Franken7

i have some questions about tuning wolf3.1. s4 tII engine & turbo, 550cc inj x4, bov, aggressive streetport, 3" exhaust



i got the car with a raw base tune and unfortunately im clueless, i have never owned a turbo car before.. ive never really tuned any car at all before, that said im a quick learner and quite motivated. when i got the car it almost sounded like a p-port at idle and ran quite poorly untill u gave it a toenail of throttle then it jumped like a raped ape an got the turbo spinning, when i get on to boost i get misfires an mad popping out the exhaust. anything more then a toenail caused much the same popping and shuddering. idles at around 1300 and when coaxed just right runs quite smoothly thru part of the power band up to say 4000 ish. ive cleaned up driveability somewhat by calibrating the tps so itll read ~32 - 98, adjusted the acc enrich from MAP to tps (left load set to MAP) which has helped as well to a degree. previous owner told me he had the timing set at -5deg but im not sure if thats at the dizzy or the ecu, and im not sure how to check so question # one



Can i get an idiots crash course on timing and the wolf 3d, how to check it vs the pulley. it seems a stupid question as the answer seems obvious but id hate to blow my car up cuz i didnt ask. does keeping it at -5 offer me any safety against detonation while i figure out the fuel map?



second is regarding the fuel map. as i said it has a map that has the car semi drivable but little else. im afraid to get on it too hard cuz my wideband shows 14 to right off the scale at times and im not sure why. obviously i gotta tweak the fuel map but where to begin. so far my method is this



get on throttle.. watch wideband.. soon as i see afr 13 i hit the "nearest injection map point" and add 5 clicks (oh so scientific) to that point. id rather be rich then lean. is this seemingly logical method anywhere near effective or am i just playin with the fuse on my timebomb?



on decel the car is fine.. just cuts an drops to idle fine as well. as i mentioned above it accelerates nicely if i just gently squeeze the throttle however if i mash it i get all kinds of violence. my biggest issue is if i try to hold speed at any speed in any gear at any rpm i get an idly sort of lurch, i lose that sweet rotary hum and get almost an idle sound. get on the throttle a lil more an i get a bit of hesitation (has cleaned up a bit with some acc enrich tweaking) then wham i get the surge an the hum. any thoughts as to why i cant just maintain a constant speed?



ive got a heap more questions but ill start with that. i realise some of it seems like i havent read the manual (which i have studied for hours) or searched ( been all over various forums) but its really a case of i havent found a satisfactory answer to any of these things. id rather be careful and ask redundant questions then shell for a rebuild. as i said im brand new to tuning an turbos but im learnin. ive managed to make a near undrivable car streetable, but just barely and without getting anywhere near its potential. perhaps you good people can help me get the rest of the way. or at least to a point where im not afraid to stomp on the gas and boost the **** out of it.



last thing for now i guess is if anyone has a fuel map and more importantly an ignition mapfor a similar set up if u can send a screenshot of it so i can see the numbers an compare em. i have no means of viewing the maps in anything but the point by point increments on the handheld, i suppose ill have to sit down an scroll trhu it all an write it down at some point but itd be nice to see a proper working map to compare to.

drgoodwrench

[quote name='Franken7' date='Apr 6 2009, 01:32 AM' post='919927']

i have some questions about tuning wolf3.1. s4 tII engine & turbo, 550cc inj x4, bov, aggressive streetport, 3" exhaust



You need to number one-GO TO A DYNO SHOP>>> You will save yourself HOURS of pain and frustration, and not kill your motor!

Here is a link to the Wolf Software in use at a dyno shop....



http://www.youtube.com/watch?v=MbEbRqU-cak...re=channel_page

drgoodwrench

As to your first question. Static Timing- With the car idling, check your timing with a timing light and see what mark is lined up with the pointer. If you have never set the timing on a 13b, then get a Haynes manual on your car and read it before you do any more wrenching.



Once see the mark and determine your "static" at idle timing ( probably close to +8 or 12 degrees), then you need to look at the timing map in the software and see what cell is highlighted ( their is a "follow the active cell" toggle switch at the top of the software screen), and see what the value is in that cell.



If the values are the same ( i.e 8 degrees by scope, and 8 in the cell), then you are all set. If not, then you need to manually adjust your timing at the dizzy until they do match! If you don't know how to do this, then again get a Haynes manual..



Timing with the wolf...

http://www.youtube.com/watch?v=taztICkfjkM...feature=channel

drgoodwrench

Assuming your wide band is functional, to deal with the Fuel issues-

In the software, turn OFF the accelerator enrichement in the fuel modifiers section.

Also, sounds like you need to open your throttle a tad via the idle adjustment screw as you are starving the car at idle.



To "Butt Dyno" tune your car, you need to have a nice open area to have your buddy drive, while you play with the laptop and watch the wideband meter.

Safest to disable boost until you get a base map working as well, so remove your BOV or create a major pre TB leak of some sort.



Basically you need to hold CONSTANT LOAD on the car, so a nice long slow hill and a FAT friend are best



Assuming your base ignition and fuel maps are decent ( if not, I have one but this site won't allow me to upload it)), start on the fuel MAP screen, turn the "follow the active cell" toggle OFF, have your friend SLOWLY add a little throttle then HOLD it there. Watch which cell is highlighted, and note the wideband reading.

To adjust at this point, best to adjust entire load band, so double click on far left load value, and put in a new number for injector time (ms). If the reading is too high (lean) put in a bigger number!

Continue as above over and over at higher load values ( steeper hills/More friends in the car helps to reach them at slow speeds/low rpms) until you have a decent base NA map (if you have a 2 bar Map sensor, you'll only be able to get to 49% load= WOT in NA mode.)

Try turning on the enrichment now in fuel modifiers, and se if the car car drives decent in NO boost mode. If not, you'll need to play with the settings...a whole nother lesson...

For Boost baseline(fuel)- add 10% more injector time for every 10% increase in load over the 49% load settings, enable your turbo again, and do as above with your friends and a long *** hill with no Cops around!

Good luck