Author Topic: twin turbo  (Read 19719 times)

January 10, 2009, 04:01:00 pm

rov716y

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« on: January 10, 2009, 04:01:00 pm »
i am toying with the idea of putting twin turbo's on my aaz two k03's on exhaust manifol off 1 and 3 and other on 2 and 4 then exhaust running into one after that.  running two small intercoolers and inlet into the same cylinders the turbo is running off.  but one thing is making me think the fuel enrichment on the pump i would need to connect both boost lines to it so this would make both turbos boost the same or would it?  

do you think this would work?  does anyone know if anyone has done this and have any links to the build.  i would make all the manifolds etc myself.



Reply #1January 10, 2009, 04:03:55 pm

Jasonsmack

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« Reply #1 on: January 10, 2009, 04:03:55 pm »
Just an idea: I think you would end up with a more balanced/smooth running engine if you made the turbos flow into one intercooler or intake manifold.

Reply #2January 10, 2009, 04:05:12 pm

dillenger1

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« Reply #2 on: January 10, 2009, 04:05:12 pm »
Id ditch the 2 ko3 idea and run a big n small.I would run the larger one off the smaller one on the manifold.Just weld a tube from the  small compressors ouitput to the large compressors induction.You would need to use the small turbos waste gasses to run the large one tothen exit to downpipe.then run the large compressor into the intake.One boost line is only needed as the fuel will come on as boost rises.before anything due head studs and a mls gasket.
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Reply #3January 10, 2009, 04:47:38 pm

rov716y

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« Reply #3 on: January 10, 2009, 04:47:38 pm »
i am looking for simplicity as i am not oveerly technicly minded!  a small and a bit turbo plummed in parralel sounds a bit more interesting.  small for low down and big for higher power.  

both plumed to all four cylinders and an intercooler.  now i am getting a little excited.  

do you think a 2.25" exhaust system will be big enough to run seriose power?

Reply #4January 10, 2009, 05:45:06 pm

rallydiesel

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« Reply #4 on: January 10, 2009, 05:45:06 pm »
Quote from: "rov716y"

do you think a 2.25" exhaust system will be big enough to run seriose power?


I seriously doubt it.
2006 Jetta TDI - gtb1749v, Malone 2, Frank's Titan 2 cam, VR6 clutch....
1991 Jetta TD - sold :(
2001 Golf TDI - Son's
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Reply #5January 10, 2009, 06:58:12 pm

dillenger1

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« Reply #5 on: January 10, 2009, 06:58:12 pm »
depends,whats serious power?
Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.

Reply #6January 10, 2009, 07:07:28 pm

jtanguay

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« Reply #6 on: January 10, 2009, 07:07:28 pm »
don't forget the added supply of oil pressure required for two turbo's...

i've heard of big block guys using different sprockets in the oil pump to achieve this, but is it possible with our vw oil pumps?  is 36mm the biggest???  there must be aftermarket parts available...


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Reply #7January 10, 2009, 08:06:59 pm

thedeezel1

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« Reply #7 on: January 10, 2009, 08:06:59 pm »
I thought someone else on here was running compound turbos (small feeding big) and he couldn't keep the head in place, even with ARP studs and a MLS headgasket.  I believe he was pushing something like 45-50 psi though.
With a big and little compund setup, even with small (k03 into a k14, k24, k26), what would the projected boost be? The k03 would come on quick, pushing the psi up on the big turbo, but would the big one (k14, k24, k26) still max out at its manufactured limit, or would the increase in incoming boost push that limit up?
I have toyed with this idea also, but didn't think it was possible.

I believe the guy's name was Andy, but I cannot remember.
He had mentioned something about casting an iron head to keep the lid on his setup?

Reply #8January 10, 2009, 08:16:54 pm

jtanguay

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« Reply #8 on: January 10, 2009, 08:16:54 pm »
Quote from: "thedeezel1"
I thought someone else on here was running compound turbos (small feeding big) and he couldn't keep the head in place, even with ARP studs and a MLS headgasket.  I believe he was pushing something like 45-50 psi though.
With a big and little compund setup, even with small (k03 into a k14, k24, k26), what would the projected boost be? The k03 would come on quick, pushing the psi up on the big turbo, but would the big one (k14, k24, k26) still max out at its manufactured limit, or would the increase in incoming boost push that limit up?
I have toyed with this idea also, but didn't think it was possible.

I believe the guy's name was Andy, but I cannot remember.
He had mentioned something about casting an iron head to keep the lid on his setup?


yea his username on here is andy2.  hes running some crazy compound setup thats for sure!  with the fuel he was running the head was actually deforming (wimpy weak aluminum  :roll:) so he is working on a cast iron head.  AFAIK it's nearly done.  his boost is probably in the range of 50-60 psi.  

now for a normal compound setup, i would highly recommend a K03 with possibly a K26 hybrid turbo.  a setup like that would extremely responsive in low to high rpm range.  but for me i would rather just simplify things and go with the single vnt turbo.


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Reply #9January 11, 2009, 05:31:08 am

rov716y

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« Reply #9 on: January 11, 2009, 05:31:08 am »
Quote from: "rallydiesel"
Quote from: "rov716y"

do you think a 2.25" exhaust system will be big enough to run seriose power?


I seriously doubt it.


between 150 and 200 bhp  

2.25" i the biggest i can get past my rear axle.  2.5 touches the tank and axle.

Reply #10January 11, 2009, 05:34:54 am

rov716y

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« Reply #10 on: January 11, 2009, 05:34:54 am »
reason i say 2 k03's is cheap fun power. i'm not rich infact i'd say i'm poor,  and k03's are easy and cheap to come by. i'd be making everything from scratch inc exhaust system. i dont want crazy power

Reply #11January 11, 2009, 11:49:31 am

TurboJ

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« Reply #11 on: January 11, 2009, 11:49:31 am »
Here's one compound twin turbo system on a 1.9 TD (AAZ):

---------------------------------------
Jetta II 1.6 TD 'Project 200'

Reply #12January 11, 2009, 12:41:14 pm

rallydiesel

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« Reply #12 on: January 11, 2009, 12:41:14 pm »
I think it can work if you keep EMP down. So you would need serious exhaust porting, external wastegate to bypass the small turbo at high exhaust flow, etc...
2006 Jetta TDI - gtb1749v, Malone 2, Frank's Titan 2 cam, VR6 clutch....
1991 Jetta TD - sold :(
2001 Golf TDI - Son's
1981 Rabbit - BEW tdi swap project

"ONCE YOU GO CLACK, YOU NEVER GO BACK"

Reply #13January 11, 2009, 12:52:54 pm

53 willys

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« Reply #13 on: January 11, 2009, 12:52:54 pm »
when I do my compound set-up it will be a K14 over K26....yummy :twisted:

andy2 was running a cummins turbo for the bottom right??
I bet that cummins turbo=lots of drive pressure/turbine inlet psi??=REALLY hard on a head gasket????

Reply #14January 11, 2009, 12:55:56 pm

DYNOMAX

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« Reply #14 on: January 11, 2009, 12:55:56 pm »
Something like this.
Two step.

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


 

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