turtle_fc

iTrader: (1)

What do you guys think of a Super Charged FC??

Anyone know any Stats or info on them??

phoenix7

I've never seen/heard of one being a good idea. If you want to be unique then you won't be because it's been done several times. If you want to be fast then you won't be cuz I've never seen one past 230hp. If you want to spend more money for less performance than a TII swap then this is the project for you.

This topic has been brought up several times last month and you should have searched. Nice S4 BTW.

turtle_fc

iTrader: (1)

Thanks about the Nice S4


I was just wondering because after porting the car im trying to figure out what else to do...

I was considering the turbo but but was wondering what people actually thought about the supercharger

phoenix7

like I said it doesn't seem to be very cost effective. HP to $ invested is crappy when compared to a full TII swap.

If you really wanna know you can look into the early TISC (timed induction super Charger) prototype motors, specs and text and see if you can figure out a way to cheaply replicate what they did ( air pump using auxilary ports to increase power which was later scrapped but led to the VDI[5th and 6th ports] system in the 6 port motors) but it doesn't seem like a good idea to me.

I have never been a supporter of USING the little torque the 7 has, to run a SC in order to make more power. Search the forum and you'll find the other threads on this.

Evil Aviator

Roots type (Eaton, Camden, etc.): Looks and sounds impressive, works best for about 8psi boost, works OK up to about 12psi boost, quick boost rise, low efficiency means less power for each psi of boost vs. a turbo, difficult to intercool, not usually a success story on an RX-7.
http://www.camdensuperchargers.com/

Centrifugal type (Paxton, Nelson, etc.): Basically a turbocharger that is belt driven, boost increases with engine rpm with max boost only occuring at or near engine redline, good efficiency, easy to intercool, tends to autocross well on an RX-7.
http://www.geocities.com/boatseason/rx7.html

Twin screw type (Lysholm, Whipple, Autorotor, etc.): Potentially the best belt-driven supercharger option due to good boost rise combined with good efficiency, there is very little data about installing one on an RX-7. Rather expensive, and it may be difficult sizing one to the 13B engine.
http://www.aeromanagement.com.au/blown3rotor/index.html

anewconvert

iTrader: (1)

Intercooling a Roots blower is going to be difficult, but I think that is why we never see any high hp SC FCs. High overlap engines like blowers. The 13b is a high overlap engine. However a hot intake charge doesnt go well with a rotary, and without an intercooler there is only so much you can do with a roots blower.


That being said I think the camden unit could make some pretty serious power with a larger crank (or smaller blower) pulley and methanol injection. I fyou have the scratcha nd the tinkering know how, plus a standalone, you could probably make a rather fast SC FC. But it wont be as cheap as a TII swap, nor will you have as much info or history to look to for trouble shooting.


And I hope that isnt your sig because you are going to get a talking to about it size sooner rather than later.


BC

Evil Aviator

That being said, I think the RX-7 would make a great space shuttle with a couple of solid rocket boosters, a custom pressurized capsule, wings, rocket engines, and a few million dollars worth of thermal tiles.

A Roots type blower is designed for low boost only, and like most machinery, it works perfectly well when it is used within its design parameters. There is no point in trying to put lipstick on a pig. If you want high boost, then use a supercharger that is designed for high boost.

Looks like it was sooner.

rotorhead_izzy

iTrader: (36)

i like the idea of a sc fc. i'm actually going that route in the next few weeks. i'm going the paxton route.

turtle_fc

iTrader: (1)

Yes im alsoo going to be going that route... I have plans for my car but its hard on the budget

texFCturboII

iTrader: (17)

Turbo. Mas fina.

Josh13B

http://www.aeromanagement.com.au/blown3rotor/index.html

That was the best rotor i've ever seen, i wondered what happened to it. It was always my favourite at the drags, loud and quick! Stupid local's and the council complaining about the noise, happens all the time!

I reckon a supercharger would be pretty easy to fit on an rx7, dont know what sorta power it would make though, too much money if you ask me

RETed

Waste of money...
Ergo...
Waste of time.


-Ted

AUGieDogie

iTrader: (4)

I was thinking about going SC for my vert. But there really isn't much out there that will work well. The "newest" EFI supercharger won't hold idle lower then 1200rpm. Not great for a street car. Just do a turbo swap, you get so much more HP for $$

I know, i know turbo lag. But it really isn't going to be easy to do an SC

phoenix7

with the newer turbos in the market you won't have to worry about turbo lag. hell, even the stock units don't lag as much as you would think.