Titanium Valves Light, strong, and reliable, Del West valves are manu- factured using military spec. titanium for weight savings of approximately 40% over steel alloys. Radius-style lock grooves reduce valve stem and tip stress, and require radius style valve locks. Sold in sets of eight. 11/32" Titanium Valves Part No. Description Type Head Dia.
Super 7° Titanium “Non-Shoulder” Valve Locks Lightweight, non-shoulder type 7° titani- XPORFNVDUHDPRQJWKH¿QHVWDQGPRVW
reliable. 100% CNC-machined locks will save 3-4 grams and DVVXUHDVXSHULRUYDOYHVWHP¿W6ROGLQVHWVRISDLUV
Stem Diameter 11/32" 11/32"
Installed Height -.050"
Part No.
Style
DEL689-C-16 DEL690-C-16 DEL693-C-16
Radius Radius Radius
Standard Standard
Overall Length
5/16"
DELEV1600-2T-CRST-8 DELEV1625-6T25-CRST-8 DELEV1625-7T-CRST-8 DELIV2080-1T-CRST-8 DELIV2080-2T-CRST-8 DELIV2100-2T-CRST-8 DELIV2180-6T-CRST-8
+.200" Long +.600" Long +.700" Long +.100" Long +.200" Long +.200" Long +.600" Long
Exhaust 1.600" 5.140" Exhaust 1.625" 5.540" Exhaust 1.625" 5.540" Exhaust 1.625" 5.640" Intake 2.080" 5.040" Intake 2.080" 5.140" Intake 2.100" 5.140" Intake 2.180" 5.540"
Super 7° Standard and “LTW” Titanium Retainers Retainers are CNC-ma- chined from billet titanium, heat-treated for maximum strength, and offered in standard or “LTW” lightweight designs. “LTW”
DELEV1625-6T-CRST-8 +.600" Long/25° Seat
Super 7° Titanium “Shoulder” Valve Locks Lightweight locks are machined from high-quality titanium. Sold in sets of 16 pairs. Part No. Stem Diameter Installed Height Style DEL790-C-16 11/32" Standard Radius DEL791-C-16 11/32" +.050" Radius DEL792-C-16 5/16" -.050" Radius DEL793-C-16 5/16" Standard Radius DEL794-C-16 5/16" +.050" Radius
retainers have a compound radius, created by removing material from the inner body, to minimize weight without compromising strength. Sold in sets of 16.
Dimensions
Valve Spring
Part No.
A
B
C
D
“LTW” Retainers DEL510-LTW-16
Double 1.450" 1.120" .730" Double 1.450" 1.140" .745"
— —
DEL515-LTW-16
Standard Retainers DEL515-16
Double 1.500" 1.140" .745" Double 1.495" 1.155" .835" Double 1.500" 1.180" .775"
— — —
DEL530B-16 DEL550B-16
Detroit Truetrac Truetrac’s proven helical gear design eliminates friction plates, cones, and springs for maintenance-free traction. Power transfer is so smooth, it literally goes unnoticed by
CTR CTR (Circle Track Racing) differentials are engineered exclusively for left turn racing. CTR provides 100% traction to the left rear wheel and differential action to the right rear
the driver. Proven design, low cost, and effective performance make the Truetrac limited slip differential the ideal choice for a wide variety of vehicles.
ZKHHO,GHDOO\VXLWHGIRUODWHPRGHOVGLUWPRGL¿HGV or sprints, the CTR allows the driver to stay on the gas longer, enter the turns deeper, and get back on the gas sooner for higher exit speeds.
Axle Dia.
Axle Spline
Part No.
Description
Ratios
DET911A319 DET911A415
GM 7.5", 10-Bolt, 1975-89 1.16" 26 3.23-Up
Axle Dia.
Axle Spline
Part No.
Description
Ratios
GM 7.5", 10-Bolt, 1975-89 1.16" 26 3.08-Down DET912A317 GM 7.5"/7.6", 10-Bolt, 1988-05 1.20" 28 3.23-Up DET912A616 Ford 8", Up to 1978 — 28 3.25-Up DET912A587 Ford 9", 1957-79 1.20" 28 All DET913A481 GM 8.5", 10-Bolt, 1988-96 1.32" 30 2.73-5.13 DET913A586 Ford 9", 1957-79 1.32" 31 All Exc. 2.72 Detroit Locker DET187SL17B The Detroit Locker, engineered for 1976-87 Ford 9" rears with 31-spline axles, maximizes traction by delivering 100% of the available power to both drive wheels. Engineered to keep both wheels in a constant drive mode, differential has the ability to auto- matically allow wheel speed differentiation when required. NOTE: Compatible with all ring and pinion ratios except 2.72.
DETR18703A
CTR, Ford 9"
1.32" 31 All Exc. 2.72
Eaton Posi Automatic limited-slip units with carbon friction clutches and forged gears consis- tently and reliably deliver equal power to both wheels. Units are rebuildable.
Axle Spline Ratios
Part No.
Description
Axle Dia.
DET19557-010 GM 8.5", 10-Bolt Car, 1971-89 1.20" 28 2.73-Up DET19559-010 GM 8.5", 10-Bolt Car, 1988-96 1.32" 30 2.73-Up DET19603-010 GM 8.2", 10-Bolt Car, 1964-72 — 28 3.08-Up DET19663-010 GM 7.5", 10-Bolt, 1975-89 1.16" 26 3.23-Up
322
CIRCLE TRACK 2021-22
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