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AuthorTopic: 300tdi torque and bhp figures?  (Read 24483 times)

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Offline Magnum335

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300tdi torque and bhp figures?
« Reply #30 on: October 08, 2006, 22:53:28 »
This be my current...
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Offline Xtremeteam

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« Reply #31 on: October 08, 2006, 23:05:39 »
Quote from: "barnyfarmer"
This be my current...


GTTF & fit a proper one

the autometer reads in bar & psi right up to 30 psi in 2psi increments
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Offline Magnum335

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« Reply #32 on: October 08, 2006, 23:08:58 »
GTTF?????

I look on halfruds webby but nowt there... can you send a pic of yours?
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Offline Xtremeteam

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« Reply #33 on: October 08, 2006, 23:12:31 »
catch me on msn & if you can recive pics on ur mobby ill send u one over :wink:
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Offline drutt

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« Reply #34 on: October 09, 2006, 00:18:01 »
Quote from: "dew1911"
Chavs with Corsas... This topic.

Anyone see a difference :?


No chavs,  No Corsas ... I guess I do see a subtle difference,  and even if there isn't one, so what ?
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Offline Porny

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« Reply #35 on: October 09, 2006, 10:26:42 »
Tim boost gauges…

I've used the 2 bar ones in the past, not that bad (plus I can get them trade)... I've had some that were spot on in accuracy... and others that were miles off!

I actually spoke to the importers and they have no way of checking them!!

Autometer ones aren't bad (I think I can get them trade too!), but for quality the VDO ones are very nice!!! (but not cheap)

At the moment I just use industrial ones (from a local pneumatics dealer) - cheaper and accurate - but no back light and not that well damped.  But mine are not permanently installed, I just connect them up when I want – have a nice little aluminium mounting :wink:

I’ve also been playing around with decent regulators/bleed valve…  
IMHO easier to play with the boost with one of these, rather than shortening the actuator (especially on a 300Tdi!!!).  
The one I’m using at the moment is a nice bit of kit, and is spot on – no peaks etc etc.  Was running round at 17/18psi which goes quite well, but I need to adjust the fuelling to suit.  
Have also played with stopping waste gate creep (i.e. stopping the actuator moving until it sees 14psi – as standard, an actuator will start to move, thus opening the waste gate before this, so boost takes longer to build up to the pre set level) – in all honesty doesn’t make that much difference on a 300Tdi – is slightly better, but not a huge amount.

You can also allow it to temporary overboost….


A 1 bar gauge is not really enough, even as standard you will find most 300Tdi will overboost slightly (usually about 1.1bar)… really you need 1.5bar or 2 bar.



Ian
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Offline Magnum335

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« Reply #36 on: October 09, 2006, 10:52:08 »
Yup i've found out a 1 bar isnt enough!!!
I may just jump in and buy a VDO gauge..... At least they will blend in more. I dont really like the silver bezel on teh autometer ones, although they look good. Hmmmmmm...... decisions.....
Dont spose you can get the VDO's trade can you?
One of my mates has a dump valve fitted on his 200, i am of the belief this does nothing except change from the usual clatter clatter clatter clatter to clatter clatter whoosh clatter clatter whosh... Am i correct?
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Offline Magnum335

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« Reply #37 on: October 09, 2006, 10:54:39 »
GAAA teh vdo goes up to three bar!!! not required....
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Offline Porny

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« Reply #38 on: October 09, 2006, 11:03:21 »
Quote from: "barnyfarmer"
Yup i've found out a 1 bar isnt enough!!!
I may just jump in and buy a VDO gauge..... At least they will blend in more. I dont really like the silver bezel on teh autometer ones, although they look good. Hmmmmmm...... decisions.....
Dont spose you can get the VDO's trade can you?


Quote

One of my mates has a dump valve fitted on his 200, i am of the belief this does nothing except change from the usual clatter clatter clatter clatter to clatter clatter whoosh clatter clatter whosh... Am i correct?


