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Start line control

Stage control or starting line control cylinder and valve kit.
This is very useful for not only *DYO cars but class cars as well.
For DYO race cars it allows you to stage the car at idle with the throttle pedal all the way open. The valve opens the throttle wide open once the transbrake is released, then just before the delay in the box releases the engine is at the chip limit set in the MSD. This does several things. One it prevents someone from burning you down on the start line. This is not so much engine  temperature but trans temperature. We have observed the temperature of the fluid coming out of the converter while at stage rpm will skyrocket from 160F to 280F in less than 2 seconds. This is not only hard on the converter and trans but causes inconsistency in the vehicle elapsed time. Neither of which is a good thing. The solenoid powers the cylinder in both directions. When you activate the unit the throttle pedal goes to the floor and the car continues to idle. When you release the unit the throttle pedal is already on the floor held there now by your foot and the cylinder is powered in the other direction to open the throttle. By installing a optional bleed valve you can regulate how quick the cylinder will open.

Stage control kit (less cylinder and regulator)............... 53702-00001
Includes dual acting solenoid, dual acting push pull cylinder and quick release line kit.
Stage control valve only ............................................. 53702-00010
Stage control cylinder................................................. 53702-00011
Stage control cylinder slide stop ................................. 53702-00012
Stage control cylinder quick release ball joint .............. 53702-00014
Stage control line kit with quick release connectors ..... 53702-00015
Stage control CO2 cylinder ........................................ 53702-00016
Stage control CO2 cylinder mount clamp (CNC billet)  53702-00017
Stage control kit CO2 cylinder regulator ...................... 53702-00018
Stage control kit CO2 cylinder regulator nipple & nut .. 53702-00019
Stage control bleed valve ............................................ 53702-00025

Powerglide shifter information click here

Pedals -Clutch and Brake -----------------------------------
See pedal assemblies below for complete sets
53535-01000 Brake pedal, tubular, adjust-a-rail mount

18535-00006 Brake pedal 1/4" thick with pad and boss
33535-00006 Clutch pedal 1/4" thick with pad and boss
33535-00010 Clutch pedal 3/8" thick with pad and boss

33535-10001 Clutch pedal for RED adjust-a-rail pedal

53708-02500 Clutch and throttle pedal travel stop Weld-On

Pedals -Throttle pedal ----------------------------------------
Throttle pedals

53535-29010 Throttle pedal, CNC Billet aluminum, 8" x 4" w/ 1/4" hole, heel pivot
53535-29020 Throttle pedal, CNC Billet aluminum, 11" x 3 1/2" w/ 1/4" hole, heel pivot
53535-29030 Throttle pedal, CNC Billet aluminum, 11" x 3 1/2" w/ 1/4" hole, ankle pivot
53535-01101 Throttle pedal, tubular, 1/4" mount, heel pivot, side toe strap
53535-01102 Throttle pedal, tubular, 1/4" mount, ankle pivot, side toe strap
53535-01111 Throttle pedal, tubular, 1/4" mount, heel pivot, top toe strap
53535-01112 Throttle pedal, tubular, 1/4" mount, ankle pivot, top toe strap

53090-13269 Throttle pedal return spring kit
53090-13263 Return spring throttle pedal bracket
53090-13243 Return spring adjust-a-rail bracket
53680-12390 Spring, throttle return 3/8" x 6.5"
53708-36041 Throttle stop slide for adjust-a-rail pedal assembly
53605-06500 Throttle stop rod for adjust-a-rail pedals
53090-13243 Throttle pedal return spring mount 1.5 bolt center
53090-13253 Throttle pedal return spring mount .5 bolt center
53090-13263 Throttle pedal return spring mount .625 bolt center
11735-25002 Throttle cable mount (adjust-a-rail) 1.5" bolt center
53155-01000 Cable housing quick release clip (stainless steel)
53155-32620 Cable clamp .(Full clamp)
53155-32621 Cable clamp .(1/2 clamp)
53155-32720 Cable clamp .(Dual 1/2 clamp for twin chutes)
53140-10000 Parachute release cable jacket 3/16 dia
53140-20000 Parachute release cable wire .062 dia
53347-10100 3/16 Male thread (SAE) 3/16" Cable end
53347-10200 1/4 Male thread (SAE) 1/4" Cable end
53155-01000 Cable housing quick release clip (stainless steel)
53385-13020 Enderle throttle arm return spring mount
53385-13406 Carb throttle cable (Morris) mount

