Ive got a wee polo sdi same as fabia. Amd want to know if anyone has used 1 of the tuning boxs on ebay to give a couple of bhp extra

Tbh all you can is tweak fueling.

And you'll get around 15 bhp tops, because you don't have a turbo and an sdi block is quite a bit different than a tdi.

Upto you if you think x pounds is worth 15bhp

Remaps advertise at around 80bhp. No reason why a tuning box won't give the same.

I know its not worth throwing money at for extra power and best way is to get rid and get a tdi. But the tuning boxs are around 44quid.. So if i got a wee bit more im sure its worth the cash. I think all they really do is trick it into throwing more fuel in.

I'd say a 15bhp increase from a £44 tuning box is very optimistic on a SDI.

 

Have you considered a performance air filter instead?    

Edited 12 July, 201312 yr by booke23

As said before, an sdi is pretty flat and will be even with a tuning box mate. I got a digital box installed on my tdi and the difference is great, easily above 20bhp, i would actually risk saying it's got about the same sort of grunt as a vRS now but without the looks. It is a true sleeper now, i haven't maxed it since i installed the box yet but i can now easily pass a lorry touching 110 whereas before i'd do that at around 90, the acceleration between gears is very, very strong now. And all that without the traditional black smoke of remapped diesels. But that is a digital box, a bit more expensive at 75 quid but a world apart from the resistor type ones that make your ecu readings go nuts.
 

A tdi will cost you less than a grand nowadays and providing the front suspension is fighting fit and the power steering is smooth, you should be alright.

I can't understand why someone would buy an SDI and then

try and make it faster? That's not what they are for.

We had one for nearly 5 years and we left ours alone.

But if you must go down the tuning box route

(if I was going to do it I'd have to have it remapped personally)

then get a pd130 intake on there (under £20 from the dealer)

and a free flow airfilter (30-40quid) and give yourself the best

chance of some noticeable gains.

It is a true sleeper now, i haven't maxed it since i installed the box yet but i can now easily pass a lorry touching 110 whereas before i'd do that at around 90, the acceleration between gears is very, very strong now.

So what speed do you pass cars at?

I tried one of these and couldn't get a discernible increase in power at any setting. sent it back and got my money back.

have a look on here re cheap ebay tuning boxes

 

they are basically a resistor that fools the ECU into thinking the air temp is lower so giving more fuel

 

£40+ for a box with a resistor in and a couple of plugs

 

not worth it,

 

look at one of the proper tuning boxes from a proper (not fleabay) dealer set you back more money but you will get a proper guarantee and more feed back on here

Sdi engines need more air before they can use more fuel. Fit a turbo out complete tdi engine.

Not true. Standard AFR is probably pretty lean so will have room for more fuel before it smokes.

Wouldn't bother with intakes or filters. 1 standards probably good enough and 2 they don't alter fueling.

Ecu tweaking be it remap or tuning box is the best way. For a tuning box you want one that intercepts the fueling request to the injectors. Not the one that plugs into the fuel temp sensor.

I can't understand why someone would buy an SDI and then

try and make it faster? That's not what they are for.

We had one for nearly 5 years and we left ours alone.

But if you must go down the tuning box route

(if I was going to do it I'd have to have it remapped personally)

then get a pd130 intake on there (under £20 from the dealer)

and a free flow airfilter (30-40quid) and give yourself the best

chance of some noticeable gains.

im not trying to make it much faster.. Ive a mk1 octy vrs and a mk4 golf 1.8t aswell. But if 44quid gives it a wee bit more power then i wouldnt mind getting 1. If i wanted the sdi alot faster i would stick an 1.8t in it of a tdi lump

I tried one of these and couldn't get a discernible increase in power at any setting. sent it back and got my money back.

dont think ill bother then. Cheers for tge info

+15 bhp on on N/a Diesel engine? I think they're pulling your leg there mate, petrol a struggle to see +10bhp after a remap. I don't think there is any point at all in tuning an n/a engine unless it has the likes of a vtec, carbs or throttle bodies.

So what speed do you pass cars at?

To overtake a 60mph car i don't even need 3rd, down to 4th and i'm well through, if i have enough road i don't even bother with the gears tbh. The acceleration is much better now. With lorries i don't take risks, always down to 3rd and foot to the floor.

Not true. Standard AFR is probably pretty lean so will have room for more fuel before it smokes.

