Intercooler

[PSI40L]

Ona hot day yes my car runs worse this is very common in turbos even normally aspirated cars feel the pinch. I was looking at my barra the other day and I noticed a temperature sender switch on the inlet to the intercooler for that to be there the computer must know exactly whats going on . the switch sends the correct temp to the ecu and it inturn if it is too hot retard the timing in the motor just to be safe. a bigger intercooler preferably aluminium in design will do the trick and a spacer on that temp sender might bypass it I reckon easy 30kw with a bigger intercooler the ecu only recognises temp

but the intercooler increases the mass of cold air going to the motor yes it will work...

[CJF077]

You planning on changing the intercooler PSI40L?

[PSI40L]

Not just yet cj im not gonna touch the car for the first year just to do a bit more research. Eventually ill do exhaust ,intercooler ,bov,and boost controller which I have ordered I did put a boost gauge in there but didnt mount it,just to see what the turbo was doing interesting enough the turbo reaches 6psi at 3500rpm and maintains to5200rpm no wonder it makes such a good torque curve . Took it out though dont want to wreck interior im quite happy for the moment but I know sooner or later I will be spending money on it.....

Edited 08/01/03 12:13 PM by richdave

[Guest EADan]

The intercooler sits between the turbo and the inlet manifold right?? Wouldn't putting in a larger intercooler mean that the turbo has to compress more air, adding lag and robbing power??

[richdave]

The intercooler sits between the turbo and the inlet manifold right?? Wouldn't putting in a larger intercooler mean that the turbo has to compress more air, adding lag and robbing power??

Correct as far as plumbing, and lag, not so about robbing power...Increase in air charge would increase power as long as the air/fuel mix ratio was still maintained.... Hmm have I learned something from loitering in this forum

I got this from JWT Technology

Increasing intercooler size

Advantage

Reduces air temperature to increase threshold of detonation. Increases air charge density, delivering more oxygen per stroke. Also less pressure drop across intercooler.

Disadvantage

Slight lag increase due to larger volume.

And I got this pic from www.howstuffworks - turbos

Edited 08/01/03 12:54 PM by richdave

[Guest driftin]

This is why people run cold air intakes, to get the outside air unaffected by heat from the engine.

There is big gains to be had (particularlly on a forced induction engine) of getting the car to breath as efficiently as possible.

Cold air intake, hi-flo filter, possible changes to airbox and MAF (Mass airflow meter) exhaust manifold, hi-flo cat, exhaust and muffler etc etc.

This is what I'm thinking about. *Love* the way the car pulls on a cold evening and it would be nice to have that kind of responsiveness 24/7.

I'm beginning to get the feeling that the EMS definitely doesn't limit torque to 450NM...

You're right, it doesn't -- it's another baseless rumour.

How exactly would an ECU "limit torque" in any case? It implies some sort of closed

loop where torque is measured and then measures are taken to reduce it.

Obviously, this is not possible.

Adam

[richdave]

How exactly would an ECU "limit torque" in any case? It implies some sort of closed

loop where torque is measured and then measures are taken to reduce it.

Obviously, this is not possible.

Not wanting to be argumetative here, but rather play the devils advocate...

Surely the ECU "knows" what is happening at any given time, air/fuel mix, temp, boost, rpms etc. Could the ecu have some sort of maxrix or map emmbedded in its memory that would give it at least an aproximate power value for any given set of variables (or at least a sub set depending on memory available), then use this to manage the tourque produced since:

Using the simplified formula

Kilowatts = (Torque x rpm) / 9549

or transposed

Torque = (Kilowatts x 9549)/rpm

Just one mans thoughts.....

[Mals BA XR6T]

Somebody said that boost was set at 6 psi from 3500rpm to something like 5200??? This would hold torque at 450 wouldn't it??? So I think if your able to get around the ecu to increase boost, torque would increase as a result.... but I know nothing about Turbo's, torgue, boost or ecu's.... actually I really have little knowledge about anything and am writing on this thread cause I'm wasting time at work, and waiting for lunch time :lol:

[xa-coupe]

well...

the T5 should handle the power unless you drive flat-stick for a while. you'll crunch it eventually. I know of a guy with a 5.7L (stroker) XR8 with something like 230rwkw and his standard 'box was coping quite well. however, I've hardly ever seen him drive flat-out.

If you are talking about AP then I have seen him cane it (ran 13.2 at calder ) and the T5 didn't grenade like so many people predicted.

I don't know how it would have held up in the long run though..

[Mondie]

l am no engine control expert but the only way that l can see that the ECU could limit torque would be electronically by using a series of formulas and inputs taken from various measurements made from the engine in real time. Torque could not be measured mechanically or we wouldnt need engine dyno's.

So if the ECU was to limit torque it would have to monitor what these formulas calculated and these results would then have to match into an equivalent torque output figure. Its hard to know how much detail Ford went to here, but CJF has already commented on how much more responsive and powerful his car feels with the new exhaust, so obviously exhaust outlet pressure is not one of the variables monitored. We need to know what variables the ECU does monitor in limiting torque (assuming it does) and then the modifications can be made on the variables the ECU isnt controlling without having to crack the ECU.