Pete M Posted June 2, 2019 Posted June 2, 2019 somewhere on the internet is the renix hp/torque chart, but all I keep finding is what I believe is the HO version.
Minuit Posted June 2, 2019 Posted June 2, 2019 That looks like the HO power curve to me. The HO peaks somewhere around 3600 rpm (and in my 91, you can definitely feel a significant increase in torque as you approach 3000 rpm). With MY Renix at least, there is absolutely nothing of value past 3000 rpm except more noise.
JMO413 Posted June 2, 2019 Author Posted June 2, 2019 Mine pulls nicely to 4000 that's all I've ever pushed it. Glad to have so many responses all worth thinking about. I wish I hadn't spent money rebuilding the original D30.
gogmorgo Posted June 2, 2019 Posted June 2, 2019 Just looking at dyno charts is a bit misleading as well. Torque is largely a function of airflow, which is dependent on RPM, throttle position, and engine load. Power pulls on the dyno are always at wide-open throttle and effectively 100% load, which isn't a very solid reflection of engine conditions while doing anything much, except maybe drag racing. Something odd that I noticed after going from the 235/75r15s on my ZJ to the 31x10.5s (effectively a decrease in rpm and increase in load) is that on ~55-60 mph roads when I stick to the speed limit, I'm getting better mpg than before under the same conditions (20-21mpg vs 19-20, but if I'm doing ~70mph it just sucks back the fuel compared to before, 15-16 vs 18-19). Part of that is also going to be the added drag from the larger tires and taller aerodynamic profile, but it's only sitting about an inch higher than before. I want to say there's been an mpg improvement around town as well, but that's also including less idle time now that it's warmed up since winter, and significantly less 4x4 use on the street.
gogmorgo Posted June 2, 2019 Posted June 2, 2019 1 hour ago, JMO413 said: I wish I hadn't spent money rebuilding the original D30. It'll sell for more when you pass it on to someone else then.
13 Legion Posted June 5, 2019 Posted June 5, 2019 Kind of a longer video. Good info on gearing though. Hope it helps someone!
benjy_26 Posted June 6, 2019 Posted June 6, 2019 Oh man...my 2.5 *begins* to pull at about 3k rpm. I think I may need to go to 4.88's. 🤔
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