53708-02500 Clutch and throttle pedal travel stop Weld-On

Pedal assembles -----------
  Adjust-a-rail installed in DRS car
53035-10000 Complete dragster pedal adjust-a-rail assembly kit (select the width)
Brake and throttle control - Includes 2, six position adjust-a-rails, the pedal bar, one tubular chromoly steel brake pedal, one tubular chromoly steel throttle pedal, complete set of pedal bushings, complete set of snap locating rings, throttle cable chassis mount with six positions, adjustable throttle cable travel stop, the return spring mounts (billet CNC aluminum), 2, 3/16" cable ends, master cylinder chassis mount

Adjust-a- rail pedal parts ------------------------------------
53130-00100 Dragster pedal replacement bushing
53167-00200 Dragster pedal replacement circlip

Brake pedal                  Throttle pedal      Clutch pedal
53535-01000 Dragster pedal replacement- brake (adjust-a-rail mounting)
33535-10001 Dragster pedal replacement - clutch  (adjust-a-rail mounting)
53535-01100 Dragster pedal replacement - throttle(adjust-a-rail mounting)

53708-36049 Throttle stop slide assembly for adjust-a-rail pedal assembly
                    1 - 53708-36041 slide stop
                    1 - 53605-06500 stop rod
                    1 - 53347-10100 3/16" ball joint
                    1 - 10-32 nut
                    1 - 10-32 lock nut

Dragster clutch controls

33535-00006 Clutch pedal 1/4" thick with pad and boss
33535-00010 Clutch pedal 3/8" thick with pad and boss

33535-10001 Clutch pedal for RED adjust-a-rail pedal 

 
33030-27176 Clutch idler arm 1 Hole 7" c-c
33030-27186 Clutch idler arm 1 Hole 8" c-c
33030-27206 Clutch idler arm 2 Hole support plate
33030-27276 Clutch idler arm 2 Hole 7" c-c
33030-27286 Clutch idler arm 2 Hole 8" c-c
33030-27406 Clutch idler arm 4 Hole support plate
33030-27476 Clutch idler arm 4 Hole 7" c-c
33030-27486 Clutch idler arm 4 Hole 8" c-c

Funny Car / Altered clutch pedal

33535-10001 Funny Car /Altered clutch pedal kit, includes pedal and pad assembly, weld on
                       pivot with bearing, spherical rod end turnbuckle, cross link arm and arm
                       mounting ring.
33535-29650 Funny Car /Altered clutch pedal with pad CNC machined billet aluminum pedal
                        and pad assembly
33535-29750 Funny Car /Altered clutch shaft arm, CNC machined billet aluminum
33535-29746 Funny Car /Altered clutch shaft arm mounting ring
33535-29659 Clutch pedal assembly only FC/A for top of bell housing

Have you flowed your fuel system ? Flowing your fuel system will create a "map" of the fuel curve and assist you in making good tuning decisions.

Throttle cable mount at carburetor ------------------------
Tray reinforcing plate (top plate) shown with tray mount (bottom plate) that installs under the carburetor. Shown with hex risers and throttle cable and mounts.

The tray mount goes under carburetor to provide a platform to mount the tray and the throttle cable to. It is drilled for the throttle cable quick release clamp to bolt to. This tray mount eliminates the need for the ugly and weak straps used to mount some scoop trays with. The tray mount is designed to clear all the parts of the carburetor that a racer will need to get to for tuning and maintaining the fuel system on the race car.

The complete mounting kit is consists of:
1.  Tray reinforcing plate (top plate) (select size based on type of carb)
2.  Hex risers 4 ea. (select size based on type of carb)
3.  Tray mount (select based on carb size and throttle bore size)
Note your application may use a push pull cable so getting a Quick Disconnect clamp and Quick Disconnect ball joint may be a good idea.
For more throttle control hardware click here

Tray mount - Standard (4150 Series Carb) -------------------
53385-38446 Tray mount 4150 Series carburetor 1 9/16" throttle bores 
53385-38456 Tray mount 4150 Series carburetor 1 5/8" throttle bores 
53385-38466 Tray mount 4150 Series carburetor 1 11/16" throttle bores 
53385-38476 Tray mount 4150 Series carburetor 1 3/4" throttle bores
53385-38486 Tray mount 4150 Series carburetor Open center throttle bores 
Anodizing black add $ 20.00

