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R51 specific technical questions & information

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14 posts • • 1, 2

by rotelman » Sun Mar 11, 2007 4:26 pm

Has anyone fitted a Turbo Boot Guage to their R51? Would be interesting to monitor Boost presures under different conditions If so, how did you go about it

rotelman      

by rodv61 » Sun Mar 11, 2007 9:34 pm

It is probably not worth the effort given the turbo kicks in at 1100rpm and is at full boost at about 1500rpm, so you will always be above the max boost unless you drive around with a hat on.

Rod
Pathfinder 2007 ST-L TD Auto, Tint, Ausguard Cargo Barrier, Nissan Tow Kit, Polyairs, Checkerplate sump plate, DBA/Bendix, Yokohama A/T-S, Camper trailer that's that old it doesn't even have a brand.

rodv61       Posts: 172   Joined: Thu Mar 08, 2007 10:12 pm   Location: Blue Mountains  

by jorgecar » Sun Apr 15, 2007 11:59 am

rodv61 wrote:It is probably not worth the effort given the turbo kicks in at 1100rpm and is at full boost at about 1500rpm, so you will always be above the max boost unless you drive around with a hat on.



Do you know how much boost in psi or bar do our 2.5 turbodiesels make?

I know our engine uses a Garrett GT2056V, but maybe could be swapped for another VNT like the GT2256V, GT2260V, GT2359V or GT2556V for more airflow...
more air + more fuel = more power!

Upgrade also the intercooler and pipes, plus correct engine tuning and I bet we could get between 250 - 300bhp easily.

Silver 2007 Pathfinder SE 2.5dCi

jorgecar       Posts: 33   Joined: Tue Feb 13, 2007 3:27 am   Location: Costa Rica  

by geoff&vi » Sun Apr 15, 2007 12:26 pm

Hi all,

Jorgecar, i would be very sceptical of the longevity of the motor if power was anything above 210-230bhp. Overboosting and overfueling would have detrimental effects in standard form, without any work to strengthen up the internals.

I am investigating the Steinbauer chip upgrade, which gives 154kw & 480nm. Having driven a Navara this week with this mod, i can attest that any more power would be overkill. The percieved turbo lag below 1700rpm, is actually fuel lag or underfuelling and the Steinbauer(as do all chip upgrades) increase fuel flow at low revs, rectifying the problem. The difference has to be experienced to be believed, when you take off no delay, just instant acceleration.

Hopefully i will have my Steinbauer within the next few weeks and i will give an update.

cheers
Geoff

GONE - 2005 ST-L TD
NOW - 2012 Prado Kakadu V6... OL winch bar, bilstein 2" lift, Runva 11xp, light force 240's, dual Optima batts, Bushskinz bash plates, towing a 2012 Modcom HF

geoff&vi       Posts: 284   Joined: Thu Mar 02, 2006 11:07 pm   Location: Brisbane  

by jorgecar » Sun Apr 15, 2007 1:58 pm

Hi Geoff,
You have a point there, besides the high cost $$$. I was just day dreaming...
I was reading around on VW TDI forums and some bump their 1.9TDIs up to 230-250bhp with turbo swaps and use them as daily drivers, guess they're time-bombs on wheels! ha!

Kitpower also has a piggy back ECU good for 162kW and 508 Nm, which I'm currently considering:

?rub=zoom&moteurID=1099&marque=Nissan&modele=Pathfinder

Don't forget to post your impressions or dyno if available.
cheers,
Jorge

Silver 2007 Pathfinder SE 2.5dCi

jorgecar       Posts: 33   Joined: Tue Feb 13, 2007 3:27 am   Location: Costa Rica  

by jorgecar » Tue Apr 17, 2007 2:22 am

Geoff,
On Nissan forums from Spain they mention 2.5 dCi engine tuning/ECU from NTDD

They have their own dedicated raid/rally race program and also prepare vehicles for the general public.
Forum members swear by them, and mention having up to 3 different tuning programs selectable at any time, preloaded into their ECUs by NTDD.

You could check them out, another option besides Steinbauer.
cheers

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