Hello guys...

I was toying with the possibility of looking for pro help to change the lt1 pcm's code to actually see bost with variables similar to the $58 ECM (syclone) and some additional tables that I think are useful for us...

I thought if
1)Removing the MAF limitation
2)rescale the tables to accept a 2 bar map sensor
--a)Timing and VE tables
3)Change the parameters as to 100kpa is to the pcm related to the map sensor
4)add a IAT vs timing table (which i believe it has)
5)add a PE enrichment vs MAP table or and a few other goodies...

I was quoted in the vecinity of $5k-$10k for this proyect... maybe it can be done.. maybe it cant...

What do you guys think about this?

If we could get enought people that use the stock pcm we could do a "group purchase" and have this job done that will benefit a LOT of people inside the community...

Let me know what you guys think about this. Worth it or not?

 

I have another theory we are testing...using 3 bar map and APex S-AFC. Should be alot cheaper....

Jose

 

How is this?

 

Wouldn't it be better and cheaper just to use an aftermarket system?

 

I don't want to let to much info out. But it will use an external 3 bar map sensor in its own case, and dedicated fuel computer. No laptop, no software...etc. It will be soley for controlling fuel. Timing we will leave up to LT1 edit, since their is no reason to re-invent the wheel.

Jose

 

Chad, every priced out a FAST system even without the wideband??? Its over 1500, and DFI 7 is a little more if I remember correctly...

Jose

 

I kind of figured they were in that price range Jose, but I guess it depends on if that $5k-$10k price quote was for the initial engineering and then what it would be per unit for a group purchase.

If a wideband could be added to that list I think it would be better.

 

Not to mention with a DFI or Fast you have to spend time and cost to tune it if you cant yourself - and that takes a LOT of work.

Using an S-AFC would be cool, but I dont know how much play you'd have in the variables... I love those things, but dont know how well it'd interface.

Anything about using the stock ECU, I'm all over it like white on rice on a polar bear in the middle of a snowstorm.

 

Geoff, you will like what we have then. And yes it will still use the stock ECU and be under ~600.

Jose

 

look up megasquirt.

full independant control of the fuel delivery. 3 bar map built in. Stand alone. ~$150 bucks in parts. Program it yourself.

 

I know about megasquirt- A friend of mine is using a custom tablet PC case for it and all sorts of other things. But he's a programming nutjob, and I'm not, and he doesnt know much about piston engines- His car is a 4-rotor 2.6L - and he's looking at turbos

 

I've seen the megasquirt many times, but it has limitations, and unless your well versed in assembly, its not easy to redo maps for it.

Jose

 

If you can program the megasquirt you can redo the tables on the lt1...

Anyways I will keep researching this...

 

I would be very interested in this... hell even getting some info on the Harlen's setup and how he managed to successfully run two MAF's in parrallel would be great so you could get away without maxxing the single unit.. this should give you much more accuracy with the fuel curve fueling! but if that is the initial cost for the engineering then that is not too bad.. just have to figure out what it would cost in parts and what exactly would be needed to be able to replicate it after it has been worked out on the prototype. but yes keep me posted!

Chris

 

I think it's just a matter of disassembling the OS on the flash, and rewriting certain parts to make use of a 2 bar or 3 bar map sensor. Not exactly an easy task though.