I understand that a f1 or a ysi will make more power than a t66. Thats a given. But if you have similar sized compressors its a different story.

 

I think its cool that Realquick has come up with a powerful and affordable turbo system but lets not make turbos into something there not. Large turbos will always have lag and large superchargers do not. I have a hard time getting a responsive supercharger to hook I can only guess it must be alot more difficult to control turbo spoolup.

 

I wouldnt go that far. Turbo cars setup correctly will run the big numbers

With a 2 step, a turbo car can come off the line with as much boost as it wants... so there is no lag. In fact, the the turbos will be in full boost longer than a blower (hit full boost quicker which means more power under the curve). The blower needs rpm to make boost, while a turbo needs the engine to be loaded.

We can talk about about true street cars for a second. With a turbo setup, you can choose to run 15psi. Depending on the setup, here is what your boost curve can look like:

2000rpm - 2psi
3000rpm - 10psi
3500rpm - 15psi
4000rpm -15psi
5000rpm - 15psi
6000rpm - 15psi

You can see the full 15psi from 3500-6000rpm. What kind of turbo will do this? How about a T76 that will support 800-900rwhp.

Now, it will take a big blower to support that kind of power... like a YSI or F1 (which are big $$$). Also, if you want to run 15psi with the blower... you'll see the 15psi at 6000rpm (for example). Boost is linear with S/C's, so for example:

2000rpm - 3psi
3000rpm - 6psi
4000rpm - 9psi
5000rpm - 12psi
6000rpm - 15psi

Which car would have more area under the curve? Which car if both leave at 4000rpm will be making more tq at launch?

I am not bashing blowers, they are great performers, easy to package and not to bad to install. In most situations, turbos are where its at.

Here is a quick list on ls1tech of their fastest members (checkout which power adder is used to get there):
http://www.ls1tech.com/forums/showthread.php?t=600373

 

I agree with realquick. A correct turbo setup will have no lag. My buddy has a 76mm on a 331 stroker in his mustang. He already runs in the 9's out here. He runs it on the street from time to time. Even though he runs a full drag slick, he still has problems hooking on the street on a 10psi tune. I've been with him and i can tell you, there is NO lag what so ever. Car scares the crap out of me. I'd like to have a turbo myself and may do so one day, but the charger was so much simpler as far as the install and room goes, plus, with my T-trim setup, i find it pretty streetable just for the fact that your not full boost that quick. Kinda give it a chance to hook up with a good tire on the street where as a similar turbo setup may be blowing the tires off it at the same time. I can always up to a YSi if i want more boost too.

Ken R.

 

When you break something that just means you found your weak-point!
ahahaha my weak point is my wallet
to have lag with a big turbo requires a small motor, considering we are all rocking at least 346 cubic inches and higher stock the lag with any decent size turbo is very little. on a little 1.8l honda motor a t76 is gonna be a very interesting ride, nothing til 5000RPM then 6500-7000rpm full boost lol
i think it would be a lot more debatable if they made a EASY to install eaton/ twin-screw/ roots/ whatever for they fbody but considering a centrifugal is a belt driven turbo it closes the gap with a nose to the turbo for being more efficient.

 

thats why you buy a big turbo, such as an s400, and dont make boost until 3600 or so. Gives you a chance to hook up before you hit boost lol

 

not really dude, if you hit boost hard enough your tires WILL break loose from you,

and im not sure, im most definetly wrong,m but doesnt SUDDEN boost wreak havoc on your motor since its such a sudden hard hit instead of working into the boost

 

I don't disagree that turbos make more boost lower in the RPM band. Its the area between 2000-3000 rpm that shows how it goes from 2 to 10 psi. It would be almost impossible to control that spool up without getting wheelspin. Especially for us guys that row the gears. I'm sure with a turbo 400 and a transbrake people are putting it to the ground though.

BTW I'm curious as to the longevity of the newer turbo's. I remember a buddy of mine who went through 3 turbos on his stock 78 Trans AM. Bearings kept going bad.

 

if taken care of the turbo could outlast the vehicle. older turbos that werent water cooled would coke up and fail but even then if they are taken care of 100k miles isnt unheard of. my 3kgt vr4 had original turbos in great shape at 125k and just about everyone i know with newer turbo cars havent had any problems that werent lack of proper care or just straight up abuse. they have made leaps and bounds in turbo tech since the 80's and 90's

 

your driveline takes most of the beating but a linear jump like a centrifugal is much kinder to your car

 

We haven't had one of these debates for a while now...If nothing else it gets people thinking while pointing out a lot of pros & cons to both types of systems.

97WS6Pilot needs some support here. I'm not going to say that one system performs better than the other as there are LOTS of turbo cars making LOTS of power and there are LOTS of blower cars making LOTS of power. And until one system absolutely dominates over the other, it's unfair to say "turbos all the way". This is like debating Chevy vs. Ford, Blonds vs. Brunettes, Tastes great vs. Less filling. It is more a matter of preference than anything else. Show me a quick turbo car and I'll show you a just as quick blower car. People on this forum are always stating that a particular turbo should easily produce x amount of horsepower, so will a comparably matched blower, they just acheive similar results through different means. "Big numbers" from any combination don't mean a damn thing if you can't apply them to the ground. Dyno numbers are just that...numbers. Real life application of that power is what it's all about. There are guys making 1100 h.p. that get their asses handed to them on a regular basis by guys making only 800 h.p. Choose a system that appeals to you, build it and the rest of the car to support it and enjoy driving/racing it. Just don't be suprised if you get beat (by a car with the other system).

 

VERY TRUE WORDS!!!

Like he said, its purely preference now...Back in the day, it used to be only supercharging just cause thats all that was available...Options are endless now, just what you like...

I love the sound of a turbo spooling and the blow off valve releasing the boost! I was always (and always will be) a fan of the MK4 Supra's...To me, the sound of a single turbo supra, with a apexi N1 muffler and a hks bov is just sex! The sound of a cammed out muscle car is the same. combine the two and ahh man...

Thats why im boosting my Z, and getting the cam i have...I cant wait for my setup to get here

 

Thats why they make boost controllers, with a GOOD one you can control boost competely to make a car hook with a turbo setup. I plan on 140+ mph traps and the car will hook on a cold street, cold tires with the boost controller setup I plan to run, also and do it on the stock wheels and a small drag radial. Great thing is IF I did start spinning bad, I could keep the pedal pinned and with the press of a button on the steering wheel, drop boost to gain traction back. With the blower your off the gas trying to get it to hook back up, but you still have lots of power, you can't drop off the power level.

Plus the main advantage of the turbo is you can just flat out turn the boost down ON THE FLY or back up ON THE FLY. This means I can drive around everyday on 6lbs, beat the crap out of my car on less power which means I'll be putting LESS strain on everything. Then if some bike pulls up next to me, I can go from 6lbs to 9lb to 12lbs to 14lbs(if need be) on the fly, mid race. Good luck doing that with a blower.

 

And I love the sound of a blower whine...on ANYTHING!!! THAT'S what makes this country so great...freedom of choice!

 

Yeah, its preference.

Down side to the charger is liner boost that is controlled by the belt/pulley. Much more freedom of control of the boost with a Turbo like Justin mentioned.

Make no mistake, if you dont know how to launch a turbo car, a smaller blower car will drag you down the strip. Its only roll races then It takes some smarts to get a turbo set up right (not that it doesnt for a blower... but you get what I am saying).

Jon