Turbo Cam

[Turbo V6 Camaro]

Originally posted by nocutt:
98 camaro 3.8 YOU ARE absolutely right with those values cams specs are

Duration I/E Lift I/E LS IC Rocker Ratio Valve Lift I/E
Stock GM 182 190 .258 .255 115 111 1.6 .413 .408
giving theoretical valve timings of...

Ivo = -20 atdc
Ivc = -18 bbdc
Ecl = 119
Evc = -24 btdc
Evo = -14 abdc
Overlap = -44

I crunch the number with formulas so someone go over them with desktop dyno or something...

The cam specs I had were completely different from those posted...I apologise, now which is correct???? can anyone corraborate this specs...I find it odd that a OE will grind negative overlap into a stock cam with Sh!tty heads???
If the specs are correct at the advertized durations it will potentially mean that this stock cam is turbo favored...unfortunately more lift is definately needed...

that could explain why our cars are responding to turbos better

my cam is
@.50 224/215* and .536/.534 116* LSA

what my over lap? i dont have the program any more

i think it's -12.......
IVO: 2 BTDC
IVC: 42 ABDC
EVO: 49 BBDC
EVC: -14 BTDC

edit found this
has an Overlap of -12.00 degrees and has in Intake Duration of 224.00 degrees. The Exhaust Duration is 215.00 degrees. The Inlet Cam has an Installed Centerline of 110.00

[ April 22, 2005, 05:42 PM: Message edited by: viper04af ]

[98Camaro3.8]

For future reference, the equation is:

(((INTDUR + EXHDUR) / 4) - LSA) * 2

[38fury]

Well, we have the same cam as a GTP, that would be a good indicator of why the V6 responds to boost so well.

[RedFrk13]

Originally posted by 38fury:
Well, we have the same cam as a GTP, that would be a good indicator of why the V6 responds to boost so well.

Yeah, but they dont have a restriction on the exhaust.