Last week we went to a different track and with a different driver. Car was tight on entry and tight in the middle on the throttle. Going back to same track this week with the regular driver, going to change offset on rr from a 4 to a 3, hate to change much do to different driver. Front springs are 600 lf and 550rf and still have about 1in of shock rod left showing. Thanks
tight on entry
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raise j bar on rear end. that will loosen entry and middleI think there should be lifeguards in the genepool.
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If the j bar is all the way up, there is probably something else going on. It isn't normal for the j bar to be that high, which is what would make me think it was something else. Make sure it isn't a brake problem first. The compression being too soft on the LR shock is the main thing that causes a 4 bar car to be too tight on entry. ( new driver not trail braking or arcing in the same as the other driver letting the LR drop on entry)
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I was just throwing that out to see what i got for answers, i know nothing of the OP car or setup. Even w/ the quickchange you guys are never at the top on the pinion?
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Nope, never.Originally posted by powerslide View PostI was just throwing that out to see what i got for answers, i know nothing of the OP car or setup. Even w/ the quickchange you guys are never at the top on the pinion?
Dave2012 UMP Stock Car National Champions.
2013 UMP Modified Rookie of the Year
2014 Kankakee Speedway UMP Modified Champion
2016 Fairbury American Legion Speedway UMP Modified Champion
2016 Kankakee Speedway UMP Modified Champion
2016 UMP Modified, Northen IL Regional Champion
2018 UMP Modified, #2 National Points Standings
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I started with mine at the top on my q/c. It was about a inch above the pinion i believe(i will double check) which is in the bottom hole or pretty close on a 9in. Car was still usually tight on entry on hammer down bull ring. What are you guys doing to free the car up to compensate for the low panhard location? How much trail? front spring split? You guys run UMP tires so that may play into the balancing act as well.
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jsf74
straight panhard bar mounts to top of pinion plate.
j bar is 1" above pinion centerline. Per Lightning set up sheet.I think there should be lifeguards in the genepool.
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Sorry I haven't answered back sooner as I had a brother-in-law having surgery yesterday and when I got home, I couldn't get on 4m. We are at center of pinion on qc and if the offset doesn't work, that would be a good adjustment. Thanks for the help.
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Using the term" top" on the pinion plate differs with which pinion plate you have. Some are 3" above pinion, while others are 1" above pinion. It is common for a J bar to be between 1 1/2" above to slightly below on a mod. A straight bar on the left side of the pinion is usually higher than the J bar would be.
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What about moving the lrt bar up past the 45degree angle to add more rear steer, lr is chained at 45 degrees right now. What about swapping front springs or putting a 600 in rf? What do y'all think of these adjustments? Thanks
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