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#120 by TDForNow on 06 Jul, 2006 08:15
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Nope, I see a mag-clutch on the s/c drive pulley, the bypass valve is there for free air flow when the s/c is disengaged.
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#121 by RAMMSTEIN on 07 Jul, 2006 12:13
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Ok, that's the purpose of this magnet clutch.
This is on the TSI engine (gas engine in Europe).
I guess that on a diesel you could disregard the magnetic clutch and have the SC blow let say 20 psi at all time.
The intake bypass is probably there to help the turbo suck as much air as it needs at higher revolution while when closed pressurise the pipe in between the SC and T at lower revolution.
I'd put another intercooler (Ladeluftkühler) after the SC, not obstructing the by pass.
Air would be colder before getting to the turbo.
Anyway, it's always good to have a few options.
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#122 by RAMMSTEIN on 07 Jul, 2006 12:29
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I was thinking about this bypass valve: it's the only thing missing on Andy's setup, a bypass valve to let the big turbo breathe adequately.
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#123 by andy2 on 15 Jul, 2006 16:33
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A pic of the latest attempt at getting it to work properly :lol: !! This is the Vw T3 and the hy35 on top.I figured again with it all apart I had better take a pic as its pretty well hidden in the engine bay. -
#124 by DVST8R on 15 Jul, 2006 20:57
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So is the big pump and the cam going on at the same time?
Lookin hot.
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#125 by andy2 on 16 Jul, 2006 09:31
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The cam will go in after I get it up and running again.First I'll see how the turbos work and then put the cam in to see how it changes things.Shortly after testing the cam I will then put the 12mm pump on. One thing at a time. I believe I will increase feuling on the 12mm pump to 105CC's full load fueling(86cc's now),That may just be the key to making the hy spool that much better.
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#126 by andy2 on 08 Aug, 2006 18:46
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Ok,so I've got the turbos back on and running.Still not working right but I believe that it may be due to the fact that the engine is running under fueled.On 23 psi now I can hardly get the pyro above 1200 deg,before on 37 psi I could peg the pyro at 1500 by fourth gear :shock:.With the lowered compression and increased cc's in displacment this engine needs more fuel!
I've upgraded the fuel supply pump its the same one that hilfolk'r using form the ISB cummins.I was using the one from a 6.5TD powered chev before and it barely kept up with demand.
Tonight I put brand new mercedes nozzles in place of the GTD ones.The engine runs 25-50 rpm higher cold and hot so I'm sure they are delivering more fuel however its not enough to really notice,possibly 5 hp I'm not sure?
Also directly after that test drive I installed Dave's Stg 3 camshaft from Passenger Preformance.Again I didn't really feel any noticeable gain in preformance,Perhaps a second cut from spool time and mabye 25 deg from egt's.
Because my engine is not fueled properly yet I would say that the gains from both the nozzles and espically the cam have not really been fully seen yet!!
I don't even rev the engine that high right now as its running low on boost with the small T3 set to 23 psi.As soon at 23 psi comes at lower rpm there is'nt much more torque after that.
I'll be working with the inj pump at my work with the asistance of my Boss.Swaping it to 12mm soon as well as some other setup changes while on the test bench.
Oh, and I had to replace my new coolant temp gague as it was a dud(isspro) new one works great though.Also done some body work to the car and got some cheap paint put on :roll:.The other biggest job of all was definitely changing the heater core,If you've changed one for the first time you know what I mean :evil:.
I think thats about all for now.
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#127 by therabbittree on 09 Aug, 2006 04:44
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any pics of the car with the new setup installed? from your post it seems like theis new combo drives better? no?
thanks
Deo
\x/ hillfolk! -
#128 by Benjamin on 09 Aug, 2006 05:07
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can you give enough feul under boost with such big twin turbo? :shock:
Is the LDA the only mod with this twin turbo to give more diesel under pressure?
Greetz, Benjamin -
#129 by andy2 on 09 Aug, 2006 09:32
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Deo,theres a pic of the engine bay on page 7 of this thread :wink:.I think this car is a little slower only because this car weighs a little more than the A2 jetta.
The pump can be cranked up good with the 12mm setup,It will be set at 105cc's full load fueling(at 86 now). -
#130 by Benjamin on 09 Aug, 2006 11:20
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Quote
The pump can be cranked up good with the 12mm setup,It will be set at 105cc's full load fueling(at 86 now).
i assume its 86cc/min ?? on wich rpm :roll: (wich make 160WHP!?!)
A guy here is talking about a his race engine in a caddy wich rev's 7000rpm and 280cc, he even can go higher with a VE pump :roll:
his max EGT's should be between 1740-1920F (950-1050°C)
Greetz, Benjamin
edit, its a vw caddy 1.9 -
#131 by andy2 on 09 Aug, 2006 15:15
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I believe its cubic mm/stroke,perhaps someone else could confirm?
7000rpm+280cc+1900F :shock: thats pretty insane,whats the hp goal, 300 hp on 60 psi boost??
I was quite happy with my 160 whp @4000 rpm with 86cc and 30 psi. -
#132 by Giles@PerformanceDiesel on 09 Aug, 2006 18:31
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hi guys
the 86cc's is measured per 1000 injections
so it's 86 cc's @1000 injections.
not /min or Ib's / hr. like gas is measured.
Giles -
#133 by Kantdrive55 on 10 Aug, 2006 08:23
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I am trying to get used to dealing with the smaller pumps. I work for a diesel shop that specialized in pick up truck performance. We have built a P7100 that flows over 1000cc :shock: Now you need a whole lot of air to burn that. The twin setup on this truck is running in the 110-115psi range. Puts about 900hp to the ground with over 1700lbft of torque. I want to get my little 1.9 up to 175hp to the ground. I guess I have a way to go.
We are also a Airwerks engineering shop here. I have our turbo engineer mapping out both a single and a compound system that will work on this engine. I will keep you all posted on what we come up with. :twisted:
Gilles, I hear you make a killer pump so when my fueling needs come up I am going to pick up one of your pumps. -
#134 by Benjamin on 10 Aug, 2006 09:51
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@Kantdrive55: what is a P7100? a pump?
can you answer this topic?
http://www.vwdiesel.net/phpBB/viewtopic.php?t=4244&highlight=gt2252vQuoteI will keep you all posted on what we come up with
yeah, you do that!
Greetz, Benjamin
