Weiss says how fast they jack the car up effects the droop measurement

[dirty-white-boy]

Claims the right front shock compresses and gives a different reading from when the left rear is lifted off the ground slower. Any truth to this?

90 other cars had no droop issues for 4 days.....

[84wedge]

I noticed Davenport cranking the steering to the right over and over before they checked him last night, and he left the wheels turned to the right. The also jacked the car up very slowly.

[billetbirdcage]

When the cars are at ride height (old deck hieght rule of 39"), if the RF was compressed 1" at the RF shock it raised the LR Deck the same 1" (roughly). Basically it was a 1 to 1 ratio, thus why we have a nose height rule

However when checking the droop, since the jack is under the LR on the undersling this does not happen nowhere near as much. On most cars (Wiess could be different) when checking drop you can compress the RF 1" and it only effect the LR deck height maybe a 1/4". This is due to the pivot point is now where the Jack is (under LR tire) so instead of a 1 to 1 ratio on RF to LR effect it cuts it down to more like 1 to 4.

Unless he was cutting it so close to the 50.5" limit (allowed .5 tolerance so 51.0" max) that a extra 1/4" got him over, I'm not seeing it.

Just my opinion but without seeing what they did when they checked him and whether that was the normal sequence I normally see them do, I can't say for sure. I have never seen much discernible difference in jacking the car fast or slow.

[lurker]

I noticed Davenport cranking the steering to the right over and over before they checked him last night, and he left the wheels turned to the right.

I noticed that also. Very interested in knowing the effect of doing this.

[ZERO25]

A $10 tape measure used on a 100k racecar for a 12k payday!

Surely, theres a better way!

[LugNutz]

Ricky got HOSED!!!

[MasterSbilt_Racer]

I noticed that also. Very interested in knowing the effect of doing this.

Caster in the rf raises that corner when you turn right. It has a big impact on the old static deck height measurement. It has some effect with droop measurement, but not nearly as much.

[lurker]

Thank you!

[grt74]

ive always wondered , i know most of these guys have there cars really hooked up, and even if you check it in the shop, how can you adjust for a tire that gained air pressure, heat, and grew, i mean we are talking about fractions of an inch

its a pain in the butt rule, especially if you change something other than the limiter and didnt check it, but is what it is, i would say everyone is going to fail one time or another, but the regulars do get away with a ton more
and no doubt if they did jack it up fast and he had a ton of rebound in the rf and they did get the lr off the ground, i would agree with him, but i wasnt there, so cant say

i could give a very creditable answer on this about changing the rf springs or rebound but never touching the limiter, and the deck height would end up different, not alot but enough to through you out ??? dont know

and let me say i never heard how much it was out

[Rajflyboy]

Caster in the rf raises that corner when you turn right. It has a big impact on the old static deck height measurement. It has some effect with droop measurement, but not nearly as much.

I enjoy your knowledge and input 👍

[kidrock]

I enjoy your knowledge and input 

Same here. He usually always has insightful post.

[Bradley]

A $10 tape measure used on a 100k racecar for a 12k payday!

Surely, theres a better way!

Same $10 tape measure passed all the other cars, was it really the tape measure's fault ??

[TBSprintFan]

Ricky got HOSED!!!

Again everyone else passed that went through the droop testing and I am pretty sure they checked his car the same way they checked everyone else. Plus it doesn't look good for his sponsors that he loaded up and went home because then he looks like a sore loser. Mason Ziegler went to the back of his heat race after a flat and made it into the show. And if you didn't qualify through the heat and moved up, he still would of had a great chance through the bmain where they took the top 4.

[Raceready]

A $10 tape measure used on a 100k racecar for a 12k payday!Surely, theres a better way!

Are they also utilizing a Harbor Freight jack as well ?

[billetbirdcage]

He was an inch out of tolerance


Sorry but his excuse holds NO water being that far out