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#76 | |
Registered User
Join Date: Sep 2006
Location: Covington, WA
Posts: 770
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Re: Make it handle
Quote:
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#77 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
Here's a quick lesson we learned, or re-learned last night. We have a local road coarse that runs 'time-attack' on tuesday nights. It's a great place to test, and a heck of a lot of fun. A frustrated group with a pretty nice 32 roadster were unhappy with its handling, and set out to fix it. - Its a good runner, and it handles well. They unhooked the rear swaybar, AND make a big change in brake bias, shutting down the rear brakes as much as possible. Next run they spun the car into some tires, and ground it down the track curb. Scuffed paint, tweeked fender tip, (slight), and a tore up lower A-arm.
Lesson 1: ONE CHANGE AT A TIME Lesson 2: DOCUMENT YOUR CHANGES - AND THE RESULTS Lesson 3: FEEL THE CAR OUT AT LOW SPEEDS FIRST I know not everybody has a test track available, but you can lay out a test run area on a back road. As you run it, note your speed or rpm through different areas, check tire temps at the end of a run. We use a hand help heat gun. check the temps at the center, and each side of the tread (inside/ouside) Compare your temps. Hot in the center - too much air. Cool in the center - low pressure. Lets say temps run 122 outside, 128 center, 136 inside. - too much neg camber. This is a great tuning tool. give it a try. Last edited by robnolimit; 09-15-2010 at 12:40 PM. Reason: spelling |
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#78 |
Junior Member
Join Date: Feb 2005
Location: Huntingburg IN
Posts: 620
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Re: Make it handle
Did you do this backroad testing between the pizza place and the house ? I remember the 46 really likes that road..... and I didnt believe you when you said that car is like a good horse and knows its way home.....
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#79 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
hey, we made it home. that is a good test road. Waterman canyon is good too, but next time you're out here I'll take you out to Adams in the 'Bullit. We'll stop by Wally-mart and get you some depends first.
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#80 |
Junior Member
Join Date: Feb 2005
Location: Huntingburg IN
Posts: 620
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Re: Make it handle
Depends.... ??? why did you finally put carpet in that thing?
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#81 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,970
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Re: Make it handle
ttt......
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#82 |
Junior Member
Join Date: Feb 2005
Location: Huntingburg IN
Posts: 620
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Re: Make it handle
uppers......
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#83 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
Uppers? Downers? white ones, red ones? what??? Ohhh, A-Arms. got it.
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#84 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,970
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Re: Make it handle
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#85 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
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#86 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
OK, so we finially figuered the video load out. Pretty cool. This was the winning run in Costa Mesa. A good teazer for ya.
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#87 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
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Re: Make it handle
Fun stuff Rob, thanks for sharing. I noticed that it ran very flat through most of the course. Almost zero tire squeal until you drifted through the S turn.
Looks like a fun way to spend the day. Once I get my 77 back together, I'll have to give it a try.
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#88 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
Yeah it was a lot of fun. We'll be at the Tx Goodguys in a few weeks, come by and see us.
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#89 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
Sometimes a little drift is the fast way around, - a lot of drift is not
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#90 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
should i get RideTech contingency? Nice sticker placement
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#91 | |
Happy to be here
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Location: Cypress, TX
Posts: 39,023
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Re: Make it handle
Quote:
I'll be in Ft Worth as well, with the 77 in the Ride Tech display.
__________________
Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#92 |
Registered User
Join Date: Oct 2008
Location: oxnard ca
Posts: 2,201
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Re: Make it handle
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#93 |
Happy to be here
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Location: Cypress, TX
Posts: 39,023
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Re: Make it handle
Justin- You guys bringing anything to run, or just coming as a vendor?
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#94 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
OK class, todays topic, rear locators. I chose my words carefully. Diagonal locators, Panhard rods, Watts link, wishbone,...... there are many. More than one way to skin a cat. for street performers, I like a panhard rod. I know, many favor other types. I have two reasons. 1. K.I.S.S. - keep it simple stupid! - fewer moving parts, easy to set up correctly. 2. Panhard rods allow you to set the rear roll center, and adjust it easily, without a complicated formula. While we may think (dream) about a high roll center with a low center of gravity, we are playing with trucks, not corvettes. High roll centers on the back of a truck will help keep it flat, it will also keep it spinning around.
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#95 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
Did I go too fast on that one?
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#96 |
Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Make it handle
Can you briefly explain what you mean by rear roll center? feel dumb for asking but I just want to make sure I understand what you are saying here
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#97 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,970
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Re: Make it handle
Don't 'feel' dumb for not knowing; it's a good question.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#98 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
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Re: Make it handle
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#99 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,970
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Re: Make it handle
Excellent description for explaining the difference RC & CG can play on a truck vs. a car. I hope to see your rig go round & round @ GG's Ft.Worth.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#100 |
Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Make it handle
Had to read... and re-read... but got it! Thanks for the explanation. I'm going to be running a rear trailing arm set up and just trying to get a better understanding of how it all ties together, and get the most out of my ride!
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