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TRU TURN - Musclecar Steering Components

What is it?


The TruTurn system is an upgraded steering system that includes the following:

  1. Spindles – taller overall to improve the camber gain and a raised spindle pin to lower your car by 2" [ Click to see the difference ]
  2. Steering Arms – designed to correct bumpsteer AND allow clearance for up to a 10" wide wheel with a 5.75" backspacing.
  3. Draglink bracket – bolts onto your oem draglink to relocate the inner tierod end to minimize bumpsteer
  4. Tie Rod Assemblies – integrates with your new steering arms and centerlink to provide a tru "no fab" bolt on steering system.

 

What will this system do?


The early Camaro/Nova frontends have very poor suspension geometry...the tires lean outward around turns, the bumpsteer is bad, and there is little room to run a wide wheel because of the oem steering arm interference with the inside of the wheel. The TruTurn system resolves ALL these issues...the tires now lean INTO the turn, the bumpsteer is UNDER .050" through 5" of suspension travel, and you now have clearance to run up to a 10" wide wheel with a 275mm tire!


TruTurn complete package includes:
spindles, steering arms, draglink bracket, and tie rod assemblies

 

Vehicle Applications Part # Price  
1967-69 Camaro 11169500 $1000 Add to Cart
1968-74 Nova 11169500 $1000 Add to Cart
NEW 1964-66 Mustang
Includes StrongArms [See More]
12099599 $2100 Add to Cart
NEW 1978-88 G Body
Includes StrongArms [See More]
Uses Stock Spindle
11329599 $1200 Add to Cart


TruTurn UPGRADE package ( same as above MINUS the spindles )

Price: $650

Vehicle Applications Part # Price  
1967-69 Camaro 11169525 $650 Add to Cart
1968-74 Nova 11169525 $650 Add to Cart
size matters
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Frequently Asked Questions


  1. Do I have to modify my oem subframe?
    No modifications are necessary at all.

  2. Can I really fit a 10" wide wheel with a 275mm tire?
    Yes! There is no modification necessary to the subframe, but you WILL need to create clearance on the inner wheelhouse and the outer fender lip. These modifications can be as simple or elaborate as your talent and ambition dictate, but if done nicely, are all but invisible.

  3. Can I use my existing OEM or other aftermarket dropped spindles with this system?
    No...the RideTech spindle is a critical part of the whole system. Using a different spindle will create highly unfavorable suspension geometry and would be incompatible with our steering arms.

  4. Will a 17" wheel work with this system?
    Yes...We have fitted a 17x10 wheel on this system with a Baer 14" rotor and their 6P calipers.

  5. Can I use my stock brakes or other aftermarket brakes with this package?
    OEM drum brakes will not work with this spindle. OEM discs or other brands of disc brakes intended for an F body or A body GM should be fine.

  6. What is "bumpsteer" and why should I be concerned about it?
    Bumpsteer is a term that refers to the control arms and the steering linkage moving in different arcs as the suspension moves through its travel. When this happens the tierods will move the steering arms [and therefore the wheels] in directions that the driver does not intend. This leads to an "uneasy" feeling car. Some OEM cars [especially older musclecars] can have a lot of bumpsteer...as much as 1"! Imagine the toe setting on your car changing unpredictably as you go down the road! The TruTurn system nearly eliminates this situation...the bumpsteer in less than .050" over the entire 5" of suspension travel. This leads to a very stable and comfortable feeling vehicle.

  7. 7. What is camber gain and why should I be concerned about it?
    Camber gain refers to the rate of camber change the spindle will see through the range of suspension travel. With most OEM cars [especially older musclecars], the OEM suspension geometry will lean the compressed wheel OUT when turning. [Take a look at an early Chevelle or Camaro taking a hard turn] With the TruTurn suspension the compressed wheel will lean INTO the turn, keeping the tire squarely on the ground thereby offering more lateral grip AND offering a more stable turning experience.

  8. Will I sacrifice any turning radius?
    No loss of turning radius! An 18x10 wheel with 5.75" of backspace and a 275/35-18 tire will lightly kiss the framerail or the swaybar at full lock under full compression...just enough to clean the paint off...no damage to the wheel, tire, or other components.