Throttle cable mount at fuel injection --------------------

Bellcrank

53065-89331 Bellcrank 90 degree, 1.75" arm, 1/4" bearing pivot, CNC billet aluminum

Levers (Throttle shaft) ------------------------------------

From the left of photo above
Enderle splined throttle shaft 7/16 x 36 spline part number 35030-40112
        Dimension - short end to center of shaft is 1.312"
                         - long end to center of shaft is 1.312" to first hole and 1.7" to second hole   
Enderle throttle splined shaft 5/16 x 36 spline part number 35030-40111
        Dimension - short end to center of shaft is 1.312"
                         - long end to center of shaft is 1.312" to first hole and 1.7" to second hole   
Enderle throttle splined shaft 5/16 x 36 spline part number 35030-40111
        Dimension - end to center of shaft is 1.312"
Hilborn throttle smooth shaft 5/16" part number 35030-40190
        Dimension - end to center of shaft is 1.187"  Will fit Kinsler FI systems as well.

Neat linkage assembly
Example of what can be done with some 5/16" shafting and some 5/16" hiem joints and the 5/16" levers. Make some brackets to hold the 5/16" hiem ends (they are self aligning) and run the shaft throught the hiem ends and install the 5/16" arms and connect to the carb or fuel injection.

Fuel shut off lever -----------------------------------------------
Fuel shut off lever
53360-22123 Fuel shut off lever 3mm thick - Chassis mount
53360-22126 Fuel shut off lever 6mm thick - Chassis mount
53155-32621 Cable clamp (1/2 clamp)
53347-10100 3/16 Male thread (SAE) 3/16" Cable end
11735-21503 Steel weld on bracket

Fuel shut off cable mount at pump -------------------------
Fuel shut off brackets
53090-35073 Enderle 80A and Hilborn 150A fuel shut off cable mount/select color
53090-35113 Enderle 990-1100 fuel shut off cable mount 
53090-35173 Enderle 990-1100 fuel shut off cable mount double cable mounting
                            (front and/or side)
53155-01000 Throttle bracket quick release clip
53347-10100 3/16 Male thread (SAE) 3/16" Cable end

 
Enderle fuel shut off over center spring mount
53090-35206 1.495 dia housing - Gold annodize
53090-35306 1.295 dia housing - Red annodize
53347-10100 3/16 Male thread (SAE) 3/16" Cable end

Parachute lever -------------------------------------------------

53360-22143 Parachute lever 3mm thick (1/8") - chassis mount
53360-22146 Parachute lever 6mm thick (1/4") - chassis mount
53360-22183 Parachute lever 3mm (1/8") - Roof mount
53360-22186 Parachute lever 6mm (1/4") - Roof mount
53155-01000 Cable housing quick release clip (stainless steel)
53155-32620 Cable clamp .(Full clamp)
53155-32621 Cable clamp .(1/2 clamp)
53155-32720 Cable clamp .(Dual 1/2 clamp for twin chutes)
53140-10000 Parachute release cable jacket 3/16 dia
53140-20000 Parachute release cable wire .062 dia
53347-10100 3/16 Male thread (SAE) 3/16" Cable end
53165-10000 Clevis 3/16 unf with 3/16" pin

Push pull cables ------------------------------------------------
3/16" unf thread (10-32 tpi) with mounting slots each end.
Includes dust caps and lock nuts.
Cable jacket is smooth red nylon and the hardware is stainless.

53140-00100 Push pull control cable 39" or 3'3"
53140-00125 Push pull control cable 49" or 4'1"
53140-00150 Push pull control cable 59" or 4'11"
53140-00175 Push pull control cable 69" or 5'9"
53140-00200 Push pull control cable 79" or 6'7"
53140-00225 Push pull control cable 89" or 7'5"
53140-00250 Push pull control cable 01" or 8'5"
53140-00275 Push pull control cable 08" or 9'0"
53140-00300 Push pull control cable 18" or 9'10"
53140-00325 Push pull control cable 28" or 10'8"
53140-00350 Push pull control cable 38" or 11'6"
53140-00375 Push pull control cable 48" or 12'4"
53140-00400 Push pull control cable 58" or 13'2"
53140-00425 Push pull control cable 67" or 13'11"
53140-00450 Push pull control cable 77" or 14''9"
53140-00475 Push pull control cable 87" or 15'7"
53140-00500 Push pull control cable 97" or 16'5"

