yah twin turbo's are used where u have multiple throttle bodies and u have a turbo going to 1 particular manifold building up pressure on the those particular cylinders, and not really tricky to tune just have to make sure u have the exact same setup on both turbo's just a double whammy of dense air,

and an intercooler sprayer sprays either CO2 which is liquid nitrogen or N2O (which i personally wouldnt suggest because id be afraid of it getting somewhere it shouldn't and blowing up)which drastically cools the outside of the intercooler decreasing the ambient air tempurature going into ur compression chamber, N2O nitrous oxide which is shot into the intercooler, or shot right b4 the intercooler does the same thing but internally and allows for a very good dispersement of n2o molecules which makes a very good mixture gas with a much higher Oxygen content to increase fuel consumption , of course this (as far as i know) can only be ran with a dry nitrous kit, since gas (absolutely) should not be introduced into an intercooler, so the system does require a fair amount of tuning to avoid detonation under the high compression setup, which would (REALLY) want to go to a lean condition if not properly kept in check

this is a CO2 sprayer
http://www.designengineering.com/cry...r_sprayer.html
or a N2O sprayer
http://www.overboost.com/obs/product...t_name=Nitrous Oxide&sc_id=1&sc_name=

and this is a typical n2o system that u have installed on ur intercooler
http://www.overboost.com/obs/product...t_name=Nitrous Oxide&sc_id=1&sc_name=

 

I was talking with a friend and we came to the conclusion that the C02 would be cheaper to get continually refilled.

-PHiZ

 

plus co2 doesnt ignite so id definitely suggest it over n2o for cooling purposes

 

on the sequential turbo setup the most commonlly tuned car that had them is the 93-95 usdm rx-7. the rx-7 acctaully has to same sized turbos but at but a butterfly valve closes off the piping to one of them until the car hit somin like 4000rpm the both are opened up this allows for a quik spool to get boost in the lower rpms but also more boost up high

 

twin turbos are really very common. porsches, supras, rx-7's, 300zx's, all have those stock. i was checking out the turbo setup on the autothority 996 and each turbo looks about the size of my tiny 15g that came with the greddy kit. wierd. there's one turbo on each side of the motor cause the pistons stroke horizontally, so each is run by only 3 cylinders. btw, that car made over 700whp and could go over 200mph.

 

As a side note, CO2 is more commonly just called carbon dioxide and N2O is not explosive or flammable. But CO2 would definitely be the cheaper way to go as a coolant.

 

yah i know this and ur right n2o isnt a flammable gas, but if its presented with a fire or spark it can cause the combustion rates to be increased very rapidly causing an explosive condition. much the same as pure oxygen (causes very explosive conditions), but hey thats why we want more in our engines.

 

i never thought of cooling that stuff down with co2 but i work at an airsmith shop for paintball guns and co2 is a great idea as long as u keep the co2 compresed and moving at saty extremmly cold and frost metal over. u could use a safty valve like the ones they use on compressed tanks thaaat releases the gas if the pressure gets high enough

 

And again, none of those are inline 4 cylinder engines, and all of those particular cars, with exception to the Porches and 300ZX, can be made very fast with a ceramic bearing single turbo. In the case of the Porches, a boxer engine is a pretty big pain to plumb up a single turbo on effectively. With the 300ZX, you also have a plumbing hassle, but mainly due to the tight confines of the engine bay with a relatively large V-6 engine.

 

4A-GZE, good little supercharged four.

Several people in the states have also twin-charged them. It got one AW-11 a high 11' second time. You can track down the slip/time/owner/AND setup diagram somewhere on http://www.board.mr2faq.com/