[CA] hr-276-23-12-ig Cam
#1
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 6
Likes: 0
From: Southern California
Car: 1989 GTA Trans Am
Engine: 5.7 Tpi Soon to be LT1
Transmission: 700R4
Axle/Gears: ?
[CA] hr-276-23-12-ig Cam
I pulled apart an LT1 that was given to me and it had this cam in it. Never heard of it personally but after a search seams to be a great TBI cam to swap in.
The motor had a Vortech supercharger and tons of upgrades such as msd optispark and forged rotating assy. It is etched hr-276-23-12-ig. I'm taking offers and any info would be appreciated. Sorry I don't have picture but its in great shape and I might throw in the ls7 roller lifters with it.
The motor had a Vortech supercharger and tons of upgrades such as msd optispark and forged rotating assy. It is etched hr-276-23-12-ig. I'm taking offers and any info would be appreciated. Sorry I don't have picture but its in great shape and I might throw in the ls7 roller lifters with it.
#2
Junior Member
iTrader: (7)
Joined: Apr 2006
Posts: 28
Likes: 0
From: PA
Car: firebird
Engine: 355
Transmission: T-5 NWC
Axle/Gears: 4.11
Re: [CA] hr-276-23-12-ig Cam
Part Number: 109821 Grind Number: HR-276-2S-12 IG
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1987 Up CHEVROLET 8 Excellent low end and mid range torque and HP, good idle, daily usage, off road, performance and fuel efficiency, 2600- 3400 cruise RPM, marine applications: primarily used in 350 cu.in. mildly modified engines with high flow exhaust systems, for performa
Engine Size Configuration
305-350 C.I. V
Valve Setting: Intake - .000 Exhaust - .000 Hot/Cold - HOT
Lift: Intake @Cam 325 @Valve 488 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 339 @Valve 509
Rocker Arm Ratio 1.50
Cam Timing: TAPPET @ .004
Lift: Opens Closes ADV Duration
Intake 27 BTDC 69 ABDC 276 °
Exhaust 75 BBDC 29 ATDC 284 °
Spring Requirements:
Part Number 99846
Loads Closed 125 LBS @ 1.800 or 1 13/16
Open 334 LBS @ 1.320
Recommended RPM range with matching components
Minimum RPM 1600
Maximum RPM 5800
Valve Float 7100
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 0 BTDC 34 ABDC 107 214
Exhaust 48 BBDC (6) BTDC 117 222
Remarks:
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1987 Up CHEVROLET 8 Excellent low end and mid range torque and HP, good idle, daily usage, off road, performance and fuel efficiency, 2600- 3400 cruise RPM, marine applications: primarily used in 350 cu.in. mildly modified engines with high flow exhaust systems, for performa
Engine Size Configuration
305-350 C.I. V
Valve Setting: Intake - .000 Exhaust - .000 Hot/Cold - HOT
Lift: Intake @Cam 325 @Valve 488 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 339 @Valve 509
Rocker Arm Ratio 1.50
Cam Timing: TAPPET @ .004
Lift: Opens Closes ADV Duration
Intake 27 BTDC 69 ABDC 276 °
Exhaust 75 BBDC 29 ATDC 284 °
Spring Requirements:
Part Number 99846
Loads Closed 125 LBS @ 1.800 or 1 13/16
Open 334 LBS @ 1.320
Recommended RPM range with matching components
Minimum RPM 1600
Maximum RPM 5800
Valve Float 7100
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 0 BTDC 34 ABDC 107 214
Exhaust 48 BBDC (6) BTDC 117 222
Remarks:
#3
Re: [CA] hr-276-23-12-ig Cam
#5
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 6
Likes: 0
From: Southern California
Car: 1989 GTA Trans Am
Engine: 5.7 Tpi Soon to be LT1
Transmission: 700R4
Axle/Gears: ?
Re: [CA] hr-276-23-12-ig Cam
I am just asking for enough to ship it out and pay for my Dakota digital boxes so $200 will probably cover it.
Thread
Thread Starter
Forum
Replies
Last Post