CAM TALK

[Guest Gp crazy]

WELL I OWN A 1989 GP SE 5 SPEED THE ENGINE I HAD BULIT HAS THIS CAM IN IT MELLING MTC-5 WHICH ====

LIFT GVL .50 SAE DURATION ? WHAT IS THIS ?

 

I 280 I 420 I 204 I 278

 

E 295 E 443 E 214 E 288

IS THIS TO MUCH?? WHICH NUMBER AM I WORRIED ABOUT?

THANKS JEFF

IDLE IS A LITTLE ROUGH THAT WHY IM ASKING ?

ALSO UNDER A LOAD UP HILL THE ENGINE WANT'S TO DIE OR CUT OUT AT 3500 RPMS. I THOUGHT THE VACUME WAS TO LOW BUT I HAVE 18 IN AT IDLE. 8)

[93CutlassSupreme]

a performance cam won't have a smooth idle, a smooth idling cam won't make power

 

you can't have it both ways

 

what does it do at 3500?

[Robby1870]

All those numbers mean the following:

 

intake lift @ valve: .420"

exhaust lift @ valve: .443"

(these are calculated with a 1.5 rocker ratio)

 

Intake duration @ .050": 204 degrees

Exhaust duration @ .050": 214 degrees

 

Advertised intake duration: 278 degrees

Advertised exhaust duration: 288 degrees

 

Intake lift at cam lobe: .280"

Exhaust lift at cam lobe: .295"

[Guest Gp crazy]

AT 3500 IN 5 GEAR WHICH IS 70 MPH OR BETTER . IT ACT'S LIKE A BAD COIL OR ICM UNSURE ? I HEARD OF FUEL CUT OFF IS THIS TRUE? AM HITTING IT OR EVEN CLOSE TO IT ? GOING TO REPLCE FUEL FILTER AND GO FROM THERE, PSI IS AROUND 38-42. JUST GOING TO ONE THING AT A TIME.