an FB. The car was a blast to drive, it had torque from idle! The supercharger was an Eaton unit pulled off of a Thunderbird SuperCoupe. It used a carb and looked like it belonged on the car.

You can find Eaton SC's on a bunch of Buicks and Pontiacs in the junkyards. Either an M45 or M62 would work, check which car used which one. The problem is they breath through the 'back' because they are in FWD cars. Easy work around will a hole saw and a block off plate.

Have fun!

prophetjohn 08-26-14 08:37 AM

what bout a SC off a mazda millennium? i found one for $400 (whole engine actually) and have been thinking the same ever since.

DivinDriver 08-26-14 10:22 AM

Camden SuperChargers - Get a Supercharger kit for you're Mazda Rx7 13B Rotary

plentymoon 08-26-14 11:07 AM

unfortunatly i'm not that loaded if I put a camden on I would probably get divorced by my wife lol xD

but I have enough to get started on my own build with something cheaper that I can put together my self. but don't get me wrong i've had a few times to put that down on my credit card.

just don't want to now.

if anything I just wanna learn what I can and can't do I guess but boosting is the one thing people of told me and many others that we can do it even on stock ports and stock engines in general.

plentymoon 08-26-14 11:18 AM


Originally Posted by jgrewe (Post 11792149)
Back in the early 90's a guy I crewed for threw together a supercharged 12A in an FB. The car was a blast to drive, it had torque from idle! The supercharger was an Eaton unit pulled off of a Thunderbird SuperCoupe. It used a carb and looked like it belonged on the car.

You can find Eaton SC's on a bunch of Buicks and Pontiacs in the junkyards. Either an M45 or M62 would work, check which car used which one. The problem is they breath through the 'back' because they are in FWD cars. Easy work around will a hole saw and a block off plate.

Have fun!

and thx for the response JG I will look into those S/C's again maybe I should have kept mine off of my old buick regal. xD

[prophetjohn]: same with the mazda millennium S/C

this would be a winter long trial though since we want to make options for ourselves before its all said and done. because i'm still gonna be looking for more first gens to take home during that time so I can get spare engines to rebuild and port to make an even faster car. :D

jgrewe 08-27-14 12:14 AM

I have an M45 on my shelf that I pulled off a Buick Park Avenue. It was painted a color that one of the national rebuilders use so I knew it had been gone through. I think I paid $45 for it.

plentymoon 08-27-14 12:26 AM


Originally Posted by jgrewe (Post 11792578)
I have an M45 on my shelf that I pulled off a Buick Park Avenue. It was painted a color that one of the national rebuilders use so I knew it had been gone through. I think I paid $45 for it.


thats not bad. I will probably have to look this weekend for superchargers at the junk yards.

but a Mercedes Kompressor S/C won't work either or to small of Liters?

jgrewe 08-27-14 05:03 AM

Just check which Eaton unit it uses. I think the smallest one is the M45. 45 being the number of cubic inches pre revolution. It makes it pretty easy to figure out which one you can use. Either spin an M45 a little faster or a M62 not so much.

plentymoon 08-27-14 09:53 AM


Originally Posted by jgrewe (Post 11792631)
Just check which Eaton unit it uses. I think the smallest one is the M45. 45 being the number of cubic inches pre revolution. It makes it pretty easy to figure out which one you can use. Either spin an M45 a little faster or a M62 not so much.

Ok sounds good thanks for the info I will definitely look into it.


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