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Discussion Starter · #21 ·
I don't know.
it is sold as a reinforced gradening hose (it was the only one of the right size that was in my garage at the time).
I may change to a proper vacuum hose, but given the amount of kPa/Bar I can see on the engine, I am pretty confident.
Hoiwever, I don't know for the temperature under the bonnet regarding this hose.

For the PVC, I have seen people connecting OCT with regular hoses and not having any issues so far, we will see...
 

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Discussion Starter · #22 · (Edited)
I started the car this afternoon for the first time.
It is running on the base map.
It is really rough, but the car moves on its own power.

I tried to switch to TPS instead of MAP and changed the resolution of the VE table.
=> Do I need to change the other resolution accordingly ? (spark & AFR)
 

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Discussion Starter · #23 ·
Final touch on the setup, I found an airbox from a Triumph TT 600 which is the motorbike model the ITB comes from, and extracted the intake trumpet.
Wood Gas Machine Auto part Metal


Automotive tire Wood Tire Automotive wheel system Gas


Then fitted on the engine with a custom grill on it.
Automotive tire Rim Tread Synthetic rubber Automotive lighting


Vehicle Motor vehicle Coil Electrical wiring Auto part


It looks nicer and maybe will improve the airflow.
 

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Discussion Starter · #25 · (Edited)
I saw this on a muscule car forum and it is made of a window aluminum net to prevent mosquito, that I cut to size.
fortunately, the trumpet came with their round spring clamp, that I have been able to re-use around the grill
 

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Discussion Starter · #26 ·
While starting again with my VE table with ITB, I found on several forums that when switching to TPS the table resolution needs to be modified to increase the accuracy on the low an partial throttle input.
However, I found that when I apply light throttle, the sensor read 10% then 20% and increase by approximately 10% step.

-> Do you guys with ITB have a stock resolution (10% step) or a modified resolution with more accuracy on the lower values (1, 4, 7, 10, ...) ?
 

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Discussion Starter · #27 ·
While looking at data, I found that the Trimuph TPS is working from 3.0 to 22.0 mV where the BMW TPS I had on the previous setup was working from 66.0 to 184.0 mV.
This means the range on the Triumph TPS is 19 mV (22-3) and on the BMW TPS is 118 mV (184-66).
Does the BMW TPS is 6x more accurate ?
Maybe the Speeduino can't read 1% step because of this small range of the Triumph TPS.
 

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Discussion Starter · #30 ·
I took the car out this weekend to check the TPS values and I can't really reach small values.
while driving in the countryside with low throttle input, the reading was almost never below 30% and most of the time around 50%

When I stopped, I tried to be very careful with the throttle and press the pedal linear from 0 to full throttle and the reading where like this.
Rectangle Slope Computer Font Screenshot


As you can see, it "jumps" by 6% steps, and I have been very careful with my throttle input.

As a result, the cells I can reach while driving are mostly in the top-center region when I cruise on the road.


I will try to match the BMW TPS to the Triumph ITBs to see if it makes any difference in TPS readings.
 
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