SouthSideSlider

Vortech Root style supercharger expected complcations? ni know that all the mounting brackest and the piping from and too the supercharger will have to be custom made and that a fuel managment of some sort will be needed but what else do you think i should do? as a note im not making this car for HP i wanta nice car with kick *** pickup. my motor will be rebiult but not right now mostlikely after the supercharger is setup. im keeping the motor a 6port should i run the turbo 2 rotors? how about porting what do you guys tihnk. also im making true cold air/ram air intake using a turbo 2 hood

cptpain

iTrader: (1)

search..... there are plenty of threads about S/C's and guys who have them on their rotaries.

Aaron Cake

iTrader: (1)

The basic summary of all those threads is this: It's a very expensive and complicated way to make 180 HP.

kontakt

You will run into a severe issue of existance.

Roots blower = Roots type blower
Vortech blower = Centrifugal type charger

It can't be both.

iceblue

I prefer the vortech system. I would always stay turbo on these cars unless you have a very fresh and well setup NA motor already and you just want to add a SC on it for some pop. If you are into serious power and over 350 turbo only.

Evil Aviator

A centrifugal supercharger isn't a blower, but otherwise I agree that the original poster may want to do some research before attempting to install an impossible form of forced induction.

If it makes the original poster feel better, I should point out that a turbo (such as the stock RX-7 TII turbo) is in fact a type of supercharger, which very closely resembles a Vortech supercharger.

1. A true ram air intake requires a divergent duct. The TII scoop is the wrong shape, difficult to seal properly under pressure, and in a really bad location for ram air. It may also be too small, but I haven't run the numbers to verify that.
2. A true cold air intake chills the air below ambient temperature. A true ram air scoop increases the air temperature as it pressurizes the air. So unless you install some type of chilling device (dry ice, nitrous oxide, CO2, etc.) it will not be a true cold air intake, especially if it is a true ram air intake.

1. I don't think you have the expertise for this incredibly complicated project.
2. I have been on this forum for over 7 years. The number of people who I know of accomplishing this conversion on their own 2Gen RX-7 = 0. I know of one very wealthy retired engineer who accomplished this conversion on his Miata, and a few individuals who were able to convert their 2Gen RX-7 with a good kit and/or help from a professional race shop.
3. Even if you could pull it off, it would cost about $4,000-5,000 to have the same acceleration as a $2,000-3,000 TII engine swap. Additionally, the TII engine swap would take 1/2 to 1/4 the effort.
4. OK, now is where you reply with a really nasty post saying how I am a "hater", how you really do know what you are doing, how people like me discourage "original" ideas, and how this forum is so negative. Or, you can learn from these posts and use them to put your time and money toward more worthwhile performance modifications. It's your choice, and it's your car.

iceblue

Evil Aviator - despite anything said I have not seen you in some time thanks for showing up. You are always a welth of knowledge and enjoy your posts, poke your head in around here more ;-)

SouthSideSlider

yes i relise a T2 swap would be easyer cheap more powerful. and i may sound like a moron but i dont want that. sorry i didn't know what i was talking with cold air intake i got that from reading magizines trying to figure this stuff out.

its a roots just came off a Chevy vortech engine.

now i really want to stay away from turbo. i know rotorys arn't happy N/A motors(at least mine isn't happy)so the only other thing was supercharging. i was figureing the supercharger would be better for autocross which i like to do.
my only turbo experiance is from a European direct 1989 Volvo 740 turbo wagon with the italian B204GT motor running the Garrett T3-series turbo instead of the Mitsubishi TD04 series turbo.

kontakt

I don't know of any "Chevy Vortech" engine that came with a roots blower. They come with a Vortech Supercharger.

If you've got a snail with a geared side where the exhaust side would be on a turbo, you have a Centrifugal Supercharger.

If you are looking for the "low end power" that a supercharger will give, then you want a roots or twin screw blower. The roots blower is horribly inefficient, and the only kit is very very expensive for power gains. I've also seen people set it up and get no power gains whatsoever.

A twin screw, or whipple blower would make for a great setup, but are extremely expensive. There is also no kit for these. The closest you could do is look to see if 88IntegraLS has sold his setup yet. Last I checked (a good while ago) it was for sale at like $950, but that woudl be far from your out of pocket cost.

ZeroDrift

iTrader: (1)

I have a stock turbo setup on my car with a large fmic. I dyno'd at 201 hp while running 5 lbs of boost. I autocross my car constantly, and I do very well for myself. I'd consider searching for past attempts with custom supercharger setups, or look into buying an old camden supercharger kit. Also keep in mind that you will need some sort of engine management as well. Things like this really cost alot more than most people think.

-All the more power to you if you make it work!

Evil Aviator

Almost all magazines are designed to advertise products for vendors, and almost all writers are NOT engineers. Just as long as you understand that, you can sift through the garbage and find some good info every now and then.

Also, you can use the TII scoop for the engine intake, but it will have no ram air compression, and it will not magically chill the air below ambient temperatures.

Oh, you mean Vortec, not Vortech.

The Syclone Vortec 4300 was turbocharged. Which Vortec engine came with a Roots blower?

Mazda earned its most prominent worldwide racing wins with NA rotary engines.

I autocrossed against an RX-7 that had a centrifugal supercharger. It seemed to work well because the boost only came on at higher engine rpms, making the car a little easier to handle.