Building an LS2 402...(RUNNING with Video)
Not yet, been working on the tune myself, as far as the normal drivability of it. I may get it on a dyno this fall for a WOT tune.
I am in the middle of putting my 9" back in it right now. I have a new heavy duty aluminum drive shaft going in as well. I plan on taking it to LS Fest in a couple weeks. Not sure if I will get a chance to get it on the strip or not, may just do the Autocross. I can't go until Sunday which is the elimination day.
The car blows the tires off mid way threw third gear, that's with 315/35 17 Nitto NT555 Extreme street tires on it. I am getting the car setup so that when I do put drag radials on it, I don't break anything.
I think the Torsen posi in the 10 bolt is on its way out anyway, when I pulled the rear end I noticed the torsen is almost locked up, it should spin free like an open diff and lock when under a heavy load, mine is almost locked all the time....LOL
Oh, and I did swap my lifters out to Brians SLR lifters, way quieter at idle now.
I am in the middle of putting my 9" back in it right now. I have a new heavy duty aluminum drive shaft going in as well. I plan on taking it to LS Fest in a couple weeks. Not sure if I will get a chance to get it on the strip or not, may just do the Autocross. I can't go until Sunday which is the elimination day.
The car blows the tires off mid way threw third gear, that's with 315/35 17 Nitto NT555 Extreme street tires on it. I am getting the car setup so that when I do put drag radials on it, I don't break anything.
I think the Torsen posi in the 10 bolt is on its way out anyway, when I pulled the rear end I noticed the torsen is almost locked up, it should spin free like an open diff and lock when under a heavy load, mine is almost locked all the time....LOL
Oh, and I did swap my lifters out to Brians SLR lifters, way quieter at idle now.
TECH Senior Member
Joined: Jul 2009
Posts: 8,034
Likes: 663
What were your original lifters? Cam lobes and any videos of before vs.after BTR SLR lifters? Its good to hear the SLR lifters are are a viable option. What kind of RPMs are you spinning it too?
The problem is the heavy springs, stock lifters were never meant to handle these high spring pressures. When the oil gets hot and thins out they start to bleed down, under all the pressure.
Car is ready for LS Fest, I cut my mid pipe muffler out, car just sounds nasty now. I am not going to be able to get it on the strip because I do not have any drag radials. My 9 inch is back in the car and I have a custom made heavy duty aluminum drive shaft.
The tune is pretty much done as well. I plan on getting another set of back wheels and a set of 315/35-17 Hoosier Drag Radials then I will get some times.
I made a quick video of what the car sounds like now. The valve train is quiet. The little rattle/ticking you hear in the video is the PCV valve in my catch can.
The tune is pretty much done as well. I plan on getting another set of back wheels and a set of 315/35-17 Hoosier Drag Radials then I will get some times.
I made a quick video of what the car sounds like now. The valve train is quiet. The little rattle/ticking you hear in the video is the PCV valve in my catch can.
that sounds great! and looks so clean, did I read you have a 54-600-11 comps cam? I have the same cam for my 5.3 carb swap, also did you just use the procomp coil relocation bracket? if so did you have to drill and tap holes in the valve cover? thanks
I have a custom ground cam, and the valve covers came predrilled and tapped for the coil brackets.
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Man i would love to know what your car layed down! I hope my LS7's dont do that bc thats what is going in there. However, PURPOSELY didnt go with an XER lobe bc of the aggressive ramp rates. I have a custom grind from EPS with their lobes for a much smoother transition.
Car is doing great, just been driving it to tell you the truth. I tuned it myself just driving around on the street. When I get it on the dyno, one of these days, I will update the thread.
TECH Resident
Joined: Jan 2007
Posts: 751
Likes: 0
From: Texas
Had the LS7's in it, XFI intake, XER exhaust. Not real aggressive lobes. The car would develop a loud lifter tick ,at idle, after it got good and hot. The only 2 videos I have are the ones in this thread. You cant really hear it in the garage, plus it wasn't fully hot either. They also didn't get loud until after I drove it and got the oil temps up. Rev limit is set to 7000 RPM right now with the SLR's in it. Lifter tick is gone.
The problem is the heavy springs, stock lifters were never meant to handle these high spring pressures. When the oil gets hot and thins out they start to bleed down, under all the pressure.
The problem is the heavy springs, stock lifters were never meant to handle these high spring pressures. When the oil gets hot and thins out they start to bleed down, under all the pressure.
Interesting and seemingly obvious in hindsight the LS7 lifters were over-sprung since they were designed for less aggressive oem application. Even though LS7 has 7k redline with over-run I wonder where the boundaries are for spring pressure/lift? I will definitely keep this in mind for upcoming changes.
