Big turbo for the dervs

My dyno figures are next to the avatar (which I don't have): 310hp with 1,3bar. Actually it did 310hp between 3900-4900rpm where boost was dropping from 1,5bar to 1,3bar. On road it keeps 1,9-2,0bar after spool up, so that's why I'm guessing here.

Hmm. 1200kg and 226bhp is 5,3097kg/bhp and that relates 372,9bhp on my 1980kg van. On the other forum I calculated 375bhp from similar case. At least I haven't been lying when I have said that it has 350hp currently.

Actually it has zero bhp now as engine is taken apart and bi-vnt-turbo project has started...

Here's an old dyno with the same top hp, but with original MAF. With bigger MAF it did 310hp up to 4900rpm, but I have no dyno plot from it anymore.



Here's a time slip.



and here's the run.

http://www.youtube.com/watch?v=hkSTslJf7Z4

devonutopia said:

Could be a lot in power delivery too. Does the T4 send power to the back wheels?

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No, it's FWD.

My turbo from turbo technics is based on the v6 tdi with 360 bearing etc. Told by tt its good for 300hp but I would not want anywhere near that as I cover 700 miles every week! Have now covered 142k.
Glynn

glynnd said:

My turbo from turbo technics is based on the v6 tdi with 360 bearing etc. Told by tt its good for 300hp but I would not want anywhere near that as I cover 700 miles every week! Have now covered 142k.
Glynn

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Was the turbo a direct bolt on or did you need a custom manifold?

Bolts direct to original manifold as the build uses the exhaust side of the 150 with the compressor side of the v6 tdi. I remember being suprised at the difference in the size of the compressor housing on the hybrid. Apparently the comp wheel is 3mm bigger than the std 150 comp wheel. Takes ages to come on boost but when it does it goes hard.
Glynn

shadowmaker said:

No, it's FWD.

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Very nice vid, and a good time. Doesnt smoke to badly aswell! Ive got to sort out water/meth and a better intercooler I think first before upping my power to 260hp.

Im glad it fits in line with what power you should have atm.

glynnd said:

My turbo from turbo technics is based on the v6 tdi with 360 bearing etc. Told by tt its good for 300hp but I would not want anywhere near that as I cover 700 miles every week! Have now covered 142k.
Glynn

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I got quoted the V6 hybrid from TD was good for 300hp also.

glynnd said:

Bolts direct to original manifold as the build uses the exhaust side of the 150 with the compressor side of the v6 tdi. I remember being suprised at the difference in the size of the compressor housing on the hybrid. Apparently the comp wheel is 3mm bigger than the std 150 comp wheel. Takes ages to come on boost but when it does it goes hard.
Glynn

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Thats annoying, as I was told by TD, their's wouldnt fit our manifolds. As I couldnt be arsed to find a custom manifold, never got the V6 version. Where is max bhp and torque mate?

This thread is killing me.....

Tried to "car boot" the Mrs this morning to raise the funds to put towards the turbo but she kept wriggling and falling off the pasting table and I think it put people off.

S3 AKR said:

This thread is killing me.....

Tried to "car boot" the Mrs this morning to raise the funds to put towards the turbo but she kept wriggling and falling off the pasting table and I think it put people off.

Click to expand...

glynnd said:

Bolts direct to original manifold as the build uses the exhaust side of the 150 with the compressor side of the v6 tdi. I remember being suprised at the difference in the size of the compressor housing on the hybrid. Apparently the comp wheel is 3mm bigger than the std 150 comp wheel. Takes ages to come on boost but when it does it goes hard.
Glynn

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T. Spark said:

I got quoted the V6 hybrid from TD was good for 300hp also.

Thats annoying, as I was told by TD, their's wouldnt fit our manifolds. As I couldnt be arsed to find a custom manifold, never got the V6 version. Where is max bhp and torque mate?

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I cannot believe a turbo using the exhaust side of a Gt1749V plus stock manifold would be big enough to flow enough gasses for 300bhp. The bore on my VT6 manifold is nearly twice the width of a standard manifold. If the compressor wheel is 3mm bigger that makes the turbo a GT2049V unless they have enlarged the exhaust side wheel but the turbo outlet still needs to be bigger to let the flow out which is why a larger bore manifold would be needed. I am not having a go at you Glynn as you are only repeating what Turbo Tech told you.
shadowmaker can you please give an opinion on this as you know turbo`s inside out.

T. Spark said:

Very nice vid, and a good time. Doesnt smoke to badly aswell! Ive got to sort out water/meth and a better intercooler I think first before upping my power to 260hp.

Im glad it fits in line with what power you should have atm.



I got quoted the V6 hybrid from TD was good for 300hp also.



Thats annoying, as I was told by TD, their's wouldnt fit our manifolds. As I couldnt be arsed to find a custom manifold, never got the V6 version. Where is max bhp and torque mate?

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Dont know the answer to either of those sorry!

devonmikeyboy said:

I cannot believe a turbo using the exhaust side of a Gt1749V plus stock manifold would be big enough to flow enough gasses for 300bhp. The bore on my VT6 manifold is nearly twice the width of a standard manifold. If the compressor wheel is 3mm bigger that makes the turbo a GT2049V unless they have enlarged the exhaust side wheel but the turbo outlet still needs to be bigger to let the flow out which is why a larger bore manifold would be needed. I am not having a go at you Glynn as you are only repeating what Turbo Tech told you.
shadowmaker can you please give an opinion on this as you know turbo`s inside out.

