>>>*The gentleman's email came in first with the same heading. I doubt he means anything by it.

It doesn't bother me any, I can't keep cams in my building anyway. I have 200 on back order right now and had to quit listing until I get restock.

The simple fact IS that any cam change combined with other additions certainly CAN equal problems, we have no choice but to design from a bone stock application, of course.

So I want a solution, just trying to help, figure out what is going on. I am way behind a lot of you folks on tuning problems, thus I suggested the gentleman post his concerns here so my peers can offer help.

Since the vast majority of users report nice results, I need to know what is different here.

That is why I personally bumped this thread, I could have just let it go off into cyberland and forgot it.

I think that what is going on is a combination of additions, these engines are sensitive to changes. The 261C is so close to the Comp Cams 260 that some mistake it, not noticing the nose design for quieter operation and the fatter ramps. The profile is simple and will normally have zero detrimental effect on the way the engine runs, simply adding air flow potential for some power gains.

Yet some report a chattery idle, some report smooth as silk, some report a need to bump up the idle speed by around 50-100 or so, and rarely...something wrong!

Of course if another problem exists, adding intake airflow can aggravate it. I just want to know.

I suppose there could be a couple of bent valves from torquing the head down with the cam out of time a bit, but a leakdown test catches that easily.

>>>*The gentleman's email came in first with the same heading. I doubt he means anything by it.

It doesn't bother me any, I can't keep cams in my building anyway. I have 200 on back order right now and had to quit listing until I get restock.

The simple fact IS that any cam change combined with other additions certainly CAN equal problems, we have no choice but to design from a bone stock application, of course.

So I want a solution, just trying to help, figure out what is going on. I am way behind a lot of you folks on tuning problems, thus I suggested the gentleman post his concerns here so my peers can offer help.

Since the vast majority of users report nice results, I need to know what is different here.

That is why I personally bumped this thread, I could have just let it go off into cyberland and forgot it.

I think that what is going on is a combination of additions, these engines are sensitive to changes. The 261C is so close to the Comp Cams 260 that some mistake it, not noticing the nose design for quieter operation and the fatter ramps. The profile is simple and will normally have zero detrimental effect on the way the engine runs, simply adding air flow potential for some power gains.

Yet some report a chattery idle, some report smooth as silk, some report a need to bump up the idle speed by around 50-100 or so, and rarely...something wrong!

Of course if another problem exists, adding intake airflow can aggravate it. I just want to know.

*But I do have one suggestion for a possible test. If the current lash setting is our suggested minimum of .007" intake and .009" exhaust, then open up the valve lash to stock .008" intake and .012" exhaust. This effectively shortens the exhaust duration by a surprisng amount and makes it tougher for the exhaust to overscavenge which the very free flowing LCE header can do. The design runs noisier there but that is harmless.......*EB

However my question is, if you are willing to reveal it, is what is your lobe separation angle? This can affect a camshaft greatly on EFI.

I've been using this cam for about 2 years and love the combo of gas mileage and low end torque. Here is what I have found after a couple years of tinkering..

It does not want to be at 750 rpm. Sometimes I go as high as 1000, but can get by with 900. Depends on how hard I run my alternator as to how I adjust my idle. This is with a brand new head from EB and a low end at 30 over as in my title.

I do find myself tinkering with the idle from season to season honestly, but I'm sold on the torque. For in town and interstate driving at about 3K it is perfect IMO. I've managed to pull almost 25 mpg on some trips where I've been between 55 and 60.