ctuinstra
Goblin Guru
As you know, keep 10% of the total weight on the tongue and they tow the best. I see so many trailers loaded wrong and some people have now clue.
James's Extended Track Goblin - 06 LS donor
- Thread starter jamesm
- Start date
jamesm
Goblin Guru
Thanks. The only REALLY tight spot is getting the front wheels past the cables on the gate. I was looking at the heim joints on the front and it looks like I can tighten them up a touch to get a little clearance.
No doubt. I’ve seen some horrible piles on trailers. Sometimes it’s small changes too. When I had issues, we only moved the car like 6” more forward and it smoothed it out. I was really surprised that it was that sensitive.
ctuinstra
Goblin Guru
Exactly!. When I haul my 4000lbs tractor with loader, etc. I can tell the difference between inches of where it is on the trailer.
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jamesm
Goblin Guru
A few pictures from yesterday's autocross:
And videos of my runs:
1:
2:
3:
4:
5: https://youtu.be/Z8qRjGBbHwI
6: https://youtu.be/1Q0Y9ipU1iQ
Fun run: https://youtu.be/84KmZBvVS1o
Last fun run (and fasted time): https://youtu.be/swGIBfDZXMQ
And videos of my runs:
1:
6: https://youtu.be/1Q0Y9ipU1iQ
Fun run: https://youtu.be/84KmZBvVS1o
Last fun run (and fasted time): https://youtu.be/swGIBfDZXMQ
jamesm
Goblin Guru
Heh. Part of the wonky overlays is my go-pro being dumb. Half the time it doesn't even capture GPS tracking even though it's mounted where it has clear access to the sky and I turn it on in plenty of time to acquire a signal.
That track definitely could have used more cones but I know it's a pain to set them all up and tear it down. Both of my DNFs were due to me missing gates. I also need to walk the course more. I did it a couple of times but there were other folks walking with me giving me pointers.
That track definitely could have used more cones but I know it's a pain to set them all up and tear it down. Both of my DNFs were due to me missing gates. I also need to walk the course more. I did it a couple of times but there were other folks walking with me giving me pointers.
JBINTX
Goblin Guru
Sticky rubber makes ALL the difference!!!
Give us a report after the next autoX.
jamesm
Goblin Guru
Will do. JERMzSS is going to be at the next event so I’m hoping to learn a lot from him too.
Towerdog
Goblin Guru
When I was buying fuel line the auto parts guy asked me what I was building and he know what it was due to Demolition Ranch.Got the new tires mounted and installed. One of the guys at the tire shop asked me what they went on. He got excited when I told him a Goblin. He'd seen them on youtube.
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They are definitely sticky
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Waterdriver
Goblin Guru
What camber are you running front and rear? I have the 15in version of your tire and I've experienced that -1.8 front and -1.5 rear camber has been too aggressive.Got the new tires mounted and installed. One of the guys at the tire shop asked me what they went on. He got excited when I told him a Goblin. He'd seen them on youtube.
View attachment 24655View attachment 24653
They are definitely sticky
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When you go autocross, tire crayon or shoe polish dab a spot on the outside shoulder of each tire before a run in this area of the tire.
It can help identify if camber and tire pressures are close to optimal.
Curious to see how your tires work out for you.
TravMac
Well-Known Member
Where did you go through to get em? I just tried ordering some through tire rack and they told me backorder for the next few months... seems like a lot of places are on back order for stuff
jamesm
Goblin Guru
I had the Sumitomo's at about 1.2°. I originally had them at 1.5 but it was too much. The outside tread never touched the ground.
I need to read up a little more on tire pressures. I see some folks running lower pressures, and some running higher. I have a small air compressor in my trailer so my plan right now is to make a couple runs, then adjust one way and see how it does. I know there's some basic physics that I can learn from reading but until I actually try it, I won't really know what it's going to do.
I got them from tire rack. They were in stock and shipped super fast. Mine are 245/40R17. I wanted to get a wider tire but I can't find any bigger rims that I like that are in stock....
jamesm
Goblin Guru
Finally got to run another autocross on Sunday. It was hot but we had a good day. I forgot my gopro at home so I don't have any videos....
A big THANK YOU! to all of y'all that suggested drawing and marking the route on paper. It made the track much easier to navigate when I was driving.
A big THANK YOU! to all of y'all that suggested drawing and marking the route on paper. It made the track much easier to navigate when I was driving.
jamesm
Goblin Guru
Speaking of changes, I'm probably going to pull some more camber out. I'm running around 1.2° right now and I think I'm going to back down to probably .5°. There's still a portion of the outside of the front tire that isn't making contact with the ground. I'm also going to start tracking before/after numbers for tire temps and pressures along with the run times.
I found out Sunday that there are two other groups that run autocrosses at the same location that the SCCA group uses so I'm signing up for several of their events.
I found out Sunday that there are two other groups that run autocrosses at the same location that the SCCA group uses so I'm signing up for several of their events.
JBINTX
Goblin Guru
1.2 deg camber may be good for a narrow OEM tire, but if you put wider tires on, 0.5-0.7 works well.
JBINTX
Goblin Guru
Did you record your tire pressures?
adjust them that day at all?
Does not look like you got to the inside edge either.