a few questions here.



1. if you have a single T setup and putting out 400 hp as a resolt, then if you take a twin setup each putting out 200 hp so total 400hp, wouldn't the twin be better because the two turbos are smaller then the one big one so they will spool alot faster but produce same hp as the big one. Is my reasoning correct?



2. how much more does a turbo with a ceramic turbine costs vs one that makes same power but with a matal turbine.



3. how much faster does a ceramic turbine spool and is it worth the cost?

1. yes

thanks https://www.nopistons.com/forums/pub...IR#>/smile.png



# 2, and 3 staill stand. Anyone?



Also add #4: if the answer to #1 is yes then why does everyone want to go single on here???? why not just get wtwins with same power output. The cost of going single is huge. Why not just buy twins with output of a large single one?

Everyone has their own opinions and what they like. You can get great low end only go so far with twins and top end hp, as for a large single turbo you degrade you low end for some serious top end power !!!!

1- Not in an FD. The plumbing is too difficult. It makes twins un-efficient resulting in more heat and less power.



2- Not sure



3- Doesn't spool any faster. Better with heat.

ceramic turbine should spoor faster, its much lighter then a stell one.

also since heat is such a problem in turbos why hasnt anyone done something more effective then water and oil cooling for it. Why not put a little fridge compressor, put it in the back and line 2 1/2 cm D copper flexible tubes on the bottom to the front where they will spary in to a cooling jacket of the turbo (I dont know how it looks ina turbo but basicaly where water would go in a water cooled turbo). at -40C idle it can really bring turbo tems under controll. And it would weigh nothing. Sounds really good in theory.

the problem with the twins is that they are too restrictive, they have too much back pressure. and they also make a lot of heat that takes its toll on everything else. plus its complicated, and had an uneven power delivery



mike

I myself will probably stick with the twins a while before I switch and that's if I switch to single..

I myself couldn't wait to go single turbo. 400 rwhp and more heat/less reliability/higher boost or 400 rwhp and less heat/more reliability/less boost...do the math

btw a ceramic turbine will spool faster then a steal one. It is much lighter. Same reason why small turbos spool faster then big once. Is my reasoning correct?





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also I have been reading up on water injection, and uperently it does wonders for people:



http://www.homemadeturbo.com/forum/index.p...id=4257;start=0



also someone there did some tests for us and:





I must say this is quite impressive. Did I mention this cost $80!! The only "expensive" components were the pump and the nozle, both at under 80$. For this kind of result, this really a worthy upgrade.



There are poepe on http://www.homemadeturbo.com who run at over 1000+ hp and are VERY pleased with water injection.



There is also has been experementation with injecting water directly in to the turbo. Test show that as long as the water is atomized in to a fine mist before it enters the turbo, the blades take no wear and preformance soars.

some great links:



http://home.ccci.org/Key_Information/2ndWa...erInjection.htm



http://www.dawesdevices.com/howto.html



http://www.510again.com/articles/watering/...g/watering.html

1. Water injection increases the mass of air/fuel mixture entering the cylinders, because it cools the hot air from the turbo's compressor. As the water droplets hit the compressor wheel going 100,000 rpm or so, a mist of amazingly small droplets is formed. These have such an incredibly large surface area compared to their volume that they evaporate (change to vapor) almost instantly, absorbing a tremendous amount of heat from the air-fuel mixture just before it is compressed and lit. The cooler mixture is denser, so for a given boost pressure, there will be more fuel and oxygen in the cylinder when the intake valve closes.



2. Water injection allows a higher intake manifold pressure before the detonation limit. The torque your engine produces is closely related to manifold pressure. Double the pressure, and at any given RPM, power will be approximately double. This applies only when the pressure is measured as "absolute" rather than the common "gauge" pressure. There are a number of ways to define absolute pressure, the most appropriate for turbos being "Bar". On the Bar scale, 0 is a vacuum, 1 is standard sea-level air pressure, and so on. A naturally-aspirated (non-supercharged or turbocharged) 510 will almost get 1 Bar at the peek torque RPM, while a turbocharged 510 can often exceed 2 Bars with water injection. This corresponds to about 15 PSI boost. Joe Keller of Whittier, CA, has exceeded 3 bars on his very trick L16. This represents about the limit for a single-stage turbo, and required 6:1 compression, aviation gas, and water injection.



By Member David Lewis

(www.510again.com)

If you do a twin turbo setup, you would have only half the exhaust volume available to spin each turbo versus all for just one. From what I've seen, these setups are a ton more expensive and spool slower than a properly sized single.

hm I just realized this isnt the place for this, too big of a topic. Just ignore this here,I will make a new thread for it. There should be a sticky on it anyway.

Im not too familiar with water injection and this may be a dumb ass question, but do you have to have like a separate tank filled with water for this water injection system to operate in your car ???

like I said there is a seperate thread for it now read it, it explains it very well.

Water Injection has been around for a while. Vosko, among others use it

dude .. if u really tihnk a single setup is more expensive than an aftermarket twin...you need some help...

Water Injection can be great- In very few applications. It's similar to NOS. It works wonderful if you tune it correctly and run it at the dragstrip, however- IMO it's useless on the track and an extra PITA on the street.

but its gotta be good...he read about it

and used the copy/paste feature wayyy too much.