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#225
by
andy2
on 11 Jul, 2007 19:35
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Well I've had both the hx30 @29psi and hy35 @20psi on as a single now and have just now built a hybrid sort of like Hilfolk'r only I used the hx30 turbine housing and it's wheel along with the hy35's centersection and compressor.No machining required direct bolt-on.This should make it spool quicker.I'll have it on soon enough for some results :wink:
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#226
by
Helliouse
on 12 Jul, 2007 09:06
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Here is that picture I was going to do up.
Shot at 2007-07-12
My only concern with it is the expantion and contraction rates of the block and head, you could to a two ring design, but i think that it might be more suseptable to it.
I am not sure if you would need to to the recieving cut for these, if you kept them low enough only to deform the gasket to provide a better seal.
I am also thinking that Dave's, from PP, contact might be right with a fiber gasket, it would form better to the rings.
Any way, just an idea, let me know if I am way off on this.
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#227
by
andy2
on 13 Jul, 2007 17:17
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Your idea looks a bit too bluky for the this head (IDI) its tight enough to use 1 o-ring!Also if you look at the pics of my head you would see that we had to machine around the prechambers which could not work with your idea but Your idea would work on a TDI.
Part of the issue with sealing the head to block is due to using a turbo(s) that are not proprely sized which leads to high turbine inlet pressure preventing the exhaust from leaving the cylinders thus increasing cylinder pressures and raising combustion temps also.
The hybrid hx30/hy35 still won't cut it with 29 psi boost/32psi drive pressure and EGT's pegged the whole time.I'll be putting an hx35 compressor onto the hx30 turbine next hoping that is will raise boost and equalize drive psi/boost pressure,Any thoughts?
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#228
by
jtanguay
on 13 Jul, 2007 18:47
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4" exhaust and dave's pulsed manifold?
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#229
by
andy2
on 01 Nov, 2007 18:12
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Well I'm back to 2 turbos again for the next test we are putting a heavier spring in the k24 wastegate to better control higher boost levels.The big turbo is a non wastegated H1C off an early cummins 5.9L.The head is off to get cryo treated and to modify the precups to lower the CR and flow better.14mm headstuds are going in this time to try and keep the head down and the Inj pump is off for some more tweaking also.I really hope we can get this thing to work this time around as there are some soon to be high power TDI's that I'd like to meet up with at the track next year :twisted:.
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#230
by
malone
on 01 Nov, 2007 18:58
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Keeping an eye on this one!
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#231
by
SMOKEYDUB
on 01 Nov, 2007 20:01
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i will be at that track next year with my rabbit :twisted:
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#232
by
zukgod1
on 02 Nov, 2007 10:32
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I cant tell ya how much I would love to see you make this work.
I have a hy35 sitting around I would love to use on something..
Keep thinking I'll just put it on the wifes Durango :twisted:
Would rather have it on my jetta though.
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#233
by
gnavs
on 19 Nov, 2007 08:45
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crazy stuff, eagerly awaiting updates
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#234
by
dillenger1
on 29 Dec, 2007 04:17
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Is that last pick yer oil pump pulley?
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#235
by
andy2
on 29 Dec, 2007 11:04
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Yeah that pully was made up over 2 years ago to raise to oil pressure as adding a second turbo lowered the pressure enough.My 1.9 engine uses the shorter 1.6td timing belt now :wink:.
14mm headstuds are now ready to go.We drilled and tapped the bigger thread in the block without removing/dismantling the engine.The head has been machined to accept the studs and hardware as well.
The pre cups have now been modded to flow better and lower the CR.Glow plugs have been replaced with custom made blank off bolts to this was done to help reduce the CR a bit more and to get the tip out of there as it does nothing for performance :twisted:.
A bigger hybrid k26/24 has been made up this time.Its basically just the Audi k26 with a machined out k24 turbine housing to accept the bigger k26 wheel.The water cooled center housing was swaped out for the k24 one as I was not interested in using the water cooled section.
Some more calculating was done to help size the 2 turbo's this time around.Slowly getting that figgered out
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The inj pump of off getting the fueling jacked up as well.
Thats all for now.
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#236
by
subsonic
on 29 Dec, 2007 14:14
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The pre cups have now been modded to flow better and lower the CR.
Got any more info on this?
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#237
by
zaprzal
on 30 Dec, 2007 02:16
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A bigger hybrid k26/24 has been made up this time.Its basically just the Audi k26 with a machined out k24 turbine housing to accept the bigger k26 wheel
you mean, stock k24 center and housing, only bigger k26 compressor and exhaust wheels?
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#238
by
andy2
on 30 Dec, 2007 10:47
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A bigger hybrid k26/24 has been made up this time.Its basically just the Audi k26 with a machined out k24 turbine housing to accept the bigger k26 wheel
you mean, stock k24 center and housing, only bigger k26 compressor and exhaust wheels?
Now I'm confused :lol: The k26 shaft dimensions are the same as the k24 so I was able to put the k26 shaft into the k24 center housing.the machine the k24 turbine housing to accept the k26 wheel.
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#239
by
andy2
on 30 Dec, 2007 10:51
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The pre cups have now been modded to flow better and lower the CR.
Got any more info on this?
The pre cups are not orignal they are heavily modified GM 6.5TD pre cups basically.I started off with GM 6.2 precups and have now modded them to the same as the 6.5TD precups.The prechambers are basically double the stock CC's now.I have high flow 6.5 TD marine nozzles on order.They should be a good match for the prechamber and flow more than other IDI nozzles i think??