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Gnarls,I have been reading this thread with interest....
... My main concern is the 3-4.5k range, where the 261 and 252 are nearly identical. This is the high-altitude interstate pass-climbing range. Since my gearing is so low I am not concerned with torque under 2k.
But, the 261C cam has several pads that are off the lobe between .108” to .112”, and I posted photos of this...Even though Tod at engbldr said it's OK, I still don’t think the alignment should be off that much
Some people I know would not call it "beer"! Gnarls.
...Can you describe more about the "base circle valve lash adjust" and why that is only done to 1 and 8 intake?
Yes... when adjusting valve lash per FSM, those two cylinders will be at 90 degrees on each peak cam lobe. The other 6 will be located at the base of circle. I'll post a photo tonight.Gnarls.
Please let us know what the thread sizes are for the banjo bolt (12mm x 1.5 ? ? ?) so the rest of us can be frugal........
Again, interesting spreadsheet! My butt dyno denies the low torque (haha), but the little bit of highway I have done is confirming what I see over 3k. My truck is pulling hills in 5th around 3k that definitely required a downshift before.
I completely agree with no low end with the 261 cam. On my way from Utah to Montana and home to Washington any time the RPM'do went below 3k I was down shifting.
The Schnieder is interesting too.
Look at the torque numbers on this Excel sheet produced by Engine Analyzer - from off-idle to 3,000 RPM for the 261C compared to the stock cam, and the other profiles.Mudder, do those torque numbers seem close to what you are experiencing?Gnarls.
If that were accurate it would explain why I prefer the stock cam over the 261. I do disagree with it going all the way to redline as over 4.5-5k the cam just falls flat on its face.
Well that rules out fuel pressure.
I think if you chose either cam you would significantly increase the number of dollars you've spent on the motor which is where the upgrade will be most noticeable. at least with a thinner wallet, your butt dyno will be lower in the seat and you might be able to feel a difference. in all seriousness, you should take all future funds you plan on spending and save for a dual overhead cam 2rz/3rz and never look back. i feel like I am pleading with a gambling addict who thinks if he keeps spending more he will win
I'm at the point where I'm trying decide to just reinstall the stock cam that came out of head.
I love my 22r and I don't want a 3RZ in my 4Runner anymore, but I will concede you will never, ever get the power, drivability and economy of the 3RZ with a 22RE, even on a pimp's budget.
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