Good posts scg87 & onefast. You saved me a bunch of typing. Turbocharging FTW.

 

Obviously.... There is a difference in looking "alike" and looking the "same". Really your just being a smart ***. Here I'll make you happy, the COMPRESSOR housing's of each look "alike" or even better yet, they are the "same". From first glance, someone with little knowledge couldn't tell the difference, especially how some of the centri's sit in the engine bay, you can't see the pulley side very clear.

 

i agree im splitting hairs.

but someone with little knowledge wouldnt really be worrying bout the difference. more like "hey whats that?" lol

 

I'll have to agree there. lol

 

Thanks for the info guys.

OneFastEclipse- The term Belt-driven turbo is just the slang way of putting it. However, with my Vortech, at least the way the guys at Vortech explained this. Until I go into boost, the system actually "powers" my motor down, almost to completely stock form, for everyday driving, and improved gas mileage. IMO a turbo and a roots/Ts style blower are harder on a motor then a centri. But, I know Turbos are very efficient as well as ts/roots blowers. The only reason I say mine is, simply because until I hit 3K RPM, my car is practically stock.

Fazm- Damn man, you drive too much. I've got close to 15K in one year. Damn!!!!!! Also, if someone did not have a lot of knowledge about turbos, and centri's, they'd think they were the same and operated. Sure, the angle of that pic is just showing the end of the blower/turbo you will see when looking at your engine. Flip it around, and it is totally different.

Also, I think the fastest my Vortech ever spun was 76,000 RPM, which was on the dyno, according to the data from the machine. I though that was fast, but damn, 150-200,000 RPM WTF!!!!!!!!! I think I am either doing a 4V swap with TT's, or building my 3V with a ST.

OneFastEclipse- What you mentioned about the TS VS. Centri is not exactly true. I race a buds Mach 1 twice from a roll, from about 45ish-60. He has an Eaton, 4.36 gears, and puts down 430, 400+ torque. This was before I got a lilttle boost in power with my mid-pipe. We hit it at the exact same time, he instantly put a half car, and after we hit 90, I stopped his pull, and I started to edge up to him to about 105 when he shut down. So, in most cases yes, TS/Roots could beat Centri's without extreme effort, but, us having similar power cars, and my setup with the tune I have, top end is where my car moves out pretty well... Just my. 02

 

Turbo and Roots/TS style chargers don't make any boost until called upon either. That's what a bypass valve is for. They function like a stock car in normal driving as well. You know that it takes almost 20% of your engines power to spin a supercharger? Whether your car is at idle or WOT, your engine is spinning that blower, putting stress on your whole setup. On a turbo car at idle, the engine doesn't have to work to spin anything, it sees a little more back pressure in the exhaust but that's it. There is a reason larger trucks that see 1,000,000 miles on a stock engine use a turbo charger to make there power and torque. Trust me, it's not because it's unreliable. Turbo is the most reliable way to make big power numbers, period.

Agreed.

I highly doubt you spun the Vortech anywhere near 76,000 RPM. Your making 11lbs of boost? I'm assuming stock pulley, maybe a size smaller. The max on a Vortech is between 50-60k RPM. Spinning it much faster then that and your going to cause some damage to the internals of your blower. Not to mention, unless your running a cog setup, you will never get it to spin that fast do to belt slippage.

Have you ever seen the power curve of a Roots/TS style blower? It's one of the most flat power curves you will ever see. If a Centri car and a Roots/TS car are making the same exact max HP numbers (figuring in the same car, weight, gear, etc.) The Roots/TS car will win the race every time do to when they are making the power. They will reach full boost and almost full power at about 2-3k RPM and carry it over through the whole RPM band. A Centri car will start low and reach the same max HP number at the very top of the RPM band. So in comparison, if the two cars both make 400hp to the tire, which do you think is better, the one making 400hp from 3k-6k rpms or the one making 400hp at 6k rpms? Not to mention, if the two cars are producing the same amount of HP, the Roots/TS will produce much more torque every time as well.

If you are pulling on your friend up high it is probably because you are putting more peak power to the ground then he is. If he is putting 430hp to the tire and you are putting say 460hp to the tire, then in your peak power you would pull him in. This of course depends on a lot of other variables as well such as weight, gearing, etc.

 

That makes a lot of sense. I now know the commonalities and the differences.

On the dyno, on the first run, the Vortech was said by the data provided by the ECO and the CPU it was hooked up to, to spin at that speed. However, that was the initial run. Aftermath, it spins around 61,000 RPM and not really more. I boost 11.39 to be precise, but that is not at all much of a difference from 11.

My friend gets peak power at 2500 RPM. However, my power starts to peak at 4K RPM, that's why it took a bit to get moving to his level, and goes all the way to 7100 RPM where I hit my 439. He obviously has more torque then I. I think he puts down 430 WTQ. Similar weight, I had 20's on, he had smaller tires. Although, I had complete traction due to my awesome tires. You are an awesome guy OneFastEclipse. Thanks again so much for the knowledge. Everyone else, thanks again.

 

No problem bud. Glad I could help.

 

Stop making turbos sound so damn good.[8D]If I had the money I would just buy a turbo kit for about 5 grand and leave the rest of the car stock. Did anybody see the 200,000 mile 5.0 with the turbo setup in MM&FF? They cranked it up to 13 lbs of boost and the car was putting 480 hp and over 500 ft. lbs. to the wheels. I figure 8 psiwould give me somewhat manageable power while keeping it well within the limits of the stock block and bottom end.

 

I'm a supercharger guy myself. There are several downfalls to a turbo as well. Not everything is perfect.