![]() |
|
![]() |
#1 |
Knuckle head
Join Date: Mar 2008
Location: NC
Posts: 283
|
Re: Make it handle
Rob,
I have a question for you. I am in the middle of rethinking my brake setup since the underdash pedal assembly I have isn't going to work for me. I had planned on using a 7" booster and a corvette style dual master cylinder and a pro-valve. My plan now is to use the Wilwood reversed brake pedal kit without a brake booster and with dual master cylinders, one for the front and one for the rear. My question is how do I figure out what bore size would be best for me? I have a '71 stepper, porterbuilt mild dropmember with bags, and a fatbar 4-link with Shockwaves. For the brakes I have the following Wilwood kit- 13" Forged Narrow Superlite 6R Big Brake Front Brake Kit 13" Forged Narrow Superlite 4R Big Brake Rear Parking Brake Kit
__________________
Adam '71 SWB/Step ![]() 2017 Crew Cab Silverado LTZ with 6.2l, 8 Speed tuned by RPM in Garner, NC '00 Chevy 1500 6.0l Silverado Reg. Cab Short Bed '09 Chevy 1500 5.3l Silverado Crew Cab Short Bed (SOLD) 1971 LWB on 2014 1 ton chassis, L96 6.0LS / 6L90E http://67-72chevytrucks.com/vboard/s...d.php?t=796785 1969 LWB C10- Future project, possible AWD C10 on a 2002 Escalade Chassis. ![]() |
![]() |
![]() |
![]() |
#2 |
Registered User
![]() Join Date: Jun 2012
Location: Anaheim, CA
Posts: 455
|
Re: Make it handle
I've narrowed down my search for suspension. After talking to Porterbuilt on the phone for quite a while I'm going with a coilover touring dropmember front end and mild c-notch in the rear. I'd go lower but I don't want to raise the bed.
From what I've read the Hotchkis TVS (as I previously mentioned) kicks ass, but I don't want to mix and match parts between Hotchkis and Porterbuilt and I'd rather support PB anyways. Pulling the engine possibly today and starting the teardown as soon as my brothers S2K is out of the shop. Blasting the rails and will mockup everything once PB components arrive. I'd like to order the wheels/tires asap though but without all the parts, I'd rather not risk it. Any luck with the backspacing chart mentioned above? |
![]() |
![]() |
![]() |
#3 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
|
Re: Make it handle
No luck yet on more wheel info. Does Nate have specs for his suspension?
__________________
GoodGuys 2012 Pro-Truck Champion ![]() 2012 Truckin' Throwdown Champion GoodGuys 2011 National Champion ![]() 2011 Truckin' Throwdown Champion GoodGuys 2010 National Champion ![]() Proud to put our products up against all others! |
![]() |
![]() |
![]() |
#4 |
Registered User
Join Date: Jun 2010
Location: Longview, TX
Posts: 222
|
Re: Make it handle
i don't really know if this fits in the suspension forum, but it does go along with handling.
for us auto tranny guys, would running a ratchet shifter with reverse lockout be hugely beneficial for us on an autocross course, but still be able to put it in drive and cruise? seems like something project JT needs. just curious, because being able to upshift/downshift one at a time knowing that it will be one gear, and keep it out of park, reverse, and neutral would be just as beneficial. anyone running one have any imput?
__________________
"As I walk through the valley of rice i fear no honda, for i have torque!" |
![]() |
![]() |
![]() |
#5 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
|
Re: Make it handle
Well, this is the set up I use in the HellBoy C10. A nice thing here is the 'balance bar'. This takes place of the prop valve, and is easier to tune. I started with the recomended 13/16" bore rear, and 3/4" bore front. - also a 3/4" bore clutch. And, I run 4-piston superlights on all four, 1.75" bore front, and 1.625 bore rear. My wieght balance is 52% ft. - pretty good for a p/u. Our J.T. shop truck is 57% ft. So, it was OK this way, but I couldn't get the rears to lock up. Even with the balance bar max'd out. So, I switched to a 3/4" bore rear master. That worked good for me. The balance bar is close to center, which gives me some tuning room. Now, I am playing with pads to get the last little bit out. - haha, don't ever try 'A' pads on high $$ rotors. - they will have a 1000 mile lifespan. - just so ya know. Really agressive!!! lol.
