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but I don't know much about the benefits of them.
don't ya have to install larger valves in a 20 r head to make the swap worthwile ?
I have limited knowledge of this mod, please enlighten me. what block to use -tall deck or short deckwhat block is an 84 block tall or shorthow much is to gain from this swaphow much coin should one expect to spend
i run a 20/22 for a long time, had my truck sailing down the interstate at over 100, turning 6000 rpm in 4th gear when i dropped a exhaust valve, and thats the block i have in it now, EXTREMELY TOUGH MOTORS
stock 20 on stock 22 block is 30 or more HP, put bigger valves, ie 22R valves in the 20R head and a nice stage 3-5 LCengineering cam and some dual valvesprings a 38weber, or maybe sidedraft carbs and you can get 200HP
Where do you come up with all this nonsense
Where do you come up with all this nonsense?Blah blah blahFor most practical purposes a 20r heap swap is not worth the trouble. Don't believe all the hype.
For most practical purposes a 20r heap swap is not worth the trouble. Don't believe all the hype.
I would be interested in doing this swap. Is it just a simple swap of the head? Will my intake off of my 84 Runner work. Anybody happen to have a 20R head?
You've got to be kidding me! If you've got the head off and have access to the parts and/or a bit of $$ you're dumb not to (unless you want "factory EFI" later or something like that) I've got an easy 150+ in mine and I went easy on the overbore. Could have built my own LC stroker, but didn't need a new crank. 6500 RPMs and it's beggin for more.
20Rs have a 80/81cc combustion chamber, early 22Rs 82/83cc. 20R valves measure 43mm/intake 35mm/exhaust, 22R valves 44.5mm & 36.5mm. By putting a stock 20R head on a stock 22R block you have decreased you combustion chamber by 1 or 2 cc's, but you now have smaller valves.
79coyotefrog is trying to tell people you'll have this tremendous hp gain by swapping all stock parts. This is simply not true.
Those of you who "estimate" you have a 150+ hp 22R. Have you ever drove a 3RZ. A 3RZ has around 150hp stock. I have seen very few "built" R series motors that will even compare to a 3RZ. Hmmmmm?
There have been no written results of his or mine or anyone else's hp numbers because it's not worth spending money or time for a dyno. There IS hp gained, but the number depend on your build. and using stock 20r parts is not completely worthless. I was running stock 20r head and there WAS a hp gain (again no actual numbers to verify, but the truck was faster just based on a stopwatch (0-60 time decreased) I had an exhaust manifold leak and wasn't gettin all I could out of the motor and noticed a good increase.
see, you can't compare the 3rz unless you're comparing a 22r stroker 2.7L > 2.4L so yes the 3rz is going to be better - no replacement for displacement. But why stop with the 3rz, have you ever tried a SC'ed 3.4L..it's apples vs. oranges again
Nothing said here is the bible of engines. Just opinions and experinces. Don't believe anything??...don't do it. Some people say it's worth it some don't. It's just like some say that 37's are too big, or synthetic winch rope is better than steel cable.
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