There are two ways to hold the ends of the cable housing. One is to use a clamp listed below. Use either a full or a half clamp. The half clamp takes up less space and allows the cable to be mounted closer to the mounting bracket. The other way to hold the end of the cable housing is with a quick release clamp. These quick release clamps are very handy when used around the engine and transmission as they allow the maintenance work on the engine and trans to be done faster as they just unsnap from the clamp. Also the logical choice here is to use the quick release ball joints as well. With the quick release ball joints all you have to do is to pull the collar back and the joint releases from the ball allowing a very fast release yet a very secure connection. See the cable threaded end connections section.

Cable housing clamps -----------------------------------------

53155-32620 Cable clamp (full clamp)
53155-32621 Cable clamp (1/2 clamp) CNC machined billet aluminium with 3/16" mounting
                         hole to secure cable housing to bracket
53155-01000 Cable bracket quick release clip. Stainless steel with 6 ea 3/16" adjustable
                         mounting holes

53240-90000 Parachute cable housing end. When the cable jacket is cut to length for the parachute installing this housing end will prevent the wire supports in the housing from snagging the parachute release cord This housing end is installed with two small set screws.(supplied)

Cable threaded end connections -----------------------------
3/16" unf (10-32 tpi) cable ends
 
53165-10000 Clevis 3/16 unf with 3/16" pin

53347-10100 3/16 Male thread (SAE) 3/16" Cable end
53347-10200 1/4 Male thread (SAE) 3/16" Cable end
53347-10300 5/16 Male thread (SAE) 3/16" Cable end

Brake handles ----------------------------------------------------
18360-22316 FC/A & FED 45 degree brake lever 24" (no boss)
18360-22326 FC/A & FED 45 degree push brake lever 24" with boss
18360-22336 FC/A & FED 45 degree pull brake lever 24" with boss
Dual chute release cables
18360-22326 Brake lever accessory lever assembly & mount kit

18360-22486 RED 25 degree brake lever 19.50" long no boss
18360-22496 RED 25 degree brake lever 19.50" long with boss

Grip set for all 25 degree handles
18360-22613 Grip set with screws, 25 degree brake lever black anodised
18360-22614 Grip set with screws, 25 degree brake lever red anodised
18360-22615 Grip set with screws, 25 degree brake lever blue anodised
18360-22616 Grip set with screws, 25 degree brake lever purple anodised
18360-22616 Grip set with screws, 25 degree brake lever gold anodised
18360-22626 Brake lever accessory lever assembly

Air shift kit -----------------------------------------------------

84350-00200 2 speed Lenco type air shift kit (less lines)
84350-00300 3 speed Lenco type air shift kit (less lines)
84350-00400 4 speed Lenco type air shift kit (less lines)
84350-00500 5 speed Lenco type air shift kit (less lines)

Quick disconnect air line kits include all the fittings and all the line needed to install the air shift kits.
84350-00210 Air shift quick disconnect line kit 2 speed
84350-00310 Air shift quick disconnect line kit 3 speed
84350-00410 Air shift quick disconnect line kit 4 speed
84350-00510 Air shift quick disconnect line kit 5 speed
84775-01200 Lenco type shift button / valve assembly only
84583-19000 Lenco type air regulator assembly (less nipple)
84648-00025 Lenco type trans shifter pot (centre trans mount type)
Quick disconnect air line fittings - push on connections 250 psi rated
84248-24001 Connector 1/8" male pipe thread x 1/4" nylon tubing
84248-24002 Connector 1/4" male pipe thread x 1/4" nylon tubing
84248-31001 Elbow 1/8" male pipe thread x 1/4" nylon tubing
84248-31002 Elbow 1/4" male pipe thread x 1/4" nylon tubing
84248-89001 Tee Union 1/8" male pipe thread x 1/4" nylon tubing
84248-89002 Tee Union 1/4" male pipe thread x 1/4" nylon tubing
84248-89011 Tee Run 1/8" male pipe thread x 1/4" nylon tubing
84248-89012 Tee Run 1/4" male pipe thread x 1/4" nylon tubing
84248-89021 Tee Branch 1/8" male pipe thread x 1/4" nylon tubing
84248-89022 Tee Branch 1/4" male pipe thread x 1/4" nylon tubing
84248-91004 1/4" nylon tubing 300 psi rating ........(per foot)
84090-84375 4.375" Flat back bottle mount (Lenco bottle)
84090-94375 Bottle mount bracket mount (fits 84090-84375 bracket)Bracket welds to chassis upright to provide a place to mount the bottle bracket.
84105-01011 Lenco air bottle (small) 2.0" dia
84105-01021 Lenco air bottle (large) 4.375" dia

