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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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anti-rotation, cams, screws, tappets

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  #11  
Old 19th June 2013
~Grind~ ~Grind~ is offline
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Originally Posted by hairy View Post
this makes me worried about my new build.
hammer sent me h.d lifters for my crush 600 cams, I hope I don't have any problems.
I'm pretty certain they have you covered. Shoot Aaron an email and see what he says.
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  #12  
Old 19th June 2013
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don't know if id run that lifter or not nores xl has killed 2 sets I think id spend the money and get some jims but buy the look of thoughs pins Id say they hit the lifter. side to side on the roller is ok its up and down you worry about but did your pins have wear to begin with and allow it to move.? and look at the top of the lifter cover make sure they don't hit.
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Old 19th June 2013
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Quote:
Originally Posted by groovemeisterus View Post
Are you referring to oversized lifters and bore? Similar to next oversized sized pistons in the jugs?
I've saw tappet blocks so bad, they send the lifter right and left. In a high performance motor, the lifter or tappet block get overlook often. Just make sure you check them. S&S sell high performance tappet block. Just imagine the wear they suffer just looking at your antirotation pins.
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  #14  
Old 20th June 2013
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Quote:
. Sometimes, when engine starts to make that noise(almost embarrassing), like described, and I come to a stop light after a long ride, engine idle will be higher, and will have to adjust idle on the fly, then several more miles, when have to stop at another light, idle might be too low, and then have to re-adjust. Not always, but another symptom.

Cold starts are fine, and runs decent when cool, but after engine gets HOT, here comes the noise.
I have these exact same symptoms as of late.

Running Andrews V4 cams.

Been running it pretty hard since break-in of the conversion.

Going to put in some Jim's Powerglides.
Already have the S&S tappet blocks.
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  #15  
Old 20th June 2013
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Originally Posted by ~Grind~ View Post
Do you think the lifters collapsing would cause the damage to the anti-rotation pins?

Would you post pictures of the lifters please?
That i'm not to sure on. I'll post some picts tomorrow when I get the chance. There is wear I did see. Need to try and get some picts from the lifter tubes themselves also.
But as my knoweldge goes on lifters, when they collapse, pressure is lost on the pushrod, which causes the valves (via valve springs), to slap back, which which cause some wierd valvtrain movements etc. I'm just now learning and getting up to speed on lifters. Never thought a lifter could effect the engine like this. But i'm slowly learning that it does.

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  #16  
Old 20th June 2013
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Quote:
Originally Posted by Bob s hog View Post
don't know if id run that lifter or not nores xl has killed 2 sets I think id spend the money and get some jims but buy the look of thoughs pins Id say they hit the lifter. side to side on the roller is ok its up and down you worry about but did your pins have wear to begin with and allow it to move.? and look at the top of the lifter cover make sure they don't hit.
There was never any wear on the pins when first installed S&S lifters about 4 years ago.

Bob woods gave me a number to a sportster expert, and he uses the Feuling lifters on all his sportster engine builds and never had any problems with them. HOT builds, 88" 90", etc, and running above .600" lift cams. can't remember exact lift, .65 or higher maybe, but no issues he's ever had with those lifters is the main thing i got.

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  #17  
Old 20th June 2013
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Quote:
Originally Posted by rejeanprimeau View Post
I've saw tappet blocks so bad, they send the lifter right and left. In a high performance motor, the lifter or tappet block get overlook often. Just make sure you check them. S&S sell high performance tappet block. Just imagine the wear they suffer just looking at your antirotation pins.
Very true on overlooked often. I'd never even thought could be lifter issue. But now i'm learning about lifters now, since never even thought they could go bad, or wear out the lifter bore and make it larger. Good stuff to know.

Thanks

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  #18  
Old 20th June 2013
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Quote:
Originally Posted by 90sportster View Post
I have these exact same symptoms as of late.

Running Andrews V4 cams.

Been running it pretty hard since break-in of the conversion.

Going to put in some Jim's Powerglides.
Already have the S&S tappet blocks.
Good to know others out there are experiencing the same symptoms. As stated before, all was good, but like any custom rodded engine, wear and tear happens when ya run them hard. I'm gonna look into them tappet blocks and see what there all about, what they do, and how to install. From first looks, seems like need to bore tappet holes, then place the tappet blocks? Again, these tappet issues are all new to me.

Thanks for your feedback!

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  #19  
Old 24th June 2013
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Post Lifter Picts

Here's a shot of my lifter's as asked for. I put the feuling lifters in already, and have only experienced somewhat of a very slight noticeable similarity. Valve train sounds normal for cams, but has not yet got HOT enough to make the same similar noise, and idle offset ect as the last S&S lifters did. Need some longer rides and hotter temps to be for sure.

I am running SE -0.50" push rods though. I am curious though if that would be a significant factor of being short by that much. Used those for extra protection of valve to piston contact.

Again not sure, but hate to have to use adjustable push rods, but wonder if that much difference, after engine is up to optimum operating temp, if valve train could be thrown off.

Can def see wear on the lifters in the following pict...

[IMG][/IMG]

Thanks again for any feedback.

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  #20  
Old 24th June 2013
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Originally Posted by groovemeisterus View Post
I am running SE -0.50" push rods though. I am curious though if that would be a significant factor of being short by that much. Used those for extra protection of valve to piston contact.
Pushrod length doesn't change piston to valve clearance.
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