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Fortunately for me, the situation isn't so dire as your graph suggests. This is not the I3 993cc engine, but rather the I4 1296cc engine.
So we see that the Charade engine has almost the same max power as the Rocky engine, but at 6000 RPM instead of 5000. The available HP falls off real fast at lower RPM.I do most of my driving in the 2000-3000 RPM range, which yields 50-80 HP. To roughly equal that in the Charade-engined Rocky, I will have to rev between 4000 and 6500 RPM. Personally, I hate the idea of revving an engine that fast
Based on the hp/tq curves of the 1.3, if you have the overheating issue resolved, I would try running it at a higher rpm, w/higher shift points, and see how it runs, you aren't going to hurt it, and might just be able to maintain a little speed on hills.
One concern I have: I'm told that higher revving engines wear out faster, especially engines that get revved way up to pull things around. Won't I wear out this engine pretty quick revving so high all the time to pull a vehicle that weighs more than the one it came out of?
OK, I finally got the new timing belt today, and got it installed. Working in the driving snow at 25*F is sub-fun, but at least it's all together now. In a couple days, I'll take it out for a definitive road test and see whether I think this Charade engine can pull it around or not. The fan sure moves a lot more air with the clutch re-done and a new belt on there, plus I got a lot of air out of the cooling system after filling it today, so I'm hopeful that the overheating problem is solved.Meanwhile, I think this thing needs a name: It's now officially The Old Gospel Ship, after the Joan Baez recording"...I'm gonna take a trip in that old gospel shipand go sailing through the air"If this name makes no sense, remember that this is a vehicle with a short wheelbase, worn shocks, and a stiff suspension. Every time I drive it over my rocky driveway, I literally do go sailing through the air at every non-trivial bump.
OK, I'm so late on this update.A while ago, I changed the timing belts and got the cooling system working. I took it for another test drive, cruising around 3000-3500 and upshifting at 4500-5000. Thanks to the exhaust leaks and aftermarket intake, it made an incredible amount of noise at that RPM, and got the job done, sort of. On my commute to town, which is mostly downhill, it did fine. Coming home, mostly gentle uphill, I pretty much never got above 3rd gear. On the last mildly steep hill where the speed limit is 65 mph, I had to downshift to 2nd and rev waaaay up to get to 40 mph. Even then, I couldn't shift to 3rd.Throughout, if I upshifted too soon or gave it too much throttle, the engine let me know very fast that I had done something wrong, with large amounts of pinging and a tremendous ruckus. Not wishing do destroy anything, I soon learned to keep it revved high and go very, very easy on the gas.I conclude, therefore, that a 1.3 liter sedan engine cannot be expected to lug around a vehicle that would be kinda slow with a 22R. Wish I'd known that earlier, but
4BT swap.
Here's another picture:Any guesses as to what's going on with the Rocky?
For the record: I've read through a number of 22R swap threads, some claiming that a SAS is needed, some saying suspension and/or body lift to fit the engine. It depends on how you want to do it, but I'm not going to need either. The front diff is about 1/2" below the oil pan. (IFS with non-moving diff, so that's fine). The hood will have space to close. The price for that is that there's no space for "real" motor mounts. I'm trying some rubber sandwiched between the engine and frame brackets: if that doesn't work I may have to get creative.Also, the Rocky transmission has the shifter 26" back from the bell housing and the G52 has about 18". I see a real interesting shift linkage in my future, too.I'm inventing stuff as I go here, so copy my techniques at your own risk.
Could you not cut an inch or so out of the frame mounts and weld them back on?
Your still going to be transfering engine vibration through the bolt to the frame.
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