Reverser levers ------------------------------------------------

53360-22900 Reverser lever for Lenco (Weld on) Funny car/Altered
53360-22956 Reverser lever for Dragster CNC milled aluminium
53090-22986 Lenco reverser cable mounting bracket for Quick Clip
                      Early model Lenco - centre mount shift towers (2 hole)
53155-01000 Cable bracket quick release clip
                      Stainless steel with 6 ea 3/16" adjustable mounting holes
53090-22989 Lenco reverser cable mounting Quick Clip - bracket and clip is
                       one piece. Second generation Lenco - offset mount shift
                       towers (1 hole)

Powerglide Shifter assembly ---------------------------------
Powerglide shifter designed for centre steer cars to mount on the right side where the brake handle would go if the car had a clutch. Ultra slim design takes up almost no cockpit space as most of the shifter will mount between the side chassis rails.

32648-10000 Powerglide shifter basic kit

Shift lever hand grips.
CNC machined from billet aluminium and polished and anodised in choice of colours.

18360-22613 Grip set with screws, 25 degree brake lever black anodised
18360-22614 Grip set with screws, 25 degree brake lever red anodised
18360-22615 Grip set with screws, 25 degree brake lever blue anodised
18360-22616 Grip set with screws, 25 degree brake lever purple anodised
18360-22616 Grip set with screws, 25 degree brake lever gold anodised

32648-31125 Powerglide trans shift lever (weld on)


53155-01000 Cable bracket quick release clip
                    Stainless steel with 6 ea 3/16" adjustable mounting holes

53347-10100 3/16 Male thread (SAE) 3/16" Cable end

32350-00001 Powerglide shifter park start switch kit Includes park start
                    switch, mount bracket and spacer and mounting hardware
32090-31043 Powerglide shifter park start switch mount bracket
32090-31050 Powerglide shifter park start switch mount bracket spacer
32090-00001 Powerglide shifter park start switch

    Electric shift solenoid
Use the rpm activated switch on the MSD to trigger the gear change for the maximum consistency.

Have you flowed your fuel system ? Flowing your fuel system will create a "map" of the fuel curve and assist you in making good tuning decisions.

 Spherical rod ends ---------------------------------------------

Special rod ends for high performance 4 links
53610-09118 Chromoly spherical rod end 3/4" unf (RHT) x 5/8" mount hole
53610-09128 Chromoly spherical rod end 3/4" unf (LHT) x 5/8" mount hole

Standard - spherical rod ends
FRA = Female, Right hand thread, Aurora
53610-01011 FRA 3/16 female thread (SAE) and hole size
53610-01012 FRA 1/4 female thread (SAE) and hole size
53610-01013 FRA 5/16 female thread (SAE) and hole size
53610-01014 FRA 3/8 female thread (SAE) and hole size
53610-01015 FRA 7/16 female thread (SAE) and hole size
53610-01016 FRA 1/2 female thread (SAE) and hole size
53610-01017 FRA 5/8 female thread (SAE) and hole size
53610-01018 FRA 3/4 female thread (SAE) and hole size

FLA = Female, Left hand thread, Aurora
53610-01021 FLA 3/16 female thread (SAE) and hole size
53610-01022 FLA 1/4 female thread (SAE) and hole size
53610-01023 FLA 5/16 female thread (SAE) and hole size
53610-01024 FLA 3/8 female thread (SAE) and hole size
53610-01025 FLA 7/16 female thread (SAE) and hole size
53610-01026 FLA 1/2 female thread (SAE) and hole size
53610-01027 FLA 5/8 female thread (SAE) and hole size
53610-01028 FLA 3/4 female thread (SAE) and hole size

