Turboing vs. Supercharging - Pros and Cons

[M14A-Mclaren]

Originally Posted by dansedgli

APS have done a twin turbo Boss.

My bad, I hadn't seen it.

[brenx]

I'd personally prefer a supercharger due to less heat. It's user friendly and a whole lot less painful heatwise. Turbo's are great but generate too much heat for my liking.

Although I'd turbo my EL if I thought the auto wouldn't fail. If the $ were available I'd have a supercharged V8.

[Steffo]

Originally Posted by M14A-Mclaren

They obvouisly don't always work, I saw on Top Gear they put an Evo 8 FQ400 and floored it, against some Fiat Stilo Estate and the Fiat bet it down their runway becuase the turbo lag was so bad.

My understanding is that turbo's can take more space as well, thats why no one has been able to turbo a Boss powered Falcon, is that about right?

The FQ400 doesn't have anti-lag. With Anti-Lag.. you can make 45 psi at idle if you're psychotic enough. If it had anti-lag, when the throttle was off, you'd hear "Bang bang bang" etc.. it'd soundlike it was backfiring, as the fuel was exploding upon entering the exhaust tubing.

[Casper]

Originally Posted by Steffo

The FQ400 doesn't have anti-lag. With Anti-Lag.. you can make 45 psi at idle if you're psychotic enough. If it had anti-lag, when the throttle was off, you'd hear "Bang bang bang" etc.. it'd soundlike it was backfiring, as the fuel was exploding upon entering the exhaust tubing.

Ah, I see, so its a EPA friendly solution to remove turbo lag for road cars then? :

"Please report for emmissions testing"

Damn... somehow I dont see it passing either sound or pollutants testing in a hurry.

[MITCHAY]

Cant you get turbos with ceramic parts which are lighter. Also you can have a small turbo and a bigger turbo. Smaller one starts off then bigger one takes over.

[Casper]

Originally Posted by MITCHAY

Cant you get turbos with ceramic parts which are lighter. Also you can have a small turbo and a bigger turbo. Smaller one starts off then bigger one takes over.

Yes, indy cars run ceramic turbos. They are insanely expensive and intolerant to any sort of abuse. Just the smallest thing will destroy the impeller.

As for sequential turbos, yes, they are there and work well but once again, the compromise is cost. At what point does it become so expensive that it is no longer feesable? Thats something that everyone has to answer on their own.

[The MaDDeSTMaN]

Well this has turned into an informative, interesting and at times amusing thread, hasn't it?

It seems to me that some people need to calm down a little and realise it can sometimes come down to driver preference, and at other times a simple question of using the correct tool for the job, as was so well demonstrated by Caspers post. Ultimately, there is no real right or wrong, just preferences, both methods of forced induction do their job, it's just that they do it in different ways, but both have the same effect (forced induction, I'm not talking specific boost levels, just the fact that both methods force the engine to 'swallow' more air and fuel), just a different "character" to them.

I can appreciate both superchargers and turbos, and for me, it would come down to the particular engine that is going to have forced induction, as well as the intended use for that engine.

[MITCHAY]

For a low boost setup on a focus you dont want to spend heaps. You just get a good setup for what you can afford. Basically you cant have it all if you spend shit all. If its just gonna be a cheapy setup then forget about lag cause it isnt gonna mean anything. You dont want to flog everything so you dont have to get into technicalities. If you go low boost you just want a bit extra not flat out beast. When you want to have a beast then you get into the technicalities such as lag, top end and low end etc. Ive barely seen any S/C cars on the street that would take down a turbo. Basically every car ive seen on the street is either turbo or TT. You get whatever setup for what you want it for.

[Resty]

Originally Posted by The MaDDeSTMaN

Well this has turned into an informative, interesting and at times amusing thread, hasn't it?

It seems to me that some people need to calm down a little and realise it can sometimes come down to driver preference, and at other times a simple question of using the correct tool for the job, as was so well demonstrated by Caspers post. Ultimately, there is no real right or wrong, just preferences, both methods of forced induction do their job, it's just that they do it in different ways, but both have the same effect (forced induction, I'm not talking specific boost levels, just the fact that both methods force the engine to 'swallow' more air and fuel), just a different "character" to them.

I can appreciate both superchargers and turbos, and for me, it would come down to the particular engine that is going to have forced induction, as well as the intended use for that engine.

I totally agree with this opinion, but relating to the topic at hand, to date there is no SC focus that puts down more power than a T focus. Period.

I've read heaps about 14 sec with SC and 13's with bb kits and thats it. The tq is not there with SC for the focus, the only thing close enough would be powerworks supercharger. 220whp and 200 ft/lbs of torqe. It's an M62 blower, intercooled. The company who put it together coinsides with Cosworth (so u know its done right).

The quickest streetable T focus's, there are 2 that I know of: 1. Tom Lesperance 518hp@w 1/4 time 11.88 auto on street tryes and another that was helped by HKS Japan putting down 449hp@w 1/4 time 11.35 on drags (not bad for shopping trolleys!! :P)

As for the SC from ford racing, if its the Jackson Racing one forget it, you'll get bored. If you can't get ur focus to climb beyond 250hp with FI then get bolt ons.

[Rod]

give me a TTurbo anyday........ but i guess i am just biased

one thing to concidder is the fact that it cost's POWER to drive a supercharger were a Turbo is driven from the exhaust pressure

anybody old enough to remember the "Bandag Bullet" that thing was something that would please us all

Twin Engine
2 Super Charger's
4 Turbo Chargers
& a little giggle "GAS" to get it all moveing

regards
rod

[RED_EL_XR8]

Originally Posted by Rod

......... one thing to concidder is the fact that it cost's POWER to drive a supercharger were a Turbo is driven from the exhaust pressure........

This one always gets me, The net result of a Turbo or a s/charger is positive, but this concept of free energy in turbocherging, put any form of flow restriction in an an exhaust and the engine will take a hit. If the turbo inlet piping was not providing forced induction driving the turbo vane would be putting a definate hit on engine horsepower.

I'm not argueing the relative merits of either system, but this conncept of "free energy" is best kept for the sales brochures, there is no such thing.

.

[mcflux]

Is blown, is good

Just avoid those "electric superchargers"!!!