So, try the same set up to start,(13/16" and 3/4") it may match your 6/4 piston set up well. But, don't be shocked if you want/need to change one or both later. For a softer pedal you might try a 3/4" and 5/8", but this will have more pedal travel. Oh ya, the one piece aluminum cylincers are the ticket inside. The plastic resivours seep just a tiny bit.
__________________
GoodGuys 2012 Pro-Truck Champion ![]() 2012 Truckin' Throwdown Champion GoodGuys 2011 National Champion ![]() 2011 Truckin' Throwdown Champion GoodGuys 2010 National Champion ![]() Proud to put our products up against all others! |
![]() |
![]() |
![]() |
#6 | |
Knuckle head
Join Date: Mar 2008
Location: NC
Posts: 283
|
Re: Make it handle
Quote:
Thanks again for your advice. A couple questions so I can really understand this. Did you end up going to the 3/4" bore for the rear of JT or Hellboy? Also are you talking about the Wilwood solid aluminum M/C (has resevoir built on it)? My plan was to run a remote aluminum dual F/R resevoir on the firewall and I am not sure how to do that with the solid M/C. Thanks again, Adam
__________________
Adam '71 SWB/Step ![]() 2017 Crew Cab Silverado LTZ with 6.2l, 8 Speed tuned by RPM in Garner, NC '00 Chevy 1500 6.0l Silverado Reg. Cab Short Bed '09 Chevy 1500 5.3l Silverado Crew Cab Short Bed (SOLD) 1971 LWB on 2014 1 ton chassis, L96 6.0LS / 6L90E http://67-72chevytrucks.com/vboard/s...d.php?t=796785 1969 LWB C10- Future project, possible AWD C10 on a 2002 Escalade Chassis. ![]() |
|
![]() |
![]() |
![]() |
#7 | |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
|
Re: Make it handle
Quote:
__________________
GoodGuys 2012 Pro-Truck Champion ![]() 2012 Truckin' Throwdown Champion GoodGuys 2011 National Champion ![]() 2011 Truckin' Throwdown Champion GoodGuys 2010 National Champion ![]() Proud to put our products up against all others! |
|
![]() |
![]() |
![]() |
#8 | |
Knuckle head
Join Date: Mar 2008
Location: NC
Posts: 283
|
Re: Make it handle
Quote:
Thanks for your help, Adam
__________________
Adam '71 SWB/Step ![]() 2017 Crew Cab Silverado LTZ with 6.2l, 8 Speed tuned by RPM in Garner, NC '00 Chevy 1500 6.0l Silverado Reg. Cab Short Bed '09 Chevy 1500 5.3l Silverado Crew Cab Short Bed (SOLD) 1971 LWB on 2014 1 ton chassis, L96 6.0LS / 6L90E http://67-72chevytrucks.com/vboard/s...d.php?t=796785 1969 LWB C10- Future project, possible AWD C10 on a 2002 Escalade Chassis. ![]() |
|
![]() |
![]() |
![]() |
#9 |
56 - autocross
Join Date: Apr 2010
Location: Camarillo, Ca
Posts: 1,121
|
Re: Make it handle
|
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Nov 2012
Location: Rising Star, Tx
Posts: 249
|
Re: Make it handle
So From what I can tell it would be better to have the front part of my truck arms as low as possible to make the trailling arms as close to level at ride hieght? I have a cpp x-member and they recomended installing it with the pad-eyes in the upper pos. Should I flip that over modify if needed and try that? By the way have not installed the mounting pads for the rear-end so I can still adjust the pinion angle.
