BC stage 3 cams tuning

[army240]

Hello fellow Zilvians!

I've got a fully built sr20 engine with stage 3 cams from Brian Crower(272/272). I'd like to have some advice on how to tune them, overlap and everything.

For now I'm at 2 degree BTDC on the Intake and 6 ATDC on the exhaust. But when I turn my engine by hands, I can hear some of the compression going in the exhaust(which in fact is very low(120 PSI on all 4, not even 1 psi difference on each)) :duh: I drove the car for about 500 miles since I've built it.

http://img41.imageshack.us/img41/5686/camekm.jpg

Here's the tag that came with the cams. And oh yeah, i've got the valve springs!

So if anybody has got any experience with those cams, it would be appreciated if they can share with me!

Thanks a lot for your help

Frank

[waynehead05]

[off topic] Can you post your full setup as far as motor and drive train? How high are you looking to rev this thing?[/off topic]

[army240]

Engine
Sr20det Blacktop
Garrett Gt35R .63 Ar Dual Ball Bearing Turbo
Tial 44mm Wastegate
CP Piston 86.5mm 8.5:1 (Overbore 0.5mm)
Eagle H-Beams Connecting Rods
ARP Head Studs Kit
ARP Main Studs
Brian Crower Camshafts Stage 3 Spec 272/272
Brian Crower BC Valve Springs / Retainer Kit
Hks Ajustable Cam gears
Hks Fuel pressure regulator
Hks Fuel Pressure Gauge
Hks Hi-Power 3.5" exhaust
Circuit Sport SS Turbo Lines
SR20DET Main/Rods/Thrust Bearings
Sard 850cc Injector + Spacer
Walbro 255 Lph fuel pump
Custum SS Fuel Line
Timing Chain kit + guides
Oil Pump Assembly
Cometic Metal Head Gasket
Water Pump
Full Engine Gasket Kits
Nismo Thermostat
Nismo Motor & Tranny Mounts kit
Greddy Intake Manifold Plennum
Greddy Type R Blow Off Valve
Greddy Cooling Plate
Greddy Oil Pan
Greddy Rocker Arms Stopper
Greddy Oil filter relocation kits
Full-Race top mount turbo manifold coated 1300deg
Full-Race 3” Upper Top mount Adaptor Downpipe
Blitz 3" Downpipe
Blitz LM Front Mount Intercooler
Blitz Lm Intercooler piping kit
Blitz Radiator cap 1.3kg/cm
Blitz Radiator Hose
Samco Radiator Hose
Sard Torque Control Valve
SplitFire Coil Pack
Koyo 3" Aluminium Radiator
B&M Short Shifter
Cusco Oil Can can
Spec Stage 3 clutch kit
AEM Filter kit
DriveshaftShop One piece Alluminium Drive shaft
Dual Electric Fan + Full Race Custom Plate

Footwork / Handling
Cusco Zero 2 Coilover kit + Camber plate
Kaaz 2 way Lsd
Energy Suspension Bushing Polyurethane Kit
Tc Sportline Strut Bar Front/Rear
Ichiba 5 Lug Hub conversion
Z32/Skyline Brakes
-Front: 30mm Aluminium Calliper 4 pistons
-Rear: 18mm Aluminium Calliper 2 pistons
Brembo Rotor 11” Drilled+ Projet Mu B-force ceramic Pads
Russel SS Brake Line
Work Emotion Cr Kai Wheels
Front: 17 x 9 +17 With Yokohama Avs Sport 235-40-17
Rear: 18 x 9.5 +12 With Yokohama Avs Es-100 245-40-18
Greddy tuners Lock Nuts
Muteki tuners Lock Nuts

Interior/Exterior
D1 B-magic Body Kit
Origin Lab Carbon Hood
180sx Kouki front Bumper Light
Cristal projector Headlight
D-Max Cristal Tail light
Black Leather Rear Seat
Bride Brix II Seats
Bride Type MO seat brakets
Nardi Torino Steering wheel
Works Bell S13 Hub
NRG innovation Quick Release Hub Gen 1.5
Momo Pedal set
Momo Shift knob
Megan Racing Pillar Gauge Pod
Custom Alluminium Center gauge pod
Custom Switch Panel

Electronic
180sx Jdm Cluster
Apex’i Power Fc D-Jetro + sensor kit
Apex’i Turbo timer
AEM Uego Wideband
AEM Tru-Boost Electronic Controller kits
AEM Alcool/Water Injection Kit
Defi BF Amber Oil temp Gauge
Defi BF Amber Water temp Gauge
Defi BF Amber Oil pressure Gauge
Defi Multi Link Controller
Optima Red top battery
Alpine Type R 10” Subwoofer
4 x Power Series Jbl speaker
Jbl Bpx 500.1 Ampli
Pioneer premier DEH-P490IB Head unit
2way Security System

[defiantmofo]

i have a similar valve train with 272/272 and my compression test was around 115-120. Leakdown was less than 3% on all cylinders. On another topic, someone mention high lift/high duration cams could lead to showing lower compression.

[xX5Tb0nE7Xx]

I just bought those same cams for my sr20 but I have a stock bottom end. I was also wondering about tuning am I going to need NIStune or something similar or can I get my stock #63 ecu tuned? Sorry if its a stupid question Im kinda new to the whole tuning thing.