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Old 02-03-2019, 02:03 PM
v8volvo v8volvo is offline
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Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
Posts: 1,618
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Others here will be able to give more comments on modifying the fuel pump, Anders offers upgraded pump heads and other options and could probably suggest the best setup for what you are planning.

I think for 140hp the stock pump and aneroid pin will get you most of the way there. May be good to set the timing to the high end of stock spec (around .95mm or a little more at high altitude) if you are looking for best performance and plan to up the fuel, but too much timing advance is hard on the engine and headgasket so you don't want to push the limits if you need it to stay reliable.

With the stock pump components you can make adjustments to aneroid preload, pin rotation etc to alter the enrichment curve up to a certain point and make some gains there.

In a heavy vehicle like a Pinzgauer you really want to aim for adding power you can use reliably, rather than setting a specific peak output goal. You will be tempted to use everything the engine can give you when you climb hills so make sure you match the maximum output to a level that can be produced continuously, and make cooling system improvements if needed to support it. Add an EGT gauge and oil temp gauge to make sure you stay in the safe zone in those areas. Keep in mind that making more peak hp will have no benefit in that vehicle if you can only use the additional power for a few seconds before you have to back out of the pedal on long hills to keep temperatures under control.

That said 130-140 reliable hp is probably an attainable goal if you are careful with what you do and match cooling capacity to the power. The intercooler and a suitable size VNT turbo will be a great start. The stock D24TIC engine is around 120hp so that's already close to what you have in mind. We will be very interested to see the VNT installation, several of us here have wanted to do that but as far as I know there haven't been any completed yet.

Do you have the automatic or manual transmission? 4x4 or 6x6?
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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