Megane R26 Wastegate Chatter

Blanking Plate and custom filter

Category:

People & Blogs

Tags:

• megane
• r26
• renault
• sport
• wastegate
• chatter
• compressor
• surge
• boost

[StuntedGrowth300]

a Wastegate Is Inside the turbo. The blanking plate removed the OEM dumpvalve

[jimbooboo]

my cousin now owns this car.

[StuntedGrowth300]

Nice, i had it from new, superb car never had a problem with it. Traded it in for an evo. Still miss her tho :-(

[StuntedGrowth300]

3 x Renault 5 GTT = 22 PSI

Megane R26 = 16 PSI

EVO 7 = 1.2 BAR

Im not saying BOV don't have a purpose im just saying from my experience on the cars ive owned and tuned myself it hasn't had any effect removing the BOV ( apart from the noise )

[importsc41886]

that's not the wastegate making that noise that is the BOV not adjusted right

[StuntedGrowth300]

Mate it hasnt got one fitted lol i removed the OEM item and fitted a blanking plate from forge. As for the comments about lag and my turbos going to explode lol ive never had a turbo go running this setup on any of my cars, all have been running higher boost.

All my cars have felt no different with or without a BOV fitted.

[rachitron]

only idiots refer to compressor surge as wastegate chatter

[danleary123]

hes exaclty right . boost ends up getting forced back down the inlet pipes hitting the turbine wheels as it has no where to go . it puts huge amounts of stress . that turbo will go beofre it ment to . maybe 6 months maybe 2 years but it will have an early death . this is why we have bov . bov sot money even cheap standrad ones so why would manufactorys waste their money if it wasnt needed

[marek0086]

When will u people learn?!?!.... this is just closed-throttle compressor surge!!!

[roflex2]

@danleary123 No the turbo will be fine, the BOV is for emissions and noise reasons. Turbo F1 cars, turbo rally cars, HR31 skylines, GT porsches, VL commodore turbos all run NO BOV and flutter all day long. I have a 200,000km old HR31 skyline that has no BOV, it still has the original turbo with no problems.

[blueprint45238]

@xripperx898 the exhaust continues to go through the turbo and out the exhaust, its the trapped compressed air from the inlet side that passes back through the compressor.

If there is no BOV, recirc etc as with the above car this is the only way for the compressed air to go when the throttle closes but yes as you say if there is a BOV it shouldn't make this noise.

[blueprint45238]

@SmithsVideos Wastegate refers to the exhaust side as it controls the amount of exhaust gases going through the exhaust turbine.

He has removed the standard recirc valve and blanked it, which is on the inlet side and releases trapped pressure back into the inlet when the throttle closes.

hope this helps

[blueprint45238]

@gazza726 almost, a wastegate works under vacuum until the turbo comes on boost at which point all the pressure inside the inlet side becomes positive, when the pressure reaches the set spring value, the wastegate begins to open and vents exhausts gases bypassing the exhaust turbine thus regulating the boost pressure.

Wastegate flutter happens under very rare conditions on partial load, partial throttle and is the wastegate rapidly opening and closing trying to regulate the boost pressure.

[blueprint45238]

@importsc41886 thats not the BOV its the turbo stalling when the throttle closes, as the oem recirc valve has been removed and blanked off the remaining compressed air that is trapped when the throttle closes has nowhere to go and is forced back through the compressor stalling it and making the flutter sound.

Sounds nice dude, always preferred this to the sound of a dump valve.

[sknat1]

HAHA sounds like a fuckin turkey gobbling!

[xripperx898]

this is not wastegate chatter, the chirp, chatter or whatever you call it is when the exhaust coming from the turbo has nowhere to go and reverts back through the turbo compressor making a chirping noise, it isnt bad but you have to respool to gain boost again and the bov has to be adjusted so the air does not backtrack as stated