davcohen
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Registered: 1st Nov 03
Location: North London
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quote:
Originally posted by Steve
200bhp will need big increases to boost
i would disagree with that, comparing it to the old isuzu lumps a touch more fuelling and about 3-4 psi more boost gave a good increase and these are lower powered engines
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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i mean big increases for the turbo size, to get 50bhp from the small standard turbo will be pushing it fairly hard
[Edited on 03-02-2008 by Steve]
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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50bhp increase on the vag k03s needs about 11psi increase
[Edited on 03-02-2008 by Steve]
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davcohen
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Registered: 1st Nov 03
Location: North London
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quote:
Originally posted by Steve
i mean big increases for the turbo size, to get 50bhp from the small standard turbo will be pushing it fairly hard
Im not expert but again from a standard Isuzu td 1.7 with no mods apart from fuelling and boost will see 82bhp > 105bhp+
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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yes im not disagreeing with you, im saying the tuning boxes dont alter boost so you wont get very far with them, certainly nothing even close to 50bhp increases
[Edited on 03-02-2008 by Steve]
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ARD1
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Registered: 4th May 04
Location: Notts
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vag are different to the common rail in vaux and bmw etc, i saw a 36bhp increase with a box from thornby motors on my engine and 48nm of torque
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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quote:
Originally posted by ARD1
vag are different to the common rail in vaux and bmw etc, i saw a 36bhp increase with a box from thornby motors on my engine and 48nm of torque
there is no difference in principle, big power comes from more boost, you cant get power from nowhere
yeah you can tweak with fueling and timing, but that wont give you anywhere near 50bhp
[Edited on 03-02-2008 by Steve]
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mk4_astra
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Registered: 15th Oct 03
Location: aylesbury,bucks
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my dad have one for the weekend as a test drive just like bjackso2x
the 150bhp cdti model goes well and revs rather nicely for a diesel, with the 18s in bjackso2x picture and sport mode on the car is very planted and handles well.
a wolloping amount of torque is on tap from something silly like 1900rpm, and the car did have abit of torque steer but nothing wild.
personally would be more tempted with the 200bhp petrol sri but the 150bhp diesel is a very good substitute
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MatG
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Registered: 26th Apr 02
Location: Birmingham UK
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Steve I will be careful in what I say but there are a lot of cars with these boxes that have been rolling roaded. At different RR days all over the country.
The engines are meant to be around 150BHP although some have come out higher as standard.
Results for the boxes are between 184 upto 200BHP.
So you can make up your own mind regarding them.
From a personal point of view I would prefer to have a remap and I will map the FR not put a box on. However there is a lot to be said for the boxes in terms of cost (£250 per unit) they can be transfered to other cars, removed for servicing (if car is under warrenty), or even sold on once you sell the car.
So they do have a fair few advantages its just wether or not you are happy with the increase in power and the possible effect it is having on the components its connected too.
[Edited on 03-02-2008 by MatG]
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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most rolling roads are worthless anyway, show me a printout from a respectable rolling road and i might change my mind
either that or show me that the dtuk boxes do alter boost, in which case its perfectly possible
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MatG
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Registered: 26th Apr 02
Location: Birmingham UK
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I am just stating the facts steve nothing more. 
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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nothing factual about rolling roads
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MatG
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Registered: 26th Apr 02
Location: Birmingham UK
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Steve you are hiding behind a statement that anyone can pull out of the bag.
Agreed nothing factual about rolling roads but when it comes down to it within the modified car market its how 95% of the owners will find out the power of thier cars.
I have nothing more to say on the matter I just giving you some information based on results not opinion.
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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i see no results, only your words, i want to see printouts dammit, and from reputable places otherwise the words are meaningless
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VegasPhil
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Registered: 16th Jan 05
Location: Fareham, Hants Drives: Octavia VRS
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Guy at work has a 1.7 CDTI Astra Sxi Estate. Awesome Car 
Corsa 2.0 16v Vegas - Sold
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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even better a printout before dtuk box and after dtuk box, on the same rr on the same day
ta
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Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
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quote:
Originally posted by Steve
even better a printout before dtuk box and after dtuk box, on the same rr on the same day
ta
Get over yourself mate  . I'm sure you're quite able to use the search facility on some of the more obvious Astra/diesel websites if you're that bothered.
"Willy waving" Facts and figures aside, I've read plenty of genuine reports where people have been "playing" in various Astra convoys to shows and events where people with mapped cars, and people with standard 200BHP petrol and even VXR's, where they've made comments as to the lack in performance differences between their own, and the 'boxed' cars.
[Edited on 03-02-2008 by Rob H]
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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look either the dtuk boxes alter boost, or 200bhp isnt happening, FACT
if they alter boost then fair enough, i was told they dont.
[Edited on 03-02-2008 by Steve]
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Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
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From what I recall, the only person to say they don't increase boost is you  .
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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im passing on information that came from someone else, i did have a quick browse on teh website and could see no mention of boost being increased.
also i know of other "tuning boxes" that definatly dont alter boost
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Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
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I can only imagine the ECU realises there's more fuel, and ups the boost to try and lean out the mixture. It's a pretty crude way of doing it, but if it works and the engine doesn't throw up any warning lights, most people probably assume "it's all ok".
I can share your doubts about it, but then i'm not a massive fan of increasing power by a thrid on an otherwise standard engine anyway...
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22B
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Registered: 9th Sep 04
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Didnt someone on here have one of these on their corsa C, and got a lot less then they expected when they had it rolling roaded?
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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that was jm_16v i think and yes he only got about 10bhp more
[Edited on 03-02-2008 by Steve]
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Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
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What did he get? If it's the 1.7CDTi engine, they're meant to get a gain of around 20 brake IIRC?
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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about 10bhp iirc and he has other mods, i also dont see why the 1.7 would get 20bhp and the 1.9 get over twice the hike
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