VT5 is on

[golisago]

Ok then lol ditto!

 

[golisago]

Ok then lol..

Although from a couple of things you have now said in this thread, it is clear that you know far less about the VT5 than you claim to know.

If you think that its a 100% ok with me.

 

[shadowmaker]

Here's a graph of gt2256v (from 2.5TDI Audi) in my friends 1.9TDI (-99 Golf IV). This isn't correctly mapped as it was impossible to do so for two reasons:

1. Compressor wheel is too big for this engine and causes really bad surge until 3000rpm. Fueling had to be kept low to avoid it.

2. Turbine is too small as EMP raised badly after 4000rpm with only 1,6bar so no point to add fuel in the high rev range either.

We decided to let it be like this for the moment and look for better turbo. With this setup there's no smoke, so with better turbo we hope it will make some decent numbers.

230hp, 450Nm

 

[basstard]

Here's a graph of gt2256v (from 2.5TDI Audi) in my friends 1.9TDI (-99 Golf IV). This isn't correctly mapped as it was impossible to do so for two reasons:

1. Compressor wheel is too big for this engine and causes really bad surge until 3000rpm. Fueling had to be kept low to avoid it.

2. Turbine is too small as EMP raised badly after 4000rpm with only 1,6bar so no point to add fuel in the high rev range either.

We decided to let it be like this for the moment and look for better turbo. With this setup there's no smoke, so with better turbo we hope it will make some decent numbers.

230hp, 450Nm

Sorry, what do you mean with EMP? exhaust gas temp [EGT]?

Go hybrid.

 

[golisago]

Sorry, what do you mean with EMP? exhaust gas temp [EGT]?

Go hybrid.

Exhaust to manifold pressure!........so there you have it from another person (shadowmaker) who like myself Mike knows what where talking about!!!

And the turbo Jason has is acting very much true to form.....what this will do which Shadow has menstioned is limit the fuel injected which will limit power.....this was confirmed on friday when Jabba could only achieve around 210/215hp max.

 

[basstard]

I don't understand this,,, a too big compressor wheel limits the injection quantity? why?

Could someone explain this please?

So steve, you sayin that the compressor side of the VT5 is just too big for a 1.9?

I really don't know what to think. Will wait and see what happens when Jason takes the car to allards.

If mike is right allard should get big power out of the vt5 [which I hope for jason] and jabba isn't up to the business when it comes to diesel.

If steve is right then allard won't get much better figures than jabba and we'll know if their turbos are good stuff or not.

It'll deffo be interesting.

 

[Triple D]

Usually allards advise new uprated injectors when running with a VT5, unless you can get the fueling in there some other way, like mike has with NOS and Propane so no need to whack huge aounts of fuel into the engine to achive the proper power.

Maybe Jabba just dont have the knowledge, experiance with the TDI's to beable to map anyting bigger than the usual VT2 size turbo that allards sell

 

[golisago]

Usually allards advise new uprated injectors when running with a VT5, unless you can get the fueling in there some other way, like mike has with NOS and Propane so no need to whack huge aounts of fuel into the engine to achive the proper power.

Maybe Jabba just dont have the knowledge, experiance with the TDI's to beable to map anyting bigger than the usual VT2 size turbo that allards sell

If you read what you have just said above again you'll find that you have contradicted the part about getting more fuel inn.....i don't know who has put you guy's off the pd race injectors or the ones i've just sorted for someone (a friend).....the pd race + injectors which should give around the 280hp region.......but its just not true , they just need setting up correctly .

To be honest Allard were not fully happy with the way Jasons lpg was setup /located under the hood.....the best way to go with td's is to for one keep it simple which would be to go with larger injectors (alway has bin always will be) and then to find a turbo that will give enough spool low down but still be able to flow enough upstairs with out too much emp differential..

So complicating things by the way of another FUEL e.g LPG when larger injectors could have been used is just pedantic and for show and shine!!!....if you take a look at Rue's motor / setup at 242.7hp he also has a vnt2056 at 1.6bar boost pressure which shows again the limited pressure produced from this turbo.....he did get more out of it 250 something but found the same thing as did Jabba when higher levels of fuel were added.....erratic boost spiking.

 

[golisago]

I don't understand this,,, a too big compressor wheel limits the injection quantity? why?

Could someone explain this please?

So steve, you sayin that the compressor side of the VT5 is just too big for a 1.9?

I really don't know what to think. Will wait and see what happens when Jason takes the car to allards.

If mike is right allard should get big power out of the vt5 [which I hope for jason] and jabba isn't up to the business when it comes to diesel.

If steve is right then allard won't get much better figures than jabba and we'll know if their turbos are good stuff or not.

It'll deffo be interesting.

Basstard.......not nessasary IQ but heavy or higher amounts of fuelling from the off up to 2500rpm 3000rpm , if you do the turbo will surge ie ( too much boost pressure for the limited amounts of rpm/load achieved which the engine is providing ).

