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twin turbo
by
rov716y
on 10 Jan, 2009 16:01
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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.
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#1
by
Jasonsmack
on 10 Jan, 2009 16:03
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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.
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#2
by
dillenger1
on 10 Jan, 2009 16:05
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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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#3
by
rov716y
on 10 Jan, 2009 16:47
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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?
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#4
by
rallydiesel
on 10 Jan, 2009 17:45
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do you think a 2.25" exhaust system will be big enough to run seriose power?
I seriously doubt it.
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#5
by
dillenger1
on 10 Jan, 2009 18:58
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depends,whats serious power?
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#6
by
jtanguay
on 10 Jan, 2009 19:07
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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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#7
by
thedeezel1
on 10 Jan, 2009 20:06
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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?
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#8
by
jtanguay
on 10 Jan, 2009 20:16
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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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#9
by
rov716y
on 11 Jan, 2009 05:31
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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.
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#10
by
rov716y
on 11 Jan, 2009 05:34
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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
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#11
by
TurboJ
on 11 Jan, 2009 11:49
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Here's one compound twin turbo system on a 1.9 TD (AAZ):
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#12
by
rallydiesel
on 11 Jan, 2009 12:41
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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...
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#13
by
53 willys
on 11 Jan, 2009 12:52
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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?
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#14
by
DYNOMAX
on 11 Jan, 2009 12:55
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Something like this.
Two step.
I would try to feed the bigger compressor with the smaller one.