stevecivic

Has anyone thought about doing some sort of compound twin turbo setup like they do on the diesel trucks. It looks like a really good idea to make a big turbo spool fast on a small motor. I was thinking of something like a IHI and a Hx35 on a z6. what do you guys think?


steve

ososlohatch

stevecivic

why the ? Is there some thing that i am not seeing? peopl have done standard twins off of the same mani and made good power. why not use a big turbo that the motor would have a hard time spooling and a little turbo that would normoly run out of power combined to make big power together.

I was at a dyno day for diesels yesterday and some of the trucks with twins had huge primary turbos that they would never be able to spool normoly but ran with a smaller like stock turbo, they were able to spool both like stock. There were a couple truck making 900+wrhp and 1800+ lbft on just diesel with out nitrous.

steve

goldhatch94

DO IT! and post the pictures!

E-b0la

bad idea all around on a car.

stevecivic

can you tell me why it is a bad idea?

Smith-02

you're dumb. exhaust from turbo 1 will not spool turbo 2 any faster. you have to use either the compressor out from turbo 1, or exhaust from turbo 1 along with compressor out from 1.

you can't ------- magically JDM some extra airflow from somewhere to spool 2 turbos

stevecivic

I have a Dodge turbo diesel and know how the stock turbo spools. A friend of mine has a super B turbo on his CTD and it takes longer to spool. Now another friend has Twins on his CTD and it spools like stock and it has a huge primary turbo. Don't give me ---- if you don't know what you are talking about. I just want to know if anyone on here has heard of someone using this on gas engine. why would this not work?



see pic

aero

The reason those work well on diesels is the huge pressure ratios they need to run to make good power. On a gas engine that runs relatively low boost it just wouldn't work that well.

PoweredT3A6

Complex...your brain is not very complex...Turbo one wouldn't spool turbo 2...TURBO ONE WOULD HELP INCREASE POWER AND RPM UNTIL EXHAUST FLOW WOULD HAVE ENOUGH CFM TO SPOOL NUMBER 2...Sequential turbo setups are common for Diesels because of their reliance on boost for all of their power, also because to handle the amount of boost that you would be forced to accomodate with that setup. Imagine, the first turbo would be a Chrysler conquest turbo(tiny), on a GSR motor with LS tranny. Second turbo would be a larger trim T4 or a GT35r. The long gears, somewhat large displacement and capacity for RPM, would allow you to spool the t25 by 2000 rpm and it would reach maximum efficientcy by 5000. The T4 would spool by 4000 easily and reach maximum efficientcy by redline, therefore creating a sequential setup....BUT the problem would be...once the t25 got maxed out it would spin too fast and eat ---- after 2 days. So it becomes more complex and not so easy to do espescially on a high reving monster like a honda...remember diesels rev to 3k...