That was 'my' exact description posted in another thread!!!....  :wink:
On a petrol yes, on a diesel no point IMHO.

Looking (again) at VDO one, looks the nicest, but not very well laid out, more a quide than an accurate measurement.

The nomad one ones are quite nice:
http://www.nomadracing.co.uk/gauges.html#

Or for bling:
http://www.turbobits.co.uk/acatalog/digital_turbo_boost_pressure_gauge.html

No sure what I can get trade at moment... I know I can't get VDO ones...
But as you say 3 bar is a bit much..

Is a shame that nobody does a diesel specific one - as you do not need the minus numbers - you will never see a vacuum on a diesel!!!


Ian
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Offline Magnum335

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« Reply #39 on: October 09, 2006, 11:04:53 »
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Offline Porny

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« Reply #40 on: October 09, 2006, 11:08:14 »
Quote from: "barnyfarmer"
What about thisun?
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270037040132&fromMakeTrack=true


Doesn't look that bad, doesn't mention a size though...  I can measure how accurate it is for you for a beer  :wink:
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Offline Magnum335

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« Reply #41 on: October 09, 2006, 11:09:07 »
That digi one is nice, but i dont like its price....
Apologies, i didnt realise you had copywrited it!  :wink:

I like that nissan one, it looks like it will blend in with the landy dash, not quite as fly as any of teh others, but i want functionality as oposed to being opaque when the ig is off!!! Dont spose you approve....  :wink:
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Offline Porny

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« Reply #42 on: October 09, 2006, 11:11:02 »
Quote from: "barnyfarmer"
That digi one is nice, but i dont like its price....
Apologies, i didnt realise you had copywrited it!  :wink:

I like that nissan one, it looks like it will blend in with the landy dash, not quite as fly as any of teh others, but i want functionality as oposed to being opaque when the ig is off!!! Dont spose you approve....  :wink:


 :wink:

Not a Nissan one, just a key word in the title  :wink:

Racetech gauges are nice too, and not that badly priced.

http://www.demon-tweeks.co.uk/products/ProductDetail.asp?cls=MSPORT&pcode=R/PB2.5BL  (probably cheaper elsewhere)


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Offline Magnum335

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« Reply #43 on: October 09, 2006, 11:12:54 »
It must be a 52mm..... Exactly how far away are you from me lol?
I might go for that nissan one i think....
VDO is the only one that doesnt do -ve. Can you get -ve pressure if you tap straight into the manifold?
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Offline Magnum335

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« Reply #44 on: October 09, 2006, 11:14:55 »
Quote
As the gauge is mechanical, all fittings, pipelines etc are supplied separately.

[Edited] is that about?

Shall i go for the EQUUS one? and see what its like? You have not approved it yet lol!!!

It had better not rattle like my TIM one atm...
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Offline Magnum335

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« Reply #45 on: October 09, 2006, 11:19:35 »
Quote
Yes these are a 52mm gauge
Thanks


52mm it is then!
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Offline Porny

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« Reply #46 on: October 09, 2006, 11:34:17 »
Quote from: "barnyfarmer"
It must be a 52mm..... Exactly how far away are you from me lol?


Depends where you are  :wink: .... I'm near Junc 9 of the M42.

Quote from: "barnyfarmer"

I might go for that nissan one i think....
VDO is the only one that doesnt do -ve. Can you get -ve pressure if you tap straight into the manifold?


Nope, you will never, ever get a vacuum on a diesel (excluding some early Series 3's before we get someone being clever - but we'll exclude them for the time being)....

A quick explanation (sorry if this is really basic)

You won't get a vacuum on a diesel because you do not have a throttle blade,

On a petrol engine, the vacuum is created when you shut the throttle (i.e. lift of the accelerator pedal) as the engine is still trying to suck in air, but as the throttle blade is closed, there is only a small amount of air available.  The engine is basically trying to get more air than is available so creates a vacuum in the inlet manifold.

