Leyland Car Owners - Dyno Test of 4.4 with Rover Heads

Date: Thu, 29 Jun 2006

: I have (only) just completed a series of Engine Dyno tests on a reco P76 V8 destined for a 1989 Range Rover

: The P76 engine was supplied by me and was built and tested by Fred James at “Dyno Kinetics” in Dandenong ( Melb 9791 2454 )

: This motor has standard bore and pistons but has a (very) mild cam and uses the Rover heads , distributer , extractors and fuel injection system

: As we couldn’t be bothered to remove / rewire the Rover computer to the Dyno , we used a after market “Autronic SM4” to control the fuel injection

: In a Range Rover , you need to use the Rover heads as the accessories do not bolt to the P76 heads .

: The slightly larger chambers on the Rover heads give an actual compression ratio of 8.4 to 1 and we used 24 degress total advance on the engine

: Fred was not attempting to build a “performance” motor as the final customer wanted a basically standard engine

: Much could be done to increase the output of this engine but it was interesting to run some tests on a basically stock engine with Rover injection.



: Comparisons
: 150 hp = Rover 3.5 : carbs
: 160 hp = Rover 3.5 : hi comp with carbs
: 180 hp = Rover 3.9 : Injected
: 190 hp = Rover 4.0 : injected
: 225 hp = Rover 4.6 : injected
: 224 hp = Leyland 4.4 V8 with Rover injection etc

: Not bad for a 30+ year old block design

: Most impressive was the reasonably flat power curve and average hp of 173.9 and torque of 280 ftp

: We ran the engine in on the dyno and then really let loose on it , with one “run” having the exhausts glowing red hot

: I captured the dyno runs on video and I am compiling it into a 10 min clip (80% done) . We turned the lights off on the run with the red hot exhausts and it looks great on the video

: I have sent a separate post with some photos and I will let you know when the video clip is available

: Enjoy

: Rick

Leyland P76 Owners 2006

Engine Dyno test

[leylandp76] Dyno test - Reconditioned Engine

Comparisons