Anyone using LSr cam 265lr hr12
08-18-2014, 09:14 PM
#21
Thanks for updating the thread. I'll have to double check my pushrod length. I bought my stuff as a kit and got everything needed for the heads/cam swap including 7.4" pushrods. Luckily they also sent a length checker. Keep updating with any changes and the results! Vids are absolutely mandatory as well.
08-19-2014, 05:14 AM
#22
Thanks for updating the thread. I'll have to double check my pushrod length. I bought my stuff as a kit and got everything needed for the heads/cam swap including 7.4" pushrods. Luckily they also sent a length checker. Keep updating with any changes and the results! Vids are absolutely mandatory as well.
7.4 pushrods are definitely to short. My valvetrain was very noisy with them but at the time I didn't have anything else.
I have 7.425's in there now and I still think it's to noisy.
Mac,
How much preload did you end up with? As for the tune, it REALLY depends on how the tuner tunes it and how aggressive he/she is with it.
Even for me, after I got my truck tuned, I went out and bought HP Tuners, did a crap ton of reading and still was able to improve over the tune that was done.
08-20-2014, 07:52 PM
#23
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Thanks for the update(s).
7.4 pushrods are definitely to short. My valvetrain was very noisy with them but at the time I didn't have anything else.
I have 7.425's in there now and I still think it's to noisy.
Mac,
How much preload did you end up with? As for the tune, it REALLY depends on how the tuner tunes it and how aggressive he/she is with it.
Even for me, after I got my truck tuned, I went out and bought HP Tuners, did a crap ton of reading and still was able to improve over the tune that was done.
7.4 pushrods are definitely to short. My valvetrain was very noisy with them but at the time I didn't have anything else.
I have 7.425's in there now and I still think it's to noisy.
Mac,
How much preload did you end up with? As for the tune, it REALLY depends on how the tuner tunes it and how aggressive he/she is with it.
Even for me, after I got my truck tuned, I went out and bought HP Tuners, did a crap ton of reading and still was able to improve over the tune that was done.
What idle rpm do you have with your current tune?
Last edited by Mactech; 08-20-2014 at 08:12 PM.
08-23-2014, 12:34 PM
#24
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08-26-2014, 04:17 AM
#25
Mac,
Mine is 625 after it's warmed up.
FWIW,
I've been chasing a noisy valvetrain since I put the cam in some time ago. At the time of the install, all I had was 7.4 PR's and it was noisy as hell.
I then went to 7.425's and those have been in for quite some time. I've pulled the covers off numerous times to check the torque of the rockers and they were all right but I still felt it was to noisey.
Yesterday, I put 7.450's in and torqued them down to 22ft-lb and let me tell you, that valvetrain is whisper quiet. All you can hear now is the injectors cycling.
Despite what the PR checker comes out to be, listen to the valvetrain. The longer pushrod doesn't change the lift on these trucks, all it changes is the preload at the lifter.
08-26-2014, 08:44 AM
#26
Mac,
Mine is 625 after it's warmed up.
FWIW,
I've been chasing a noisy valvetrain since I put the cam in some time ago. At the time of the install, all I had was 7.4 PR's and it was noisy as hell.
I then went to 7.425's and those have been in for quite some time. I've pulled the covers off numerous times to check the torque of the rockers and they were all right but I still felt it was to noisey.
Yesterday, I put 7.450's in and torqued them down to 22ft-lb and let me tell you, that valvetrain is whisper quiet. All you can hear now is the injectors cycling.
Despite what the PR checker comes out to be, listen to the valvetrain. The longer pushrod doesn't change the lift on these trucks, all it changes is the preload at the lifter.
Mine is 625 after it's warmed up.
FWIW,
I've been chasing a noisy valvetrain since I put the cam in some time ago. At the time of the install, all I had was 7.4 PR's and it was noisy as hell.
I then went to 7.425's and those have been in for quite some time. I've pulled the covers off numerous times to check the torque of the rockers and they were all right but I still felt it was to noisey.
Yesterday, I put 7.450's in and torqued them down to 22ft-lb and let me tell you, that valvetrain is whisper quiet. All you can hear now is the injectors cycling.
Despite what the PR checker comes out to be, listen to the valvetrain. The longer pushrod doesn't change the lift on these trucks, all it changes is the preload at the lifter.
08-26-2014, 06:19 PM
#28
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Mac,
Mine is 625 after it's warmed up.
FWIW,
I've been chasing a noisy valvetrain since I put the cam in some time ago. At the time of the install, all I had was 7.4 PR's and it was noisy as hell.
I then went to 7.425's and those have been in for quite some time. I've pulled the covers off numerous times to check the torque of the rockers and they were all right but I still felt it was to noisey.
Yesterday, I put 7.450's in and torqued them down to 22ft-lb and let me tell you, that valvetrain is whisper quiet. All you can hear now is the injectors cycling.
Despite what the PR checker comes out to be, listen to the valvetrain. The longer pushrod doesn't change the lift on these trucks, all it changes is the preload at the lifter.
Mine is 625 after it's warmed up.
FWIW,
I've been chasing a noisy valvetrain since I put the cam in some time ago. At the time of the install, all I had was 7.4 PR's and it was noisy as hell.
I then went to 7.425's and those have been in for quite some time. I've pulled the covers off numerous times to check the torque of the rockers and they were all right but I still felt it was to noisey.
Yesterday, I put 7.450's in and torqued them down to 22ft-lb and let me tell you, that valvetrain is whisper quiet. All you can hear now is the injectors cycling.
Despite what the PR checker comes out to be, listen to the valvetrain. The longer pushrod doesn't change the lift on these trucks, all it changes is the preload at the lifter.
Where did you buy those pushrods?