Performance Cams for 4.6L
New User
Joined: Sep 2003
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Comparing the turbo with the S'charger is somewhat the same, but the S'charger will usually pump air faster from the start. Turbo's are a lot better now than years passed, but they still take a few seconds to spool up to build pressure. Until you have pressure, you will not have the increase in power. The S'charger is direct drive to the engine and as the engine gains rpm's the pressure builds instantly. For towing both of them work well. For drag racing I'd rather have the S'charger or the much cheaper nitrous -- but we have already gone there, haven't we?!?!?!
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I think that you will find that production cars are turbo because of the cost factor -- it's cheaper to produce than a S'charger setup and most people don't know the difference. But to say all the fast cars use turbo's --- I think you will find ALL the fast 5 second or better cars use a S'charger.
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Alright, I asked a few guys about your NOS idea they told me it would be a good idea, but a risky one.
Risky due to the fact that NOS eats away at your rings and you may get air in the lines which can cause a problem.
In my opinion, I'd rather force natural air into my motor than introduce a gas that is way below zero.
Back to the turbo vs. SC, which one lasts longer or is more dependable?
Risky due to the fact that NOS eats away at your rings and you may get air in the lines which can cause a problem.
In my opinion, I'd rather force natural air into my motor than introduce a gas that is way below zero.
Back to the turbo vs. SC, which one lasts longer or is more dependable?
Tuned
Joined: Sep 2003
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From: Arkansas
Probably not a whole lot of longevity difference between the two. Turbos don't usually last as long in general due to the fact they are put under more stress.....higher rpms and temperatures. You'll notice that almost every auto maker that has a s/c'd vehicle uses an Eaton Gen IV roots type supercharger......great reliability and easier tuning than a turbo setup. As far as bang for the buck a positive displacment supercharger kit is the way to go. They develope a linear torque curve that is ideal for trucks.
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I've used NOS for thirty years and have never seen any effects on the rings. The only place that air in the line would hurt you is if the fuel pump could not keep up --- and that probably isn't going to happen with your fuel injection pump as a supply. There are a lot of people that don't feel comfortable with NOS -- that's OK.
If you buy a book on it and learn how it works then you probably won't have any real trouble. It's only for stoplight racing -- it will not take the place of a turbo or S'charger for towing. Some of the new S'charger kits are really interesting and dependable. Have fun.
If you buy a book on it and learn how it works then you probably won't have any real trouble. It's only for stoplight racing -- it will not take the place of a turbo or S'charger for towing. Some of the new S'charger kits are really interesting and dependable. Have fun.
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So a centrifugal SC isn'y as effective as a roots blower? I've been looking a Procharger because they say they off the best intercooler on the market.
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Tuned
Joined: Sep 2003
Posts: 311
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From: Arkansas
Probably not....those front mount intercoolers are only good at boost levels the stock engine wouldn't live long under. Since ATI and Vortech have merged I'm wondering if you can get the air-to-water cooler that Vortech offers for the Mustangs, might look into that. Centrifugal s/c's are rpm responsive and build boost as the rpms increase. Which is good if you race and want the higher peak numbers the centrifugal can offer. Roots type, or any positive displacement, superchargers dump their air charge the instant you get on the gas....so instead of waiting till 3,000 rpms comes up to start making serious power gains you are making power from 1800 rpms on up.....look at a dynograph of a new Cobra and see how flat and broad the torque curve is...that's what you want for a truck.
Last edited by 2000BLK54; Oct 3, 2003 at 08:09 AM.
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