__________________
NAME: TRAVIS TRUCK: BRUISER 71 C/10 SWB 3.5/5" drop 4.11 GEARS. F.A.S.T. BBC 408 496hp/479ft/lb JAKES 4L80E TCI TCU PTC 10.5" 2800 STALL My build thread: http://67-72chevytrucks.com/vboard/s...30#post5779530 |
![]() |
![]() |
![]() |
#11 | |
Fun Stuff
![]() Join Date: Jan 2010
Location: Sedro Woolley, WA
Posts: 400
|
Re: Make it handle
Quote:
__________________
Jay 68 C10(project) 88 Honda Accord(DD) 93 Chevy Astro EXT 2wd |
|
![]() |
![]() |
![]() |
#12 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
|
Re: Make it handle
The hieght of the front trailing arm mount will directly effect the "anti-squat", or "rate of rise" of the rear suspension. Raising the mount will raise the anti-squat value.
Here's what may happen. For an A.S. value of 50%, the front would lift slightly, the rear would drop, or "squat", and a majority of the axle's rotating force would be used to push the truck forward. But, this will reduce the total tracion available. At 100% A.S., the truck would appaer to lift evenly, ft/rr, during a launch, splitting the axle forces between a forward push and tire loading. At 150% A.S., the rear of the truck would rise, with the majority of forces being used to plant the rear tire. But, this takes away from theforward push. Ideally, you want the lowest A.S. value you can have, that still keeps the rear tires planted. For most of our trucks, that would be just above 100%, and that woul 'ideally' put the front trailing arm mount even, or just above the floor. So, I think you should mount the CPP X-member as designed, with the mounts up. BTW, the 'bend' in the factory arm was designed in for purposes of "packaging". As far as the axle is concerned, the arm could be straight. The axle saddle's rotation would change to keep the pinion angle the same. But, if the arms were straight, mounting a coil spring would be difficult. The bend in the stock arm was all about mounting the coil spring as efficiently ($$) as possible. The one thing that iI wonder about is the shock mounts, in this regard. It may have been cheaper to form the lower shock mounts right on to the end of the trailing arm, moving the shocks outboard, and improving the ride and stability. But, they need a stamped lower plate for the U-bolt nuts anyway. Hmm. Then there is the idea that the shock is more protected from rocks and road junk if its inboard. - we may never know. ![]()
__________________
GoodGuys 2012 Pro-Truck Champion ![]() 2012 Truckin' Throwdown Champion GoodGuys 2011 National Champion ![]() 2011 Truckin' Throwdown Champion GoodGuys 2010 National Champion ![]() Proud to put our products up against all others! |
![]() |
![]() |
![]() |
#13 |
Registered User
![]() Join Date: May 2011
Location: Missoula, MT
Posts: 934
|
Re: Make it handle
Rob,
I was noticed that you added a splitter and a spoiler to Hellboy and it got me wondering about mechanical vs. aero grip on these trucks. We spend most of our time working on mechanical grip, but what and where are the gains of a sleek 67 hood, tonneau cover, splitter and spoiler? Can you elaborate on the principles, you must have done those things for a good reason? Thanks for your willingness to share your wealth of knowledge.
__________________
69 GMC C10 build thread- http://67-72chevytrucks.com/vboard/s...d.php?t=501676 03 Silverado build thread-http://67-72chevytrucks.com/vboard/s...d.php?t=591582 |
![]() |
![]() |
![]() |
#14 | |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
|
Re: Make it handle
Quote:
__________________
GoodGuys 2012 Pro-Truck Champion ![]() 2012 Truckin' Throwdown Champion GoodGuys 2011 National Champion ![]() 2011 Truckin' Throwdown Champion GoodGuys 2010 National Champion ![]() Proud to put our products up against all others! |
|
![]() |
![]() |
![]() |
#15 | |
Registered User
![]() Join Date: May 2011
Location: Missoula, MT
Posts: 934
|
Re: Make it handle
Quote:
__________________
69 GMC C10 build thread- http://67-72chevytrucks.com/vboard/s...d.php?t=501676 03 Silverado build thread-http://67-72chevytrucks.com/vboard/s...d.php?t=591582 |
|
![]() |
![]() |
![]() |
#16 |
Registered User
Join Date: Dec 2008
Location: Wyoming
Posts: 811
|
Re: Make it handle
was thinking about this thread today and front upper/lower a-arms......not sure if its been covered....is there an ideal relationship to the ground for best handling? i.e. flat (parallel to ground), pointed up, pointed down?