  9. Is the TruTurn system compatible with my OEM control arms, or other brands of control arms?
    We have only done fitments with the RideTech StrongArms. While it is possible that the OEM arms, or another brand of tubular control arm could work, we cannot guarantee fit or performance.

  10. Is the new TruTurn system compatible with previous RideTech Camaro components such as the StrongArms, tall spindle, or ShockWaves?
    Yes...the TruTurn system can be added to your existing RideTech suspension. If you already have RideTech spindles, the upgrade package would include the steering arms, draglink bracket, and the tie rod assemblies.

  11. What is the bumpsteer change along the travel of the suspension?
    The bumpsteer numbers along suspension travel are just stellar. As indicated at the bottom of the graph, the total variance through 5" of suspension travel is less than .050"...about the thickness of a dime. Put in context...many [most] newer cars have .150" to over 1" of bumpsteer variation. Indycars shoot for less than .020".

 

Tru Turn compatibility evaluation


In response to many requests to determine the compatibility of our new Tru Turn system with other manufacturer's suspension components, we have gathered and evaluated some fitment and geometry data for the following combinations.

We realize fully that this does not cover all the possible combinations. It ONLY evaluates the most likely [and requested] combinations of the Tru Turn system with other manufacturers components. We did not evaluate any aftermarket combinations with the oem Camaro steering arm because it's length and position typically prevents the use of the wider 10" width wheel, which has been a primary requirement of most customers.

It is very important to note that we have NOT evaluated other manufacturer's COMPLETE systems. It is very possible that their complete systems will generate better geometry data.

That is why we strongly recommend that your use a complete engineered and compatible system instead of trying to piece together a suspension system from scratch!

Most manufacturers should be able to give you this level of geometry evaluation on their own suspension systems.

 

  A B - Complete TruTurn Package C
Ridetech Control Arms
Stock Spindle
Stock Steering Arm
NO Tru Turn
Ridetech Control Arms
Ridetech Spindle
Ridetech Steering Arm
Tru Turn
Ridetech Control Arms
ATS Spindle
Ridetech Steering Arm
Tru Turn
Suspension Travel Camber Change Total Toe
Change
Camber Change Total Toe
Change
Camber Change Total Toe
Change
3.0" Compression            
2.5" Compression -0.5 -0.600 -2.9 -0.040 -2.5 -0.260
2.0" Compression -0.4 -0.440 -2.3 -0.020 -1.9 -0.240
1.5" Compression -0.2 -0.280 -1.8 0 -1.5 -0.140
1.0" Compression 0 -0.250 -1.2 0 -1.3 -0.120
0.5" Compression 0 -0.120 -0.5 0 -0.5 -0.050
0 0 0 0 0 0 0
0.5" Extension 0.2 0.040 0.2 0 0.6 0.120
1.0" Extension 0.2 0.120 0.7 0.020 0.8 0.240
1.5" Extension N/A N/A 0.9 0.040 1.2 0.300
2.0" Extension N/A N/A 1.3 0.060 1.5 0.480
2.5" Extension N/A N/A 1.4 0.070 1.7 0.540
Max Toe Variation .600" Toe In @ 2.5" Compression .070" Toe Out @ 2.5" Extension .540" Toe Out @ 2.5" Extension
Total Toe Change Total Toe Change .720" Total Toe Change .110" Total Toe Change .800"

 