Wouldn't bother with intakes or filters. 1 standards probably good enough and 2 they don't alter fueling.

Ecu tweaking be it remap or tuning box is the best way. For a tuning box you want one that intercepts the fueling request to the injectors. Not the one that plugs into the fuel temp sensor.

If Vw could have added more fuel to get more power, you can bet they would have.

Sdi is already on the smoke limit.

If Vw could have added more fuel to get more power, you can bet they would have.

Sdi is already on the smoke limit.

 

...Which is "tree-hugger low"... If you'll pardon the expression. Unless he makes it smoke like a full bus on a hot day or a diesel dragster there is some wriggle room.

 

Personally, I feel best results would come if pumping losses were to be minimised. A big inlet pipe to a big (standard paper filter from an S2000 maybe) and a freeflowing exhaust would probably help as much as a remap. And if DIY'd wouldn't cost much different.

 

For us luddites that won't learn foriegn (muck).

http://translate.google.co.uk/translate?hl=en&sl=fr&u=http://golfoo.net/forum/viewtopic.php%3Ft%3D133261&prev=/search%3Fq%3Dhttp://www.golfoo.net/forum/viewtopic.php%253Ft%253D133261%2526postdays%253D0%2526postorder%253Dasc%2526start%253D0%26client%3Dfirefox-a%26hs%3DPZO%26rls%3Dorg.mozilla:en-GB:official%26channel%3Drcs%26biw%3D1280%26bih%3D833

 

 

J.

Hmm my original statement is still true

Hmm my original statement is still true

 

Tbh all you can is tweak fueling.

And you'll get around 15 bhp tops

 

I still say 15 bhp increase from fuel tweaking alone is very optimistic. 

Log group 3 in VCDS and ill tell you if theirs room for more fuel

I still say 15 bhp increase from fuel tweaking alone is very optimistic. 

 

Indeed.

 

To gain 15hp would be ~23%.  There is not enough air to burn 23% more fuel.

 

If the stock A/F ratio is around 20:1, then going to 18:1 would only deliver 10% (6hp)  non turbo diesels do not burn as cleanly as turbo diesels, you can't run 17:1 and expect anything but a smoke cloud.

Intake/exhaust mods will be good for maybe a few percent max, it's really a complete waste of money.

 

Vindaloo, do you not prefer to breathe clean air?

 can now easily pass a lorry touching 110 whereas before i'd do that at around 90

 

But trucks are limited to 56, what in under god are you doing that speed for? Are they 300ft long?

 

To overtake a 60mph car i don't even need 3rd, down to 4th and i'm well through, if i have enough road i don't even bother with the gears tbh. The acceleration is much better now. With lorries i don't take risks, always down to 3rd and foot to the floor.

 

Sounds a bit rash. Try timing your approach more. 

But trucks are limited to 56, what in under god are you doing that speed for? Are they 300ft long?

 

 

Sounds a bit rash. Try timing your approach more.

 

 

On the A421 between MK and Bicester there isn't a lot of places where you can overtake so you have to take every oportunity you have, also you can't see a lot past the lorries so you have to keep a good 10 metres so you can see clearly in front. It's one of those things... using the aproach momentum  to pull out only really works if you can see well past the lorry. That was the no.1 reason behind the box install, the extra capacity between gears are definitely a safe bet.

i know i don't need to floor it like that but i play safe and at the same time i enjoy the speed this little Fabia offers. On a clear dry run i normally do that strech of road above 90 anyway, it's a nice bit of road, law activity is very low and you don't really need to slow down until you get to the 2 or 3 side roads that there is there, in those places i slow down to about 70. I'll tell you, i have been overtaken when doing 90+ by loads of motorbikes and once by an Aston, the guy probably needed a poo.......

I was considering a box for the Furby VRS Mk1 until my good friend a Skoda technichian who stated the following.

 

"For £80ish you could end up with over £4k of damage!" To which I was gobsmacked (to say the least)!!!!

 

They and other tech's across the UK have had PD and CR engines in recently after these boxes have been fitted causing non starts, misfires and cutouts. All with the owners stating "I've not done anything new to it, honest."

 

What happens is the injectors or PD injectors get over fulled causing all manner of problems. And especially on the PD enigine as the injectorn is a mini fuel pump (I got lost at this point) they push nearly £800 plus VAT to replace including labor. Can also cause ignition issues in the cobustion chamber.

 

(Apologies for crap spelling and grammer tying o type this quick before the boss returns)