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My point was, and is, they look to be heavier on the nose than OEM, and if I was going to go with a heavier nosed rocker, I'd go with a roller. I'm sure the BTR rockers are lighter than a roller nose. But that wasn't my point.
So is shimming up the stand the answer they gave you?
Didn’t get a real clear answer.
I ended up putting .050 shims and the rockers now they clear and also moved the wipe to the center of the valve. No shims I was slightly off center of the valve.
BTR exchanged my V1 kit for their V2 kit. Since I received more bushings I’m going to press them into a stock rocker and see if I can get away with running the stock rockers and no shims as long as the wipe pattern stays where it should be.
Hopefully Summit will allow me to return them since they aren’t working without a shim.
This is a bit of an old thread I'm resurrecting, but I wanted to add to it since it flagged for me to check the rocker to retainer clearance on a similar setup. I have Texas Speed as-cast 225cc heads, with PAC 660 springs and titanium lifters, BTR shaft rockers with BTR rocker arms.
Pictures are worth quite a lot of words, but in closing I was able to measure 0.040"-0.050" of clearance between the rocker and retainer on a fully closed valve using playdough. Talking to BTR, the clearance is roughly what they'd look for. I inquired about shimming the rocker assembly if additional clearance is needed and if the wipe pattern was off, but was advised against it, at least with BTR rocker arms since wipe area of the nose is greater than stock.
In addition the clearance should only get larger as the rocker arm moves through it's travel. I have yet to check that since the heads are off the block and I need to get correct push rods.
This is a bit of an old thread I'm resurrecting, but I wanted to add to it since it flagged for me to check the rocker to retainer clearance on a similar setup. I have Texas Speed as-cast 225cc heads, with PAC 660 springs and titanium lifters, BTR shaft rockers with BTR rocker arms.
Pictures are worth quite a lot of words, but in closing I was able to measure 0.040"-0.050" of clearance between the rocker and retainer on a fully closed valve using playdough. Talking to BTR, the clearance is roughly what they'd look for. I inquired about shimming the rocker assembly if additional clearance is needed and if the wipe pattern was off, but was advised against it, at least with BTR rocker arms since wipe area of the nose is greater than stock.
In addition the clearance should only get larger as the rocker arm moves through it's travel. I have yet to check that since the heads are off the block and I need to get correct push rods.
Figured I’d pop back in and update this thread should anyone have similar issues. I switched to BTR valve springs and I now have plenty of clearance with no shims.
03-06-2023, 12:21 PM
