Still tuning, everything is still a little rough especially since the switch to the big injectors. Its still lightyears ahead of the carb.

I have WOT almost tuned, but, mid 5000 range the engine runs sour, my data logs show a very lean condition (13.5:1) and i have been trying to correct it, It seems to just want more and more and more fuel.

Im at the point where despite running the 80.5 lb injectors at 20 psi with a bpw of 68 im upwards 95% ve in the tables there. I think I might possibly static yet again or coming close to being static.

Just for fun I redid the fuel to hp calcs and according to the ones out there with 200 lbs of fuel at 85% duty cycle you can make 340 hp at .5 bsfc. Obviously the calc isnt working for TBI, i think its because tbi injectors end up firing twice as much.

 

did you ever think about add ing a set of injectors like they do with some of the blower setups


some thing like have a microswitch that comes on at just about full throttel and at some thing like 4500 rpms you couls pbly use a lead off a shift lite to trigger a relay and that triger a ocolating injector driver. this would i think add the needed fuel.

 

Have you tried outputting the BPW through the ALDL? That would tell for sure if its going close to static.

 

nope, no need to, i can just keep increasing pressure. These injectors are good to very high pressures


and

Nope, I should get around to doing that these days. As of now the only datalogging i do is via my wbo2 data logger which has inputs for map and tps (is basically real time fast)


I went for a test run and it appears I have managed to give it enough fuel. It took the 96% ve I mentioned above to do it. It runs pretty hard, just needs some fine tweaks to get it perfect.

 

Glad to see you back to tuning the TBI Pablo.

Sorry if I missed it elsewhere but what WB are you using?

DM

 

its made by Tech Edge out of australia, you can read more about it at www.wbo2.com

Someone will surely chime in with something negative about them but, as with everything there are two sides to every story and I've only heard one.


As far as its function, I think its the greatest car related thing I've ever purchased.

 

Yep, your right, just some folks don't endorse piracy. If they hadn't violated the users agreement, then there wouldn't be any negativity surrounding them, but since they stole the DIY-WB and turned it into a for-profit item, they made their own bed, as a matter of speacking.

Luckily, there have been other manufacturers that designed their own, like Innovative.

I guess as long as folks deal with pirates, we'll not have any of the engineering guys public domain anything new. It's really sad seeing so many people that know otherwise ruin things for the good guys.

http://www.innovatemotorsports.com

There are also some GPs from time to time on the Prom Board.

Not to mention that buying foriegn and the related job loses, are/should be everyone's concern.

My Innovative has been in numberous street cars, and a few 10 sec cars, without a problem. And is going on a year old. My DIY-WBs are now approaching 4 years of full time use.

 

I will second the innovative. It is a great product. A couple of us here used one this weekend to tune a member of this boards 383 powered GTA.

 

how did i know that was going to happen

 

and now since this thread has gone to hell I might as well as add that, again, that is your side of the story and I never pass judgement when there is not equal representation.

Regardless of that, the unit I have doesnt even use the same sensor as the diy unit, and the diy unit didnt have a datalogger with mutiple inputs to include egt etc.
Ive seen the innovative in action in person and personally I believe it to be less of a value than the tech edge unit i have, you have to lug around this big case with a small LCD screen and no logging capability unless you pay extra (which is above and beyond what the tech edge unit costs) as far as the tech edge reliability, ive driven with this thing mounted permantly in my car for the past year and a half, from extreme heat to extreme cold, the display isnt even hard mounted in my car and has been known to fly around when I pull it out of its temp location to look at it, its taken some whacks and it still works like the day I installed it.

Not to pass judgment on anyone, but ive been around the block enough times to just take anyone on their word unless they are close confidants of mine.


BTW, I hope more and more people start selling efi related things. That would get EFI into the hands of the masses far quicker and would improve the quality of eprom tuning more than any diy-efi-socialists ideas of giving things away.

Adam Smith once wrote in "The Wealth of Nations" "[man] frequently promotes that of the society more effectually than when he really intends to promote it. I have never known much good done by those who affected to trade for the public good."

its true about economies and its true for DIY EFI

 

I am not even going to respond back to that last statement. But i would urge you to look at your computer/software tech. Most of the current inovation is in the opensource community. But I guess nothing good could come from a bunch of people working together, and not charging each other.

 

Thats because most software is pirated anyway, thus the incentive to make for profit changes is little unless its a major release of something in which case you are targeting corporations and the US govt as your main consumers


But I digress, if you want to have a debate concerning capitalism vs socialism contact me on ICQ or AIM.

 

Hehe

What do you shift it at and can you get fuel all the way up to the redline no problem?

Tony

 

I shift at 6 and getting fuel at 6 is no problem. It only needed alot of fuel at peak demand which seems to be mid 5000 range.

 

3 things to note:

-What is your timing (maximum advance)set at? Have you tried retarding it to eliminate the lean condition @ High RPM?

-You are swift enough to note that the motor is peaking at 5500-5800 RPM why would you want to rev past the engine's maximum power band?

-Not sure what TBI you're using but looking at your calcs. it appears you're only running 2 injectors. Increasing fuel pressure is a good way to cheat but will only get you so far. Can the stock ECM be modified to fire 4 injectors, if so that will let you run a larger TB unit.

I have 4 85#/hr injectors which will support around 650 HP, but then again I am using a aftermarket system. I realized the shortcomings of the stock TBI system (from a fuel supply perspective) that was enough for me to ditch it.

It's all matter of what YOU want to do with YOUR car. I think the stock TBIs is great for a daily driver, not for a street/strip, or race car but that's my opinion.

Good Luck

 

I didnt hit a wall with my tuning or anything, I managed to get enough fuel just making a few more burns. I actually had to bring the ve back some because I went too far.

In reality, I can push this setup to a good bit further than what its at right now fuel wise, im only at 20 psi, the pump i have is rated at 35 and injectors like these have been tested good to 70.

I did some more tuning last night and i have it pretty close to dialed. I think two more burns at most and this sucker is gonna be on the money. As it is right now it hauls ***.

The tbi is far from stock too its a holley unit with GM injector pod with shaved throttle shafts and radiused inlets, i run a NOS external regulator too. I think im going to surprise some people with my track times. Its running pretty well

As far as my shift point, the peak fuel demand is actually supposed to be just slightly after peak torque. Horsepower doesnt peak till a little later of course. I may try experimenting again with shifting lower but as it stands my best et's are from shifting at 6k

 

that was nice... i never really expected anyone to quote Adam Smith on the site but im continually surprised everyday. Pablo... my hats off to you :hail: :hail: :hail: :hail:

BTW, what are your mods?

 

Yeah!

Give it up!

~C