Ins and outs of a Turbo and its performance?

[Tony2Quick4u]

Hi all

well from time to time i have read about the whole workings and goings on with a Turbo but never paid that much attention as i have always owned a car in which the engine has been naturally aspirated.

well i thought i would read up on and learn about turbo aspirated engines engines and what they have to offer!

Just need you guys to explain to me the logistics of one

How does chipping on a turbo work, does it just get the turbo to hold the boost for longer and of course throws in more fuel/air etc? this is my understanding.

Induction kits on turbo's, i presume the fully sealed ones are the best like the dynatwist or viper kits unlike the open K&N cone shape filters? can you get these makes for the RS

also i understand with my car it is not always best to have the biggest exhaust as you need a certain amount of compression to make it pick up from low revs, is this the same for turbo engines, like is the bigger the exhasut the better as then more air can free flow through the turbo>engine much quicker.

charge cooler, how does this work (keeps the engine cooler)? and I have seen something about water spray, i take it this works by spraying cold water onto the chargecooler so the air flowing through it cools very quickly keeping the turbo cooler and allowing it to keep its boost and lower temps offer better performance as well?

what else can be done to turbo aspirated engines performace wise?

cheers guys

:D ;) :p :cheers:

[Saul]

Originally posted by Tony2Quick4u
Hi all

well from time to time i have read about the whole workings and goings on with a Turbo but never paid that much attention as i have always owned a car in which the engine has been naturally aspirated.

well i thought i would read up on and learn about turbo aspirated engines engines and what they have to offer!

Just need you guys to explain to me the logistics of one

How does chipping on a turbo work, does it just get the turbo to hold the boost for longer and of course throws in more fuel/air etc? this is my understanding.

Induction kits on turbo's, i presume the fully sealed ones are the best like the dynatwist or viper kits unlike the open K&N cone shape filters? can you get these makes for the RS

also i understand with my car it is not always best to have the biggest exhaust as you need a certain amount of compression to make it pick up from low revs, is this the same for turbo engines, like is the bigger the exhasut the better as then more air can free flow through the turbo>engine much quicker.

charge cooler, how does this work (keeps the engine cooler)? and I have seen something about water spray, i take it this works by spraying cold water onto the chargecooler so the air flowing through it cools very quickly keeping the turbo cooler and allowing it to keep its boost and lower temps offer better performance as well?

what else can be done to turbo aspirated engines performace wise?

cheers guys

:D ;) :p :cheers:

"Chipping" varies from engine to engine, but with the RS turbo (CVH engine i think) its a very simplistic design compared to the 20VT VAG units. Bleed valves can be used for example, along with different wastegates/actuators to alter the boost controls on the engine.

However, really you want to have the fuel to match, which primarily is where "chipping" is required so the fuel is delivered where required (although this theory alters on cars fed via a carburettor as opposed to fuel injection)

Exhausts, most companies will test an exhaust for effiency and performance, an overly large exhaust will cause a drop off in torque as the gas is expelled to quickly to offer any kind of back pressure (although technically back pressure doesnt exist in physics). A good free flowing (as gas speed is good) exhaust is your best bet, find a reputable exhaust that has had good reports and more importantly, backed up by performance gains.

I wouldnt of thought the older Ford Turbo engines suffer from temperamental MAF sensors like the 20VT's, so K&N/Pipercross/Green et al filters would work, so long as they are fed COLD AIR!!!!


A charge cooler works by having water reduce the temperature of the air going into the cylinder via a radiator, giving you an better mixture, intercoolers work by air/air and are in some cases easier to fit and work with than a charge cooler.
Sparying water onto a charge cooler doesnt work, spraying water onto an intercooler does as it increases evaporation thus lowering temps.

No doubt more will chip in with their own views.

:cheers:

[Tony2Quick4u]

Originally posted by Saul
"Chipping" varies from engine to engine, but with the RS turbo (CVH engine i think) its a very simplistic design compared to the 20VT VAG units. Bleed valves can be used for example, along with different wastegates/actuators to alter the boost controls on the engine.

However, really you want to have the fuel to match, which primarily is where "chipping" is required so the fuel is delivered where required (although this theory alters on cars fed via a carburettor as opposed to fuel injection)

Exhausts, most companies will test an exhaust for effiency and performance, an overly large exhaust will cause a drop off in torque as the gas is expelled to quickly to offer any kind of back pressure (although technically back pressure doesnt exist in physics). A good free flowing (as gas speed is good) exhaust is your best bet, find a reputable exhaust that has had good reports and more importantly, backed up by performance gains.

I wouldnt of thought the older Ford Turbo engines suffer from temperamental MAF sensors like the 20VT's, so K&N/Pipercross/Green et al filters would work, so long as they are fed COLD AIR!!!!


A charge cooler works by having water reduce the temperature of the air going into the cylinder via a radiator, giving you an better mixture, intercoolers work by air/air and are in some cases easier to fit and work with than a charge cooler.
Sparying water onto a charge cooler doesnt work, spraying water onto an intercooler does as it increases evaporation thus lowering temps.

No doubt more will chip in with their own views.

:cheers:

Thx Saul excellent start

so is buying an intercooler a better option as it can be teamed up with a water spray device and enabling cooler air drawn into the engine than a chargecooler?

I take it does not matter to much which induction kit (well as long as its a good make with a good reputation and reported performance gains) because the RS's dont have such complicated things like as you said "MAF" sensors?

thx for all the advice, pretty new to this tuning scene

i hear the Bajoo chip is the most popular for the RS's

what is the way bill went, like i mean in order of modifying his turbo and handling etc?

like suspension
brakes
intercooler
chip
etc
etc

I know suspension is the best way to start as the RS's suffer torque steer like the Focus RS does

but then what is the best order fo things to get the engine done in?

i presume the chip is last as it will be a custom re-map if things like the intercooler, turbo, dump valve etc are all put on?



:cheers: