Twins vs Single

ScreamingFast · Site Admin Joined: Aug 17, 2008 Posts: 11379

What is the major difference between a Twin Turbo Set up and a Single Turbo Set up? I notice that there isn't much of a difference in Twin Turbo set ups and Single Turbo set ups in Street cars in HP at the same boost. Most Super High Power Cars run larger Single Turbo set up's, right?
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swervo · Dangerous Joined: Aug 19, 2008 Posts: 669 Location: SoCal

On the street, nothing really different besides preference. You can get the single to spool just as fast as twins, depending on correct sizing of the turbos.

FastOrange · Posted: Tue Jan 13, 2009 8:47 pm Post subject:

Only one turbo to be concerned about maintaing/replacing. Maybe better underhood temps with just one screaming hot turbine and not two.
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TWINSCRW · Guest

also have bi-turbo's a small turbo to spool up the large turbo... I'd imagine that would increase power and lower air temps since the main turbo isnt spooled up by exhaust gases

ScreamingFast · Site Admin Joined: Aug 17, 2008 Posts: 11379

R there any Bi-turbo's on the market for street cars. I know they used it in turbo diesels (08 F-350).
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TWINSCRW · Guest

IDK I saw something on them but its been a while... I'm sure NSI could come up with one for you.... even if it is a one off custom setup. That would get you to the cover of a magazine....

BelligerentBlue · Posted: Wed Jan 14, 2009 8:52 pm Post subject:

Chris it's really not worth the money and hassle to go twin unless you have like a big block engine and your planning on insane power. Your engine or any of our engines for that matter is going to get plenty of efficient power with a properly picked single intercooled ball bearing turbo set up and Taylor tuning it.
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ScreamingFast · Site Admin Joined: Aug 17, 2008 Posts: 11379

I know I just wanted to figure out what the major diff's between the two. I guess if one is more efficient than the the other. And if it really worth the extra money to go with a twin set up. I personally am going Procharger route with the 00 gt and hopefully a Single Turbo with the 05.
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glittle75 · Parts Changer Joined: Sep 28, 2008 Posts: 474

twins for street cars is viable so you can have 2 small guys, and spool them quick, because face it, street guys are more 'off the line' and acceleration oriented, and have generally smaller engines.

one single large turbo is gonna need a bigger engine to spool it. the drag only guys do this because its alot of top end power. and drag cars live in the post 6k rpm world. so they can maintain more boost then your normal car.

getting the right thing for you is better than getting the biggest thing you can. if you have a street car, that doesnt go over 6k, then 2 little ones is right for you, you get the same airflow as one big one, but your motor can spool them easily. if you have a 1/4 or 1/8 mile car with a maxed bore/stroke motor, then a 99mm turbo will work, because you can spool more and use it well.

ScreamingFast · Site Admin Joined: Aug 17, 2008 Posts: 11379

Thanks Greg, with the 05 single turbo from NSI, they plan on using a small moderate single turbo on 6 psi boost w/ a goal of 450 rwph and w/ supporting mods 650-700 wrhp. If there is alot of lag, I will go with a deeper gear 3.73 or a small nitrous shot to spool up quicker. But seriously, this going to be a street car, just with a nice turbo set up.
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BelligerentBlue · Posted: Thu Jan 15, 2009 10:54 pm Post subject:

You could always run two size turbos. One to spool up quickly and one to spool up later on in the RPM's. That's a new thing they are moving into. I personally wouldn't want anything more than 450 for a street car. Hell I would be happy with my car in the 3s. If this Chevelle sells first I'm finishing the Mustang and vice versa.
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over-torque · Joined: May 25, 2009 Posts: 5 Location: Hampstead nc

bi-turbos are (i could be wrong) mainly in the diesel world as they result in very high boost pressures. like 55 psi and upwards. my best friend is a diesel guy and was telling me of a drag truck that was running over 100 psi. must be nice not to have to worry about detonation!

over-torque · Joined: May 25, 2009 Posts: 5 Location: Hampstead nc

never mind, im thinking of a kind of sequential turbo charging.

Black_n_blue · Joined: Aug 19, 2008 Posts: 38 Location: Jacksonville, NC

yea chris ive been thinking about twins myself but i want 500+ hp but without blowing a motor ya kno...the only problem is i can never get to nsi because of either work or taking care of the little one...i saw some really nice setups on two sites fast orange sent me....thp.com and helion.com....i think im going dual 80mm turbo kit....or one...dont kno yet...any suggestions?

hardlivewire · Posted: Tue Jul 21, 2009 8:30 pm Post subject:

one turbo that way if something happens you will only have to look/replace at one point... thats my take


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