Turbo surge
#1
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Turbo surge
When my turbo is coming on boost in 4,5,6th, around 3/4k it starts to chuff like a train, stops after bout 4k.
Bin told by mapper its turbo surge.
What causes this and how to stop it without having map altered.
Any help, thanks
Bin told by mapper its turbo surge.
What causes this and how to stop it without having map altered.
Any help, thanks
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Car is a 53 STI,
2.1 stroker
MD321T
650cc
RCM pump
GT spec tubular headers and up pipe
Fmic
Silicone intake pipe with alloy tube inside to stop it collapsing.
3" full decat
3 bar map sensor
Simtek
CAIK in wing
Was told by mapper that a taper inlet to the turbo would help speed up the axial gas speed?
Would anyone like to explain that to me coz I don't no what that means.
Hope this helps.
2.1 stroker
MD321T
650cc
RCM pump
GT spec tubular headers and up pipe
Fmic
Silicone intake pipe with alloy tube inside to stop it collapsing.
3" full decat
3 bar map sensor
Simtek
CAIK in wing
Was told by mapper that a taper inlet to the turbo would help speed up the axial gas speed?
Would anyone like to explain that to me coz I don't no what that means.
Hope this helps.
#6
Ok its probably compressor surge, in which case the turbo is drawing in air faster than engine can spit it out so the charge systEm backs up on the turbo compressor, which in turn slows the compressor down allows the engine to catch up again, this happens over and over in a very short time frame until the air produced from the compressor can be managed by the engine and the surging stops, to cure it you need to reduce the internal diameter of your intake pipe to find the balance point of air in to exhaust out
Cheers Iain
Cheers Iain
Last edited by Big 'D'; 28 May 2012 at 11:42 PM. Reason: Spelling
#7
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I'm guessing this be made worse by changing the intake pipe from the oe to the silicone 1?
If I was to reduce the intake diameter to slow the air down to stop this surge, would it cause loss of power in the top range?
cheers
If I was to reduce the intake diameter to slow the air down to stop this surge, would it cause loss of power in the top range?
cheers
Last edited by ado; 29 May 2012 at 07:17 AM.
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#8
Cheers Iain
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Hi mate I had loads of this around 3-4 thou on light throttle acceleration asked jase at 52 what to do to cure it he alterd the map slightly I assume on the wastage duty I probably opens earlier hi didn't say really just my thought but it did cure it
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