Thread: Anyone recognise this camshaft ?

Still on my voyage of discovery with my 86 EFI I picked up a year ago...

Measurements using a dial gauge on the hydraulic lifter
BTDC = before top dead centre
ATDC = after top dead centre
BBDC = before bottom dead centre
ABDC = after bottom dead centre


A) measurements using minimum (0.001") lift:
Inlet Opens 30 BTDC
Inlet Closed 84 ABDC
Lift: 6.65mm /0.262"
Duration: 294 deg
Peak angle 66 BBDC
Exhaust Opens 79 BBDC
Exhaust Closed 41 ATDC
Lift: 6.8mm /0.268"
Duration: 300 deg
Peak angle 65 ABDC

. measurements using 0.050" lift:
Inlet Open -3 BTDC
Inlet Close 38 ABDC
Duration: 215 deg
Exhaust Open 40 BBDC
Exhaust Close -8 ATDC
Duration: 212 deg


Here is the standard came specs from the '87-'88 manual:
IO 24 BTDC
IC 52 ABDC
I Peak 104 ATDC
EO 62 BBDC
EC 14 ATDC
E Peak 114 BTDC
Duration: 256



My mystery cam seems to have a longer duration and wider lobe separation than standard. I don't know enough to understand what that means - my guess is that the cam is designed for top end power ?




Here is a list of others from one of Phillip A's post's 3.9 cam lift (aulro.com) however I cannot find anything similar....

Make,Number,IO,IC,EO,EC,Dur,LSA,OL,Valve lift ,Ret(+) Adv(-),RPM Range,Class ,Comments ,
Crane,H-194,10,54,59,15,244/254,112,25,.400/.430,2.5,,Road ,Economy cam only. Not to be used with comp. ratio over 8.75:1 ,
Rover,ERR5250,14,70,64,20,267/264,115,34,0.416,3.0,,Production ,4.6-litre - Hi Torque Cam,
Crane,H-204,15,59,65,21,254/266,112,36,.430/.456,3.0,,Mild Road ,Improvement over standard cam. Can be straight swap. ,
JE,JE101,20,65,65,20,265/265,112,40,0.430,0.0,,Road ,,
Kent,H200,20,64,69,25,264/274,112,45,.435/.460,2.5,,Mild Road ,For pre-SD1. Also good for automatics. ,
Isky,621262,21,61,61,21,262/262,110,42,0.445,0.0,2000 - 5000,Mild Road ,,
TA Perf,TA212,21,64,69,31,265/280,110,52,0.473/.485,5.0,1900 - 4900,,,
Crane,H-216,21,65,71,27,266/278,112,48,.456/.480,3.0,,Road ,Excellent all rounder. Good power increase across rev. range. ,
Piper,HR270,22,62,64,28,264/272,109,50,421/.439,3.0,,Road ,Flexible with good mid and top end improvement. ,
Crower,50230,22,58,69,17,260/266,112,39,0.446/.451,-2.5,1500 - 4000,Mild Road ,,
V8Tuner,AS-H180,23,59,59,23,262/262,108,46,0.441,0.0,1000 - 4500,Mild Road ,Hi torque,
Isky,621270,26,64,64,26,270/270,109,52,0.470,0.0,2000 - 6000,Fast Road ,,
Piper,V8BP270i,26,66,66,26,272/272,110,56,0.420/0.420,0.0,1500 - 6000,Fast Road ,Hi Torque EFI +22hp,
Crower,50231,27,63,74,22,270/276,112,49,0.451/.477,-2.5,1800 - 4500,Mild Road ,,
Piper,V8BP270,28,64,64,28,272/272,108,56,0.420/0.420,0.0,1500 - 6000,Fast Road ,for Carbs +24hp,
Kent,H180,28,64,64,28,272/272,108,56,0.439,0.0,1000 - 4500,Mild Road ,Good for automatics ,
Rover,ERR3720,28,77,66,39,285/285,109,67,0.390,5.5,,Production ,4.0-litre,
Woody’s ,RV10/RV15,28,72,76,32,288/280,112,60,0.448/.461,2.0,,,,
Rover,ERR5924??,30,75,67,37,285/285,109,67,0.390,3.5,800 - 4000,Production ,3.9-litre - use with CAMSHAFT THRUST PLATE ERR5926,
Rover,ERC2003,30,75,68,37,285/285,109,67,.390/.385,3.5,,Production ,3.5-litre SD1 / TR8,
Crower,50232,30,66,76,24,276/280,112,54,0.488/.490,-3.0,1800 - 4500,Fast Road ,D&D's Ulitmate Road Cam,
Kent,H214,31,73,80,34,284/294,112,65,.469/.494,1.5,1500 - 5000,Fast Road ,Very flexible. Good road camshaft. ,
SD1Web,,31.5,60.5,78.5,23.5,272/282,111,55,0.55,-4.0,1000-4500,Torque,,
Rover,ETC8686,32,73,70,35,285/285,109,67,0.390,1.5,800 - 3600,Production ,3.9-litre 36D 38D,
Woody’s ,RV10/RV15-2,33,67,79,29,280/288,111,62,0.448/.461,-2.0,1500 - 5000,Fast Road ,,
SD1Web,,34,63,81,26,277/287,111,60,0.55,-4.0,1500-5000 ,Torque,,
Kent,H224,36,78,85,39,294/304,112,75,.494/.520,1.5,2000 - 5500,Road Rally ,Slight loss of flexibility.,
SD1Web,,37,64,80,31,281/291,109,68,0.55,-3.0,1500-5000 ,T&P,,
Kent,H234,38,80,87,41,298/308,112,79,.520 /.542,1.5,,Rally ,Poor low end but improves mid and top end power. ,
SD1Web,,40,70,80,40,290/300,108,80,0.55,0.0,2000-5500 ,Power,,
SD1Web,,40,66,83,33,286/296,109,73,0.55,-3.5,2000-5500 ,P&T,,
Piper,V8BP285,41,75,75,41,276/276,107,82,0.420/0.420,0.0,1500 - 6000,Fast Road ,Ultimate road cam. +30hp,
JE,JE102,43,79,79,43,302/302,108,86,0.500,0.0,3000 - 6500,Rally ,Good high end power. Peak torque 5000 rpm ,
SD1Web,,43.25,76.75,81.75,43.25,300/305,108,86.5,0.55,0.0,2500-6000,Power,,
Piper,HR285,44,72,72,44,296/296,104,88,0.439,0.0,2000 - 6500,Fast Road ,Ultimate road cam. Tractable but slightly lumpy tickover. ,
Kent,GPA,44,76,76,44,300/300,106,88,0.390,0.0,,Rally ,"Same valve lift as standard engine (.390"") ",
Oselli,RV8500,46,82,82,46,308/308,108,92,0.542,0.0,4000 - 7000,Race ,Ultimate hyd. camshaft.,

Maybe a John E. Davis Motorworks cam? They built the engine in my ‘86 RRC, bored, stroked, aftermarket EFI system, etc. John’s brother, Bruce, split and formed Davis Performance Landys. They built the engine in my P38A (full balance, HC pistons, new cam, etc.).

The new cam is the interesting bit, they took an RRC cam and reworked it for the P38A.

You could try Bruce for info. They no longer do the machining work they used to do since they moved from Amaroo to South Windsor but he may still have the info.