Can a Twin Turbo setup make as much hp capability as a Single Turbo setup?Arent

more turbos better I mean you would think so? https://www.nopistons.com/forums/pub...1047683561.gif

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the stock twins produce boatloads of heat at higher PSI. their efficiency (sp?) range is in the lower psi's (id say 12 or under) They do not flow well. Single turbos on the other hand can flow more air, use higher PSI levels without producing more heat and are a hell of a lot simpler then stock twins.



this is a very very basic look at the question. you have opened up a big topic and i suggest you search about these things before making a new thread.

you can get a better power band with the twins with the sequential setup, but there is no comparison on the power they can produce

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It does if they are the same size as most peoples singles. I don't think he was talking about the stock twins.

The drawback to twins is the plumbing. One of the plus's is that you can usually get two smaller turbo's cheaper than one big turbo(flows as much air as twins). If you can't do it yourself though, the twins are alot more expensive than a single. Some of you would die if you knew how little I spent on changing my car to twins.

How much did you spend changing them and what did you replace em with?

I think he said changing his car to twins, not from--indicating that he knows how to do the plumbing, and could therefore do it nice 'n cheap.

haha, you're the exception to the rule man......... your turbos are bigger than your engine

N/M, I'm an idjit, he changed to twins but not stock twins.

What is the biggest set of twins you can get?

That's much like asking "what's the biggest single turbo that I can put on my engine?". I guess it depends on how much room you can make for them. After that it's up to your wallet, turbo know-how, porting know-how, and imagination. But I'm sure a couple of really freakin' huge turbos could be shoehorned into the car for a photo shoot. https://www.nopistons.com/forums/pub...DIR#>/wink.png Having them actually spool up, well that's another issue.

What's the smallest single turbo I can get? For, say, a 25-50cc engine?

General rule of thumb - if the turbo is the same size or larger than the engine it will be attached to, there will be severe lag. https://www.nopistons.com/forums/pub...DIR#>/wink.png

I was thinking of a big turbo then a littler turbo so spool is quicker.Any suggestions as to what 2 sizes to go with.

I think that would be hard to do right if you went with different size twins. I'd imagine two different size turbos (one of each exhaust port) would create uneven backpressure so you'd end up with one exhaust port having more back pressure than the other. Which would prob be a pita for tuning if you wanted to really tune it right. Might be wrong though, thats just the first problem that came to mind.



If you want something like that stick with the seq set up but maybe do Robs simplification to the set up to get rid of the rats nest. You could make up to around 380rwhp range like that without to much problem.....thats good for some mid 11's in the 1/4



STEPHEN

You can simplify the twin turbo setup without going non-sequential? Link to the info on that?

hes talking about going non-seq.

I was looking for more then 380whp.Would I have to go single to meet the 400 an up range?

ok please specify. Are you talking about a TT setup like the stock TT on a 3rd gen...or are you talking about a TT setup like igy, where they are both bigger turbos. You wouldnt want to run a smaller and larger turbo for a setup like igy's for reasons that would already be mentioned. If you are talking about a TT setup like stock...well i think you might be out of luck there. Nobody really makes a larger stock type setup. your best bet there would be a set of BNR's or M2's, which are a upgraded stock turbos. running in parallel you should be able to hit 380rwhp pretty easily (correct me if im wrong) it just depends on your porting and tuning setup...

I'll try to make this quick....



Singles are easy to do. Simplification + Big HP = happy rotary owners.



Twins are not as easy. You COULD do a large twin setup. They are out there. HOWEVER... getting the 1.3L of a rotary to make use of a large twin setup is a little more difficult. I know of a twin TO4S setup in the making. I'm curious to see when full boost is achieved, and when the max power is made..



I'm running a larger bore twin setup. I hope to make 400 HP +... I'm sure I can, but will be nowhere the reliability level of a nice single.



A nice single will flow the same amount at less psi with LOTS less heat and stress to the manifold pluming...



Jeez that was a lot of typing... https://www.nopistons.com/forums/pub...IR#>/bigok.gif

Where they are both bigger on an FD.

Thanks! https://www.nopistons.com/forums/pub...DIR#>/cool.png