GM cam
03-02-2001 | 11:19 PM
#1
Thread Starter
Supreme Member
Joined: Dec 2000
Posts: 1,536
Likes: 0
From: Springfield, MO, USA
Car: 1986 Trans Am, 1991 Firebird
Engine: 355 TPI, 3.1L V6
Transmission: 700R4 in both
GM cam
Anyone ever heard of a GM cam with the last 3 digits "151"???? I heard there's no cam quite like it so I'd like to find the specs on it and check it out!!
------------------
1986 Trans AM
305 TPI
200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Soon to upgrade to a 355 converted from TPI to Carb, Edelbrock 750CFM Carb, Edelbrock Performer RPM Intake, Hedman Shorty Headers, Stock casting pocket ported heads (2.02/1.60 - 65cc), XE268 Cam, Moroso HEI ignition kit with external MSD Blaster II Coil and an MSD 6-AL Box!!
Current project: Keeping my 305 running until I get my income tax returns!
------------------
1986 Trans AM
305 TPI
200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Soon to upgrade to a 355 converted from TPI to Carb, Edelbrock 750CFM Carb, Edelbrock Performer RPM Intake, Hedman Shorty Headers, Stock casting pocket ported heads (2.02/1.60 - 65cc), XE268 Cam, Moroso HEI ignition kit with external MSD Blaster II Coil and an MSD 6-AL Box!!
Current project: Keeping my 305 running until I get my income tax returns!
03-02-2001 | 11:31 PM
#2
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 15
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
It's terrible. It's something like 290° advertised, 222° at .050", .447 lift. I think everybody has built a motor with it at least once and been disappointed. It first appeared in Vettes in about 63; it was discontinued as a production cam after just a couple of years.
It doesn't have big low-end torque, but it never really "comes on" at high RPM either. Above all, it is the absolutely wrong combination of everything for fuel injection.
COMPETITION CAMS CAMSHAFT SPECIFICATION SHEET
PART # 12-106-3
GRIND NUMBER: REPLACEMENT FOR 3863151
ENGINE: CHEV SML BLK 265-400
INTAKE EXHAUST
VALVE ADJUSTMENT .000 .000
GROSS VALVE LIFT .447 .447
.001 TAPPET LIFT 342 342
VALVE TIMING OPEN CLOSE
AT .001 INT 61 BTDC 101 ABDC
EXH 109 BBDC 53 ATDC
THESE SPECS ARE FOR CAM INSTALLED
AT 110 INTAKE CENTER LINE
INTAKE EXHAUST
DURATION AT .050 222 222
LOBE LIFT .2980 .2980
LOBE SEPARATION 114
THIS CAM SHOULD USE SPRING # 981-16
Stay away from it!!! We've learned alot about cams in the last 40 years; that one never was any good, and it's completely obsolete now.
And those are its good points... you don't want me to quit beating around the bush and come right out and tell you what I really think about it.
------------------
"So many Mustangs, so little time..."
ICON Motorsports
It doesn't have big low-end torque, but it never really "comes on" at high RPM either. Above all, it is the absolutely wrong combination of everything for fuel injection.
COMPETITION CAMS CAMSHAFT SPECIFICATION SHEET
PART # 12-106-3
GRIND NUMBER: REPLACEMENT FOR 3863151
ENGINE: CHEV SML BLK 265-400
INTAKE EXHAUST
VALVE ADJUSTMENT .000 .000
GROSS VALVE LIFT .447 .447
.001 TAPPET LIFT 342 342
VALVE TIMING OPEN CLOSE
AT .001 INT 61 BTDC 101 ABDC
EXH 109 BBDC 53 ATDC
THESE SPECS ARE FOR CAM INSTALLED
AT 110 INTAKE CENTER LINE
INTAKE EXHAUST
DURATION AT .050 222 222
LOBE LIFT .2980 .2980
LOBE SEPARATION 114
THIS CAM SHOULD USE SPRING # 981-16
Stay away from it!!! We've learned alot about cams in the last 40 years; that one never was any good, and it's completely obsolete now.
And those are its good points... you don't want me to quit beating around the bush and come right out and tell you what I really think about it.
------------------
"So many Mustangs, so little time..."
ICON Motorsports
03-03-2001 | 10:18 AM
#3
Banned
Joined: Jan 2001
Posts: 1,429
Likes: 0
From: Belleville, IL USA
I've known people who have bought that cam just for the sound at idle.
They say it sounds really mean, but he's right about it not producing power.
[This message has been edited by The ODB (edited March 03, 2001).]
They say it sounds really mean, but he's right about it not producing power.
[This message has been edited by The ODB (edited March 03, 2001).]
