1962 Jaguar E Type - Terry's Jaguar
Dyno results

With one possible exception, there is nothing subject to more exaggeration by gentlemen the world over than how much horsepower their engines produce. It is extremely easy to manipulate a dyno machine to produce whatever results you want to hear. Certain race engine builders approach the dyno shop in the same way the wicked witch of Snow White fame used to look in the mirror, i.e. "Mirror mirror, on the wall....".

Bill Terry (Terry's Jaguar - Benton, Illinois) prefers factual, real world dyno testing. Other than intake temperature and vapour pressure, he does not enter correction factors into the equation. Accordingly, of countless dyno tests he has conducted over the years, each shares the same common base line. He does this so that he can compare one engine to another and accurately gauge the benefit (or otherwise) of the various changes and tweaks he makes during the course of his engine building. In my opinion, Bill Terry is the foremost Jaguar race engine builder in the United States - period.

The following dyno sheet relates to a 4.2 Jaguar XK engine currently installed in what is almost certainly the fastest racing E Type in the US. As Bill says, "Some people may have more impressive dyno sheets, but for some reason they can't catch us on the front straight at Road America".

Bill Terry can be contacted in Illinois on (800) 447 4587 or visit the Terrys Jaguar webpage at terrysjag.com


RPM
Torque (ft/lbs)
Horsepower
3800
348.6
252.2
3900
344.1
255.5
4000
343.4
261.6
4100
348.7
272.2
4200
348.9
279.0
4300
347.6
284.6
4400
351.8
294.7
4500
353.5
302.9
4600
353.6
309.7
4700
351.0
314.1
4800
348.7
318.7
4900
350.2
326.7
5000
350.3
333.5
5100
353.4
343.1
5200
350.5
347.1
5300
347.2
350.4
5400
347.9
357.7
5500
347.2
363.5
5600
342.4
365.1
5700
343.7
373.0
5800
339.0
374.3
5900
337.2
378.8
6000
332.3
379.6
6100
329.5
382.7
6200
318.9
376.5
6300
313.2
375.6
6400
299.4
364.8
6500
296.4
366.8
6600
290.6
365.2

Return to main page