pslewis

Some people will ALWAYS **** themselves and will follow like sheep .... thats up to them - but I feel a strong urge to put the 'common sense' angle on these things!

We now have Intercooler Heatsink ... another SN Myth in the making

I've never seen such a lot of ****e talked about a car as on here, its the same when any group of people with ONE interest get together .... all of a sudden people are taking notice of the drivel they are spouting and its self fulfilling - they start to feel that they are experts in the particular subject

On ScoobyNet we have all sorts to whom Engineering is a no-go area, I have a mate who is a Banker ........ if you told him that the Headlamp Fluid needs to be replaced then he would take it to the garage and ask for it to be done!! .......... these people are led astray by the 'so called' experts

People who blow engines simply cannot drive properly!! Nowt to do with poor petrol, pinking, InterCooler Heatsinking, wrong Oil Change procedure

These people would destroy ANY engine

Pete

pslewis

But, by all means, buy your knocklink if you feel safer with it ...... to me, it is simply a few coloured LEDs that light up in response to the output of a knock sensor!

Which is all it is of course!

Pete

David MY99

Pete, did you ever thought about the issue that the knocklink is way more sensitive then the oem one?
I have an knocklink on my modified car and a link ECU.
The Link uses the oem knock sensor and this can't seem to hear the difference between engine noise or det with an aftermarket exhaust manifold.
I've mapped my car with a detcan, knocklink and the oem one and guess what?:
The oem one gives the same amount of knock above 5500 rpm and doesn't know the difference, the knocklink on the most sensitive position shows some det at 7000rpm untill 7500 rpm, the detcan stays quiet.
Now i've retarded the timing and the oem one doesn't see any difference above the 5500 rpm, the knocklink reacts the same as before but give's no det between 7000-7500 rpm, detcan still quiet as before.

Finaly i've adjusted the sensitivity off the knocklink to match the detcan, advanced the ignition until i got the first orange led to burn, if the knocklink give's more then 2 orange one's or even flash the red i'm possitive it's det, but the oem still don't know the difference. IMHO is the oem one perfect on a standard car and the ECU will manage, as soon as you search for the limits of a car it's good value for your money, and way more sensitive then the oem one.

Roojai

A few things to remember is that the ecu does not 'listen' to the standard sensor above 5000rpm, so pinking will not be detected here.

Intercooler heatSOAK, not heatSINK, is a well known phenomenon in turbo cars with small or poorly exposed intercoolers. It will increase charge temp and result in loss of power and/or detonation and possible melted pistons.

PSlewis, you keep contradicting yourself:


So you say the ECU responds and the engine does not pink. Then you say:

You also say:

and then you say:

so you are reacting faster than the ecu!??

One last thing:
I fitted a knocklink when I did modifications and found that my engine did detonate, I took action to fix the problem and it was reduced, I took further action and now detonation is no longer a problem. I would have had no idea if I didn't have my knocklink, and would not have fixed it. A friend with an almost identical car, doing the same mods at the same time, did not have a knocklink and he had to pay for an engine rebuild where I did not.

pslewis

David ..... I can see that the standard Knock Sensor might be confused by an Aftermarket Exhaust .. but only if the downpipe had been changed too??

The exhaust is noisier at the back of the car and a long way away from the Knock Sensor .... so not likely to affect it greatly.

Pete

pslewis

Hmmmmmmm, interesting to note that Subaru shut the ECUs ears just when damage will be done??!! Needless to say I am sceptical about that - could you please post some proof from a Subaru source??

Pete

Roojai

nah, I just made it up like you do.

David MY99

we're talking about an exhaust manifold like an "GTspec GenII" in my case.
I agree that is has nothing to do with the downpipe, that would make no sense at all

pslewis

I have seen it listed as a HeatSink problem, HeatSoak then ...

Now, let me get this straight ....... the Subaru Intercooler is too small and/or poorly exposed? So? Subaru have got that part of the design completely wrong too .... and in all these years they haven't addressed it???? Oh My God!! Or could it be that Subaru think its all complete and utter bollox?

Pete

pslewis

I see ............ and your qualifications to make up stuff are what?

Pete

pslewis

Right, so the manifold is changed - does this new manifold rattle against the block to confuse the Knock Sensor then?

Pete

David MY99

no but because off the different flow and sound it messes up the knocksensor..

Butt hey, you wan't to be the sceptic and it's your car so don't buy it

scooby-si

just like you pete and labour

pslewis

The standard Subaru Sensor must be very sensitive then??

