BklynRX7

Oh ok, i thought an intercooler would be possible if the tb wasnt on the intake. I am not really following a trend. i had an interest in a supercharger since I saw the supercharged mustang at the new york autoshow, i was just always under the impression that it wasnt possible for EFI fc's cause the only commercial kits i found were for carbed set-ups. Now seeing that it is relatively cheap and easy(compared to turbos). I also would much prefer a roots sc over turbo because, i have driven several turbos and the lag doesnt please me.

I admit I dont know what im doing and thats why i spend most of my free time on here and google trying to learn. I am not going to attempt to do something this big without being well educated first, and who better to learn from than a person with hands on experience. I'll get a general idea from here, develope a plan, lay the plan out to my mechanic and welder then get the parts and fine tune it down till it works. You still never answered me as to what gains you saw.

ddub

Relatively cheap and easy compared to turbos? That's an opinion. If the supercharger project is done properly it can get more costly than zbrown's did. Turbo isn't exactly tons more expensive, if any more.

Jager

iTrader: (10)

If people want cheap horse power, what about NOS?

totallimmortal

Yeah the money arguement aint gonna work, stock turboii parts arent that expensive and as discussed on this forum before it doesn't cost that much to turbo and NA, i see what you want to do with the intercooler and i suppose it could be done but i reaelly don't think your choosing the right blower, a centrifical blower would be much more efficient (and look sweet) such as a vortec of procharger, these can also and usualy are used with an intercooler, you would also have to address the weaknesses of the stock na drivetrain (especially and at least the clutch). Sorry to burst your bubble man i once too dreamed of the cheap and easy road to a boosted 7 but it seems the only easy road is to just buy a tii and there isn't really a cheap option with rx7s is there? lol but anyway if you want the most power for the money i would duplicat the turbo setup of one of the turbo nas on the forum instead

BklynRX7

Its not so much about being cheap as it is about the different benefits of a sc and tc. Im not saying i condone street racing but any type of competition I usually play with is over short distances (e.g. light to light, exit to exit highway...). The sc is going to add low end power, starting immediately when i step on the throttle, meanwhile by the time my turbo spools im already slowing down(maybe a little exadurated). Also installing a turbo on my n/a would require changing my exaust, cutting and modifying parts of my car to accomodate the different sized manifolds and the turbo itself. Meanwhile the Tb is the only part being changed by my SC. I also admit its a little about being different, but everyone here should understand thta seeing that we love an engine that has only been put into 10 cars in the history of the automobile.

ddub

This is why you LAUNCH at an rpm where you are spooling, duh. And a turbo on a high comp n/a will be spooling much sooner than it does on a TII. Saying that you wont be spooling quick enough is ludicris because turbo'd n/a guys see full boost much sooner than a TII and it's all you'll need. And FYI, not all turbos see instant 8lbs of boost (or whatever you'll be running) as soon as you hit the throttle.

Hmmm, lets see with the turbo you have to change your exhaust, modify some stock TII manifolds (if you go that route) and install them. Or you can just make 1 spacer and keep your current manifolds. With a supercharger lets see, you'll need a custom manifold MADE, custom mounting brackets, custom intake, mount the TB custom, custom throttle cable, you even said yourself you want to change the exhaust for this too, and possibly some custom intercooling. Sounds like a lot more custom work for the supercharger huh?

BklynRX7

I really need to sit down and talk to an intelligent mechanic about which route to go. This online forum business has me changing my mind every 3 days. I do not pretend to be an expert, i am here asking qustions because I dont know things. This whole business of planning something myself is not going to work becasue I do not know enough and im not going to learn it from reading online. Im just gonna save money now and when i have about $1000 saved up im gonna go discuss the whole forced induction issue with my mechanic and make a decision then. In a weird way, thanks for the absolute confusion.

ddub

If you're going to have someone else do it expect to pay a lot more than doing it yourself.

Jager

iTrader: (10)

Well you can sit down and do what I did. I looked at the Turbo NA, the SC NA, the swaps. And pick out whichever one that fits you, your budget, and your goals. There are alot of things to do, just pick out whichever one fits what you really want in the long run. If you want to SC your NA go for it. Just know all that has to be done.

drft_180sx

I don't want to sound mean, but sincerely you don't seem to know what you're doing...and that's fine, cause we are ll here to learn.

