Am i shifting too early 6.0 max 6300 rpm ls9 cam
11-16-2011, 08:15 PM
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Am i shifting too early 6.0 max 6300 rpm ls9 cam
IM SHIFTING MY TRUCK AT 6300 AM I SNUFFING IT OFF, THOUGHT THE LS9 CAMS MAKE POWER UP HIGHER THOUGHT SOMEONE HAD A DYNO SHEET WHERE IT MADE MOST OVER 5500.IM RUNNING 7.5 POUNDS OF BOOST IS THAT LOW,WHAT GAINS CAN I SEE IF I GET IT AROUND 10PSI?i DRAILY DRIVE THIS TRUCK BUT I HAVE A VERY HEAVY FOOT LOL!!!ALSO DO YOU GUYS HAVE FIRST,SECOND THRID GEAR SHIFT AT SAME RPM
11-16-2011, 09:13 PM
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The LS9 cam has an IVC (Intake Valve Closing) point of about 46 degrees so it should peak at 6300+ rpms. If I were tuning for that cam I'd have the shift points around 6500-6600 rpms.
Last edited by KLUG'S SS; 11-16-2011 at 09:35 PM.
12-03-2011, 07:42 AM
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Hey That's great info - do you know where I can get the rest of the info for this cam -was looking for intake and exhaust valve closing and opening and full duration.
Thanks
Thanks
12-05-2011, 08:31 PM
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Here you go man, full LS9 cam specs: .004 duration 277/295
.050 duration 211/230
lift .562/.558
int. open@.004 8 BTDC
int. close@.004 89 ABDC
int. open@.050 18 ATDC
int. close@.050 49 ABDC
exh. open@.004 84 BBDC
exh. close@.004 31 ATDC
exh. open@.050 56 BBDC
exh. close@.050 6 BTDC
LSA 122.5
12-05-2011, 08:59 PM
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Here you go man, full LS9 cam specs: .004 duration 277/295
.050 duration 211/230
lift .562/.558
int. open@.004 8 BTDC
int. close@.004 89 ABDC
int. open@.050 18 ATDC
int. close@.050 49 ABDC
exh. open@.004 84 BBDC
exh. close@.004 31 ATDC
exh. open@.050 56 BBDC
exh. close@.050 6 BTDC
LSA 122.5
.050 duration 211/230
lift .562/.558
int. open@.004 8 BTDC
int. close@.004 89 ABDC
int. open@.050 18 ATDC
int. close@.050 49 ABDC
exh. open@.004 84 BBDC
exh. close@.004 31 ATDC
exh. open@.050 56 BBDC
exh. close@.050 6 BTDC
LSA 122.5
12-07-2011, 09:20 AM
#6
Did you put it on the dyno to see where the cam stops making power and how much it drops off from the peak hp rpm to say 6500-6600?
If the cam stops making power at say 6200 then slowly drops power till say 6500, id pull it to 6500 on every gear unless you have horrible traction issues at the upper rpms. If you have a lot of traction issues at the higher rpm id short shift the truck on the street and then make the tow/haul button run to a higher rpm for track use. Just my .02
If the cam stops making power at say 6200 then slowly drops power till say 6500, id pull it to 6500 on every gear unless you have horrible traction issues at the upper rpms. If you have a lot of traction issues at the higher rpm id short shift the truck on the street and then make the tow/haul button run to a higher rpm for track use. Just my .02
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