Author Topic: twin turbo (Read 19814 times)

53 willys · « **Reply #15 on:** January 11, 2009, 12:59:13 pm »

TRUE twin turbo on diesel's=yuck
compound turbos on a diesel=FTW!!! :twisted: :twisted: :twisted:

nogama3 · « **Reply #16 on:** January 11, 2009, 03:16:03 pm »

this thread has got my interest...sounds like a cool idea.

DYNOMAX · « **Reply #17 on:** January 11, 2009, 03:30:12 pm »

A cool thing to do would be to use the Garrett T2 + T3 or KKK K14 + KKK K24 in a streetfriendly twinturbo setup.

1.6 or 1.9 TD

dillenger1 · « **Reply #18 on:** January 11, 2009, 08:32:35 pm »

hahaha street friendly

rallydiesel · « **Reply #19 on:** January 11, 2009, 09:19:49 pm »

Personally, I would go with k14 (preferable) or ko4 and something quite a bit bigger than stock for the high flow like a holset hy35 or some other smallish 6 cylinder turbo.

dillenger1 · « **Reply #20 on:** January 12, 2009, 06:25:51 am »

this always comes up.Its funny,but we all know that the heads cant take it.There have been post of people that say they can do it successfully,but i dont know about reiability or streetable.

Turbinepowered · « **Reply #21 on:** January 12, 2009, 06:59:23 am »

Quote from: "DYNOMAX"

Something like this.
Two step.

I would try to feed the bigger compressor with the smaller one.

So for compounds you run the exhaust gas through the big one first, then the little one? So the small turbo is feeding it's compressor outlet into the compressor inlet of the larger turbo?

I always thought it went the other way around, with a small (high-pressure) turbo feeding off the exhaust gas first and being fed the "low pressure" discharge from a larger turbo. You get the larger turbo loafing along at say a nice 1.5:1 or 2.0:1 pressure ratio feeding air into the smaller one running along at similar 1.5:1 or 2.0:1 pressure ratio... voila, you have responsiveness on the bottom end and an overall 2.25:1-4:1 pressure ratio.

Have I missed something here? :?

arb · « **Reply #22 on:** January 12, 2009, 11:52:21 am »

Quote from: "DYNOMAX"

Something like this.
Two step.

I would try to feed the bigger compressor with the smaller one.

Nice looking plumbing, but why no intercooler and no turbo oil lines ?

zukgod1 · « **Reply #23 on:** January 12, 2009, 12:23:09 pm »

Quote from: "arb"

Quote from: "DYNOMAX"
Something like this.
Two step.

I would try to feed the bigger compressor with the smaller one.

Nice looking plumbing, but why no intercooler and no turbo oil lines ?

Oh come on man!! :lol:

It's sitting on an engine stand so it's just mocked up.

dillenger1 · « **Reply #24 on:** January 12, 2009, 05:14:59 pm »

The small turbo is on the exhaust manifold.Seems the small compressor would just work alone to feed the engine till its overcome by the big one ,thats been spooling up in the back ground.I love it!

I always thought the small ones boost would help spool the bigger one,not just the exhaust.thats one bad cummins(even on a stand)

nogama3 · « **Reply #25 on:** January 13, 2009, 07:39:17 am »

stick to your original plan fella, and then you can always make changes afterwards. i hope all goes to plan and keep us updated with pics, blogs...

nogama3 · « **Reply #26 on:** January 16, 2009, 04:09:14 pm »

any updates on what you have decided???
also, what are compound turbos and whats the difference between the turbos mentioned?

jtanguay · « **Reply #27 on:** January 16, 2009, 04:55:28 pm »

if the larger turbo feeds into the smaller turbo, would there be any worry of turbo overspeed, or surging due to overspeed?

just curious...

andy2 · « **Reply #28 on:** January 16, 2009, 05:28:25 pm »

Thing with compounds is that as the low pressure turbo starts to force feed the high pressure turbo it causes the low pressure turbo to slow down as it now has to work harder.The key is keeping the high pressure's shaft speed consistant as the low pressure force feeds :wink:.

It is very possible to run a well tuned set of compounds without wastegates.Basically the low pressure turbo is used to regulate the high pressure turbo's shaft speed.

nogama3 · « **Reply #29 on:** January 17, 2009, 05:01:37 am »

Andy2, how are things going with your project?

Author Topic: twin turbo (Read 19814 times)

53 willys

arb

andy2