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by Peter Connan
23 Jul 2018 17:39
Forum: 09. Engines
Topic: Nissan Thermostat
Replies: 14
Views: 796

Re: Nissan Thermostat

Nope, looks good. The old one is a non Nissan thermostat I have completely removed mine. Will this cause any major problems? If so where is best (cheapest) place to get a new one? Nissan Patrol Petrol 1998, 4.5 GRX Yes, removing the thermostat entirely can cause the waterpump to cavitate. There nee...
by Peter Connan
23 Jul 2018 17:36
Forum: 09. Engines
Topic: Waterpump
Replies: 13
Views: 930

Re: Waterpump

If the thermostat has been completely removed, there is a pretty good chance the waterpump has been cavitating and is now shot...

It it has only been modified so that it can't close, then the above does not apply.
by Peter Connan
21 Jul 2018 18:35
Forum: 09. Engines
Topic: 4.8L Performance upgrade options
Replies: 91
Views: 2962

Re: 4.8L Performance upgrade options

Sorry Julian, I was answering Michael's question, not responding to your comments. Unless I misunderstood Michael's question, in which case I was just rambling nonsensically, in which case I apologize... I am pretty sure these are all 4.2 TDI's, since the 4.5 turbo he is working on is not at the dyn...
by Peter Connan
21 Jul 2018 16:25
Forum: 09. Engines
Topic: 4.8L Performance upgrade options
Replies: 91
Views: 2962

Re: 4.8L Performance upgrade options

Power and torque on all the graphs above tie up exactly. I calculated the torque of each engine from the power at two points, being 2000RPM and the point at which it makes the highest power on the tables rather than the graphs, and the results do tie up. And for reference, 180KW at 3300rpm translate...
by Peter Connan
20 Jul 2018 14:39
Forum: 09. Engines
Topic: Understanding power vs torque on a dynometer
Replies: 6
Views: 243

Re: Understanding power vs torque on a dynometer

So, to sum up: As stated before, because power is a function of torque and speed, any two engines that produce the same torque at the same RPM will also produce the same power at that same speed (RPM). But that only applies at that specefic RPM. Also, there are many factors that affect the accuracy ...
by Peter Connan
20 Jul 2018 14:23
Forum: 09. Engines
Topic: Understanding power vs torque on a dynometer
Replies: 6
Views: 243

Re: Understanding power vs torque on a dynometer

To expand somewhat: A chassis dynomometer has some element (normally the rollers under the wheels, but there are ones that bolt directly to the hubs) which is driven by the car. These driven elements (rollers from now on) are braked somehow to create a load. There are many different types of braking...
by Peter Connan
19 Jul 2018 18:36
Forum: 13. Electrical & Electronics
Topic: Dirk's Patrol gets even more TLC!
Replies: 13
Views: 555

Re: Dirk's Patrol gets even more TLC!

It was known as "Grant's Patrol" and soon it will be know as "Anthony and Michael's Patrol that they lends to Dirk for trips" :rolling: :rolling: Seriously though it is looking better and better with all the attention to deal. What was the reason for the Dynamat and foam in the doors? :rolling: :ro...
by Peter Connan
17 Jul 2018 19:17
Forum: 01. Start Here
Topic: New member - need advice on tuning TB42s
Replies: 10
Views: 609

Re: New member - need advice on tuning TB42s

It should fit between the carb body and the washer. I actually doubt it makes much difference, as it will not effectively seal off the thread. I also find it very difficult to find the point where you have to stop un-screwing on this engine. The idle mixture screw doesn't seem to make a huge amount ...
by Peter Connan
17 Jul 2018 18:52
Forum: 01. Start Here
Topic: New member - need advice on tuning TB42s
Replies: 10
Views: 609

Re: New member - need advice on tuning TB42s

Interesting... Perhaps there is something wrong with (or somebody has modified) the mechanical advance mechanism? Perhaps check the advance at higher revs? According to the graph in the workshop manual, mechanical advance should top out at about 1400 rpm and between 10 and 12 degrees advance. This i...
by Peter Connan
17 Jul 2018 18:05
Forum: 10. Drivetrain
Topic: Free Wheel hubs & Auto Lockers
Replies: 7
Views: 449

Re: Free Wheel hubs & Auto Lockers

I doubt the seals would have gotten damaged, as part of their maintenance procedure is to lock the hubs once in a while. But I often drive for extended periods with the hubs locked, and have never noticed it making any difference to the performance, the weight of the steering or even really the fuel...

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