Thread: How much boost are you running on your Auto TD5?

Std setup, de-EGR'd, silicone hoses and boost wound up to 20psi (inlet manifold pressure less ambient air pressure) per Nanocom readings.

Have only hit overboost once.

Originally Posted by Fluids

Std setup, de-EGR'd, silicone hoses and boost wound up to 20psi (inlet manifold pressure less ambient air pressure) per Nanocom readings.

Have only hit overboost once.

Same figures here (1.4bar at manifold) but I do get overboost a little too regularly but only had it derate once.

I do find though that the higher boost tends to hold back the upshift and convertor lockup and it's torque limited in between shifts.
I've just ordered a set of Samco XDB's from TD5 Alive and will order a flash map once someone can give me hard figures on what the outputs are from BAS and TD5Alive.


Using Capitals, the difference between helping your Uncle Jack off a horse or helping your uncle jack off a horse...

I just realised that because I have an Alive Tuning Booster Box installed, there's a good chance that the Nanocom Evolution can't actually tell me my peak boost pressure as it gets it's signal from the ECU and the Booster Box is altering the signal that the ECU is receiving... Going to tap a Specometer Boost gauge in today and see what that tells me.

What is available in the way of a boost gauge and how difficult to install?

Originally Posted by Aaron40

What is available in the way of a boost gauge and how difficult to install?

Pretty easy to install and get an EGT also if you don't have one. I'll send you a link to the ones I got off eBay.


Using Capitals, the difference between helping your Uncle Jack off a horse or helping your uncle jack off a horse...

Originally Posted by Aaron40

What is available in the way of a boost gauge and how difficult to install?

Any universal boost gauge will work fine. Specometer are a fairly cheap but well known brand. Autometer products are my preference though and what I've used on my turbo and supercharged engines in the past. This time I went for the Speco as it was in stock and good to go, but already regret not forking out the extra and waiting for the Autometer, they just feel and look like they're a better quality product. I'd even consider trying an electronic one next time instead of a mechanical.
I've been lazy and just put a Y-joiner in the line that goes to the waste gauge actuator (instead of tapping in an running a new line). So my boost gauge will give me a reading after the turbo but before the intercooler (this is important to know as the intercooler causes a pressure drop, generally the consensus is about 2psi on the D2's - so 20psi reading after the turbo should be 18psi after the intercooler).
I use the Nanocom Evolution to read the boost pressure after the intercooler - but as I mentioned above, I now am not fully trusting the Nanocom's readings due to the Turbo Booster Box.
One thing to consider is personally I don't like that thin nylon tubing that they include. I find it kinks very easily and generally running larger diameter tubing often brings faster more responsive readings. On my Disco I've run 4mm tubing all the way to under the dash, then the thin nylon tubing up to the top of the dash (approximately 600mm) as I couldn't get the larger diameter stuff through the holes.
As for mounting the gauge, mine is currently floating on top of my dash. I'm waiting for my MadMan EMS (the MadMan EMS can read pressure, so this could be used as a boost gauge too) to arrive and then I will mount them both centrally on top of the dash.

BTW - feel free to start your own topic if you wish to discuss boost gauges further...

Do you know if there is a difference in variation between the early and late type intercoolers and also the aftermarket intercooler? If there is how much?

Originally Posted by Slunnie

Do you know if there is a difference in variation between the early and late type intercoolers and also the aftermarket intercooler? If there is how much?

I have spent hours and hours trying to find this out (and read a lot of different threads and websites etc about it). Basically, from what I have read I have come to the following conclusions/assumptions:

The intercooler was changed with the facelift refresh. Apparently it was improved.
Every aftermarket replacement company believes that their intercooler is the best! They're also all very expensive (my previous experience is using universal intercoolers which are probably about a third of the price - essentially it is the same core, just with vehicle specific mounts and inlet/outlet sizes and shapes).
However, it would seem that there is little to no improvement replacement a refresh intercooler with an aftermarket one. Apparently the factory refresh intercooler performs well - the reason for this is that due to space restrictions, aftermarket coolers can't be any larger than the factory one, so the only difference is in the fin design and tank size etc.
A physically larger intercooler core would probably see benefits, but can't fit in the space available - I believe some people with Defenders have used larger universal intercoolers and plumbed them in with a bit of work and custom mounts and piping, but I can't see the room to do that on a Disco.
However, this may differ depending on the modifications, e.g. a VNT setup or high boost setup may see greater improvements.