Thread: I have mis-matched parts where to start?

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this is what i have now...i have know low end power..where should i start cam and exhaust?

thanks in advance

383

chevy suburban
700r4 transmission
dart iron eagle 72cc 180
1.5 roller rockers
speed pro H860CP 40
edelbrock 750 vacuum
wieand action plus manifold
shorty headers with factory 1999 suburban exhaust
cam


Part Number: WG1064 Grind Number: 300-2H
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1957 1987 CHEVROLET 8
Engine Size Configuration
262-400 C.I. V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 3254 @Valve 488 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 340 @Valve 510
Rocker Arm Ratio 1.50

Cam Timing: TAPPET @---
Lift: Opens Closes ADV Duration
Intake --- --- 300 °
Exhaust --- --- 310 °

Spring Requirements: Triple Dual Outer Inner
Part Number ---
Loads Closed --- LBS @ --- or ---
Open --- LBS @ ---
Recommended RPM range with matching components
Minimum RPM 2500
Maximum RPM 6500
Valve Float ----

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 8.0 BTDC 46.0 ABDC 109 234 °
Exhaust 61.0 BBDC 3.0 ATDC 119 244 °

Remarks:

i was told i should start by changing my cam...this is what comp cams recomended

Cam Spec Card Inquiry
PART NO. 12-268-4
01 INTAKE MASTER 5443
02 EXHAUST MASTER 5203
03 ENGINE CS XE268H-14
04 GRIND NUMBER CS XE268H-14
INT EXH
05 HYDRAULIC Y/N YES 14 DUR @.050 224 230
INTAKE EXHAUST 15 LOBE LIFT .3180 .3200
06 VALVE ADJUSTMENT HYD HYD 16 ROCKER RATIO .00 .00
07 MAX GROSS VALVE LIFT .477 .480
08 DUR @ .006 TAPPET LIFT 268 280 17 LOBE SEPARATI 114.0
18 ADVANCE 4
09 VALVE TIMING OPEN CLOSE 19 VALVE SPRINGS 981-16
@ .006 10 INT 22 65
11 EXH 76 23 DATE SETUP / /
12 THESE SPECS ARE FOR CAM(S) INSTALLED
@ 110.0 INTAKE CENTERLINE

13 REMARKS

I'm blind.......Where did all those BIG blue words come from? From another forum somewhere else? Is the first combo running in the truck right now... More info please.

yes the 383 is running now with the combination above. no the blue letters are from here...i couldn't find the edit button to resize

Without knowing gear ratios, how much the truck is weighing. Still stock or lightened up, etc. What's your compression? So, still missing some vital info, I'm gonna tell you to run the comp cam. That particular grind has a nice pulling rpm starting lower in the band. Especially if you advance it 4 degrees.

Your lack of low end probably comes from A) Having a cam that doesn't start until 2500 RPM, and B) You're most likely running a stock converter, which will stall no where near 2500. You'd be better off to run that Comp cam. I'd bet that it will make a difference.

Along with changing the cam can I suggest tri-y headers,or 4-2-1 collectors,and then a balance pipe between your duals. They work well to give some bottom end torque,which you really need to get that heavy of a vehicle rolling. Hank

the compression should be around 9.6-1........the vehicle weighs around 3800lbs.....i do not know the gear ratio although im going 2800rpms at 65mph.......the stall is suppose to be 2500rpm (i did not do the stall no im am not 100% sure)