TURBO TIME ( NOW WITH 140.4 KW )

[Woo]

The turbo outlet is the source of the hot air.

As you know Sean, the harder the turbo works the higher the charge temp.

The IC effectively cools the charge making it more dense. This lowers the pressure \"seen\" on the outlet side of the IC.

Sure you always should measure the boost at the manifold (inlet) but to achieve the same sustained boost pressure with an IC will require the turbo to work harder.

This greater degree of work is translated directly as heat. Heat then has to be removed by the IC.

What I'm trying to explain is that an IC doesn't make air. It can only cool whats there. What I was originally saying was that if the air doesn't need to be cooled (ie. a single power run) there will be no loss of pressure so no decrease in charge volume.

PV=nRT and p=m/v explain it all.

Regards
Wòó

[glen73]

The turbo outlet is the source of the hot air.

As you know Sean, the harder the turbo works the higher the charge temp.

The IC effectively cools the charge making it more dense. This lowers the pressure "seen" on the outlet side of the IC.

Sure you always should measure the boost at the manifold (inlet) but to achieve the same sustained boost pressure with an IC will require the turbo to work harder.

This greater degree of work is translated directly as heat. Heat then has to be removed by the IC.

What I'm trying to explain is that an IC doesn't make air. It can only cool whats there. What I was originally saying was that if the air doesn't need to be cooled (ie. a single power run) there will be no loss of pressure so no decrease in charge volume.

PV=nRT and p=m/v explain it all.

Regards
Wòó

i think you might want to look for or start a thread called intercooled Vs non-intercooled. your sort of hijacking russell's thread.

PS i hope your wearing your seat-belt when traveling at 3kmph

[Woo]

from what i have read thats not a bad return without a IC.

your sort of hijacking russell's thread.

Ok I can see the logic there.

PS i hope your wearing your seat-belt when traveling at 3kmph

It's law in Vic to wear a seatbelt whilst travelling forward on a public road. So, yes, I am wearing my seatbelt when doing 3 kph. Unlike others that only travel backwards.

pffft

Wòó

[glen73]

dude are you normal!
why you so sensitive about everything!
I'm trying to keep this debate above the belt but you keep dropping little bitchy-boy comments all the time. whats up with you! are you a keyboard warrior or something.
i don't even understand your last reply!
man give it a rest

[Russellb]

Glen 2000km and the engine is not leaking a drop . That breather line you are talking about should be vented back to the turbo inlet ( just haven't got around to it )Like you i have been having too much fun driving
on the coments that WOO made an intercooler will always help to make power as the Air temp will be lower . JUST like SEAN said
Even on a single power run intake temps where getting near 70deg C
Glen I will Intercool at a later date but there are a lot of little things to move (the A/C line infront of the rad are a big prob)
WOO pull your head in and start your own thread

[Russellb]

Well after 10 000km the Ebay turbo was leaking So much oil that I Changed it last friday. I Upgraded from the T25 to the T28 Highflowed.
Boost is up from 7psi to 10 psi and intake temps are about the same.
Got a chance to run it on a Dyno today



And still with No FMIC

[Boags]

That is very nice power!

And I have to say... *flame suit on* - I agree with Woo re single power run figures without intercooler will be higher.

But that is a different topic! Great work Russellb!!

Boags

[Russellb]

Don't Worry Boags I wont Bite your Head Off
Was just in one of those mods That Day
\"Each to there own \"

[Sean]

Awesome results

[Casey]

Wow

Impressive Russ, I might have to think a bit harder about that Autronic.

I take it this was the \"peak\" run. As an academic exercise, it would be interesting to do multiple power runs in a short period (ie with no cool down time between runs) to see the effect of not having an intercooler and compare this to when you do ultimately fit one. I know the conditions won't be the same, but it should still give a reasonable idea - and indicate if the first power run is stronger/weaker/the same without an intercooler.

[Sean]

:shock: Wow

Impressive Russ, I might have to think a bit harder about that Autronic.

WIthout trying to start an ECU war, the peak power has little to do with ECU brand, they can pretty much all supply the same fuel and timing figures for peak power if tuned correctly.

THe great benefit in Austronic is teh host of additional features you can select/benefit from.

[timk]

Is that using my old turbo? Nice!

[Russellb]

Is that using my old turbo? Nice!

NOPE Was a Rebuild and Highflowed T28 from Ebay
The one I got of you is in Bits and the Rebuild Kit is on it way

Casey I could do that It would just be time and Money. I'll just se what happens when I fit the IC

[Russellb]

have you found boost coming on later with the T28? or any differences at all from the T25

The T28 starts to come on around 2500rpm and has uasable boost by 3000rpm
where the T25 came on at 1500rpm and had usable boost by 2200rpm
but the T25 was over at 5500 rpm
The T28 is easyer to drive with no Kick in the back. Just nice & smooth

[The Pupat]

:shock: Wow

Impressive Russ, I might have to think a bit harder about that Autronic.

I take it this was the "peak" run. As an academic exercise, it would be interesting to do multiple power runs in a short period (ie with no cool down time between runs) to see the effect of not having an intercooler and compare this to when you do ultimately fit one. I know the conditions won't be the same, but it should still give a reasonable idea - and indicate if the first power run is stronger/weaker/the same without an intercooler.

The need to intercool has little to do with heat soak. When you pressurise air you you increase the temperature of the air which means you decrease the density from what it could theoretically be if you were to just increase the pressure without increase the temperature. As such the heat soak from the turbo charger has little to do with the intake air temperature. You put the intercooler in to remove the heat from the intake air after it is pressurised to reclaim some of that lost density. The other one of course is that high intake temps can lead to detonation.