Can you please explain compressor surge for a newby like myself

How you get your mot done etc., after all this tuning?

@@TheChrosty surge is when the turbo isn't able to sustain the Pressure ratios in the intake system and the boost(air) blows out back up the intake ( like a release) when the balance equalises the turbo boosts up again until the next cycle, this then sounds like a whoosh whoosh. Once the Ve of the engine is such that the air is able to consumed the surge will go. You overcome this by reducing the flow from the engine or using a compressor wheel that supports the Pressure ratios you are trying to run.

@@TheChrosty Too much boost for too low flow. In that case air goes at wrong way, instead into engine it runs away from compressor. With adequate N75 and boost map that could be resolved. Surge on high rpm could destroy turbo, because of high flow and high exhaust manifold pressure, turbo shaft, seal and compressor wheel could be destroyed. Forged compressor wheel can sustain more stress on big and hybrid turbos.

Hamza pal will you be going to stage 3 on your DAZA RS3? We’d all love to see that.

Will is a top guy indeed 👍🏼

@TRHamza loving the MK8 R series many thanks

Volkswagen Audi [ Group ]

@@dbnyc7846 VW AG

@@TRHamza tbh, dealt with Will for years. He’s good when he wants to be Lol. He can be an absolute dimwit sometimes. Best dealing with him at arms length.

Agree 100%, similar situations were happening when the mk7 came out when comp wheels were increased in size, larger in ratio to exhaust wheel creating the surge. Prob need to move to a new frame rather than increasing turbine wheel size looking at how little meat there is between the turbine housing and the wastegate port.

hi haven't got a clue how to collect my gift I'm hoping its a transfer box for r32 joke but if you no someone I'm interested do I need an app telegram?

you still haven't told me how to collect my free gift is this true or a scam could you let me know thanks don't have Instagram🤨

He doesn’t celebrate Christmas dude, he’s a rag lmao.

Regarding the gen 3, it’s more when reaching 600+ nm they become ticking time bombs, they really can handle some horses. High torque in the lower rpms is what breaks the 2.0 tsi

From the clips we’ve seen in this video it won’t last very long. There is too much strain on the engine

We will have to see I guess

Would MRC be able to send a map for my car in the states? I would love to get a tune by them

@@fokdat6318 2.0T FSI u mean

From what I’ve seen the RAAX technology helps with turbo lag and react to changes in engine load quicker. I guess both go hand in hand. Seems to be more of an efficiency thing to try and help reduce emissions first and foremost. By the sounds of it this hybrid doesn’t struggle with lag since Doug was having to hold it back in the lower rpm. Maybe this hybrid retains modified compressor design that’s why it’s causing surge.

@@Mac_F87 indeed, It’s Able to move the same amount of air with a smaller wheel. So with the same size wheel as an is38, It’s able to respond quicker and move more air at the same time. Precisely what you see comparing the Continental unit with the is38. I don’t know if you’ve seen what the raax technology looks like compared to a regular radial wheel, but it looks like this hybrid has a standard radial wheel without as much of a curve on the blades as the RA wheel has. But since it’s a hybrid, they would have to clip the back of the blades for it to fit because the turbo housing itself is different to a normal turbocharger housing. I would expect it to still have an advantage over a normal turbo, but the difference wouldn’t be as big compared to radial vs radial axial. I’m going to see if I can talk to turbo technics about this