Nissan-Navara.net banner

1 - 20 of 22 Posts

·
Registered
Joined
·
10 Posts
Discussion Starter #1
Hi all, has anyone done any performance upgrades to their D40 2.5 dci?
I use it for work mainly, motorway and some town driving. Just after something to improve driveability.
I have heard the hot side pipe is a good mod but just wondered if anyone had done it and noticed a difference?
Also, any other mods worth doing.
Thanks all
 

·
Administrator
Joined
·
12,967 Posts
If you have a search for posts from a user Bluenavara, he got into the high 200's bhp.
Your best bet is a remap which will release at least 40bhp, little bits like a hard pipe will make a very small difference.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #3
Thank you mate. Ill deffinately check that out.
Its not so much the power as more like throttle response, and power delivery. Just make it more driveable.
I know shes a big heavey truck but just feels sluggish on pick up. It just feels restricted id say is the best word to describe it?
 

·
Registered
Joined
·
2,726 Posts
It is very hard to change the "true" throttle response of a fairly large diesel (a lot of rotational inertia; partly as it has to smooth out only having 4cyls), plus the turbo takes a little time to pressurize (no matter how much you up the boost, it's still a "laggy" device).

A remap will give more torque, and will give therefore give an impression of better throttle response, but it is more that it just gives you more "push".

Many older guys will recall that it took years to get throttle response on petrol cars, which had started to use fuel-injection as standard, up to the levels of say, a set of Weber carburetors... FI does have other benefits though! Similarly, when turbos started to become a standard fit, throttle response was dire, and only recently some of the better cars are starting to feel like they are getting there...

What you might try, given the truck has an electronic throttle, is one of those devices that re-profiles the signal that is sent to the ECU from the actual pedal. Sure, all it does is fool the ECU into thinking you are faster to press the throttle further down, but it sounds to me like that could work.

LM^4 (elephant's memory man) may recall the item I am talking about...
 

·
Registered
Joined
·
362 Posts
I have the tdi tuning box which is good with 7 modes which are gimmicky but there is a difference.

I have just imported the idrive throttle box that freeman Steve mentions below. I’ll fit it tomorrow if I get time and let you know what it’s like..... the throttle response is the thing that ruins the drive for me, so I’m hoping to eradicate it with the idrive.
 

·
Administrator
Joined
·
12,967 Posts
It should help, if it is throttle response then a hard pipe will help a bit. At least you haven't got a V6, any brisk acceleration from standstill on the wet roads today just turns into wheelspin...
 

·
Registered
Joined
·
10 Posts
Discussion Starter #7
Cheers guys. This is a very helpful forum and you all seem to know what your talking about. One of the best ive used for sure.
Id love to know how you get on with the idrive unit. How much was it if you dont mind me asking?
Thanks again guys, keep it coming
 

·
Registered
Joined
·
20 Posts
Performance

I have just blanked the egr. Makes a decent difference on pulling away and fuel economy is improved. Next is a remap as I shall shortly be offering the service and what to do mine before and after on their dyno to prove the figures!>:)
 

·
Registered
Joined
·
10 Posts
Discussion Starter #10
@Jimbob39 where did you get the blanking plate from mate. I bought one a bit back and it didnt fit even tho I double checked it was for my truck.
Also, what sort of milage are you guys running when re-mapping?
Mines on 93000 and just worried it will put too much stress on the engine/other components and cause issues.
Its my daily for work so need it to be reliable aswell
 

·
Registered
Joined
·
2,726 Posts
I would think most people believe that an engine producing more torque would put more stress on the drivetrain and therefore have an adverse effect on long-term durability, even if was marginal. It is known that for rotating components, the rate of wear is roughly in proportion to average torque through those components.

And wear on an already high mileage truck tends to happen at a faster rate.

I am a bit biased as I am extremely dependent on my truck, as it tows my 5th wheel and needs to be entirely dependable - I don't want break down say, in the Spanish mountains, or even on the North Scots coast. I do however wish I had the cash to have a second 'fun' car I could tune and mess with and thrash about in. Having just bought a house though, it is just a pipe dream!
 

·
Registered
Joined
·
20 Posts
Navara on 119k. Blank came from eBay and fits spot on comes with 2 gaskets. A6 3.0 v6 tdi that I’m selling has 172k, mapped to 290 brake and goes like the clappers! A decent map isn’t all boost and bang! I’m about smooth delivery. Less mechanical strain, plus keep on top of servicing and any faults get dealt with immediately! This is the blank I use from ebay 172311096211
 

·
Registered
Joined
·
10 Posts
Discussion Starter #14
@s60r whats the name of the idrive box please mate? Or what would I search for in google. Have you had any issues with the tuning box at all?
 

·
Registered
Joined
·
362 Posts
Cheers guys. This is a very helpful forum and you all seem to know what your talking about. One of the best ive used for sure.
Id love to know how you get on with the idrive unit. How much was it if you dont mind me asking?
Thanks again guys, keep it coming
Well the idrive is really impressive!

I might write a full review in a new thread.

It is installed in minutes and has 4 modes. I have today been toggling between off (factory mode) and ultimate 9 which is the most throttle response. The difference is immediate and impressive! It really hustles along where stock is so slovenly. Pulling out on a busy roundabout is possible again!

I’m sure I won’t keep it in u9 all the time as it’s actually a bit fierce in traffic...... most over in Oz seem to settle on around u5 for daily driving but it responds almost instantly against the factory set up. A really nifty bit of kit for 150 gbp.

I also have the triple channel tuning box from tdi tuning and it works perfectly in tandem as it would for a car running no mods at all.

Thoroughly recommend it.
 

·
Registered
Joined
·
362 Posts


Yes that’s the one... as long as you have a d40 of course! ;)

Had to turn mine down to u5 today in the wet as it kept spinning up! Really impressive little mod.
 

·
Registered
Joined
·
2,726 Posts
It is an interesting idea!

It will probably use a bit more fuel:

Given the throttle is already electronic, the ECU maps readings from the throttle pedal position sensor onto fuel supply timings and boost pressure, and what the device does is to basically fool the ECU about the pedal position - it's as if, in a crude example, you press the pedal 25% down, but the device reports the pedal is 50% down (depending on its settings)... It is literally is a "pedal remap".

I am not sure of this being part of the deal, but clearly if the device could measure "rate of change" of the throttle pedal position (i.e. track 1st derivative) it could in theory apply excess pedal position data in advance of the pedal actually reaching a certain position, if you follow..... In the best case, if a human mashed the throttle, let's say it takes 1/2 second, but if the device senses the speed the pedal is moving over say, 1/10 sec, it could near-instantly report the pedal at 100%, thus being way faster than a human.... I bet this is a feature of F1 cars!
 
1 - 20 of 22 Posts
Top