sphere478

first off hi guys! long time lurker first time posting i noticed you guys do allot of work here with ebl flash so i thought id drop in for a little help

ive got it all together and running from pan to cold air intake cerpentine belt to rear end quick specs are

54mm bbc tbi with all the mods including vrfpr, pod spacer,adjustable regulator tpi pump 90lb injectors @ 28 psi 2bbl victor jr intake 64 cc 215cc aluminum heads 2.05/1.6 600 lift 1.6 rockers headers lunati retrofit roller 60113 full roller timing set 10.7 cr 406 ci bottom end all factory accesories and ebl flash

http://www.v8s10.org/forum/viewtopic.php?f=28&t=34673 more info on specs can be found here



anyway im pretty sure i got everything nailed except the tune i think the fuel flow is on the mark and am not having any trouble getting it to run rich when i tell it too and it will idle fine with no injector shutdown or abnormal spray so im convinced my problems are software

>heres what im chasing down at the moment

it has bad throttle response in drive as in i cant peel out it kills the engine but i can rev it to the sky fine in neutral (on some different bins it will peel out) but the one i settled on that works the best has this problem

any idea where i should start?

or even better if someone has the time id really appriceate it if someone could throw together a custom starting bin for my setup


heres the bin im working with
remove .txt extension

Raynmaker

I can't offer much help other than to suggest the compare bin feature the ebl has. Use it to look at low rpm high map differences between your bin and the others that allow the peel out. You might see a pattern that will give you ideas on where to start. Areas I would look at would be basic spark advance and AE and PE combos and any table that adds when low rpm and high map.

RBob

iTrader: (1)

Note that there is a bad value in the "BPC - BPC vs VAC" table at 45 Kpa, should be 83.

For the no-peel-out, too much AE. With the new BPC at 73, and a standard BPC of 135, fudge it a little and use 82 for the new BPC in this equation:

82 / 135 = 0.61

We use 82 so we (hopefully) aren't reducing the AE too much. Now multiply all entries in these two tables by 0.61:

AE - MAP PW
AE - TPS PW

Flash that in and try it out.

If you are running closed loop likely need to do the same with one of the proportional gains tables.

Also, with the engine being built up you should get rid of the dip in the high speed VE table at 4K RPM. GM has that there to reduce power to get the driver to up shift. Just bring it up and blend it in to the lower & higher RPM areas.

RBob.

sphere478

yeah i caught that today.

i restarted yet again with another bin today i tried the 3000 bin un modified it runs rough but it will peel out but is unusable without modification.

after i load some known setings into it like fan, shift light, bpc inj flow etc.. and after a little bit of misc tweeking (to things a few things i dont recall atm) i got it idling at about 8-900 rpm pretty smooth but the peel out problem is back again.. also there are issues with the spark advance can you recomend a table? the ve table is deff off but its the best one ive found yet

proportional gains tables?

prp gain multiplier vs airflow?
prp gain vs o2 error?

here is the one i ended up with after a few hours of tinkering one sec ill try to make the changes you recomended on it

ps its a vac referenced regulator does that make a diff?

sphere478

hows this look?

sphere478

it was earlier in the day so its not fresh in my mind but that does seem to have helped it is drivable now but still boggs down i was able to do at least one peel out
so best bin yet..!

yeah, i gotta get something figured out with the spark timing its chirping at me from under the hood im running 87 octane atm i can move to premium if nessary but would prefer to try to tune for 87. specs: compression is 10.7 aluminum kidney shape 64cc chambers 4.155 bore 3.75 stroke suggestions?

unless its chirping cause its leaning out? is this the case?

sphere478

is this what you meant byt the 4000k dip?

RBob

iTrader: (1)

At a minimum need to set up the "BPC - BPC vs VAC" table. Use the EBL Utility then copy & paste into the BIN.

RBob.

sphere478

already did that? 406ci 90lb vac referenced at 28 psi in tuner pro it shows the values are matching whats in the ebl utility

sphere478

in tuner pro it shows it copied it correctly ? is there something im missing is it not in the bin i uploaded? should i use specs that are different than my actual engine specs when calculating is that what your saying?

RBob

iTrader: (1)

Then you are good to go in that area. Although you should use 80.5#hr for the injector flow rate, as that is what they flow at 13 psi.

Before testing & tuning let the engine warm up to operating temperature.

In your log2, every time you whack the throttle the engine is going dead lean. Check the fuel pressure while doing this. You may find that it is dropping off.

RBob.

sphere478

Really? The 90 lb bbc injectors flow 80 at 13? So if they are rated at 90 what pressure where they rated at?



Ok so here is what my fuel pressure is doing first rev is neutral second is in drive

Looks like the vac reference is working no dips really..

Think i need to correct the lean condition in the tune?

RBob

iTrader: (1)

Link is broken, might be due to it being a secure connection (https).

RBob.

dimented24x7

iTrader: (2)

The video is marked as private. If sphere wants it to be viewed, then the attributes need to be set to public in YT, or those here on the board cant view it.

sphere478

idono... i set it as public when i uploaded it



here good ole photobucket saves the day


again first (double) rev is in neutral second (shakey at the end) is in drive

it drops when ever manifold vacuum pulls on the regulator but surges whenever throttle is open so it seems to be referencing properly right? no noticable dropoff.. that i see

sphere478

hey bob how is this looking any pointers? brian at tbi chips has been givin me a hand we got it running allot better than it was its drivable now

heres the log http://i1150.photobucket.com/albums/...ps20bb32d8.bmp try downloading this link for log

weird.. it works if you download it and rename it to .dat but its only 5 min long..


o well hows it look?

we temporaraly disabled the vac referenced reg and set pressure to 20 psi


btw i posted tat vid above^ click the pic to play

RBob

iTrader: (1)

I watched the vid but with the angle it is hard to tell. Are there other issues in the tune?

RBob.

sphere478

eh just a stumble here, a rough cold start there, bogging after shift here.. etc...

where can i upload a log if you dont mind taking a peek? recommend any hosting sites?

RBob

iTrader: (1)

Zip the log file and attach it right to your post. While making the log file tap the space bar where there are issues. This places markers in the data stream.

Don't woory too much about rough cold starts until more of the tune has come together. All initial tuning needs to be done on a warm engine.

That is of course if there isn't anything drastically wrong with cold/start & running.

Have you done any VE Learns?

RBob.

sphere478

Ok

No havent done any ve learns yet dont think brian thibks the tune is close enough yet

RBob

iTrader: (1)

As long as the AE is in the ball park VE Learns will get the tune close a lot faster then doing stuff manually.

That is a fair bit of cam, likely need to run open loop idle as the O2 sensor is going to lie like heck at low engine speeds.

RBob.

sphere478

ok


hey havin a weird problem here on the wud it shows wrong mph

at 50mph dash and gps ecm reads 46
at 44 dash and gps ecm reads 41
how do i fix that? is that in the .bin?

sphere478

im having trouble with my serial link freezing up im having to unplug the cable many times during logs what was that trick with the baud rate or whathave you..?

any thoughts on the mph issue?

RBob

iTrader: (1)

If the WUD MPH matches the speedometer in the car the proper way to correct them is via the gears in the transmission.

If all you want to do is to correct the WUD MPH, change the PPM parameter for the MPH calculation:

VSS - Pulse Per Mile

RBob.

RBob

iTrader: (1)

Are you using a USB to serial adapter cable?

RBob.