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BTDT numerous times.

The head and timing chain stuff showed up today. I've tried a dozen different times to post pictures, but can't seem to figure it out. I've searched, I signed up at a few picture hosting sites, I danced naked in the yard chanting...I give up on picture hosting/posting.

<img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" />

The head looks neat and smells great. Yes, I said that. It smells good! I love that smell... it reminds me of the good old days when I worked in a motorcycle shop. I'd post a motorcycle picture here but if I start screwing around with pictures again I think I'll have a stroke.

If anyone really needs to see a picture, check out EB's site and enjoy.

Strange, when I dance naked in the yard interesting pictures always seem to pop up all over the internet...

She's a runner! EB's streetRV head with 261 cam (question on this later), new timing chain, new alternator, radiator, clutch, and so on... It's so nice to have my truck back in working order.

Question about the cam-at idle, there is no mistaking this thing has a cam. It lopes like crazy. The TRD cam in the stock head had just a hint of that, but not at all like this. I thought, and correct me if I'm wrong, that the 261c cam would have a better idle than EB's 268 cam. Or do I have this backwards? I have no idea what the TRD specs were.

The only thing I haven't done yet is get rid of that POS LC header. As soon as I can locate stock exhaust goodies forward of the cat, I'm bolting them on.

TRD cam specs:
http://www.4crawler.com/4x4/CheapTricks/EngineMods/index.shtml#CamSpecs

For the idle issue, double check everything. My engine had a loping idle after cam install. Turned out a bolt had backed out of the EGR valve and that caused a vacuum leak. Check the TPS as well.

Thanks for the link, Roger. When are we going to start calling you Dr. Brown? <img src="/forums/images/graemlins/lol.gif" alt="" />

The TRD stage 1 cam, if I'm reading the chart correctly, is damn near identical to what I just bought from EB. 262 for TRD vs 261 from EB.

My steat of the pants dyno noticed that the motor a hell of a lot smoother now. I can't tell if there is any power difference though. I'm not sure what I can reasonably expect with the head and o/s valves. To be fair, the motor isn't broken in yet and I haven't driven the truck in 2 months.

With the TRD cam and a cold engine, it seemed to have a pretty good hit just above 2500rpm. Once warm, it felt strong down low. When in 4 low, it felt like a darn tractor from idle. Obviously, I haven't put the new build up through any of that yet.

If the 268 was sent in error (it was installed in the head when I ordered it), the idle could potentially be poor. Correct?

I'll double check for loose bolts just for fun.

Just an afterthought-a pinch of throttle or even if you turn on the AC,the idle smooths right out. Does that indicate anything to anyone?

What do you have your idle rpm set at? I always adjust the idle for a cam to around 1000 rpm.
Danny

It's set a bit low-around 750rpm according to the dash. Dialing it up a bit should help. I think I'll do just that.

>>>*Morning!

I just answered your email privately, but I will add some more here.

The 261C is actually our middle cam design if we use the "small, medium, large" method most suppliers use.

I probably manage to confuse folks on that since the actual advertised duration figure is meaningless. In fact, that can't even be measured, it is a computor generated number.

What matters is the difference in degrees between theoretical and actual @ .050" lobe rise. Plus the most important event, the intake valve closure point.

Simlarity between the very nice TRD designs and ours ends at the point where they look alike and bolt in.

The 268C/Torkr is 50 degrees, the 261C is 39 degrees. That TRD is 48 degrees. Thus the 261C is a much faster early rise ramp than the 268C, so we expect it to have a mild chattery idle.

Add in a very free flowing header, and other mods?? Yep, the idle at stock setting starts to get sloppy.

Fix that by speeding the idle up a bit, make sure the added manifold vaccum isn't making the EGR bounce.

4 Crawler beat me to the leak possibility, check for that too.

Now if the old head had been surfaced, of course that effectively retards the valve timing. Power moves up the RPM scale, add in a mellow intake ramp and a crossflow design like that TRD1 is?

Yep. Smooth idle and late powerband.

You can tune most of the bouncy idle quality out of her, or you can just grin at the folks sitting next to you at the stoplight when they turn to look at you if you like the way she runs.

Of course you could just stick that TRD back on there if it isn't worn, you might like it better, driving style is different with everyone.

*It won't hurt my feelings any.....*Snif**.... <img src="/forums/images/graemlins/lol.gif" alt="" />..

Bet if you do it now should be smoother with much lower end than before with the old stock head.

Here is a neat rrick to smooth her out some, just increase the valve lash to stock settings, .008" and .012". There will be more tappet noise, that is harmless, but this effectively reduces duration. She should noticeably smooth out..

*I hope this makes sense?....*EB

Hey, EB! Thanks for the scoop on the cam differences. The motor is now so smooth as far as power delivery goes that it's kind of deceiving. With the stock head an TRD cam, there was a noticable hit. I didn't like it.

I think I'll keep it where it is and be quite happy with it-as soon as I get rid of that header. If I recall, you once wrote a lengthy article for us on building up a 22re and in that article, you seemed to like the stock header just fine. I'm going to back to it for several reasons, one of which being smog. They guy who did most of the work on my motor thinks that the free flowing headers have an adverse effect on smog readings, so they are coming off.

When I slap the OEM headers back on, will that help the idle at all?

Thanks again for all of your (and Tod's) help. It is greatly appreciated.

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