do turbo chargers go good with 305 tpi systems or should i just put my money in something eles and which is cheaper a turbo charger or a super charger?

 

If you don't know if its cheaper to supercharge or turbocharge a V8, you might want to do a lot more research then come back and ask this question.

 

i was asking because i don't know plus i heard turbo chragers are better than super chargers because the super charger runs its force induction from the crank shaft and turbo runs from the exhaust presure or something of that nature (that is according to sports car international the jan. 2001 issue

 

Turbo chargers are more efficient, and you can get more boost out of them, but they are not smog legal, if that is a concern where you live. Check out the power adders forum on here and ask them.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Either one is good, I think that turbos are used more on smaller engines because they dont take power from the engine to make more. Theres plenty of big turbo charged motors around, if your really looking for performance though, you might be better off building up a 350 and then going from there becauses theres alot more performance parts for 350s and you can make lots of power too.

 

Moving to Power adder forum...

 

If you to either add a super or turbocharger to a V8, go with the supercharger. It is much easier for installation and cheaper too. Turbos are mostly for four and six bangers. Turbos do run off the exhaust. There are two turbines, each of which has it's own "chamber," connected by a shaft. The exhaust builds up in it's chamber, causing the other turbine to spin, which will then blow that compressed air directly into the throttle body. Because of this delayed power adder, called turbo lag, it is mainly for high RPM applications, which SB chevys are not. Superchargers run off a belt, which spins a turbine to force air into the throttle body. No lag, and works at all RPM levels. Well, whatever you choose, good luck. Just my two cents. Hope this helps.

 

Also, you may want to consider forged pistons and connecting rods if your engine is old, if you plan on having a lot of horsepower, or if you rev it really high. Maybe a crank too, but it depends on your charger PSI/your application.

 

Umm, no.

Turbochargers are NOT just for 4 or 6 cylinders! Have you noticed all the fast cars in NMCA and NMRA racing are turbocharged small blocks? Turbos have some lag, yes. But they also reach full boost at a LOWER rpm than superchargers, and hold that boost across the entire rpm range. Nice, flat power curve. Centrifugal superchargers are driven by a belt. This causes parasitic drag, which means you are wasting horsepower to run the blower. NOT efficient. Also, full blower boost is rpm-dependent, which means full boost is not reached until close to redline. So blowers have more "lag" than turbochargers. At any specific boost level, a turbo will produce more horsepower than a supercharger with equal airflow characteristics. While being a more difficult install, if you can turbocharge your engine, go for it! Here are some more:
Turbos are adjustable. No pulley change needed.
Turbos allow better fuel economy. Blowers are always "on".
Turbos run off the cars exhaust. Blowers need a belt.
Turbos cause less internal stress on a engine.
Turbos are quiet at idle. My Vortech drives me nuts when working under the hood.

------------------
1989 Formula, 383", DFI, Mini-Ram, S-Trim Vortech, blah, blah...
Best ET: 10.796 @ 125.8 mph

TURBO 406 PROJECT STARTED!!!

Other expensive hobby: assault weapons/shooting sports

Employed at:
Hahn Racecraft
Accel EMIC/DFI Tuning
Turbosystems & Custom EFI

Member of Midwest F-Body Association
www.mfba.org

 

I know they're not JUST for 4 and 6 bangers, but it isn't really practical for most of our applications. I agree with you that turbos are better, but for our purposes, superchargers are much more economical. Oh well, good luck.

 

thanks guys i think i am going to get a super charger though because i only have a part time job and am 16. camarox84, what were you saying about old engins cause i have an 85 and it has 103,000 miles on it

 

What I was saying is, you may want to consider rebuilding your engine, and adding forged pistons and connecting rods. You don't want to just add a supercharger without making sure your engine can handle the power. You can cause some serious damage doing this. Just something to consider when boosting your engine. If you are on a small budget, you may want to rebuild the engine and do other internal engine mods (cam, pistons, rods, maybe a crank) and then add the supercharger later. That's just my opinion though. Do some research before making your decision, so you know exactly what you're getting. Hope this helps.

 

I might as well throw my stick into the fire If you have to ask which is cheaper, then I think neither is the correct answer. It'll probably be $3k for a complete supercharger kit (after you get everything you need) and $4k+ for the turbos, since much of it is custom work.

Regarding the boost lag issue and just high rpm use... I completely disagree when it comes to SBC's. On a small disp. engine, you don't have much exhaust volume to spin the turbos, and generally have a much larger turbo compared to the engine, so you get some boost lag at low rpms. I've got my twin turbos, and see full boost at 2000 rpms, and begin boost at around 1500 rpms. This would be impossible with a supercharger, where you generally only see max boost at your max rpm. Turbos you get full boost for nearly your entire powerband, as GMI_Fast mentioned. This means lots more torque (and power), especially at lower rpms such as highway cruising.

Done right, I believe turbos are better in nearly all applications. For most folks, superchargers are much easier to install (bolt on kits) and have less tuning and trial & error involved. Bottom line is how much experience you have doing custom work, how much time you have, and how much $ you have to buy the necessary parts. Folks have done junkyard turbo systems for several hundred, but they spent a ton of time searching for the proper parts, and even more time fabricating it all together. Take a look at http://www.skulte.com/turbo.html to get a good feel for what is involved. Good luck.


------------------
Andris Skulte
Skulte Performance Designs
Z28tt-89 IROC T56 DFI Twin Turbo
http://www.skulte.com