Blow Off Valves?

[ard]

I wanted to write "If you are serious about mods, find a real tuner (not an 'installer') and ENGINEER a total package: Intake, exhaust manifolds (drop the cats? new pipe), exhaust that captures the upgrade to the manifold, serious DME programming (change the throttle mapping to achieve the sprint booster effect), more efficient intercoolers, etc, etc..."

But I didnt, as my read was this is not a serious player ...I could be wrong, but to REALLY change performance takes time, skill and $$$

Skip bovs or diverters (IMO, a joke unless you go to way larger turbos and the current bypass is ineffective). These engines ARE moddable, but DIY bolt ons arent significant.



And I have zero doubt there are people singing the praises of BOVs on forums all over- as there are many people saying air filters give them dramatically more HP. In fact, is there ANY mod that people buy and say "Ah, yeah, that didnt really work".

Nope.

A

PS Sprintbooster may be a perfect product- makes people THINK the car is stronger but actually makes no real changes other that reducing gas mileage.

[Penguin]

Originally Posted by ard

Skip bovs or diverters (IMO, a joke unless you go to way larger turbos and the current bypass is ineffective). These engines ARE moddable, but DIY bolt ons arent significant.

I've found this to provide an effective performance boost:



Sorry, I just couldn't resist...

[ard]

Originally Posted by Penguin

I've found this to provide an effective performance boost:



Sorry, I just couldn't resist...

Oh, now you're talking clip on mods?!?!?

[jeremym]

Originally Posted by ard

Oh, now you're talking clip on mods?!?!?

For some reason, I actually could see/hear ard getting pissed about that. Obviously he wasn't, but still, the thought was funny.

[huntertec]

I transformed my diesel X by having the ECU remaped and modified the exhaust to relieve back pressure, also removed the heavy sock off the air filter. End result 203kw (276 HP ) 615nm (452 fp torque ) more than enough for the lighter E53. The company that organised the remap on my car through a German tuner told me for a 40d, a stage 2 tune will achieve 280 kw (380 hp ) 740 nm ( 544 fpt ) with that tune your vehicle would be a rocket ship, then an exhaust mod and your away. My X has been extensivley modified with suspension, wheels, big brake kit, flares, spoilers, etc, all of the changes have been carefully thought out, and all have delivered a good end result. Their too nice a vehicle to mess up. Just my thoughts.

[X5X]

Originally Posted by huntertec

I transformed my diesel X by having the ECU remaped and modified the exhaust to relieve back pressure, also removed the heavy sock off the air filter. End result 203kw (276 HP ) 615nm (452 fp torque ) more than enough for the lighter E53. The company that organised the remap on my car through a German tuner told me for a 40d, a stage 2 tune will achieve 280 kw (380 hp ) 740 nm ( 544 fpt ) with that tune your vehicle would be a rocket ship, then an exhaust mod and your away. My X has been extensivley modified with suspension, wheels, big brake kit, flares, spoilers, etc, all of the changes have been carefully thought out, and all have delivered a good end result. Their too nice a vehicle to mess up. Just my thoughts.

Yea, those are the figures I heard I just need to find a shop in London that can achieve this kind of HP gain with the ECU, and I'm still deciding on the exhaust.

[huntertec]

Try POWERS 1 on the Forum, I haven't spoken to him for a while, I'm sure he is still around, he knows his craft well. I've been assured these figures are a safe acheivement. The 40d has had extensive engine upgrades over the 3.0d. Good luck with it.

[X5X]

I have SprintBooster on my cayenne and I love it! Everyone who has tried it does. It helps drastically when overtaking, and I did not notice a drastic change in gas milage. Especially with the V3, when driving through town, I switch it off, so gas milage is not affected.

As for air filters, I have an AP intake on my cayenne, and the difference in performance can definitely be felt. But I haven't heard of anyone changing their filters on an X5 d, so thats why they are a maybe.

[ard]

Originally Posted by X5X

Yea, those are the figures I heard I just need to find a shop in London that can achieve this kind of HP gain with the ECU, and I'm still deciding on the exhaust.

Does Sal with Evolve Automotive work on diesels? They are in your neck of the world, AND Id trust them to do anything....

[X5X]

Originally Posted by ard

Does Sal with Evolve Automotive work on diesels? They are in your neck of the world, AND Id trust them to do anything....

Yes, they are not far from me, about a 30 min drive. What do they do other than ECUs?