MRA = Male, Right hand thread, Aurora
53610-01111 MRA 3/16 male thread (SAE) and hole size
53610-01112 MRA 1/4 male thread (SAE) and hole size
53610-01113 MRA 5/16 male thread (SAE) and hole size
53610-01114 MRA 3/8 male thread (SAE) and hole size
53610-01115 MRA 7/16 male thread (SAE) and hole size
53610-01116 MRA 1/2 male thread (SAE) and hole size
53610-01117 MRA 5/8 male thread (SAE) and hole size
53610-01118 MRA 3/4 male thread (SAE) and hole size

MLA = Male, Left hand thread, Aurora
53610-01121 MLA 3/16 male thread (SAE) and hole size
53610-01122 MLA 1/4 male thread (SAE) and hole size
53610-01123 MLA 5/16 male thread (SAE) and hole size
53610-01124 MLA 3/8 male thread (SAE) and hole size
53610-01125 MLA 7/16 male thread (SAE) and hole size
53610-01126 MLA 1/2 male thread (SAE) and hole size
53610-01127 MLA 5/8 male thread (SAE) and hole size
53610-01128 MLA 3/4 male thread (SAE) and hole size

FLN = Female, Left hand thread, Nylon bearing
53610-02021 FLN 3/16 female thread (SAE) and hole size
53610-02022 FLN 1/4 female thread (SAE) and hole size
53610-02023 FLN 5/16 female thread (SAE) and hole size
53610-02024 FLN 3/8 female thread (SAE) and hole size
53610-02025 FLN 7/16 female thread (SAE) and hole size
53610-02026 FLN 1/2 female thread (SAE) and hole size
53610-02027 FLN 5/8 female thread (SAE) and hole size
53610-02028 FLN 3/4 female thread (SAE) and hole size

MRN = Male, Right hand thread, Nylon bearing
53610-02111 MRN 3/16 male thread (SAE) and hole size
53610-02112 MRN 1/4 male thread (SAE) and hole size
53610-02113 MRN 5/16 male thread (SAE) and hole size
53610-02114 MRN 3/8 male thread (SAE) and hole size
53610-02115 MRN 7/16 male thread (SAE) and hole size
53610-02116 MRN 1/2 male thread (SAE) and hole size
53610-02117 MRN 5/8 male thread (SAE) and hole size
53610-02118 MRN 3/4 male thread (SAE) and hole size

FLB = Female, Left hand thread, Brass bearing
53610-03021 FLB 3/16 female thread (SAE) and hole size
53610-03022 FLB 1/4 female thread (SAE) and hole size
53610-03023 FLB 5/16 female thread (SAE) and hole size
53610-03024 FLB 3/8 female thread (SAE) and hole size
53610-03025 FLB 7/16 female thread (SAE) and hole size
53610-03026 FLB 1/2 female thread (SAE) and hole size
53610-03027 FLB 5/8 female thread (SAE) and hole size
53610-03028 FLB 3/4 female thread (SAE) and hole size

MRB = Male, Right hand thread, Brass bearing
53610-03111 MRB 3/16 male thread (SAE) and hole size
53610-03112 MRB 1/4 male thread (SAE) and hole size
53610-03113 MRB 5/16 male thread (SAE) and hole size
53610-03114 MRB 3/8 male thread (SAE) and hole size
53610-03115 MRB 7/16 male thread (SAE) and hole size
53610-03116 MRB 1/2 male thread (SAE) and hole size
53610-03117 MRB 5/8 male thread (SAE) and hole size
53610-03118 MRB 3/4 male thread (SAE) and hole size

MLB = Male, Left hand thread, Brass bearing
53610-03121 MLB 3/16 male thread (SAE) and hole size
53610-03122 MLB 1/4 male thread (SAE) and hole size
53610-03123 MLB 5/16 male thread (SAE) and hole size
53610-03124 MLB 3/8 male thread (SAE) and hole size
53610-03125 MLB 7/16 male thread (SAE) and hole size
53610-03126 MLB 1/2 male thread (SAE) and hole size
53610-03127 MLB 5/8 male thread (SAE) and hole size
53610-03128 MLB 3/4 male thread (SAE) and hole size

Have you flowed your fuel system ? Flowing your fuel system will create a "map" of the fuel curve and assist you in making good tuning decisions.