Tom Wilson
December 20, 2006

Unusually peaky data came off Kenne Bell's Dynojet during this test, and our 100-rpm resolution doesn't show the absolute peak figures, but you get the idea. So, if peak numbers in the text don't align exactly with the figures in these charts, you can still believe the text numbers.

Furthermore, these are just the two highlights of hundreds of tests on this car. Kenne Bell has all of its tests on file if you're seriously running one of their blowers and want tuning assistance. To show the highlights of the Two-Valve development, see the accompanying "Two-Valve Dyno Summary."

 Naturally Aspirated Kenne Bell, 20 psi Difference 
RPMPOWERTORQUEPOWERTORQUEPOWERTORQUE
2,500110232n/an/an/an/a
2,600115231n/an/an/an/a
2,700119231n/an/an/an/a
2,800124233254477130244
2,900131237322583191346
3,000138241342599204358
3,100144243359608215365
3,200149244378621229377
3,300153244387616234372
3,400158243395610237367
3,500163244406609243365
3,600168245424618256373
3,700173246444630271384
3,800178246465643287397
3,900184248483651299403
4,000189248497653308405
4,100192246506648314402
4,200195244514643319399
4,300199243525642326399
4,400203242538643335401
4,500206241547638341397
4,600209239562642353403
4,700212236573641361405
4,800214234583638369404
4,900217232596639379407
5,000218229603634385405
5,100215221610628395407
5,200213215618624405409
5,300211209622616411407
5,400210204626609416405
5,500209200631603422403
5,600208196636596428400
5,700207191641591434400
5,800206186643582437396
5,900202180644573442393
6,000197172644563447391
6,100182157649559467402
6,200n/an/a643545n/an/a
6,300n/an/a606505n/an/a

This chart highlights the Two-Valve Mustang GT development story. Some of the manual transmission power figures are calculated from the automatic numbers. All figures are supplied by Kenne Bell, and each test uses all the hardware, such as throttle bodies and mass air, as previous tests, plus changes as noted.

AutoManualDescription
217245Stock '99-'04 GT
N/A431KB 1.7 blower, 9 lbs, 90mm mass air, 75mm TB,
  Cool Air Intake
476507KB 1.7 blower, 15 lbs boost. Inefficient blower,
   undersized throttle body.
530564KB 2.2 blower, 15 lbs boost, 5-in Cool Air Kit
508541As above, w/8:1 compression, 15 lbs boost
579616Camshafts, ported PI heads, headers, X-shape
  exhaust crossover, and 15 lbs boost
64268220 lbs boost, electric water pump, underdrive
  alternator pulley