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Too much boost?

Ash

By Ash,
in Engines & Forced Induction

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Ash Grand Master

Ash

Posted
Posted

Hi,

i have a pod filter, CAI, BOV and turbo back exhaust, at the moment my EBC is set to 8.7 psi low boost and 11.6psi high boost, my question is, is this too much boost for stock turbo and stock intercooler?

i dont want to blow my turbo as i can not afford a new one, and it will be some time until i can afford a FMIC.

when i searched people were saying the most they would run is 9psi and others were saying 1bar. thats a huge difference. also some people had FMIC's and others didn't etc...

Thanks!

Ash.

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B-Man Grand Master

B-Man

Posted
Posted

Ash - buy my GTR FMIC off me - good deal for you bro ! Then you can run 12PSI no probes cuz !

I wouldn't run more then 10 PSI with stock cooler -

Put a thermocouple on youe plenum see what sort of temps you are running - anything over 40-42 deg and I would be turning down the boost !

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Kinks Grand Master

Kinks

Posted
Posted

Plenums are always hot from the engine tho??

I just threw a little temp sensor into the 31 and have the sensor tucked into a join between the crossover pipe and metal piping to the FMIC. Should give decent readings from there, will have to see what results I get tomorrow.. :P

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B-Man Grand Master

B-Man

Posted
Posted

Geoff,

I've just put a temp sensor on top of my plenum at the front - I think it is a good 'indication' of what is happening. Eg When driving , intercooler is working and temp sensor reads between 35-38 deg (when is what I expected) - At idle heatsoak sets and temp goes up to 45 deg. Start driving and temp goes back down.

My new cooler goes on today, so I should see a decent step down from 38 deg

It's really just a backyard test - but it seems to work OK.

Of course you could get more techncial about it - but for the $20 from Jaycar and the 5 mins it took to install - I'm happy !

Cheers,

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Merli Grand Master

Merli

Posted
Posted

Brendan, that would be eleventy billion times more useful if you actually put the thermocouple INSIDE the plenum or just before the throttle body and measure the temperature of the intake air?

That would be a much better indication of whether or not your intercooler is doing a sufficient job, and comparisons can be made with ambient air temperature to see exactly how much above ambient you're feeding your engine!

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Kinks Grand Master

Kinks

Posted
Posted

It would be more accurate and I considered it, but it's easier to strap something on the outside of a piece that changes temperature to get a rough idea, than it is to get a probe into the actual airstream. You then have to worry about sealing the hole properly and making sure nothing can drop off into the engine... and a 10 minute install where nothing can go wrong is easier!! :P

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B-Man Grand Master

B-Man

Posted
Posted

I agree Andrew, but like I said - it's a quick and dirty job - and you know what - it's better than nothing - which is what I had before.

I think you would find that there are only a couple of degrees in it - the biggest difference would be the time taken to register the correct temp - ie might take 30 secs or a minute for the external thermocuple to catch up - if you get my drift.

Anyway - another B-Man's backyard barometer :P ha ha ha

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