I would have thought that was a good thing??

Pete

pslewis

I tell it as it is ..... and ..... it is as I tell it

Pete

scooby-si

pete ill buy you a charge temp gauge and we'll tap it in to your intercooler and watch the temp go up to 70 degrees when your sat there not moving ,and when you go over 110mph ish watch the temp go sky high again,but you will not notice this to much as your still standard

pslewis

I have no doubt that the temperature rises ..... its easy to realise that.

What is not so clear is why that should blow your engine up??

Should we only use our cars on winter mornings??

****ting myself now ... been driving in the heat of summer for a few years

Pete

scooby-si

on a standard car pete the air intake temp isnt such a problem,but when you start to get up to the 380+bhp area then it makes alot of differance,turbo will be running hotter so you need alot more cooling and the standard intercooler isnt much kop but the sti8 isnt to bad

scooby-si

shhh you will scare people m8

pslewis

Its only an issue if you actually USE those extra horses!!

If you drive sensibly, you should still be within the design limits of the car

If, however, you drive like a right wally then an engine in pieces is what you will experience

Pete

AlanPPP

iTrader: (2)

I think subaru still use the TMIC as pureley a cost issue pete..

FMIC's on all scoobs is gonna cost a damn site more and increases lag which ain't exactly somthing to advertise on a new car..Mind you the EVO has one soooooo

pete P1

dont want to sound out of line mr lewis,but i know everyone to their own and all that.but we are talking about subaru imprezas..one of if not the most famous rally car built.you say about driving them like lunatics and strangling the **** out of them or around those lines being the cause of them blowing up.but i think most people buy these rally bred beasts because they want to drive fast.im no lunatic on the road, but i didnt buy my beast to drive at a relaxed pace!!.i could have spent a lot less anbd bought a more economical cheaper to run focus or something.

jasonius

iTrader: (1)

How many miles you done Pete (now your cars out of warranty)..?

With regards to the IC, given it's purpose is to cool, where would the best place be to locate it..? Maybe on top of the hot engine, next to the HOT turbo and above the HOT downpipe where it's nice and cool..?

Don't get me wrong Pete, I'm all for your crusade to cut the BS on here, but it's time to pick another myth to dispell..!

Jason

pslewis

No, the KnockLink thing interests me immensley.

I have experienced pinking when using cheap Tesco NUL Petrol - I have adjusted the loading/engine speed to cure it .... now, I am an excellent driver and was taught to drive in a time when we didn't need lights and noises and laptops and whizzbang this and that to tell me what I can hear and what I can feel.

Now, if its all done to impress your impressionable teenage buddies then fair enough, but - noone who can drive properly needs all this crap!

One thing is puzzling me actually, why doesn't the ECU retard the ignition when I hear pinking? Maybe it really is slow to react? But electronics operate in Milliseconds, so - all I can say is that it takes a second or two to retard (taking it in steps maybe and monitoring the result?)

Pete

MaDaSS

I can say for a fact that in my MY03 WRX modified car, after a tank full of what was supposed to be Optimax, my car was ****e. It felt like it had no boost, no pull and **** all acceleration. I was well miffed as this was 2 days before a tek3 map!
Anyway, it turns out the fuel was ****, the ECU had trimmed back its timings so far it was not even boosting. I could not thrash the car even when i wanted too. I knew it felt **** so i told Richard before he mapped my car, and i got the full story when he told me how ****e it was from his laptop readings! My whole point being, the ECU did its job, i didnt need red led's to tell me, my engine was not b0rked! My car did not melt. My car after the remap and an ECU reset was fine. So i do have to agree there really is a lot of scaremongering going on with this KL malarky. If you want one, ace, get one. But we dont. Your choice, our choice we are all happy.

tath

no it can only pull the ignition back a few degrees - why do you think 95ron can melt pistons if it's infinite?

PALATINE

No your a ********!

pslewis

Could you point me to the information that backs this up?

I cannot see why there would be a limit?

The post above yours would indicate that the ECU would retard to such an extent that the car saves itself?

Look forward to the technical spec to verify it will only retard a limited amount.

Pete

pslewis

Thank you for your valuable contribution ....

Its the contribution one would normally expect from, well, ..
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A ******** - so your purile posts confuses me somewhat?

Pete

You have even spelt one of your FOUR words wrong .... so, an IDIOT and a ******** then??

PALATINE

know you're a ********

better?

ps Either my post confuses you or my posts confuse you, if you want to start being a Grammar ****