Project: No Experience
Jun 5, 2016 | 11:46 AM
#3
Jun 5, 2016 | 03:23 PM
#6
Thread Starter
Mod with training wheels
iTrader: (16)
Joined: Feb 2009
Posts: 7,741
Likes: 207
From: Detroit
Here's the most exciting video yet...
Just another experiment, as usual. Currently has a bone stock LQ4, 4L85e...turbos are 67.7mm, 6psi so far. I'm doing everything within my power myself this time. Turbo kit, transmission, suspension, rear end, etc... I don't trust any machinists to work a block/crank, and I don't have that kind of equipment, so I will be sourcing an engine from GM when the time comes. Working in Detroit has its perks...GMPP engines can be had for extremely cheap. Goal is to touch 4 digit power on the LQ4 camshaft and valvetrain, and then max out the turbos with the LSX. Borg rates them at 1000hp each; we'll see where they tap out. Figuring 1600whp is a reasonable goal, enough to get a 4wd into the 8s if I can drive it... Shout out to Kyle Brown for hooking me up with the turbochargers. 4WD RCSBs are pretty played out now, in fact I think that twin turbo 5.0 F150 in the project section is way more badass than my pile... But its something to experiment on.
Just another experiment, as usual. Currently has a bone stock LQ4, 4L85e...turbos are 67.7mm, 6psi so far. I'm doing everything within my power myself this time. Turbo kit, transmission, suspension, rear end, etc... I don't trust any machinists to work a block/crank, and I don't have that kind of equipment, so I will be sourcing an engine from GM when the time comes. Working in Detroit has its perks...GMPP engines can be had for extremely cheap. Goal is to touch 4 digit power on the LQ4 camshaft and valvetrain, and then max out the turbos with the LSX. Borg rates them at 1000hp each; we'll see where they tap out. Figuring 1600whp is a reasonable goal, enough to get a 4wd into the 8s if I can drive it... Shout out to Kyle Brown for hooking me up with the turbochargers. 4WD RCSBs are pretty played out now, in fact I think that twin turbo 5.0 F150 in the project section is way more badass than my pile... But its something to experiment on.
Last edited by smokeshow; Jun 5, 2016 at 03:28 PM.
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Jun 6, 2016 | 07:36 AM
#9
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Mod with training wheels
iTrader: (16)
Joined: Feb 2009
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From: Detroit
That's all of the details, everything there is to know lol. I did do some testing with the truetrac this weekend. My neighbor said I was doing a burnout down the street while he was walking his dog, and smoking only one tire. I call bullshit, since I don't drive like a jackass in neighborhoods, but ShredSled up here says his truetrac does some funky stuff too and prompted me to do some testing.
My go-to method for testing the torsen style diff in Arizona was to place one tire on dirt and one on the pavement and just drop the hammer and make sure the pavement tire spins. Using that same method here, I get the same results. However Michigan has this stuff called grass, and the truetrac doesn't like it. One tire on grass, other on pavement, and I don't get really any torque sent to the pavement wheel at all...just a loud whining sound from the rear end. Changed fluid, made sure it was conventional dead dinosaur fluid with no additives, and same result. Just rear end whine and spins the tire on the grass like an open diff. Put both tires on the pavement though, and it works just fine...
Has anyone come across any information regarding a maximum friction coefficient difference between tires for a truetrac to operate? Damp grass isn't providing enough resistance to allow the helical gears to thrust sufficiently to transfer torque, it seems to me.
My go-to method for testing the torsen style diff in Arizona was to place one tire on dirt and one on the pavement and just drop the hammer and make sure the pavement tire spins. Using that same method here, I get the same results. However Michigan has this stuff called grass, and the truetrac doesn't like it. One tire on grass, other on pavement, and I don't get really any torque sent to the pavement wheel at all...just a loud whining sound from the rear end. Changed fluid, made sure it was conventional dead dinosaur fluid with no additives, and same result. Just rear end whine and spins the tire on the grass like an open diff. Put both tires on the pavement though, and it works just fine...
Has anyone come across any information regarding a maximum friction coefficient difference between tires for a truetrac to operate? Damp grass isn't providing enough resistance to allow the helical gears to thrust sufficiently to transfer torque, it seems to me.
Jun 6, 2016 | 08:37 AM
#10
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However Michigan has this stuff called grass, and the truetrac doesn't like it. One tire on grass, other on pavement, and I don't get really any torque sent to the pavement wheel at all...just a loud whining sound from the rear end. Changed fluid, made sure it was conventional dead dinosaur fluid with no additives, and same result. Just rear end whine and spins the tire on the grass like an open diff. Put both tires on the pavement though, and it works just fine...
Has anyone come across any information regarding a maximum friction coefficient difference between tires for a truetrac to operate? Damp grass isn't providing enough resistance to allow the helical gears to thrust sufficiently to transfer torque, it seems to me.
Has anyone come across any information regarding a maximum friction coefficient difference between tires for a truetrac to operate? Damp grass isn't providing enough resistance to allow the helical gears to thrust sufficiently to transfer torque, it seems to me.