A diesel though, does not have a throttle blade – a diesel basically runs WOT [Wide Open Throttle] all the time and all the accelerator pedal does is add or remove diesel.

So you will not see a vacuum even in the inlet manifold, as it can not physically create one.  Hence why you have a vacuum pump on the side of the engine to supply a vacuum to the brake servo.


In terms of dump valves:
A dump valve is mainly used with high boost applications, the back pressure caused by lifting off the accelerator can cause the compressor within the turbo to stall. In extreme cases, the compressor can actually shatter.

This back pressure occurs because when you lift off the accelerator, the throttle blade closes... and as the turbo is still producing boost pressure this pressure builds up behind the turbo has no where to go - which as mentioned - in extreme cases can cause the compressor wheel within the turbo to go bang!!! - not good.
 
The dump valve is simply a release for this pressure... which also reduces turbo lag as the turbo is pressuring into a now empty intake manifold - which will also have a slight depression/vacuum acting on it.
 
A diesel though, does not have a throttle blade and as such will never see this build up of 'back' pressure.... (as mentioned a diesel basically runs WOT all the time and all the accelerator pedal does is add or remove diesel - in simple terms)

Which also means connecting a dump valve to a diesel is a little more complicated.  Because it doesn't have a throttle blade, there is no-where to tap into to connect the dump valve - which relies on the pressure difference before and after the throttle blade to work.
 
The only vacuum created on a diesel is for the brake servo.... a diesel dump valve gets plumbed in to the vacuum circuit and is controlled by a solenoid valve that is activated when you lift off the accelerator pedal. However.... this set up will work ok on a 200Tdi or 300Tdi but is not really ideal for a TD5.

Whilst a dump valve can be made to work on a diesel, the only benefit would be that of noise.  

Unlike a petrol, you will see no reduction in turbo lag, or turbo lifespan.... the biggest killer of turbo is not allowing them to warm up or cool correctly - i.e. thrashing the car from cold or turning it straight off after a high speed thrash.  Worst still is when people rev the engine and then turn it straight off.



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Offline Magnum335

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« Reply #47 on: October 09, 2006, 11:39:57 »
You are a very wise and knowledgable man.
Cheers for taking the time to explain it all to me.
Well the Equus is ordered so will see what it is like when it turns up! It has to be an improvement on my rattley tin can of a guage i have at the moment! And will hopefully blend in a bit better, though the TIM was not to bad.
I am near junction23a of M1. i have no idea where that is in ralation to M42 as i am not from round here!!!
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Offline Porny

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« Reply #48 on: October 09, 2006, 11:49:52 »
Quote from: "barnyfarmer"
You are a very wise and knowledgable man.
Cheers for taking the time to explain it all to me.
Well the Equus is ordered so will see what it is like when it turns up! It has to be an improvement on my rattley tin can of a guage i have at the moment! And will hopefully blend in a bit better, though the TIM was not to bad.
I am near junction23a of M1. i have no idea where that is in ralation to M42 as i am not from round here!!!


No probs....
I do sort of mess with engines for a living.... :wink:

Junc 23a of the M1 is the Junction with the A42 (which is end of the M42) so you are about 30 mins from me (my brother lives at Long Eaton - Junc 25 of the M1) and that takes about 40/45mins from mine.

If you ever need a hand with anything give me a shout.


Ian
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Offline Range Rover Blues

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« Reply #49 on: October 10, 2006, 02:39:29 »
I just watched the vid and I think that sounds sweet, who said chav? no comparison.
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Offline Range Rover Blues

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« Reply #50 on: October 10, 2006, 02:43:06 »
BTW, everything Ian said above is very true :wink:

With the possible exeption that very modern diesels now have a throttle flap, Transit I know for one.  Don't ask me why unless it's clean air act rubbish.
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