Topic: ITB Wisdom
a friend and I are planning and ITB/velocity stack install on the 1987 Honda Prelude, so I am inquiring if anyone has some wisdom to impart, suggestions, advice, share mistakes made, etc. (there are no kits, adapters, nothing available to make this easier...)
So far, we have throttle bodies off a Honda motorcycle, 2005 CBR 1000RR, and it has a throttle position sensor on it
We are planning some kind of adapter to attach it to the head
---fuel injector suggestions? it seems to be very difficult to find the flow rates to these. Searching, we think they are around 290 cc/min. The stock infectors on the Prelude are 235 cc/min. We are thinking of just trying the high flow injectors, then playing with the fuel pressure. I purchased an ebay adjustable fuel pressure regulator that can hook up downstream of the fuel rail. I think there was a Honda CBR 600 motorcycle maybe with smaller flowing infectors that might fit...
--plan is to buy little individual air filters to attach to each throttle body
-- I need to find out if I should use the MAP sensor that came with the throttle bodies or the stock Prelude MAP sensor
---I wonder if I will need to get an new ECU....currently it has the stock "OBD-0"....very old, stock one
---I still need to figure out how to run the throttle cable, maybe once I mount it, I will be able to figure it out. I read somewhere that it is important to check the throttle cable travel, so that mashing on the gas pedal does not pull on the throttle too much,....might need to install somekind of hokey puck under the gas pedal??
---I am installing and Air/Fuel gauge right now, so maybe that will help
---also, unfortunately, timing can't really be adjusted on this car....there is nothing in the little tranny window to shine a timing light at (maybe it was removed when we had the flywheel machined down to make it lighter?)...I think we are running a bit on the rich side, since spark plugs tend to gunk up a little over time, but like after 5 or 6 races, nothing drastic....and the distributor will not turn any further to make it leaner....it is retarded all the way..?I think...advancing the timing makes the car run richer, correct?
- I am probably not foreseeing some problems that are in store for me....
Loudon, NH 2014 - Millville, NJ, Lightening 2019 (RIP)
New and improved: 1987 Honda Prelude Si (Opus #11) Pittsburgh, PA 2021 - ??
and finally won something, Class C Win: Loudon, NH 2022