  D
E
F
Ridetech Control Arms
Heidts Spindle
Ridtech Steering Arm
Tru Turn
Heidt's Control Arms
Heidt's Spindle
Ridtech Steering Arm
Tru Turn
Heidt's Control Arms
Heidt's Spindle
Ridtech Steering Arm
Tru Turn
Outer Tie Rod Shimmed Down .750" 
Suspension Travel Camber Change Total Toe
Change
Camber Change Total Toe
Change
Camber Change Total Toe
Change
3.0" Compression       -0.520   -0.250
2.5" Compression -2.6 -0.500        
2.0" Compression -2.0 -0.400   -0.500   -0.200
1.5" Compression -1.2 -0.270        
1.0" Compression -0.7 -0.250   -0.274   -0.170
0.5" Compression -0.3 -0.120        
0 0 0   0   0
0.5" Extension 0.4 0.250        
1.0" Extension 0.9 0.400   0.274   0.170
1.5" Extension 1.2 0.420        
2.0" Extension 1.5 0.500   0.500   0.200
2.5" Extension 1.7 0.550        
Max Toe Variation .550" Toe Out @ 2.5"
Extension
.520" Toe In @ 3.0" Compression .250" Toe In @ 3.0" Compression
Total Toe Change Total Toe Change 1.050" Total Toe Change 1.020" Total Toe Change .450"

 

Data summary:

Example A – This is a OEM spindle with an OEM steering arm…just like GM delivered it. The camber curve is nearly nonexistent, meaning that the tire will NOT lean into the turn as we would like. The toe variation @ .600" of toe IN during compression and total change @ .720" are both excessive.

Example B – The Tru Turn system shows 2.9 degrees of camber gain at a 2.5" compression position. It also shows a toe variation of only .070" toe out and a total toe change of only .110".

Example C – Substituting the SpeedTech ATS aluminum spindle within the Tru Turn system changes the camber curve little, but seems to make a dramatic increase in both max toe variation @ .540" and total toe change @ .800".

Example D – Substituting the Heidt's spindle in the Tru Turn system created geometry similar to example C only with even more toe variation and change

Example E – Substituting the Heidt's control arms for the RideTech arms did not significantly alter the geometry from example D

Example F – Shimming the outer tie rod DOWN by .750" made a huge improvement. Max toe variation was .250", and total toe change was .450"

 

Overall summary

These examples DO NOT tell us that other manufacturer's components or systems are inferior to the Tru Turn system. Instead they tell us that just because certain components will bolt up together, it does not necessarily mean that they will function properly together. Yes, your car will likely go down the road just fine for many years. No, a mismatched combination of parts will not offer "just as good" of handling performance as a complete system.

All the aftermarket examples showed a similar and significant improvement in camber gain. The differences seemed to be in the bumpsteer measurements. Bumpsteer is radically affected by the precise location of the various steering components. Different manufacturers will use slightly different locations for these components. When used as intended [as a complete system] they will achieve the intended goals. When combined with other [unknown] components, the end result may coincidently bolt together, but may not achieve the geometry that was originally intended.

 


Tru Turn Package - 1967-1969 GM F-Body

Part #: 11169500

$1,000.00

The Tru Turn system is an upgraded steering system that includes sprindles, steering arms, draglink bracket and tie rod assemblies. This upgrade will allow you to have enough clearance to run up to a 10" wide wheel with a 275mm tire!


Tru Turn Upgrade Package - 1967-1969 GM F-Body

Part #: 11169525

$650.00
The Tru Turn system is an upgraded steering system that includes sprindles, steering arms, draglink bracket and tie rod assemblies. This upgrade will allow you to have enough clearance to run up to a 10" wide wheel with a 275mm tire!

Tru Turn Package - 1964-1966 Ford Mustang

Part #: 12099599

$2,600.00

The Tru Turn system is an upgraded steering system that includes sprindles, steering arms, draglink bracket and tie rod assemblies. This upgrade will allow you to have enough clearance to run up to a 8" wide wheel with a 245mm tire!


Tru Turn Upgrade Package - 1968-1974 Nova

Part #: 11169525

$650.00
The Tru Turn system is an upgraded steering system that includes sprindles, steering arms, draglink bracket and tie rod assemblies. This upgrade will allow you to have enough clearance to run up to a 10" wide wheel with a 275mm tire!

Tru Turn Package - 1978-1988 GM G-Body

Part #: 11329599

$1,300.00

The TruTurn system resolves bumpsteer and camber gain issues... the tires now lean INTO the turn, the bumpsteer is 0.000" through 5" of suspension travel, and you have clearance to run up to a 275mm Tire.