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TBH I had lots of questions about the hybrid after i had paid for it and fitted it to the leon. I used tt as I had purchased a t2 for fieta rs about 4 years ago and they were good as **** and the price was better than other places i tried. Anyway all I can say is that I would not use tt again for a hybrid build as the answers were so vague that it left me somewhat deflated about wether I had bought the right turbo for the leon. Sure it works fine when its spinning quick enough, but it performs more like a petrol turbo than a diesel. Maybe this is how it is, perhaps tt told me a load of rubbish re possible power outputs for the unit. I think 350lbft at 2300rpm is ok and sure the leon still returns 50mpg and will post a 30 to 70 thru the gears in less than 6 seconds. What do you think Devon could I have bought something better for similar money?
Glynn

devonmikeyboy said:

I cannot believe a turbo using the exhaust side of a Gt1749V plus stock manifold would be big enough to flow enough gasses for 300bhp. The bore on my VT6 manifold is nearly twice the width of a standard manifold. If the compressor wheel is 3mm bigger that makes the turbo a GT2049V unless they have enlarged the exhaust side wheel but the turbo outlet still needs to be bigger to let the flow out which is why a larger bore manifold would be needed. I am not having a go at you Glynn as you are only repeating what Turbo Tech told you.
shadowmaker can you please give an opinion on this as you know turbo`s inside out.

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I'm just guessing here , but you need a compressor wheel capable for at least 2,5bar with good efficiency. They are hard to find among small core vnts... Flow isn't that important as any wheel capable for 2,5bar flows enough. With modified 16v head I'd say that 2,0-2,2bar is enough.

Turbine side on gt20v is rediculous for 300hp. Even gt25v hot side has troubles to flow enough without too much EMP. Turbine big enough for 300hp can be somewhat laggy if one does not know how to compensate this. I bet we are seeing 1.9tdis with road usable 300+hp soon (no NOS)...

And then there is always staged vnts..

shadowmaker said:

I'm just guessing here , but you need a compressor wheel capable for at least 2,5bar with good efficiency. They are hard to find among small core vnts... Flow isn't that important as any wheel capable for 2,5bar flows enough. With modified 16v head I'd say that 2,0-2,2bar is enough.

Turbine side on gt20v is rediculous for 300hp. Even gt25v hot side has troubles to flow enough without too much EMP. Turbine big enough for 300hp can be somewhat laggy if one does not know how to compensate this. I bet we are seeing 1.9tdis with road usable 300+hp soon (no NOS)...

And then there is always staged vnts..

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I want a 1.9TDi with road usable 300+hp please

shadowmaker said:

I'm just guessing here , but you need a compressor wheel capable for at least 2,5bar with good efficiency. They are hard to find among small core vnts... Flow isn't that important as any wheel capable for 2,5bar flows enough. With modified 16v head I'd say that 2,0-2,2bar is enough.

Turbine side on gt20v is rediculous for 300hp. Even gt25v hot side has troubles to flow enough without too much EMP. Turbine big enough for 300hp can be somewhat laggy if one does not know how to compensate this. I bet we are seeing 1.9tdis with road usable 300+hp soon (no NOS)...

And then there is always staged vnts..

Click to expand...

Mine peaks at 2.2 bar and settles to 1.9. When i left Jabba I had 207.5 hp but since then I have found that my stat was sticking open and the engine was staying cool. Michael commented on my car and noticed that the boost was coming in early but the car did not really pick up as well as those fitted with the turbo dynamics hybrid. But now what a difference since fitting a new stat, it feels like its found another 25hp, particularly above 3k when it really does go very well. I matched a 58 plate s3 from 100 to 125 (off the highway eh!) I was in 5th gear. Now I am very pleased with the way the leon goes.
Glynn

shadowmaker said:

I'm just guessing here , but you need a compressor wheel capable for at least 2,5bar with good efficiency. They are hard to find among small core vnts... Flow isn't that important as any wheel capable for 2,5bar flows enough. With modified 16v head I'd say that 2,0-2,2bar is enough.

Turbine side on gt20v is rediculous for 300hp. Even gt25v hot side has troubles to flow enough without too much EMP. Turbine big enough for 300hp can be somewhat laggy if one does not know how to compensate this. I bet we are seeing 1.9tdis with road usable 300+hp soon (no NOS)...

And then there is always staged vnts..

Click to expand...

Shadowmaker, is there anyway to mechanically reduce the lag? Maybe manipulating the n75/ pipework etc. I know sfs pipework helps, just wondering if there is a different way?
Glynn

glynnd said:

Shadowmaker, is there anyway to mechanically reduce the lag? Maybe manipulating the n75/ pipework etc. I know sfs pipework helps, just wondering if there is a different way?
Glynn

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There are many ways to reduce lag: bigger displacement, low rev area focused cam (don't go lower than you already have ), variable valve timing, variable lenght intake, correctly done 4-1 pulse manifold, heat management, injection timing, a good remap with some effort for spool up area...

There are also different kind of anti-lag systems, but I can't tell you about those...

Like NOS shadowmaker....... Hows your mad project developing?

devonmikeyboy said:

Like NOS shadowmaker....... Hows your mad project developing?

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NOS is nice, but expensive. It also requires some knowledge to use as otherwise that NOS can be VERY expensive...

My project isn't that mad... People behind it might be...
Progress is slow, but evident. Right now I'm working on inlet and exhaust manifolds.

Home made 5-1 collector.


Looking through smal end.

Everyone else makes a four in one manifold but you have to make a five in one manifold! Your GT35v turbo is the size of a small engine to start with. Thought you where using NOS on an anti lag system that you had developed? Not a NOS fan myself either.