power upgrade td42T

[Bucky]

for a TD42T .72 - .78 and over depending on setup. can run alot more than that on a modded pump and turbo. TD42Ti .68-.70 this is a bit touch and go and should be done on a dyno or by someone who knows their stuff. sorry cant really help with the NA stuff, havent done much with them. I barely ever touch the max fuel screw, most of the tuning is done on the boost compensator and timing and boost. then you can maybe give a little max fuel.

(this is general advise and should be done in conjunction with pryo boost and afr readouts on a dyno)

[Bucky]

OH they arent factory either. Ive found some TD42T\i pumps with timing as low as .57

[YNOT]

for a TD42T .72 - .78 and over depending on setup. can run alot more than that on a modded pump and turbo. TD42Ti .68-.70 this is a bit touch and go and should be done on a dyno or by someone who knows their stuff. sorry cant really help with the NA stuff, havent done much with them. I barely ever touch the max fuel screw, most of the tuning is done on the boost compensator and timing and boost. then you can maybe give a little max fuel.

(this is general advise and should be done in conjunction with pryo boost and afr readouts on a dyno)

That's interesting that you don't need to do much with the max fuel screw, I'd like to know more about the timing (I know how to adjust the timing and have the tools to do it) and boost compensator adjustments but that's for another time and place and for my own curiosity.

Tony

[Bucky]

With regards to the max fuel screw, its all dependant on your egts. If after doing the timing, boost compensator and winding the boost up abit (im talking stock turbo) u find u have high or low egts u then can adjust max fuel to get your highest egt around that 550 degrees post turbo. we then get into one of the biggest issues with the stock setup, which is the highly restrictive inlet path from out.of the turbo all the way to the manifold. The best thing to do is to manufacture a 2in bolt on outlet for the turbo, then make up a 2in pipe to replace the stupid pipes that are stock. Some good gains are there to be had by small mods. The faster and easier you can get the air in and out of the turbo (compressor and turbine) the better. The better it all breathes, the lower your egts will be, the more fuel and air.u can get in therefore making better useable power.

[ilovebeer]

I have a 2000 TD42 that devolpes almost no power untill it reaches about 2000rpm, I have done the following, 3" exhaust with 72mm? dump, EGT & boost gauge, Fitted factory nissan intercooler, Turbo hi-flowed by MTQ, I also played with the fuel screw and boost compensator by taking one of the shims out and rotating the plunger several directions but these made no difference, could my pump need a rebuild? I noticed the plunger had some "chips" in the chrome on it.
It starts very easy and runs smooth, although at about 1500rpm when cold it flutters a bit after it warms up no probs.
At 18psi and EGT of 520 deg it is producing 95kw at the wheels but still nothing down low, what should I try next and what order?
My thoughts were: Valve clearances, Injectors, Inj Pump rebuild (costly), Inj Pump upgrade with 12mm plunger ( more costly ), Inj pump timing?
Any help regards Dave

[Lewy]

This is the power I got out of mine With standard pump and turbo.. Done on a dyno

http://www.nissanpatrol.com.au/forum...539#post211539

[Timbo]

This is the power I got out of mine With standard pump and turbo.. Done on a dyno

http://www.nissanpatrol.com.au/forum...539#post211539

So the torque figure you said you had, almost 700.. that's in NM's? I just find that hard to believe!

[nissannewby]

With regards to the ilovebeer i would be getting in on a dyno the pump needs to be adjusted correctly from your compensator so it can get fuel in there a lot earlier with a good tune you should be able to get peak torque figures by 2000rpm.
As for the torque figure in lewys dyno its tractive effort theres no easy way to convert this to nm/ftlb etc that i have found yet.