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Gnarly,Do any of your computer dyno runs show the 'dip' I usually see in the dyno run I usually see around 3k +- rpm for various vehicles?This is for my Sportster (883): first is dyno at dealer, second is something called a 'road dyno' (search images 'road dyno software')I've used the 'road dyno' on my 86 22RE truck and 64 Plymouth Valiant slant 6 225, and they both showed the 'dip' (don't know where I put the .jpg of those) that DON'T show up on a computer simulation (Desktop Dyno 2000 & 2003)
I'll come back and read everything later but some highlights from my memory stock 20 R carb is 190 cfmstock 22R carb is 325 cfm which makes the 3236 weber a perfect replacement but the stock carb out performs the weber for offroading in tuned correctly20R combustion chamber 75cc early and 81cc ish in 79 and 80 and up.22R is about 85cc also22re 55cc 22RET is also 55cc (pistons are different)stock 20 and 22R cams was around 390 and about 190 duration it started off about the same ramp as the 215* but since emissions sucked the close side drops off sharplyMy setup has one thing I really love about it. when pulling a heavy load once my soninlaw and daughter were following me and she called me on the cb and said "Dad, do you know that when you shift a 3 or 4 foot flame shoots out the exhaust?"
Hey 79coyotefrg.... where have you been hiding?? Gnarls.
been having bad migraine headaches and the medicine screws with my memory
you won't see much after freeing up the exhaust and having a good tune up. I did a cam, intakes, AFM messed with. The header helped, proper gearing was huge, not much else did anything.
I believe it was 102 hp, So sad!
The rule of thumb is 15% loss....So 102 / .85 = 120hp.........
Gnarly, are you still planning to have your truck run on a dyno?I have only known one guy to do it with a 22re. It was a 2.7L stroker build by engine builder.The results.... well...... very disappointing. I believe it was 102 hp, So sad!He made a few changes and had a second set of dyno runs performed. the result.... well........ more disappointing. 100hp on the dot. Oh and the but dyno, I rode in it three times and drove it once....Well....... Yep.........You guessed it very disappointing. I rode in Andrew's 4runner with the 3rz once. Well....... It would have destroyed that 2.7L stroker 22re, no question.
I have a friend of a friend over in Missoula who recently had something like 50 HP at the wheels with a stock 22RE with a typically built 4Runner, so 102 HP may be pretty good in reality.I liked the 3RZ, but I did not personally think an additional 40-50 horse was worth the trouble of the swap. Don't get me wrong it was that "just enough more" that you wish your 22re had. Perfect trail rig engine for sure. It's just that the exact same amount of labor could get you a lot more power.Next time I do a real swap I want to do a 1UZ or maybe a 2UZ in something. Like a mild looking pickup with skinny 33s on it .I think, after having a 3RZ, several 22re, 20r, and the 22r that the 22re EFI is the limiting factor, both the best and worst thing about the 22re. I can net large perceivable, seat of the pants changes with carb with a small amount of effort, where you can throw all kinds of stuff on a 22RE and you won't see much after freeing up the exhaust and having a good tune up. I did a cam, intakes, AFM messed with. The header helped, proper gearing was huge, not much else did anything.I know this rambling is kind of off the topic of the cam thread, but I think the relevance is that what I found over the years was the 22RE is probably happiest in a near stock state of setup.
Gnarly,Do any of your computer dyno runs show the 'dip' I usually see in the dyno run I usually see around 3k +- rpm for various vehicles?
My thinking was that you seemed to be highly reliant on the software for your cam selection, and in the rpm range you were interested in I've always seen dips in the torque curve on 'real' tests.If the software you were using didn't show dips (desktop dyno doesn't seem to be good enough to show dips) you could easily pick the wrong cam.
I thought bean dip gave you rocket propulsion...........
Since this discussion is ranging all over the place...I've never understood how parasitic loss through the drivetrain could be a percentage. That would mean a really powerful engine would lose more power than a less powerful engine turning the same components at the same RPM.A transmission should take a given amount of power to spin it at a given RPM. The internal friction would not change based on the engine in front of it. Same with differential and all the other sources of losses such as the axle bearings, u-joint bearings, tire rolling resistance, etc.So let's say we have an engine that puts down 150 HP at 5000 RPM on an engine dyno. Put it in the vehicle and you're seeing 100 HP at the wheels - you have 50 HP of loss in your drivetrain at 5000 RPM. If you put an engine that is making 400 HP at the crank at 5000 RPM in the same car you should see 350 at the wheels.Can someone explain how that line of reasoning is wrong?
This is kind of interesting: http://www.superstreetonline.com/how-to/engine/modp-1005-drivetrain-power-loss/TL;DR: The 15% "rule" does not hold true at all and varies widely. A more powerful engine will experience a higher HP loss on a specific drivetrain due higher acceleration (dynamic drivetrain loss.)I would guess our little 22RE platforms lose way more than 15%. Our drivetrains are built (over-built) for reliability, not efficiency.
That link triggers my malware/virus software. Looks like it tries to download something onto your computer when you open the page...?
..........google which usually weeds stuff like that out??
... If the software you were using didn't show dips (desktop dyno doesn't seem to be good enough to show dips) you could easily pick the wrong cam.
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