I need some help here, i just swapped a 355 with some goodies into my car in place of the 305 and now im tryin to tune the thing, and i was wondering if anyone could email me a stock 350 bin file for a starting point. i realize this isn't a classified ad section but i'd appritiate the help if anyone can give it to me thanks


rkellerhals@yahoo.com

 

Check out the prom burning intro on this board. It has links to what you want. www.moates.net/fileman is a good one.

 

Look for the aujp bin if you've got an auto.

 

just a quick question, did you change the knock sensor too?

 

Youll have to change the knock sensor, ESC module, injectors, and ecm.

 

injectors are covered
it doesn't show a code for knock sensor?!
ecm?! i thought that's why im burning a chip for it?
thanks for the link, i'll see what i can find for a manual

 

Please post which EFI system you are using, and the year? ECM service # and MaskID are better. The TPI, TBI, and MPFI all use different MaskID's, and different ECMs over the various years and engines.

Thanks,

RBob.

 

It wont show a code for a knock sensor, but trust me, you need it. And as rbob said, please post your setup (tpi, tbi, ecm#, etc) so the gurus can better help you.

 

If you don't understand what RBob has requested regarding ECM service # and Mask ID, be sure to read the following items:

http://www.edgesz28.com/edgesZ28/sub...it_all-200.pdf
https://www.thirdgen.org/newdesign/tech/promintro.shtml
https://www.thirdgen.org/techbb2/sho...hreadid=238965

Good luck , Ed

 

His car was a 305 TPI to start with.

 

The problem you're going toi run into is there were no manual transmission 350 configurations to start with. Only autos came on the 350's.

Been there and done that, so to speak.

I started with AXYC, the last 305 manual bin (updated from GM), then pasted in a 350's spark tables and fuel tables, injector constant, EGR/CC stuff, and then started tuning by driving. I've got a 350 auto prom (factory AUJP) piggy-backed off my Moates adapter for a closer limp home mode than the AXYC would be.

Does this make any sense? Not a pretty/easy picture, but unfortunately about the only way to do it.

At least until someone is willing to take on a Super_AXYC project similar to the one for AUJP....

Get ready to learn prom tuning and burning.

 

I have an AUJP that's been modified to run with a T-56, not overly difficult to do. Very easy as a matter of fact.

I'm using AXCN now (vette bin). Paste in your tables and what not and you should be good to go. Do note, that the O2 constants are different. I can't say what's better or worse as I have no WBO2 to validate against. I am running the ZR-1 heated O2 sensor, so I stuck with the AXCN O2 Constants. I'll probably switch over to an AFS-74 later on, as Rbob likes that one.

Oh, watch the spark latency table in AXCN. You will need the F-body spark latency, not the vette one. It ran extremely rough with the vette table, and lots of knock. Also watch the CCP solenoid setting. I'm not sure why the F-body table has something along the lines of double the latency. I thought the ignition was the same between the 91 Y-body and the 91 F-body.

I chose AXCN because of the "patches" that have become available. They are only there for AXCN and AUJP.

 

sorry for my huge delay, my desk top took a dump.

1991 z28 Came With 305/auto
Now Has 355 TPI with t56
10:1 compression, 94 lt1 cam, 64 cc heads flowing 235 at lift, no egr valve, relocated MAT to air box, shorty hedders, single 2 chamber muffler, 3.73 gears, manifold is stock and car is running on a 180 degree thermostat, with a factory 7730 ecm, it's currently got a 19lb injector in it, but lt99ls1 is modifying the tables for a set of 24lb injectors, i believe the mask id is $8D, but i am new to all this.


PS you getting all of this larry?


can i get a brief explaination of why i need the 350 knock sensor?

 

Since you relocated your MAT

MAT recalibration 1
MAT recalibration 2

 

i looked through the tech articles but i didn't see anything.
lets see if i can word this right.

i think the term is "acoustic calibration", i could easily be wrong though.
with the bigger bore the "sound" of the motor changes, not what the exhaust sounds like, but the sound or vibrations of the motor. the knock sensor is calibrated for a certain range of frequencies, change the size of the motor & the frequencies change with it.
a 350 knock sensor won't work as is should on a 305 for the same reason the 305 sensor won't work right on a 350.

maybe someone will post up a better explanation than this, or correct me if im wrong.