Since your noice level decreased with lighter sping rates I too suspect your lifters. I always change lifters when I change the cams. The rollers will wear into your cams then you change cams and you have uneven surfaces. I too would install new lifters.

 

i think its the lifters as well , 195/490 is too much for a hydraulic lifter to handle , im going to get a set of comp cams high rev anti pump up lifters to try cure the rest of the valvetrain noise....

 

Well whoever you get them from, and or end up with, I am convinced the stock or stock type lifter (SB Chevy Eaton design I believe) is not good enough for even stock HD engines.

 

Have you spoken to CompCams about these lifters? Did they mention what they thought was the max. pressure allowable before the lifter will collapse?

Looking at the Woods website, his valve-springs @ 1.200" are only at 430/450 lbs. respectively. Has anyone heard how much spring pressure the Woods lifters can handle?

Funny thing is I'm currently in a discussion on one of the Turbo Buick boards discussing the same thing... Running Chevy retro. roller lifters...


K.

 

Old Gunny i agree 100 %

i have not talked to them , but i have a good friend that has built more race engines than i can count helping me with this issue and his first thought was to take some valve spring out of it because no hydraulic lifter can handle those pressures and what do you know the noise is at least 50% better , now he says get some anti pump up lifters and what do you think im going to do....
i do know that the earlier Z06 corvettes with heavier stainless valves would rev to 7000 with a hydraulic lifter and only have 100 lbs on the seat , just a thought..

 

Running the same SE springs 195/520lbs SE pn# 18281-02a with stock lifters and roller rockers but I am running a SE 251 camset and it is a little noisier than stock it's not too bad at all.

 

Give TR a call, see what he recommends. As I have installed the 625 and would not say it had excessive valve train noise what so ever.

 

Guys you really have to consider Woods new lifters, and also Headquaters.

I know for a fact they made my Woods 7H quiet. so I then but in a Woods 400-6.
they are quiet everywhere.

They have made riding so much better. didn't really how much I was always worrying about that clickity clanking going on.

The engine at 3000 RPM and about 85 MPH even has a humming sound as all work together now.

And I agree about the valve springs. This engine was originally set up for a Woods 400 so the springs were stout from the git go. What every Bob Woods has in the inside of these new lifters works. When I first got them I was thinking about taking a look but then I figured, they either do or they don't. They do.

 

Troy

Years ago I but Comp Cam 292 Magnum cam in a 77 Corvette. Pretty hot street cam. It was overkill really. Ended up even with transmission converter stall speed fiddled with to be hell to idle right. Wouldn't idle below 1200--, bummer. Just wouldn't run hardly.

so to help out I put in

"Rhoads Leak Down" lifters. Flat tappet days. These things worked. Took out, at idle, about 0.035 lift and a little duration below 3000 RPM. Sounded like the hammers of hell at idle though leaking down. Doing what they were designed to do.

Sounded like my 08 Fatboy a lot. Through out the RPM range though. I have been thinking about that a lot last couple years, when I got back into Harleys after the usual story.

The point--
I do not remember the spring pressure but the valve lift was 0.500. Just a little old 0.500, not too much right? I used their springs more that likely.

Harly stock cams are right there and performance cams blow by that a whole bunch.

Think about that. Secrete is the lifters.
They have been inadaquate for Harleys for years.

 

i just got done putting the tman 625 cams back in and went for a ride and unfortunately the ticking is as bad as ever , so after all this work , cam swaps, spring swaps , clearancing , ect .... im going to break down and order some lifters....