Calculate HP/Torque from ECU parameters
Calculate HP/Torque from ECU parameters
(OP)
Hello to all,
did a little search and found no threads wich could give me a
clue to my question.
I got a ECU parameter reader of a Lancia Delta Integrale, wich
is able to give a read out of the following parameters:
- Absolute manifold pressure in mmHG
- Air temperature in °C
- Injector pulse width in ms¨
- RPM/Min
- Water temperature in °C
- Stock injectors are 381 cc/min
- Fuel pressure is 3 Bar
- 1995 ccm
- 90 mm Stroke
- 84 mm Bore
- 4 cyl
Is there any possibility to approximate a hp figure out of these
parameters? Or wich parameter do i need additionally to get some
attendable power figures?
Thank you very much in advance
did a little search and found no threads wich could give me a
clue to my question.
I got a ECU parameter reader of a Lancia Delta Integrale, wich
is able to give a read out of the following parameters:
- Absolute manifold pressure in mmHG
- Air temperature in °C
- Injector pulse width in ms¨
- RPM/Min
- Water temperature in °C
- Stock injectors are 381 cc/min
- Fuel pressure is 3 Bar
- 1995 ccm
- 90 mm Stroke
- 84 mm Bore
- 4 cyl
Is there any possibility to approximate a hp figure out of these
parameters? Or wich parameter do i need additionally to get some
attendable power figures?
Thank you very much in advance





RE: Calculate HP/Torque from ECU parameters
----------------------------------------
The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Calculate HP/Torque from ECU parameters
Is the bsfc just an assumption (turbo engine) or do i need a lambda
factor to calculate it?
RE: Calculate HP/Torque from ECU parameters
RE: Calculate HP/Torque from ECU parameters
If it's not that accurate, even chassis dynos vary a fair bit from brand to brand and installation to installation.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Calculate HP/Torque from ECU parameters
modification has benefittet from a single modification, so
i guess this would be more precisely with such a calculation
as im able to make log files of each run.
I've already a g-tech accellerometer, it's a very precise tool
even compared with some rolling road dynos we've used even with
a good constancy of measuring.
How should the formula look like using the given parameters?
RE: Calculate HP/Torque from ECU parameters
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Calculate HP/Torque from ECU parameters
The smart phone app is still an excellent tool for evaluating changes if you always use the same section of road.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Calculate HP/Torque from ECU parameters
too much inconstancy troughout the runs and differences from 10-20%
compared to the RR and G-Tech measurements.
This is why i would like to give it a try with the log file calc
wich would give me the possibility to consider different correction
factors between the run.
RE: Calculate HP/Torque from ECU parameters
Maybe start there and see if you can figure out what is considered.
RE: Calculate HP/Torque from ECU parameters
mentioned i would like to use these paramenters, as im able to
read out in a log file the mentioned data, this would allow to
put these in a excel file to make a calculation, right now i
need help to make the equation out of these as im definately
better with the wrech as with math hihi
Here some pics of the build for those interessted:
htt
htt
RE: Calculate HP/Torque from ECU parameters
RE: Calculate HP/Torque from ECU parameters
RE: Calculate HP/Torque from ECU parameters
IF your engine runs closed loop at WOT then I suppose you could look at injector pulse width, that would tell you how much fuel you were using, and all other things being equal, would be proportional to power at a given rpm. That is one big IF, and a lot of assumptions.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Calculate HP/Torque from ECU parameters
I like your work very much!
Not exactly the answer you're looking for but could be accurate if inputs are accurate too.
http://
RE: Calculate HP/Torque from ECU parameters
already a few years ago developed a dyno, wich uses a torque sensor
on the drive shaft axles, it's enough accurate to have torque power
figures that are comparable to high end RR:
http:
@ Greg: The idea would be to have peripheric modifications, such as
IC, intake and exhaust system etc. and see also smaller changes in
the VE i.e. power output, if this would be possible accurate enough
based on these figures, a WB lambda probe can be installed on this
type of ECU we use so where able to monitor this.
@ Vagman2: Thanks for the compliments and thanks for the link could
be helpful