Himalayan EFI Dyno Readings

[Sherpa]

Have any of you gentlemen had your quoted Power and Torque readings tested on a Dyno..?

I am interested in readings for both EFI and Carb Models

My Owners Manual quotes the following

Model: 2020 EFI/ABS Euro IV

Max Power 24.5 bhp (18.02 KW) @ 6500 RPM
Max Torque 32 Nm @ 4000 rpm

If you have, could you please post up the following results for your bike

Test Rig...eg Dynojet.??

Model: ???

Any Tuning Modifications/maps etc

Max Power @ ???? RPM

Max Torque @ ???? RPM

My "Seat-O-Pants" Dyno tells me I am not getting anywhere near the figures quoted in the Owners Manual.

Perhaps these figures are obtained via a completely different methodology to the standard results from a "DYNOJET".

 

[Roy Gavin]

I read a review which claimed to have put the bike on the scales and a dyno and confirmed the factory figures for both. Claimed-------------!
Most dyno charts you will see are fiction, with a complete disconnect between torque and HP.
Dynos are more a tuning aid, if you do before and after runs they will indicate the change, but the actual HP is in the hands of the operator.
But the Hima is not a performance bike, so few will care - the power is more than adequate for its intended use.
Cheapest guaranteed way to liven it up is a tooth off the countershaft sprocket, and / or a couple more on the rear.
Single figure HP claims tell you little, the Vincent which held the World speed record for naked bikes for 60 years made 65/70 HP on a proper engine brake.
It lost the record , by 1 MPH, to a bike which made 100 hp more on a rear wheel dyno- torque is what counts!

 

[sam2019]

My "Seat-O-Pants" Dyno tells me I am not getting anywhere near the figures quoted in the Owners Manual.

If unhappy with torque you get maybe continue reading here:

The 462cc experience

For those who consider trying an engine upgrade I will write up my experiences with the 462 engine I am riding since a few days. The engine had done 30.000 km when it as upgraded so I chose to also overhaul the head with new vales etc., put in a new cam shaft and the timing chain assy. So...

www.royalenfieldowners.com

 

[pompadom]

The engine produces 24.5 bhp at the Crank and 21.0 bhp at the rear wheel. On youtube a chap i follow had fitted a BMC air filter, Red Rooster can. It sounded faster due to the noise but in truth, he had lost 2 bhp. On repacing the original parts that 2 bhp was regained. All a remap did was to smooth the running at higher rev's I.e more fuel when needed. No BHP gain, still 24.5 BHP at the Crank.

 

[Roy Gavin]

I read of some guy who got 24 1/2 hp at the rear wheel, but most operators of dyno's will tell you whatever they think you want to hear.
And things like a dry chain or different tires or tire pressures can make a noticeable difference.
Particularly at lower power levels.
Torque is the power to overcome a resistance, , hp is the work that power can do in a given time, so we should really be talking torque anyway.
And a single HP figure at max revs/ power tells you little about how a motor performs in the real world,
Area under the curve is slightly more relevant , and a 2 hp gain , between 3000 and 4000 revs would probably be more use use to most than 3 hp lost at 6500, if that were the case.
There is also the intrinsic lively throttle response , something which does not seem to register on a dyno but is much appreciated in everyday riding.
This topic has already been covered in great length on other forums, where people have made modifications which they feel on their butometer, and are usually rebutted by someone who quotes a singe max hp figure taken on a anonymous dyno as proof that the motor is no livelier in the mid range.
And there is no way most rear wheel dyno's measure power at the crank, they simply add on the standard 15% as an approximation.
Some folks have the equipment to measure the amount of power taken to drive a motor from the rear wheel with the plugs removed, and add that figure to their rear wheel figures to arrive at a crank figure, which might explain the difference in factory claims and measured outputs.
But given that actual bike weights are usually the same percentage out from claimed as the power is it might not!

 

[Sherpa]

My Euro IV 2020 EFI/ABS model has had a run on the dyno and shows a Max Power of 20.65HP @ 5980RPM

Add the 15% mentioned by Roy in the previous post would give theoretical Max Power of 23.75HP at the crank.

The power curve is not particularly smooth with lots of hills and hollows, indicative of poor mapping.

Power goes into freefall at 6500RPM....(where the ECU limiter cuts in I guess)

Max Torque is 21.26 @ 4310RPM... the torque band spread is reasonably smooth between 3000 to 4500 RPM but is still far from ideal.

Once again adding 15% the Max Torque would be around 24.45 at the crank

I have no doubt there could be Power/Torque gains achieved by fitting a Power Commander, but without having free access to a dyno it would be difficult to quantify. Could become a very expensive exercise to do a paid dyno run after every mapping alteration.

Having the revs limited to 6500 is not an issue for me as I only rarely ride on tar, or do long periods at highway speeds. I am not looking at achieving speeds in excess of 100-110Kph.

It is what it is.