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.....a project in process. data is in complete
and constantly being updated.......
This is a table of the stock cams used that I have been able to find.
| Stock Cam specs. | Special
Note! (The manufactures listed here were found on the web, or listings from other various documents at hand. They are listed here for reference only and are not garaunteeed to be exact. Check with the manufacturer for final specs.) TT= Triumph Tune (Moss International) http://www.mossint.co.uk/ K = Kent Cams http://www.kentcams.com/ E = Elgin Cams http://www.elgincams.com/c-tri.html P = Piper Cams |
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Model |
Seat
Duration |
Intake timing |
Exhaust timing |
Camshaft
lift |
|
| Spitfire III | 240° | 22-62° | 62-22° | 0.215" | |
| Spitfire IV | ? | 18-58° | 58-18° | 0.240" | |
| Spitfire 1500 | 247° | 18-58° | 58-18° | 0.240" | |
and according to Elgin cams... |
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| profile name | seat duration |
.050" duration |
cam lift |
lash | application |
| E stock | 240° | 200° | 0.215" | I .008" E .010" |
stock low compression 1147cc MKI 110°lobe centers |
| E stock | 247° | 210° | 0.244" | I .010" E .012" |
stock 1500cc 112° lober centers |
| E stock | 247° | 205° | 0.242" | I .010" E .012" |
stock 1500cc 112° lober centers |
This is a few of the 'modified' profiles for cams usable in a
Triumph Spitfire that I've been able to find.
| Modified cam shaft specs | |||||||||
| profile name and source |
Intake timing |
Exhaust timing |
seat duration |
.050" duration |
camshaft lift |
power range (mfr' claim) |
Max BHP @ speed |
lash | application |
| TT Road 83 | 30-56° | 74-28° | 0.288" | 2.2-5.2krpm | 4.75krpm | ||||
| TT Fast Road 83 | 37-63° | 74-28° | 0.288" | 2.5-5.5krpm | 5.25krpm | ||||
| TT Sprint 83 | 34-74° | 74-34° | 0.275" | 2.7-5.7krpm | 5.75krpm | ||||
| TT Race 83 | 42-68° | 78-32° | 0.302" | 3.3-6.5krpm | 6.0krpm | ||||
| E 64510-12 | 258° | 209° | 0.252" | I .010-.12" E .012-14" |
1147 & 1296cc - lage
tappet no major mods. reqiured |
||||
| profile name and source |
Intake timing |
Exhaust timing |
seat duration |
.050" duration |
camshaft lift |
power range (mfr' claim) |
Max BHP @ speed |
lash | application |
| E 6610-15 | 265° | 217° | 0.262" | I .012-14" E .014-16" |
milling of the head for
low and mid range torque is recommended |
||||
| E 7010-9 | 280° | 228° | 0.263" | I .010" E .012" |
3/4 grind for 1500 - high
compression stiffer springs required - exhaust header recommended |
||||
| E 7010 | 280° | 228° | 0.280" | I .010" E .012" |
1500cc max possible on street high comp. sitiffer springs, exhaust header all required | ||||
| E 71508-18 | 286° | 245° | 0.305" | I .018-20" E .020-22" |
same as previous with more
extensive head porting required |
||||
| E 7508-12 | 308° | 250° | 0.323" | I .014" E .016" |
same as above | ||||
| E 7708-9 | 308° | 256° | 0.310" | I .010" E .012" |
same as above | ||||
| E M7708-13 | 308° | 255° | 0.321" | I .014" E .016" |
Road race grind - at least 12:1 comp required power above 5krpm | ||||
| E 7708-12 | 308° | 263° | 0.348" | I .016" E .018" |
full race power from 5500-7500 rpm | ||||
| E 7806-14 | 312° | 266° | 0.328" | I .016-18" E .018-20" |
all out race 13:1 compression ratio required | ||||
| profile name and source |
Intake timing |
Exhaust timing |
seat duration |
.050" duration |
camshaft lift |
power range (mfr' claim) |
Max BHP @ speed |
lash | application |
| K TH2 ?? | 39-76 | 76-39 | 295° | 0.381-.377" | 2500-6500 | Fast Road | |||
| K TH3 ?? | 34-70 | 70-34 | 284° | 0.412" | 2500-6800 | Road/Rally | |||
| K TH5 ?? | 37-63 | 73-27 | 280° | 0.412-.420" | 2200-7000 | Fast Road R | |||
| K TH6 ?? | 42-68 | 78-32 | 290° | 0.446-.4448" | 3000-7500 | Rally | |||
| K TH7 ?? | 47-73 | 83-37 | 300° | 0.469-.467" | 3750-8000 | Race | |||
| profile
name and source |
Intake timing |
Exhaust
timing |
seat duration |
.050"
duration |
camshaft lift |
power
range (mfr' claim) |
Max BHP @ speed |
lash | application |
| P TR4BP255-E | 19-57 | 57-19 | 256° | 0.379" | 1800-6000 | Mild Road | |||
| P TR4BP270-E | 26-58 | 62-22 | 264° | 0.403" | 2000-6500 | Fast Road | |||
| P TR4BP285-E | 33-65 | 67-31 | 278° | 0.472" | 2200-6800 | Road/Rally | |||
| P TR4BP300-E | 54-82 | 82-54 | 316° | 0.456" | 3500-7500 | Rally/Race | |||
TT= Triumph Tune (Moss International) http://www.mossint.co.uk/
K = Kent Cams http://www.kentcams.com/
E = Elgin Cams http://www.elgincams.com/c-tri.html
P = Piper Cams
©1987-2008
All material copyright© Teglerizer 1996-2008last edited 03/18/10
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