mleadbeater Posted February 5, 2015 Report Share Posted February 5, 2015 Could someone give me some typical acceleration times for my TR2, say 0 to 60, and 40 to 60 in top, for standard and maybe modified cars. The engine is modified with a fast road cam, TR4 head and carbs, electronic ignition ( normal advance/ret mechanism) so some times would provide me with a usefull perfomance benchmark. It has a Girling rear axle, not sure on the ratio, are there alternative ratios? I will use my satnav for speed measurement as the speedo may not be accurate. Thanks in advance Mike Quote Link to post Share on other sites
Motorsport Mickey Posted February 5, 2015 Report Share Posted February 5, 2015 You do know how you need to drive it to compare against the 0-60 mph times don't you ? Mick Richards Quote Link to post Share on other sites
Alec Pringle Posted February 5, 2015 Report Share Posted February 5, 2015 0-60mph road test time in original production form was in the order of 12.5-13 seconds. Without instruction in the appropriate techniques, no average driver is going to get below 14 seconds and will probably clock nearer 15 . . . . . . Road test figures represented taking the car to the absolute limit, brutal use of accelerator and clutch to maximise acceleration, smoking clutch and chipped gearbox.differential teeth no problem, and the transmission isn't going to last more than a few thousand miles afterwards . . . . . at best. It's drag racing for all practical purposes. Don't even think about taking out the stopwatch without first checking the wallet capacity . . . . or be satisfied with what you have. The nearest thing to a benchmark you'll achieve is that made by emptying the wallet on a TR specialist's bench. Cheers Alec Quote Link to post Share on other sites
vivdownunder Posted February 5, 2015 Report Share Posted February 5, 2015 From a 1962 Sunday Times TR2/3/3A owner's handbook - Road Test TR2. 0-60 mph 11.9 seconds (TR3A 12.4 seconds) 40-60 mph top gear 9.5 seconds (Top overdrive 12.8 seconds) Diffs were mostly 3.7:1 but 4.1:1 ratio could be ordered for fast getaways. Improved times would vary between cars. A new stock TR2 with overdrive covered the standing 1/4 mile in 18.1 seconds. My TR2 as a lad with standard bore but stage 2 head, fast road cam and extractor exhaust covered the 1/4 mile in a best time of 16.8 seconds. (As timed at former Fisherman's Bend circuit in Melbourne, later used for drag racing). Viv Quote Link to post Share on other sites
billp Posted February 7, 2015 Report Share Posted February 7, 2015 Having owned numerous examples in my experience a good standard TR2 will do 0-60 in about 12.5 to 13 seconds without any brutal treatment, and is absolutely no slower than a standard 3/3A 4/4A....it just uses less fuel ! Beware of halfshafts breaking on a Lockheed axle though.... Axle ratio makes a big difference...my current TR2 has a Girling 4.1 to 1 axle which really improves acceleration....fitted with a balanced but otherwise unmodified 4A engine, 1 3/4 in carbs, ram pipes, 4 branch manifold, no mechanical fan(which saves a couple of BHP) and on areoscreens it will cover 0-60 in under 9 secs, accurately timed with a passenger on board....top gear acceleration with this axle is amazingly good, but even in o/d it is a little undergeared for motorway work at 22mph per 1000 revs....i may put the 3.7 back in it...It does 30 mpg overall as well ...not as good as a std TR2 but still good having regard to the performance..... It stops too, on TR3 discs with Pete Cox XJ6 triple pot calipers which, he assured me, would bolt straight on, and they did ! And they are operated by the TR2 Lockheed twin m/cyl with no problems (and no servo !)Girling 10 in drums at the back, front Konis and a thickish a/r bar complete the set up....Bill Piggott Quote Link to post Share on other sites
mleadbeater Posted February 7, 2015 Author Report Share Posted February 7, 2015 Thanks ,guys, for replies, I certainly won't be brutal in a standing start test, which why maybe a 40-60 time would be safer. With the engine tuned as stated, and with a TR4 axle fitted, (ratio to be established), I just would like to know if the performance has improved much over the standard car, and if the tuning is effective. Will report my findings soon when weather a little more appealing. Cheers Mike Quote Link to post Share on other sites
billp Posted February 7, 2015 Report Share Posted February 7, 2015 Beware, a standard TR4 axle is 3 inches wider and may well cause rear tyre/wing contact poroblems, depending on tyre width and internal profile of wings...will also look a bit odd from the rear ! Bill P. Quote Link to post Share on other sites
Ashley James Posted February 8, 2015 Report Share Posted February 8, 2015 http://blog.modernmechanix.com/mi-tests-the-triumph-tr-2/3/#mmGal Quote Link to post Share on other sites
Alec Pringle Posted February 8, 2015 Report Share Posted February 8, 2015 Nice one Ash - and may I commend to everyone the road tests of the late great Tom McCahill, who as far as I'm concerned is up there with WB and DSJ. http://blog.modernmechanix.com/tag/mccahill/ As a teenager in the 60s I enjoyed a lengthy transatlantic correspondence with 'Uncle Tom', he really was the most extraordinary writer. One of those few guys one might rate as unique. Cheers Alec Quote Link to post Share on other sites
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