tbh i do agree with alot said here, like i do agree on injector swap to some injectirs with known correct data. you could even consider it an upgrade if you go with something like the bosch III's which are the 4 hole design and are said to have better attomization, and tbh if you sold yours on ebay i'm betting the swap wouldnt cost you much extra out of pocket... i also agree that the tune shouldnt and wouldnt take long like the 20min example given if car was in hand but you have to consider that the way were doing this atm is only averaging one lil change a day instead of log, change log change constantly over that 20mins(i do plan to give instructions and have Zed get a lil more hands on with changes to speed things up soon as we find suitable inj base numbers that seem close, i belive that the other zz4 bin we were working on was a reasonable close start but yes felt that fresh start was in order as i kinda lost track of where we were with that bin once he had a local tuner.
as for the map vs maf, i'm going to have to disagree with map being easier, its only easier to you guys because thats what you have most experiance with. the maf systems are so much more forgiving as they are able to self adapt much better then the map based systems. and the reason that map systems have more tables to adjust is because everything is and has to be a calculation unlike the maf which does the calculations direct from the actual air flow of the engine rather then having to calculate it all. with that said i do belive there are alot of great uses that truely do need the map based setups like boosted, or those times that the engine combo maxes out the maf based systems like in the case of alot of the 383 combos. now i could be all wrong here but this is just my opinion on the maf vs map and if you read around it also seems a shared opinion that tuning maf is easier then tuning map, but to each there own.
now back to Zed's situation and setup..yes that setup should just fire up and run decent from a stock bin, preferably a corvette style bin as thats what his combo most closely resembles in terms of CID, CR, Al. Heads, etc. and it does start and run on stock bin with nothing more then inj constant change but then runs way lean, on the other hand with the inj constant set at 26.5 it was running pretty close to the target 128blm at idle, so what does this tell us... does it tell us to pay closer attention to accel saying the injectors flow at 27.9 at 39.2 psi fuel, does it tell us that accel injectors are unconsistant and odd without proper specs sheet needed or does it just tell us we need to just treat these injectors as they need to be treated to make the engine happy and use whatever constant works best to get a decent base around 128blm then work tables from there.. yes known injectors would take one big step out of the puzzle but tbh i cant say i have even ever seen all the needed data avalible for even the newer bosch III style 4 hole injectors as popular as they seem... but i do know if there bought from a reputable rebuild service that these rebuild services not only match them but also can flow test and are able to give that data as well as volt ofset data as well.
ohh and also that msd box does kinda bother me a bit as i remember many telling horror problems with tuning engines that have them, i just cant remeber if its because of interferance, or hooked up wrong or what the issues were atm but i should look that up again soon as i get time.
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Originally Posted by xtreamvette69
lol. Will probably get that log done tomorrow night. Thanks.
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