Twin Turbo or Supercharge

[Swift_3800_F-Body]

Which is better for Drag Racing?

Twin Turbo or Supercharge

[Swift_3800_F-Body]

I am trying for lower 0 to 60 mph times.

[Dans96RS]

hey welcome to the board,
I dont know much about this. but what i do know is that it is a pain in the a$$ to get a twin turbo on our cars there is no kit around you need to get one custom made. There are superchargers for our cars they cost around 3500. Generally a twin turbo will add more horsepower than the supercharger so you should run lower times with the turbo.

Where in Wisconsin are you from? I live in Madison

[helios]

I'm assuming a supercharger would give you better 0-60 times since you wouldn't have turbo lag but you would have MUCH better top end with a turbo set up.

You're probably better off using a large single turbo rather than twin turboing the car if it is even possible.

[Takumi Fujiwara]

The Idea of dual is to eliminate lag. but lol, like Twin turbo would be quite a feat over a super. Id say super would be ur cost affective choice to say the least.

[Swift_3800_F-Body]

Well, I did some research and found alot..
I know they make Twin Turbo Kits for the LT1/LS1 for over 6 grand $$$ (which is rediculous)
I could probably build a TT setup with my dad for 1/4 of that price. And from what i hear they are not too hard to put on our cars. It just takes time to build such a project which can be exhausting.

Infact it would be harder to put a single turbo on our car. Take notice we have 2 headers (v6) that would mean you would have to weld a complex setup for both headers to exhaust into the turbo. I dont think any "Recent Popular" stock cars 6 cylinder and Up have a single turbo package

All Turbo Cars with V6 and V8
(Mitsubishi 3000GT/StealthRT)
(Lotus Esprit V8)
(Nissan 300ZX V6)
(Toyota Supra)

They all have twin turbo.

One Big Turbo would be better for the track. But twins are better for the street. Twin Turbo would also reduce turbo lag. One Big Turbo could put your car into 11's easily with proper engine mods to withstand high psi. People do it with the 3.8 Buick Regals all the time. But for me, i think im going Twin I dont want to

[Formulao96]

<blockquote>quote:</font><hr>Originally posted by Swift_3800_F-Body:

All Turbo Cars with V6 and V8
(Mitsubishi 3000GT/StealthRT)
(Lotus Esprit V8)
(Nissan 300ZX V6)
(Toyota Supra)

They all have twin turbo.
<hr></blockquote>

Even though they have twins from the factory, you have to agree with me that Supras eliminate the twins to go with a single huge turbo to produce the most horse. A 3000GT would do the same thing, but it has no room, 300zx is the trash of import super cars, so no one cares about them, and a Lotus is a V8 out of the box so there is no need to convert it. Sinlge turbo owns all, hands down. The most efficient turbo system would be a single turbo that is the perfect size for that specific engine. Twins also cant hold boost as long as singles, they spike to the peak, then fall rapidly to a certain PSI. Try twin out, see if you can pull it off.

[ May 06, 2003: Message edited by: Formulao96 ]</p>

[Mikael]

Buick GN, older 300Z turbos, turbo trans am, all are single turbo V6 cars.


Twin vs Single turbo has ZERO effect on spooling. It is the size of the turbo/turbos that you are using. Two T88s will spool slower (never) compared to 1 T2.

If you know what you are doing, lag can easily be overcome.

[Josh R.]

Generally people think that twin turbo setups spool faster than single turbo setups, and that is just not true. It's all about what a/r you are running, and not about the number of turbos. Look at this link here that compares a twin turbo supra (2 T-28s) and a single turbo supra (1 T-88): http://www.turbomagazine.com/tech/0103tur_singlevstwin/

Yeah, the twin setup created slightly more boost(about .5 psi more) below 4000 rpms. But it's a T-88 on the single turbo supra, which is freaking HUGE!!! :eek:

Either way it's done, twin or single, too small an a/r will kill topend, and too big an a/r will create a lot of lag ;)

[ May 06, 2003: Message edited by: Josh R. ]</p>

[Josh R.]

Also, since you stated that you are going for better 0-60 times it's a good thing you have an automatic. Automatic cars and turbos go hand in hand! An automatic turbo car is able to create engine load on the line and in the process create boost. A manual car cannot achieve engine load on the line, thus it cannot create boost. That's why GN/T-Types are so fast off the line. [img]smile.gif[/img]


I suggest you buy "Maximum Boost: Designing, Testing, and Installing Turbocharger Systems" by Corky Bell as it a very good book and has tons of very useful information on designing turbo systems the right way. [img]smile.gif[/img]

[ May 06, 2003: Message edited by: Josh R. ]</p>

[Arctc Wolf]

an auto w/ a higher stall TC will eliminate lag at the line w/ a turbo setup. a sc kit will be cheaper and easier to build, but the twin turbo kit will make the most power

[Josh R.]

A low stall converter can make boost on the line just fine. Both of my TGPs can make 8 psi on the factory chip, with the factory 1800 rpm converter. That's not to say that ASC/McLaren didn't put in a flag that when the computer sees 0 mph and a lot of boost that it pulls out timing to reduce brake torque on the tranny. :rolleyes:

It's not a matter of engine speed. It's matter of exhaust cfms. An engine under no load will not create a lot of exhaust cfms...while and engine under load will create a lot of exhaust cfms.

[ May 06, 2003: Message edited by: Josh R. ]</p>

[Swift_3800_F-Body]

ok thanks guys. and ill get that book josh.

Yes i believe one big turbo would be best for track times for high end. Im still more interested in twin. because they will spool faster on the low end which is what i want. But im am going to continue to read, im way off from spending any money yet.

[Josh R.]

You should take a ride in a TGP and see what is probably the fastest spooling single turbo car ever made. Just imagine a T-25 on a 3.1 liter V6, boost is instant once on the gas. I'm talking full boost right away. It's really a strange car to drive because besides the sound you would never know that it's turbo. The powerband is all midrange and it falls off at 5200 rpms, which is were it shifts. Put on a turbo that is way too small and that's what you get. :rolleyes:

[ May 06, 2003: Message edited by: Josh R. ]</p>

[Arctc Wolf]

if you plan on going w/ a setup like on the 300ZX w/ a turbo off each bank, it'll act more like a single turbo setup, because each bank is spooling each turbo separately b4 the exhaust merges downstream. match each turbo to each side of ur engine, so it'd be like matching each turbo to 1/2 of ur engine. this will work best. the latest example of this is the 350Z w/ a new greddy turbo kit on it, in this same configuration. the turbo's used were 16G's i think, and can make up to 420 hp per turbo, so there's plenty of tuning potential there, plus spool up is quick, making boost at 2000 rpm. not bad if you ask me.