XU10J4R/RS dyno comparison

Hi all,

I forgot about this for a couple of years, but a mate and I stuck our 306's (a standard XT and a GTI6 with a cat-back) on the dyno at CAS a while back.

Thought I'd post them up for the sake of comparison. Both were on the same day on same dyno under same atmospheric conditions.

Gearing obviously throws the torque output out a bit but you can see the lovely flat curve that the GTi6 has.

Great Brenno,

Thanks for that. Even the standard 2L (J4R) engine has a flat torque curve doesn't it... You can certainly see the peak power at 5500rpm which drops off pretty rapidly after that.

Derek

It seems like the first was done in third gear, while the other in fourth?

Both torque curves are equally flat. The XT’s torque doesn’t look as flat, but this is because of the torque scaling on the right being of a wider scale than the torque scale on the gti6’s graph. i.e XT's each grid square is 120 N and the torque curve ranges between 3 squares. For the gti6, each grid square is 200N and torque curve ranges between 1.5-2 squares. For both graph’s the variance between the minimum and maximum torque is approximately 300-400N.

The gti6’s torque is quite flat for an engine of its capacity and power output. Certainly disproves what someone else said in another post about the gti6 only having the 6speed gearbox to mask its peaky torque curve. Though the 6speed does make it feel torquier than it already is.

the 50-70 mph in 6th acceleration time is good, which shows better low rev pulling torque than older 16 valve engines like the Mi16.