• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)

TR6 1971 TR6 compression


Country flag
Results of a compression test 1/13/2001: 165,165,153,149,146,155.99,500 miles.
Results of a test today, 8/6/2012: 170,162,165,155,155,165. 103,000 miles.
First test was done with a push-in tester. 2012 test done with a screw-in tester. How do those numbers sound? Any issues? 4 of the plugs were sooty, 2 hsd gray center electrodes. Comments? Thanks for any input.

PD Plotnick
Stamford, CT


Jedi Knight
Country flag
The compression numbers pretty good, within 10% on the second test.

You could squirt some oil into each cylinder and retest to see if your rings are worn.

Which cylinders had which plugs? Could just be a slightly rich mixture.


Country flag
One lower compression cylinder(#4) had perfect mixture, one higher (#6) had perfect. Turning the mixture screws in or out doesn't seem to make much difference but it's definitely running a bit richer. You can push the choke in after 10 or 15 seconds and it will idle perfectly. Of course its warmer now. What it will do this winter in CT - who knows?
Similar threads
Thread starter Title Forum Replies Date
P For Sale 1971 TR6 for sale Triumph Classifieds 3
J For Sale 1971 tr6 Triumph Classifieds 0
B TR6 WTB: Side marker socket 1971 TR6 Triumph 2
O TR6 1971 TR6 Starter Help Triumph 1
O TR6 1971 TR6 Ignition Switch Swap Triumph 1
B TR6 1971 TR6 won't idle. Triumph 35
C 1971 Citroen DS-21 Other Cars 13
S For Sale Aston Martin DB6 Factory Parts Manual on CD/ROM – 1965 - 1971 Models. Other British Classifieds 0
S For Sale Aston Martin DB6 Factory Workshop Manual on CD/ROM – 1965 - 1971 Models. Other British Classifieds 0
N For Sale 1971 to 1980 Triumph Spitfire Bonnet Triumph Classifieds 0
GBRandy MGB 1971 MGB return to the road - need some help. MG 10
A TR6 Lettering on 1971 dashboard Triumph 1
T 1971 Series I XJ6 parked for 12 years - fuel pump problem Jaguar 4
S MGB First potential project: 1971 MGB MG 17
B TR6 1971 clutch and rear oil seal Triumph 2
J MGB Length of MGB oil stick for 1971 MG 1
NutmegCT 1971 Mercedes-Benz 250 Spotted 1
ShawnC_at_Moss MGA New - Plastic Fan for MGA & MGB to 1971 MG 10
zedvictor1 Spitfire 1971 MkIV Spitfire Triumph 3
LBCs_since_1988 1971 Norton Commando Awoken After 30+ Years! British Motorbikes 4
mikecyc72usa MGB 1971 MGB Steering column cowl MG 4
B MGB 1971 MGB Wing or Fender removal. MG 2
N MGB-GT 1971 MGB Rear Shock mounting bolt length MG 0
T Just curious - 1971 Jag XKE 6 cyl value Jaguar 13
G MGB 1971 MGB door mirror MG 8
C REALLY fast British race car [circa 1971] Racing 0
G MGB My 1971 MGB horn MG 3
W MGB-GT 1971 MGB GT Won't Start MG 11
G MGB 1971 MGB...The Project begins! MG 24
69mgbgt Spitfire 1971 Spitfire headlamp switch Triumph 14
69MGC MGB 1971 MGB Custom Rebuild MG 34
Cookie 1971 Austin Healey Sprite eek - crunching gears! Austin Healey 3
D Spitfire 1971 Spitfire rear axle - Help! Triumph 3
D Spitfire Spitfire seats [1971] Triumph 8
NASpecMGB WTB Midget/Sprite orig shift knob, 1971 or earlier Spridgets 2
S Raising the height ona 1971 B...... MG 2
G Spitfire 1971-80 Spitfire owner's might be interested. Triumph 1
AngliaGT 1971 Honda 600 - $100 Other Cars 10
T 1971 midget???? Spridgets 7
beaulieu 1971 Lotus . Vin numbers / model numbers ? Lotus 24
bcliff GT6 1971 GT6 on craigslist Triumph 20
S 1971 Seven Lotus 13
Morris Spitfire 1971 Spit for Sale in Texas Triumph 3
AngliaGT Spitfire 1971 Spitfire - $1500 Triumph 0
vping RWA Midget a 1971? Spridgets 23
S Stag 1971 Triumph Stag questions Triumph 8
AngliaGT 1971 -'74 Midgets Spridgets 5
Sherlock 1971 Ford Torino GT convertible Other Cars 20
Luke_E MGB About to start 1971 MGB Restoration.. Any Tips? MG 25
Howard_The_Duck 1971 4-Speed Up for Grabs MG 1

Similar threads