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itb
Posted: Thu Jul 12, 2007 11:43 pm
by lporter
Can some one explain the ITB base map please.
I am hav difficulty setting the idle of my jenvey throttle bodies.
I have a CRX uk spec with a B16A1 engine with S300 P28 ECU
The car is running E85 fuel (15% petrol/gasoline 85% ethanol)
My questions are.
1. Why the Map goes 1% to 40% on TPS based tables not 0-100%
2. Why the TPS ranging is set to 1%-99%
3. What Idle speed is set for a ITB set-up
4. How the butterfly idle stop screw is adjusted this may be covered in question 3 however.
Any guidance will be grateful recieved.
Posted: Fri Jul 13, 2007 8:27 am
by Hondata
With the calibration the tables used for the ITBs have been expanded for more resolution. From Options select 'Show Boost Tables'.
I'm not sure about #3 & #4 - you can either disable the idle valve and use the throttle stop, or adapt the idle valve to bypass the throttle plates using some vacuum line and an acculuator.
ITB 1%
Posted: Fri Jul 13, 2007 11:34 am
by lporter
Ok thanks for the info. My only question is.
Why does it start at 1% and not 0% ?
Posted: Fri Jul 13, 2007 3:45 pm
by Hondata
We prefer to start table indexes with a mersenne prime number.
ECU for jenvey?
Posted: Wed Jan 02, 2008 3:54 pm
by lporter
I currentley have a B16A1 engine with a S300, P28 ECU with jenvey throttle boddies.
Do you recommend changing to a P30 ECU or another model ECU for use with jenvey throttle boddies due to the lack of a barometric pressure sensor?
If so can I just order an ECU from a hondata dealer and swap the S300 board straight over?
Posted: Wed Jan 02, 2008 5:51 pm
by marklamond
I'm also doing a Jenvey setup at the moment with the S300, B16A1 (for now) do you have any pics etc?
http://www.marklamond.co.uk/misc/itb/jenvey5.jpg
http://www.marklamond.co.uk/misc/itb/jenvey6.jpg
As UK OBD-1 ECU's do not come with baro pressure sensors i sourced a P28 from the US and swapped it over.
I stole parts from a number of ECU's to create one that did everything. If you don't have anyone nearby that is confident doing this would get a USDM P28.
The US ECUs tend to have more features than any other market, depending on the vehicle.
I'm running idle control with a stock IACV, but from your fuel type suggests it is not a street car - you could save youself a lot of time running a fixed idle.
Are you in the UK?
ITB
Posted: Sat Jan 26, 2008 6:43 am
by lporter
Yes I live in wales.
I Emailed you but got no reply did you get my email?
