TD5 Wastegate Modulator

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bankz5152 said:
thats what the wastegate does!

Vast blank em off on D2s, they can be decent but generally arnt that helpful
Click to expand...

they improve the response by holding the wastegate shut longer when required. There’s a noticeable difference. Wondered if anyone had retrofitted it on a defender. Looks like I’ll have to just try it! It’s only a couple of wires and some reprogramming
 
sierrafery said:
I'm watching this with interest
Click to expand...

well it’s in and working. I extended and re-purposed the redundant EGR modulator wiring. Got some testing to do but seems to work well!

F3D09B45-15C2-425C-8CCC-D670E12DB5C9.jpeg
 
lightning said:
How does that improve the performance, is the turbo quicker to respond?
Click to expand...
I'll explain as short and as clear as i can: The ECU is managing the modulator to keep the wastegate closed untill the boost rises then opens gradually as to keep the boost as high as possible below the overboost limit which is effective especially on acceleration from low speed cos then all the boost goes to the inlet nothing is wasted while on the defender without moulator the wastegate opens on the turbo pressure from the beginning without any controll(unless the wastegate is tightened) so the full power will be reached only under heavy load
 
sierrafery said:
I'll explain as short and as clear as i can: The ECU is managing the modulator to keep the wastegate closed untill the boost rises then opens gradually as to keep the boost as high as possible below the overboost limit which is effective especially on acceleration from low speed cos then all the boost goes to the inlet nothing is wasted while on the defender without moulator the wastegate opens on the turbo pressure from the beginning without any controll(unless the wastegate is tightened) so the full power will be reached only under heavy load
Click to expand...

Exactly what I was going to say.

lightning said:
Sounds like a modification worth doing then.
Click to expand...

I think it is.
 
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