roby1kenobi wroteSo the Corsa '93 has the P8 installed?
The FIM corsa 93 eprom can be installed on a P7?
Or, in case, is it possible to switch from the P7 to the P8 with the FIM corsa '93 installed keeping the Original red injectors?
(888 SP4 WIth P7, red injectors, open filter and complete Termignoni spaghetti.
You can run a P8 ECU on any of the bikes because the pin outs are all the same- but I think you would be better off looking for an FIM SP4 P7 chip then trying to make any duel injector P8 FIM chip work with your bike. Since the processors are different I doubt if a P8 chip will work in a P7 box--a Brad Black question. It has been over 10 years since I have worked on both maps and there was an obvious difference but I now have too many senior moments to even remember even elementary things.
I use the SP4 FIM chip on my SP2 and it works very nice-- I did not even have to push up the fuel pressure like a tuner friend suggested that I may want to do.
You will be taking on a bit of an R&D project if you really want to use a P8 box and chip for your duel injector SP4-- not that is not fun and many here on the forum have done it.
I would post this question directly to our resident pro tuner Brad Black-- he does this for a living!
If you want to use a P8 box then I would start out with at a different P8 duel injector base chip like a FIM 916 SP chip which you will still need to modify the maps. Since the FIM days are in the past making the mods to your maps will require using an after market buffer/modifier box and a data logger or a dyno. If you do a search you will find many discussions about fuel injection maps for our bikes.
There are a few reasons I believe that the FIM Corse chip would not be a plug and play with your bike---cams----valve sizes---injector flow rate--- map set points.
The Corse chip is made for either G cams or a combo of 431 and G cams which are sweeter at higher rpm's and the map's are set up accordingly ---the '93 Corse's have 31/36mm size valves and your SP4 has 29/33mm valves--- Corse's (or any P8 bike-or P7 single injector bikes from '90 up) used higher flow green injectors- and a Corse chips rpm set points and timing are biased to higher rpms and throttle positions while a street bike's set points are biased to lower end.
The 916 SP also has different cams and has 31/34 mm valves using green injectors. At a minimum you will have to switch to green injectors -----or crank up your fuel pressure which is easy to do with the original style PR- but this affects the entire map and probably will not get your map where it needs to be for the street.
Brad has also pointed out that the P7 and P8 boxes use theTPS starting set points differently- but it is easy to reset your TPS for a P8 box.
Hopefully Brad will post to this thread and you will receive a much more professional opinion.