03-03-2001 | 12:32 PM
#4
Thread Starter
Supreme Member
Joined: Dec 2000
Posts: 1,536
Likes: 0
From: Springfield, MO, USA
Car: 1986 Trans Am, 1991 Firebird
Engine: 355 TPI, 3.1L V6
Transmission: 700R4 in both
Well someone told me about this cam and said it was good.....but after reading the replies to this topic and other stuff online about this cam I'm just gonna stick with my Comp XE cam!! 
------------------
1986 Trans AM
305 TPI
200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Soon to upgrade to a 355 converted from TPI to Carb, Edelbrock 750CFM Carb, Edelbrock Performer RPM Intake, Hedman Shorty Headers, Stock casting pocket ported heads (2.02/1.60 - 65cc), XE268 Cam, Moroso HEI ignition kit with external MSD Blaster II Coil and an MSD 6-AL Box!!
Current project: Keeping my 305 running until I get my income tax returns!
------------------
1986 Trans AM
305 TPI
200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Soon to upgrade to a 355 converted from TPI to Carb, Edelbrock 750CFM Carb, Edelbrock Performer RPM Intake, Hedman Shorty Headers, Stock casting pocket ported heads (2.02/1.60 - 65cc), XE268 Cam, Moroso HEI ignition kit with external MSD Blaster II Coil and an MSD 6-AL Box!!
Current project: Keeping my 305 running until I get my income tax returns!
03-04-2001 | 01:36 AM
#5
Senior Member
Joined: Jan 2001
Posts: 527
Likes: 0
From: outerspace(maybe..pluto)?
GOOD PLAN!!! YOU DAMN WELL HOW THE PATHETIC a** CAM(AND I USE THAT TERM VERYYYYYY VERY LOSLY!!) DOES IN MY 356!! ITS A OLD CAM DESIGN THAT REALY SUCKS **** !! IT HAS NO BOTTOM END , NO MID RANGE...AND HELL NO TOP END EITHER!!!!!!!! THAT CAM BLOWS MY **** !!!! ABOUT THE IDLE IT DOESNT EVEN HAVE A LOPEY IDLE MORE LESS ROUGH!!! I CANT FIGURE OUT WHY PEOLPLE WAN IT FOR THE IDLE ??? AS TOLD YOU ONCE BEFORE GET THE COMP CAM THE "350HP CAM JUST SUCKS!!!" AND LIKE THE OTHER GUY SAID THATS BEING NICE!!!! 
SKEETER'S WAYYYYY WRONG THAT CAM BLOWS!!!!!! THE 300HP CAM IS EVEN WORSE!!! IT HAS LESS DURATION @.050 AND LESS LIFT OVER ALL......IT SUCKS TOOO!!!!! BOTH 327 CAMS ARE S*** JUST GET THE COMP WE TALKED ABOUT!!!!!!!!!!!!!!!!!!!!!!!
------------------
89 firebird formula
356 10.7:1compression
comp cams xe262 cam
performer rpm intake
#1405 edlebrock 600
434 casting completely redone with bronze guides and 202/160 valves 64cc chambers. decked .0005 thousandths
msd 6al
h.e.i. proform 50,000 volt vac. advance ditributor
700r-4 with 3.08 first gear and 3.23 posi 7 5/8 rear end.
b trans shift kit(will kill shifts...suck dong!!)
shorty heddman hedders with custom 3" pipe y-pipe back(no damn cat!) with 40 series flowmaster!
future mods: 406 roller REALLY REALLY REALLY RADICAL!!!!!
SKEETER'S WAYYYYY WRONG THAT CAM BLOWS!!!!!! THE 300HP CAM IS EVEN WORSE!!! IT HAS LESS DURATION @.050 AND LESS LIFT OVER ALL......IT SUCKS TOOO!!!!! BOTH 327 CAMS ARE S*** JUST GET THE COMP WE TALKED ABOUT!!!!!!!!!!!!!!!!!!!!!!! ------------------
89 firebird formula
356 10.7:1compression
comp cams xe262 cam
performer rpm intake
#1405 edlebrock 600
434 casting completely redone with bronze guides and 202/160 valves 64cc chambers. decked .0005 thousandths
msd 6al
h.e.i. proform 50,000 volt vac. advance ditributor
700r-4 with 3.08 first gear and 3.23 posi 7 5/8 rear end.
b trans shift kit(will kill shifts...suck dong!!)
shorty heddman hedders with custom 3" pipe y-pipe back(no damn cat!) with 40 series flowmaster!
future mods: 406 roller REALLY REALLY REALLY RADICAL!!!!!
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