Electronics for the Redline

[dL_RL]

spooner have you ever looked at the SMT6 tuning software? I have it on my notebook and shit! I don't even know where to start!!

[WopOnTour]

Originally Posted by Sp00ner

You're saying that the car advances timing when not under load, I get it... like when you let off the gas and your timing jumps up to like 40 degrees while coasting? So, the car thinks you're not under load, gives you a ton of timing, which in this case, you don't want, and then the trouble starts... I get it... I see!

Originally Posted by dL_RL

Exactly! Jmc007 is the one who discovered it and i just backed up his theory because our setups are so similiar.

LOL!!
DL are you saying you and JMC have discovered basic engine timing theory?
Timing is, has and always will be affected by RPM and load (typically by referencing manifold vacuum)
Ever heard of little thing called a vacuum advance unit used on old distributors?
(vacuum=more advance, more load=less vacuum therefore more load= less advance)
and vice versa!
Engines havnt changed, but the tools used to control ignition timing have!!
Maybe try combining your MAF adjustments with some different MAP (or BARO?) clamp settings DL...
OR
Pay someone like TC to do it for you... lol/jk ...
well sorta j/k... not trying to be a dick but "trial and error" piggyback tuning without being well-versed in basic engine theory could spell a formula for disaster!

WopOnTour

PS> Here's a couple of TYPICAL PE timing maps for a boosted application for a point of reference (these are not for the LSJ)

[dL_RL]

Oh no no! We are not saying we discovered nothing. We are just saying we figured out our knock issues...that's it!

I know it's not a big deal and is simple engine timing, but hell I didn't know! So I learned something new..

Originally Posted by WopOnTour

LOL!!
DL are you saying you and JMC have discovered basic engine timing theory?
Timing is, has and always will be affected by RPM and load (typically by referencing manifold vacuum)
Ever heard of little thing called a vacuum advance unit used on old distributors?
(vacuum=more advance, more load=less vacuum therefore more load= less advance)
and vice versa!
Engines havnt changed, but the tools used to control ignition timing have!!
Maybe try combining your MAF adjustments with some different MAP (or BARO?) clamp settings DL...
OR
Pay someone like TC to do it for you... lol/jk ...
well sorta j/k... not trying to be a dick but "trial and error" piggyback tuning without being well-versed in basic engine theory could spell a formula for disaster!

WopOnTour

PS> Here's a couple of TYPICAL PE timing maps for a boosted application for a point of reference (these are not for the LSJ)

[WopOnTour]

Originally Posted by dL_RL

Oh no no! We are not saying we discovered nothing. We are just saying we figured out our knock issues...that's it!

I know it's not a big deal and is simple engine timing, but hell I didn't know! So I learned something new..

LOL- Just funnin with ya DL... KEEP ON LEARNIN!!! (trust me it NEVER ends)
Wop

[dL_RL]

Originally Posted by WopOnTour

LOL- Just funnin with ya DL... KEEP ON LEARNIN!!! (trust me it NEVER ends)
Wop

haha no harm..

Hey do you know if the MAF-Translator Plus will work with the 2.0L LSJ. I NEED IT MAN! It will solve my issue if it works!



http://www.maftpro.com

[WopOnTour]

Originally Posted by dL_RL

haha no harm..

Hey do you know if the MAF-Translator Plus will work with the 2.0L LSJ. I NEED IT MAN! It will solve my issue if it works!

Well I can help you to wire it into the correct circuits of course, but after that it's just play play play until you find out what works!
That can be expensive on a dyno, I personally prefer WOT passes up my alley until I find a few combinations that appear to work OK on the butt dyno, then recreate them next time on the rollers. Buy a BIG 500 page scribbler and TAKE A LOT OF NOTES AND DOCUMENT EVERYTHING YOU DO!!
Wop

[dL_RL]

Originally Posted by WopOnTour

Well I can help you to wire it into the correct circuits of course, but after that it's just play play play until you find out what works!
That can be expensive on a dyno, I personally prefer WOT passes up my alley until I find a few combinations that appear to work OK on the butt dyno, then recreate them next time on the rollers. Buy a BIG 500 page scribbler and TAKE A LOT OF NOTES AND DOCUMENT EVERYTHING YOU DO!!
Wop

That's what i'm planning, do a bunch of deserted road runs, record on the interceptor, log everything on a note pad. Get the best settings I can on the ass dyno and interceptor readings. Make a dyno appointment and run it and play around with a couple of my settings.

So it will work! Interesting! Would you be able to help me with the wiring. I will buy it if we can get it to work...

[ArrivalBlueSS]

Originally Posted by Sp00ner

That's what I was thinking... need to get a wideband before I blow up my car...

I just got a Turbo XS tuner lite for my ride. Hooks into the dtec so I can datalog, rpm, knock, map (load), and MAF.

Just need to get the bung welded into the downpipe.

The best part of the SMT6 is it lets you fool multiple sensors at the same time.

[JPK]

Seems as if we want to tune our cars "properly" we are stuck waiting on GM to come out with the kits.

This sucks because I have almost everything I need right now (2.8 pulley, colder plugs, 42lb injectors) except some sort of engine management. I was gonna get the MAF-T but if it just causes the engine to advance the timing too much and cause knock, then it doesn't seem like a safe option.

I'd like to look into something like the SMT6 but like DL, I'm not real saavy on being able to tune the engine myself.

[jmc007]

Originally Posted by Twincharged

The thing about the LSJ is that it has whats called an "Odd Tooth Crank Trigger" this crank tooth pattern replicates it's self every other turn of the crank so it can not be advanced with the SMT6 only retarded. Once again from my data logging, the LSJ doesn't run a whole lot of ignition timing compaired to the SRT-4. 22degrees peak compaired to 30+ degrees on the SRT-4 (talk about riding the knock sensors). The way I wired the SMT6 it does not have direct control over timing only fuel. For me this is not an issue. I prefer to run boost vs. timing for more HP.

Twincharged, how about retarding it (as an example) by 355 degrees, giving 5 degres more timing advance ?