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  #21  
Old March 24th, 2015, 03:39 PM
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I'm assuming the 1300 rpm claim came from this thread: Cheapest Turbo upgrade 300TDI - Australian Land Rover Owners
Quote:
It was water cooled and came into action at around 1300RPM instead of 1800RPM with little noticable change throughout the rest of the rev range. Possibly pulled a little better up hills but no figures or comparisons to verify this - just one of those gut feelings.
Love those gut feeling analysis....
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  #22  
Old March 24th, 2015, 03:39 PM
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I thought you said it has been done... So there must be someone that can show it working... There are a lot of very knowledgeable tuners in the UK and they have run some hybrids to get more power and bit better bottom end but nothing like high boost at 1300 rpm.
It has been done, but not by anyone I personally know, so as I said, I'll be the test subject for us over here!
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  #23  
Old March 24th, 2015, 03:45 PM
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no that came from me. Keeping the waste gate closed a little longer lets the turbo spool better.
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  #24  
Old March 24th, 2015, 03:45 PM
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Hey, you won't know until you try it. If it supposedly pulls closer to 1300 instead of 1800, then it would be more than a gut feeling. I'm not going to take the random guys word for it, hence the reason I think it's worth a try. I'd rather spend less than half and try it for myself.
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  #25  
Old March 24th, 2015, 03:47 PM
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no that came from me. Keeping the waste gate closed a little longer lets the turbo spool better.
The wastegate only puts a limit on peak boost. It won't do anything to affect when the boost starts.
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  #26  
Old March 24th, 2015, 03:48 PM
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I wouldnt steer ya wrong J.Pound. No benefit to me if I do!!
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  #27  
Old March 24th, 2015, 03:50 PM
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Quote:
Originally Posted by J. Pound View Post
Hey, you won't know until you try it. If it supposedly pulls closer to 1300 instead of 1800, then it would be more than a gut feeling. I'm not going to take the random guys word for it, hence the reason I think it's worth a try. I'd rather spend less than half and try it for myself.
The problem with believing the thread I linked... If there was a $300 fixed vane turbo that more or less bolted in and gave VNT bottom end boost without reducing top end power, then everyone would be selling kits for $1000 using that turbo.

You can see from the AULRO site, that vendors were selling these kits 10 years ago, but nobody is doing it now and there is a reason.

Go for it, but lets see pre and post dynos.
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  #28  
Old March 24th, 2015, 03:54 PM
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been workin on diesels and turbos for years. Dont ya think if the gate stays closed a second longer it builds better boost and sooner? I could be wrong ........... NOT!!
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  #29  
Old March 24th, 2015, 03:58 PM
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The gate does not move until it reaches peak boost. Nothing happens until then. At the lower engine speed where the turbo and fueling setup is not able to produce peak boost, nothing will change.
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  #30  
Old March 24th, 2015, 03:59 PM
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Quote:
Originally Posted by Red90 View Post
The problem with believing the thread I linked... If there was a $300 fixed vane turbo that more or less bolted in and gave VNT bottom end boost without reducing top end power, then everyone would be selling kits for $1000 using that turbo. You can see from the AULRO site, that vendors were selling these kits 10 years ago, but nobody is doing it now and there is a reason.
Probably has something to do with the vnt popularity. I'm in no way trying to compare this to a vnt set up. Just interested in it due to the reports made and the fact that it bolts up. If I happen to find that it gives me a little more off the line power(which is almost necessary for safety reasons alone! Don't care for having to give myself a mile gap to feel comfortable pulling out!) then I have accomplished my goal. This really seems like a pretty low risk trial run. Yeah, I can spend tons on a vnt and KNOW it'll work, but to quote my buddy tigerdan "where's the fun in that?" Worst case, Im not impressed and can sell it gently used and lose a couple hundred bucks. Best case, it proves to be a good middle option for people who would rather spend 2 grand on something else.
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  #31  
Old March 24th, 2015, 04:02 PM
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Originally Posted by J. Pound View Post
If I happen to find that it gives me a little more off the line power(which is almost necessary for safety reasons alone! Don't care for having to give myself a mile gap to feel comfortable pulling out!).
You need to tun up your fueling. You should be able to accelerate hard and keep up with traffic on the stock turbo. What is your top speed?

Shift down to get the revs above 2000 rpm. That is why there are all those gears.
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  #32  
Old March 24th, 2015, 04:17 PM
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I have an autobox behind my tdi. Fact is, I need to either rebuild my current turbo as its leaking like a faucet, or replace it. If I didn't need to do any work on the turbo, I would just play with the boost a bit and see where it takes me, but since I'm already needing to figure out a turbo, I'm looking at all options. Hence the thread! The idea of a low dollar turbo that can potentially be a nice little upgrade sounds just about perfect for my needs. Might not be for everyone, but for sure sounds good to me. I think it is absolutely worth the risk at the price point it hits. I'd entertain other ideas as well, but since there really isn't any, I think this one is worth a go.
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  #33  
Old March 24th, 2015, 04:20 PM
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Quote:
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The gate does not move until it reaches peak boost. Nothing happens until then. At the lower engine speed where the turbo and fueling setup is not able to produce peak boost, nothing will change.
100% agree with this... there is no additional power on the low end with increased boost pressure it is merely a function of vane design.

That said a VNT provides a more reliable power band because of turbo geometry. The water cooled is just an aux cooling unit, generally they are still oil lubricated tho I can't speak for this mitsu T04.

I mean, a rebuilt turbo is going to cost what ~$400? water fittings, hoses, hope for a 10 year old turbo design...

I'd still rather scrape together the extra $1000 and use a modern turbo that is proven to increase boost at very low rpms and boost reliably for this application.
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  #34  
Old March 24th, 2015, 04:34 PM
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Jt you are right. But for his dollar amount the td04 will do just fine. the boost isnt greater just a little sooner than stock.
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