Why so many crazy variables on this car!? I'm tempted to set everything to zero and just run off of the fuel map alone and retune the map for it The only noticeably affective variable was the 'MAT compensation Counts vs MAT'
Why so many crazy variables on this car!? I'm tempted to set everything to zero and just run off of the fuel map alone and retune the map for it The only noticeably affective variable was the 'MAT compensation Counts vs MAT'
Here's todays bin.
I'm using the $8D-1227730-V1.xdf.php
for some reason I was not allowed to upload it here. it said it was an invalid file.
this isn't at all normal, there are no 'crazy variables'. 8D is supposed to be really easy to tune, with a VE table in the ballpark, it should be drivable in all conditions. i tuned an 8D car for a guy once and had no problems, in fact on the stock bin it ran alright, just sucked a lot of fuel.
i know it's frustrating but do you want to try starting from scratch?
i looked at your bin and i think your VE tables are probably awful. i also saw a few tables for fuel compensation vs temperature and map were zeroed out. i think those are best left alone.
with your trouble with injector offsets, show me the injector data you're trying to enter and lets figure out why it wont take it. it should accept anything from zero to 7782 usec. just focus on getting the ~9-14v values correct, if you're outside that range, you're limping home anyway. i wonder if you're trying to put msec values in there or something.
i'd like to clarify that statement and just say that after tuning speed density for a while, you get to look at a ve table and go 'that shit will never work'. and that's exactly what pops into my head when i see yours.i looked at your bin and i think your VE tables are probably awful.
was this developed from wideband data, trims, by feel, or what?
also how about a datalog and an adx? i want to troll it for sketchy sensor output.
if the forum wont accept a file simply zip the thing or rename it to .bin and tell us what the old extension was.
maybe this will give you some hope
i put a DGV weber carb on my beater mazda truck. it's pretty stock except for some crazy handmade exhaust.
it's a mechanical progressive carb, that means one barrel opens until half throttle, then the bigger barrel opens till wot, so a quiet and efficient cruising range with a massive (and fairly sudden) boost for heavy throttle.
with the jets that the mfr swore would run fine, it ran great on primary barrel, but when the secondaries open, it would bog and stop accelerating, at the same time it made a ton of noise like it wanted to smoke the tires.
they blamed the engine, so i checked everything.
distributor mech advance, vacuum, compression, ignition timing, cam timing, fuel pressure, exhaust restriction, new plug wires, the works, and it was all the same. i even re-gasketed the entire top end, since it was leaking a bit of coolant. all checked out.
i slapped the wideband on it, and it was at ~17:1 WOT.
jet kits are hard to come by for this thing, so i got fed up and grabbed a regular set of drill bits (can't find my numbered ones, maybe I sold them)
knocked the primary jet open with a 1/16th utility drill
i figure i probably made a #160 jet instead of the #140 that was in it.
runs perfect now. wideband avg 13:1 wot, 15:1 cruise.
i'll order a jet kit, but it's no rush.
moral of the story is, even with a computer, don't forget carb logic. sometimes, after you're 100% sure it's a fuel delivery problem, you just have to throw a good amount of fuel at the poor beast where it's hurting the most, then fine tune from there. a bit more gas never hurt anything, that's why you can pour fuel into an engine from a pint glass and it'll run.
Here's the bin from dyno day last January. It ran great on this tune for two weekends or so and then the car wouldn't run right on it anymore. It was too rich on the street.
And here's the stock chip copy from my car too for comparison.
I think I got'em
they were both .php before I zipped them
Here's the injector offsets that my tunerpro RT rejects every time. For Bosch type 3, 32lb
9V
0.954994
9.5V
0.827989
10V
0.725101
10.5V
0.646214
11V
0.573173
11.5V
0.500671
12V
0.435207
12.5V
0.386359
13V
0.339858
13.5V
0.292894
14V
0.24897
14.5V
0.212892
15V
0.176967
I know these are not the direct values to put into tunerpro because tunerpro goes something like 14.0v, 14.2, 14.4 etc. I found a fancy calculator somewhere to convert the values for me. I think I have them written down here somewhere.
Last edited by Turbo Nasty; 10-13-2017 at 08:16 AM.
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