Twin Turbo 408 camshaft
03-02-2014 | 09:56 PM
#1
Twin Turbo 408 camshaft Building a 408 Twin Turbo w/ up and forward headers, turbos located in fuse box and battery areas. Here are the specs on the cam I have now. Let me know if I should make another camshaft selection. Car is pretty much stock weight.
0.006 0.050 0.200
Intake Duration - ID (first number) 271 222 144
Exhaust Duration - ED (second number) 287 238 159
Lobe Center Angle - LCA (also known as LSA) 114 114 114
Intake Centerline - ICL (LSA - degrees of advance e.g. 114+2 = 112) 110 110 110
Intake Valve opens - IVO 25.5 1 -38 BTDC (- indicates ATDC)
Intake Valve closes - IVC 65.5 41 2 ABDC
Exhaust Valve Opens - EVO 81.5 57 17.5 BBDC
Exhaust Valve Closes - EVC 25.5 1 -38.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 118 118 118
Overlap 51 2 -76.5 degrees
Mods
Twin T76 .81AR turbos
1 7/8" up and forward headers bottlenecked down to 2 1/2" from the collectors to the turbos then 3" downpipe for each turbo
E85
twin fuel pumps delivering 3.1 gallons per minute
128lb injectors
twin air/water intercoolers with 5 gallon ice tank
eagle 4" crank
J&E 4.030 forged pistons
eagle forged H-beam rods
SD tuned
T56 for now but moving to a 4L80e as the viper spec T56 wont hold the power
3.50 gears on a midwest chassis and performance fab 9
0.006 0.050 0.200
Intake Duration - ID (first number) 271 222 144
Exhaust Duration - ED (second number) 287 238 159
Lobe Center Angle - LCA (also known as LSA) 114 114 114
Intake Centerline - ICL (LSA - degrees of advance e.g. 114+2 = 112) 110 110 110
Intake Valve opens - IVO 25.5 1 -38 BTDC (- indicates ATDC)
Intake Valve closes - IVC 65.5 41 2 ABDC
Exhaust Valve Opens - EVO 81.5 57 17.5 BBDC
Exhaust Valve Closes - EVC 25.5 1 -38.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 118 118 118
Overlap 51 2 -76.5 degrees
Mods
Twin T76 .81AR turbos
1 7/8" up and forward headers bottlenecked down to 2 1/2" from the collectors to the turbos then 3" downpipe for each turbo
E85
twin fuel pumps delivering 3.1 gallons per minute
128lb injectors
twin air/water intercoolers with 5 gallon ice tank
eagle 4" crank
J&E 4.030 forged pistons
eagle forged H-beam rods
SD tuned
T56 for now but moving to a 4L80e as the viper spec T56 wont hold the power
3.50 gears on a midwest chassis and performance fab 9
Last edited by sschoeffler; 03-02-2014 at 10:35 PM.
03-04-2014 | 05:05 PM
#6
Weekend warrior...Stomp the **** out of anyone who thinks they are feeling froggy. Keep all my luxury items like traction control, leather seats, power windows and A/C and still retain 1200hp under the hood. That kind of car...
03-04-2014 | 05:42 PM
#7
I just called comp cams and this is what they spec'd me
239/243 114LSA .624 lift
I'm thinking that wont be a very good cam for this motor. I thought the split had to be more because of the LS3 heads. Lets hear your thoughts
239/243 114LSA .624 lift
I'm thinking that wont be a very good cam for this motor. I thought the split had to be more because of the LS3 heads. Lets hear your thoughts
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03-05-2014 | 06:31 AM
#12
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edited by your friendly neighborhood admin - orangeapeel
edited by your friendly neighborhood admin - orangeapeel
Last edited by orangeapeel; 03-28-2014 at 05:16 PM. Reason: Non-sponsor spam
