Quote:
Originally Posted by plumma
my hj61 runs 35's and it actually gets better fuel economy on a trip when it's loaded with my camping gear rather than empty and mine does just over 2100 rpm at 100kph, the reason i ask about injector pumps is my brothers ( the auto ) seems to only rev to 3500 rpm even when you hold it in gear and mine will happily rev to about 4100rpm. I'm not sure if it was designed like that or his has some other issues, either way i think the manual is superior.  |
Those tall tyres will be making a good difference, unless you've got 3.7 diffs installed. I used to run at 2450rpm @ 100kmh on 31x10.5x15's and now run 265/75/16 which are a bit taller and subsequently lowered revs to about 2300@100kmh approx.
I suspect your IP has been adjusted a little. Before I played with my fuel screw, my manual used to run out of puff towards yellow line of 3500rpm, but now I have unscrewed it two turns, it still has heaps of go at that speed and would probably run to 4000rpm if I let it - or let gbentink drive without me in the car
I'm not looking for high revs - I don't rev more than 3000rpm on most gearchanges and in my mind a good setup would allow the fuel supply to taper off at higher revs to reduce high EGT's at full power/high revs - but also supply more fuel lower down to build up turbo pressure early. I can max boost (15psi) at 1800rpm now, but there is not much grunt between 1000rpm and 1500rpm. gbentink has described how this is possible to adjust inside the governor at the back of the IP and one day I might venture in there with an allen key.
There might be another turn of the fuel screw coming up too!
Tim
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1989 HJ-61 12H-T, 5 speed, Jap NATO spec, 24v and Redarc Charge Equaliser, Goodyear 694LT 265/75 16 on 16x8 steel rims. Start up on diesel, cruises on 10% ULP and 90% WVO since 2005. 15psi boost, 3" exhaust and no intercooler.