But, I'll tell you from experience that I was offered a free supercharger off of the newer model grand prix and I declined cause I don't have the welding capabilities and cash flow for such a venture. Not to mention the only proper way to do this is after the throttle body and preferrably intercooled. Lot's of welding and custom fab.

Good Luck.

If anything I would wait to see when Kahren's Custom Intake Manifold is done! That shows some real promise.

rotarygod

iTrader: (1)

You just need to realize that there is more than one way to do it "properly". A T-II may be cheap if you can find one. I haven't seen one for sale in years down here so it isn't always easy to just go buy one. This forum is full of many closed minded "know-it-alls" and there are many who actually have a clue. Differentiating between them is the hard part when you are trying to learn.

A supercharger can be made to work very well. Obviously so can a turbo. It really cracks me up when so called experts start spouting off efficiency numbers of turbos and then use the stock pathetically inefficient T-II setup as a reference. It would be very easy to set up a roots blower nonintercooled with the same boost as a stock T-II setup and get the same power. Yes in a perfect world a turbo is more efficient. Too bad the T-II is far from perfect. Not all turbos or superchargers are created equal either.

The important thing is that you design a system that is best for your needs. Screw what other people think about it or what it's worth to them. Everyone has different tastes. Half the people that talk against a particular system have never even seen one in person and are only spouting off hearsay anyways. You can make either system work very well and both of them can be done fairly inexpensively or on the pricey side. Obviously how much power you want will be the determining factor. Having been in both turbo and supercharged rotaries, I can say they are both very fun and both have their advantages and disadvatages. I like each for different reasons. I'm also still an n/a fan too. If you talk to 10 people, you'll get 10 different answers for 10 different reasons. One mechanic may say he likes superchargers but another may say otherwise. Do your homework on each system at an unbiased location such as fact based websites or books, then make your decision. You could easily be happy with any system.

BklynRX7

^^^^Exactly my point^^^^

A few weeks ago I posted about turboing my n/a and was told its hard as hell,will cost me a shitload of money and a total TII swap would be more logical. However I just spent $3500 getting my n/a motor built so i getting rid of it is not an option. I know having someone else do it will cost more, I dont really want to go that way because I would like to do it myself but as of the end of January this is gonna be my daily driver so I cant really afford to have my car down for a month or so while I figure out how to fabricate everything. I have always like the supercharger because its readily active and adds torque which our cars lack, but the turbo is easier to do right becasue so many people have done it and every good rotary mechanic has experience. It is even easier if the mechanic has done n/a turbo conversion before since he knows what to expect fabrication wise and can get it done quickly, the right way. I am still undecided as to what im gonna do, but I hope talking to someone with experience will help me make p my mind as to whats right for me.

Bukwild

first thing you need to realize is your car super charged or not will never be a torque light to light racer. And I think that you are getting a cloudy vision of this. 160lbs of torque is not what I call tremdious not to mention the 2nd gen was never advertised that it was a drag racer. These car were made to high rpm driving and handle great thru turns leaving most v8's a mile behind. The big blocks were designed to rule the street light to light racing and do. Your NA is not a MUSCLE CAR

BklynRX7

^^^^That is completely true, but thats doesnt mean that adding more torque wont be helpful.

rotarygod

iTrader: (1)

Torque is just a number. If you have a 150 ft lb of torque n/a vs a 150 ft lb torque turbo/supercharged car, the turbo/supercharged car will walk all over it. It's not only about how much you have but where you've got it. In the same token, a light to light racer is going to really be about power to weight ratio. Yes other things do apply as well but none so important as this. There's no reason why a small light car can't beat up a higher powered but heavier car. The most important thing to realize is that more torque (or horsepower for those who like to argue) equals more fun. You don't have to outrun a Z-06 to have fun.

Evil Aviator

rotarygod

iTrader: (1)

Here's one now. Thanks for the confirmation. I knew someone would surface.

Evil Aviator

Anybody with a college degree in such matters knows exactly what I am talking about. However, it is always interesting to see a real estate agent's perspective, so thank you for contributing your opinion.

SonicRaT

iTrader: (6)

Evil Aviators right, the most 'efficient' roots blower at the same boost is going to create more heat than the turbo, and especially with no intercooler to help, it's going to be a LOT worse than the stock turbo.