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if you drive a diesel car
then you probably use most of the advantages
a diesel engine can offer
if at some point you got a question
whether your diesel car can drive faster
in most cases the answer will be "Yes. Of coarse!"
if you try to figure out
what modifications you need to do
you'll be probably surprised
how little info you will find
in my particular case, I was quite happy
and I found a very nice web-site
and if you understand dutch
then you would be surprised
how much info can be found there
so, my story is started
one year ago I bought 1.9 TDI Seat Toledo
its on the back side here
it was 150hp from stock
and then I started to search around
at some point I found "JB autoservice"
who was mentioned by many people on dutch forums
as to be quite good in modifying diesel cars
my first question was: "Can I film?"
and I was surprised by the result
actually I managed to film almost every step
we did om my car
right now I'm trying to put it all together
in such a short way that it is informative
but also not boring
I hope you'll enjoy
I'll put some comments from Jos (JB autoservice)
om very important modifications
some part will be in dutch, but I'll translate it to english
I hope you will like it and enjoy it
and everybody will be happy... as I am
basically, with chip only one can go minimum to 180hp
this is the first modification
if one makes it custom, even 200hp is possible
further, mechanical modifications are needed
by means of turbo and SW one can go up to 215hp
further, with a different turbo, 230hp are reachable
and the next step is to modify
clutch, nozzles and again the turbo
in this way, one can reach 240-250hp
the ARL engine (150hp) has a good basis
it has very good gear box attached
good engine with a large inter cooler
so basic settings are already good
so only turbo, nozzles, clutch and SW has to be modified
in order to get a better result
there is no larger plug&play turbo for a 150hp engine
so, the turbo which will fit has to be made
we would like to have a turbo
which spools good at low rpm, but also deliver power at high rpm
and those are made in Finland
you have KR-25
it's a modified Finturbo, which is based on an original one
this means, it has different compressor wheel and housing
and a different turbine wheel
as a result, the turbo is much larger as it seems
one can get fuel into an engine in two ways
short injection through the large hole
or long injection through the small hole
long injection has consequences for the burning temperature
the longer the injection, the higher the temperature
the idea behind the large nozzle is
to inject a larger fuel amount in a shorter time interval
the larger Pumpe Duse (PD) nozzle is PP783 from Fratelli
and is ~50% larger then the largest original nozzle in ARL engine
the ARL engine is basically very strong one
as good as 130hp engine
a nice basis to gain high power
gear box and a power train can hold those high loads
dual mass flywheel and the clutch are in between and
find those loads less fine
also they can slip when the tuning is performed
in case of a heavy tuning
an advanced pressure plate kit becomes very important
we use SRE (Sachs Race Engineering) clutch
in order to go up to 500 Nm without a penalty
we have also a different useful set
which is easier to engage
and is good up to 220hp and 430-440Nm
with an SRE clutch the flywheel is a limiting part
the torque should be reduced
otherwise flywheel will start to vibrate
(question) > Which torque do you mean?
it varies from 430Nm to 520Nm
in your car we will mount
a set from KW (springs and shock absorbers)
to ensure some comfort
but also to deal with the power
which your car will have from now on
the same guilts for the brakes
you'll get Brembo brakes
the diameter of brake a disc is less important
wrt material discs and pads are made of
to ensure constant braking with no fading
in your case, we'll also replace lower control arm bushes
to ensure even more stability
[ music ]
completely not good is not what I'd say
in fact, this is already a quite extreme
to gain so much power from a small engine
so, there will always be some deviation from an ideal curve
if one checks each standard car
one will be shocked by what one will see
but one drives those cars
around 35% of diesel cars just have it
this is not bad, but if one wants to improve it
the 'dyno' test bench is the way to go
then it will be more optimal (flat)
however, it does not mean that it wasn't good
good power & torque came out
custom programming will reduce variation
within certain acceptable margins
one can inject more fuel to make curve look better
but then lots of exhaust smoke will be generated
therefore one needs to compromise
its not like, one asks for power & mechanics gives it
one has to take into account
different pressures, temperatures and fuel quantities
its too simple to say
program it and mechanics will do it precisely
this setup looks good
yes, in a third gear
in the fourth it became too warm
on the high way one gets probably more wind
in the third gear we just measure around 250hp
this setup is very good
in principle, one asks something
and measures the response
one can ask so much, but one won't get it
and at some point
there will be enormous smoke development
and other strange things
in addition, if one asks too much
one will start to get resonances
and the car will not run fine
the curve will look good, but won't drive fine
we make curve look good
and the car feels good on the way
... and does not break down...
here it smokes always more then on a highway
in principle, for this power, it's not a lot
if you want to drive without a smoke
you could better buy a petrol car
I mean to drive a standard diesel car
but if one wants to get 230+ hp
from a 4-cylinder diesel engine
totally smoke less - is an illusion
and I always tell this
it's almost impossible
I find this setup practically not smoking
for a diesel with this power
[Jos]: it is ready now
[Jos]: have lots of fun with it
[Roman]: thanks a lot
[Jos]: nice, push the gas down