This is the problem with this turbo and vnt's in general and why up to a point they are good......because they react very quickly down low (what they were meant to do and to the fuel injected.......and the bigger you go the more they seam to have problem......but some people have had good results at a compromise....and it depends what you want to do with the car.

 

[devonmikeyboy]

To be honest Allard were not fully happy with the way Jasons lpg was setup /located under the hood.....the best way to go with td's is to for one keep it simple which would be to go with larger injectors (alway has bin always will be) and then to find a turbo that will give enough spool low down but still be able to flow enough upstairs with out too much emp differential..

So complicating things by the way of another FUEL e.g LPG when larger injectors could have been used is just pedantic and for show and shine!!!QUOTE]

Maybe if you where not so rude and arrogant on site Steve people might warm to you more as knowledge is not everything. Threatening Jason s a very low thing to do as he has stayed very neutral through this whole thread and now you are insulting him by calling him pedantic !
So the slight fact that Jason added the LPG to his car long before he took it to Allard's has nothing to do with anything. Plus did you ever think that maybe Jason couldn`t afford to dump his LPG kit for bigger injectors? It is a shame Jabba did not manage to map the car as the more companies that can do this sort of thing the better for us on the street.
On this thread and on threads on other sites you argued that the VT5 was a VNT17 hybrid but now all of a sudden you are saying it`s a stock V6 tdi turbo but you only stated it was a hybrid before to lead people on. So you are either coming on site deliberately leading people on with false information or you you where wrong about the VT5 turbo even though you "claim" to have seen the spec sheet for it. So which is it Steve are you a lair and giving false information to people or where you wrong ?

 

[devonutopia]

Usually allards advise new uprated injectors when running with a VT5, unless you can get the fueling in there some other way, like mike has with NOS and Propane so no need to whack huge aounts of fuel into the engine to achive the proper power.

Maybe Jabba just dont have the knowledge, experiance with the TDI's to beable to map anyting bigger than the usual VT2 size turbo that allards sell

Actually, Allards specifically advised me NOT to go with the race injectors. Anyway, I'm booked in to spend the day at Allards next Tuesday - Shall be there from 10am, and have not got a f****** clue what to do for 8 hours whilst they have the car. I need something to do in Gloucester for 8 hours, and I'll have no car.... Boredom might rule all. I will be very surprised if Allard don't get 270bhp (ish)from the car with gas and diesel, with NOS doing "god knows what"

Hoping to get a couple of runs on TSR's MAHA rolling road on the journey back down the M5 to Devon. We'll see what I have to report in 8 days time.

 

[DIFT]

Good luck Jason

 

[Triple D]

jason, they are a great bunch down there, and have served me greatly when i had my problems with both turbos blowing up on me. Lloyd even let me help change the first one when it went wrong, put everything aside for me aswell as i had traveled down een though i had been told they had no room or time as they were preping 2 golf gti's, yet he dropped everything to help me out great customer service imho.

Just ask lloyd if you can watch what they do

 

[devonutopia]

Well, I don't really want to hang around getting in their way. I think they reckon I'm some kind of spy, whereas actually I'm more than happy to grab a spanner/wrench and try and help out.

My minor oil leak resurfaced though, so they're gonna need to do a minor mechanical repairs before the mapping.

I noticed the good luck - Is this in regard to the mapping or me finding 'owt to do for s few hours on the outskirts of Glos....

 

[Triple D]

probably the mapping id have thought
I was always in two minds to go to he next stage wheich was injectors and a VT5 turbo with propane aswell for extra measures, but i would have then needed a ATB diff also imho.............. just couldnt justify how much it would cost to get there though, and then i had the misfortuen of writing my car off aswell

RIP BP 05 LBF

 

[DIFT]

Good luck was to the mapping, but now you mention it, good luck in filling your few hours in the middle of no where

 

[devonutopia]

Reminded me I have an open O2M box sat in a garage with a Peloquin diff about to go in. Looks like I'll have the power done, before the spare box goies in....

If anyone knows of anything to do in Quedgely, Gloucester - give me a shout.

 

[Triple D]

Go to forge?

 

[devonmikeyboy]

Reminded me I have an open O2M box sat in a garage with a Peloquin diff about to go in. Looks like I'll have the power done, before the spare box goies in....

If anyone knows of anything to do in Quedgely, Gloucester - give me a shout.

There`s nothing to do mate believe me i have looked many times. I might pop up on Tuesday if you don`t mind.
I see Steve/Golisago/mojogoes is banned again and bitching on TDI club that he doesn`t know why. It about treating people with respect when you come on site Steve. Just because you are 6ft plus and 20 stone with a lot of diesel tuning knowledge does not give you the right to be rude,arrogant and threaten people. If you posted on TDI club what you posted here you would soon be banned from there to. End of rant.

 

[devonutopia]

I don't mind if you pop up Tuesday, Mike. I can get a go in your car then, behind the wheel? [no need to swear! ]

Sounds like I need to bring a good book or something then....