|
![]() |
![]() |
![]() |
#17 |
Senior Member
![]() Join Date: Jul 2010
Location: Dandridge, Tn. USA
Posts: 2,226
|
Re: Make it handle
I usually try to keep the lower A-arm level to the road. This would be the line from the center of the pivit bushing to the pivit center of the ball joint. - this ma bee a bit different than the arm itself. On street cars, I would want to just a bit more spring hieght, with the ball joint slightly lower than the bushing, and for a track set up, just the opposit, with the ball joint slightly higher. All of this would be within 5 degrees of being level.
__________________
GoodGuys 2012 Pro-Truck Champion ![]() 2012 Truckin' Throwdown Champion GoodGuys 2011 National Champion ![]() 2011 Truckin' Throwdown Champion GoodGuys 2010 National Champion ![]() Proud to put our products up against all others! |
![]() |
![]() |
![]() |
#18 | |
Registered User
Join Date: Dec 2008
Location: Wyoming
Posts: 811
|
Re: Make it handle
Quote:
![]() ![]() |
|
![]() |
![]() |
![]() |
#19 |
Registered User
Join Date: Aug 2012
Location: Indiana
Posts: 470
|
Re: Make it handle
SUB'D this is a awesome page a lil over my head but i am trying to learn how to make my truck turn a corner
__________________
70 C10 working on a LSx swap ![]() 4.8L MS3 edelbrock pro flo intake, pacesetter long tubes, 4l60e 2500 stall hoping the tranny holds up lol |
![]() |
![]() |
![]() |
#20 |
Registered User
Join Date: May 2005
Location: Beaverton, OR
Posts: 3,728
|
Re: Make it handle
I want to see these pics of Hellboy with the road course spoiler!
__________________
New Project: 1966 LWB C20 Plans: 1/2 ton conversion Dropmember front Dropmember rear Corvette discs Restored raised bed http://67-72chevytrucks.com/vboard/s....php?p=4295210 |
![]() |
![]() |
![]() |
#21 |
Registered User
![]() Join Date: Jun 2012
Location: Anaheim, CA
Posts: 455
|
Re: Make it handle
These wheels are amazing! Truck looks great Rob! Very impressed.
|
![]() |
![]() |
![]() |
#22 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
|
![]()
I like the picture Rob! Very
![]() ![]() ![]()
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
![]() |
![]() |
![]() |
#23 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
|
Re: Make it handle
Hmmm.............a BFGoodrich sticker.....................but with Falken tires mounted.
![]()
__________________
|
![]() |
![]() |
![]() |
#24 |
Registered User
Join Date: May 2005
Location: Beaverton, OR
Posts: 3,728
|
Re: Make it handle
Rob, the pic you posted on Facebook of Hellboy in downtown Portland is one of my favorite truck pics. I love everything about that truck and to see it in my part of town is awesome.
__________________
New Project: 1966 LWB C20 Plans: 1/2 ton conversion Dropmember front Dropmember rear Corvette discs Restored raised bed http://67-72chevytrucks.com/vboard/s....php?p=4295210 |
![]() |
![]() |
![]() |
#25 |
Registered User
![]() Join Date: Jun 2012
Location: Anaheim, CA
Posts: 455
|
Re: Make it handle
I'd give my first born for those wheels.
Posted via Mobile Device |
![]() |
![]() |
![]() |
Bookmarks |
|
|