I recently put some 26g's in my 95" motor when i had some spare time. Install went smooth, got the kit from American Classic off ebay for $520 shipped. Re-used my lifters as they only had 10k on it. Butt dyno definitely likes the improvement. My auto tune trims have more fuel desired in most RPM ranges, which was to be expected. The change to the exhaust note was quite drastic, it sounds like different mufflers alltogether.


My question is this, I seem to have the infamous top end noise when it gets warm. I have read alot of reports about it, but never seen exactly what the cause is. Mine sounds just like this one when its hot: (This vid was originally posted by XXXFLHRCI)

https://www.hdforums.com/forum/4827603-post23.html

It doesnt really bother me after reading that it is very common when using these cams, but I am wondering if anyone has successfully found out the cause? It almost sounds like metal to metal in the front rocker box to me. I will pull the rocker cover soon just to make sure there is no rubbing.

 

Mine sounds like that also. Maybe not quite that bad, but alot more noise than stock. How much lift do the 26g's have? I think stock cams have .480 lift and my 255's have a .550. Plus I think my cams close quick so its really letting the valves slam shut. I have gotten used to it now but it really worried me at first.

 

Glad you got her running.

Most engine builders would have advised you to replace the lifters when you replace the cam.
You may have a lifter that is not pumping up.

 

The builders I talked to advised me not to replace the lifters except possibly in high-mileage bikes. I had 25k at the time and reused the originals, my opinion being that these exact lifters survive in Chevrolets for 100K's of miles and it's rare to hear of problems with them. One of these builders works on mostly antique and racing car and boat engines and when he performed a big-bore upgrade with a cam change on his 2000 EGC at 60k he reused the lifters.

 

Andrews cams are notorious for increasing noise, but not as bad as in the past. The reason is that most of their cams have steep open and close ramps that slam the valve open and shut more rapidly, not to mention the increase in lift. This always gave them a performance edge, especially in retaining low-end and midrange TQ better than most, but obviously increased complaints about noise. The noise in the video doesn't alarm me at all and is quiet compared to my old Evo with an Andrews EV13 installed, and you should've heard a friend's Evo with an Andrews EV27! It sounded like turbocharged Rice Krispies in the engine.

I have the 255's in a similar configuration as WhiteDogg but contrary to my expectations I have hardly any increase in top-end noise. Keep in mind that my hearing is below-par, but when I asked some friends if they could hear any difference in mine vs. their stock '08 and '09 cams and they said there was a difference but only very slight. I could hear the difference but it was more a tonal difference than loudness to me. In the case of the 255's the lift is much higher than stock and the TW26, but I assume the ramps are less aggressive.

What I do hear is increased exhaust noise, and I ended up replacing the Jackpot 2" right baffle with a 1.75". That didn't quieten it back up like before but helped a bit. It has an aggressive, harder-hitting sound than stock both to me and friends--and in some ways I like it just fine . In other ways not . As I said I did expect this and have no room to complain, especially considering all the positive qualities of this cam change, which far overwhelm the negative.

I wouldn't bother checking the rocker area, as I doubt if your noise is abnormal based on the video and your statement that yours is not quiet that noisy. My old Evo had a front-exhaust-valve click that was much louder than the rest, and I never figured it out and just lived with it. I changed the lifter and re-adjusted the pushrods several times to no avail and finally just learned to like it. The new bike has no bias from one valve to the next that I can hear and all of them have the same intensity to my impoverished ears.

 

Thanks for all the info. I'm gonna ride it and turn the radio up another notch, hah. It's really not that bad, just a little alarming. I think you listen way more intently after putting a motor back together anyhow. It certainly wasn't silent before.

 

What's the oil pressure doing?

After my 95/26G upgrade, I didn't like what the oil was doing (I left off the front rocker cover and watched what the oil was doing - not very aggressive), went with the Fueling Oil Pump, had oil squirting everywhere - much better.

IMO, I think anything done to increase CI (88 to 95, etc.) requires a higher flowing oil pump. Also, you might consider pressure reliefs on the heads - higher compression will make for harder starting in hot weather.

 

Did you reuse the stock pushrods or did you change to adjustables? Reason I'm asking is I did a 26H install on my '07 and have increased noise as well. Some say the stock rods help keep it quiet. Just wondering about your setup.

 

i used the stockers. in regards to the previous question, my oil pressure is the same as before, 32psi cold and at cruise rpm, around 8-10psi hot idle. i guess these are just noisy cams.

 

I got the 26g's in my EG with 95bb and its as quiet as it was stock, had the 37's also and they were quiet also, are you using the gears and if so did you check the runout before installing?

Ron