Max lift for 100K mile longevity
05-25-2013, 11:04 AM
#45
TECH Senior Member
05-23-2015, 08:36 AM
#48
Always let the engine fully warm up My heads & cam set up with a Comp Cams XE-R 224/224 with .581 lift has over 104,000+ miles on it since being installed. Car has 136,xxx miles total. Has Comp Cams 987 dual valve springs replaced once with 60, xxx miles of use. All springs were intact. Will probably do 987's again soon and replace locks, retainers, rockers etc too. I always have kept the rpm under 2500 until fully warmed up. Oil pressure drops to normal & water is at normal for about ten minutes.
Last edited by 99 Black Bird T/A; 05-23-2015 at 11:43 AM.
05-25-2015, 08:12 PM
#51
TECH Veteran
05-26-2015, 08:11 AM
#52
This is a very timely revival of this thread, as I just got my project on the road for the first time yesterday.
I went with the lunati voodoo 217/223 cam. I have only gotten into it a couple times because I am still working on the tune but it runs really good.
Time will tell on valvesprings, when I get the project done enough that I can put some real miles on it, I am going to invest in a valve spring pressure gauge and a height micrometer so I can replace springs and shim them to correct height.
I went with the lunati voodoo 217/223 cam. I have only gotten into it a couple times because I am still working on the tune but it runs really good.
Time will tell on valvesprings, when I get the project done enough that I can put some real miles on it, I am going to invest in a valve spring pressure gauge and a height micrometer so I can replace springs and shim them to correct height.
05-26-2015, 10:59 AM
#53
This is a very timely revival of this thread, as I just got my project on the road for the first time yesterday.
I went with the lunati voodoo 217/223 cam. I have only gotten into it a couple times because I am still working on the tune but it runs really good.
Time will tell on valvesprings, when I get the project done enough that I can put some real miles on it, I am going to invest in a valve spring pressure gauge and a height micrometer so I can replace springs and shim them to correct height.
I went with the lunati voodoo 217/223 cam. I have only gotten into it a couple times because I am still working on the tune but it runs really good.
Time will tell on valvesprings, when I get the project done enough that I can put some real miles on it, I am going to invest in a valve spring pressure gauge and a height micrometer so I can replace springs and shim them to correct height.
06-03-2015, 07:28 AM
#54
Collapsed a lifter Have you seen the Moroso Valve Seat Pressure Tester ? I think it's part# is 62390 ? It's the one I'm thinking of getting but it looks like it only tests closed pressure. Seems like pressure at the users peak valve lift is the number needed. Sorry I can't link; it's sold by non-sponsors.
I have already had a problem with my setup. I was out dialing in the tune last night, and once I had the VE close enough that it wasn't overly rich or lean anywhere I decided to stand on it. I did a rolling burnout in second gear from an idle, it hit the fuel shutoff at 6400 for a second or 2 until I backed off the throttle enough to keep it off the limiter, I held it just under the fuel shutoff (6300) until ground speed was close to wheel speed then shifted to third. When it stopped spinning in third, I shifted to 6th to just coast and it started the clackity-clackity-clack. I limped it home and pulled the valve covers, one lifter is completely collapsed.
These where stock lq4 lifters of unknown mileage and condition.
So, I plan to pull the heads and install new 12499225 lifters along with PAC 1218 springs. Last time I read up on it, it was a good idea to shim the springs to within .050" of coil bind. Is this still the best bet? Also, I assume I would just use the manufacturer's listed coil bind length, I wouldn't actually try to check coil bind length on the springs right?
