All the gear...
 

I've got all the Gear, and nothing to Run it with...
I've got my Atmel Chips, PM6 Ecu, Rom burner, Zif Socket, Datalogging adapter, and laptop...Now i just need something to tie it all together....Does anyone out there have a Rom editor, i'm assuming ghettodyne is still gonna be a while and i'm dying for boost!!! Hopefully somebody has something that can put this gear to work for me!

Re:All the gear...
 

Georgehack boost code for PM6, you'll need a PGMFI Forum account (free registration) in order to access this file most likely. It should be run with 450-550cc injectors, ideally.

Run this file IN NATURALLY ASPIRATED FORM ONLY, and tell me how it works? I think it's a touch lean, but it should Idle and cruise fine. It's equivalent to a -50% fuel (or AFC) cut, and the ignition maps are set up for 1.0 retard per psi at --40% cut... should be a touch aggressive in the NA region due to the extra -10% cut. Nothing a stock engine would have a problem with.

It (the Georgehack.bin) displaces the fuel and ignition maps 22 places in Ghettodyne 1.03 (newer Ghettodyne doesn't open things not called "Ghettotune"), which makes it pretty hard to use with Ghettodyne... for a newbie.

I'll walk you through, and check your work, and give you all the help and explainations in the world, but you're doing this yourself. 8)

Why don't you open my copy of 91 Si MAPhack.bin in Ghettodyne 1.03.

Off the top of my head, you need to add 20% more fuel to a -50% cut fuel map to get it to work like a -40% cut map. Every fuel pulsewidth figure should be multiplied by 1.2 to accomplish this. I don't think you'll want to change the pulsewidth in the idle area. The last five columns on the right are your "boost" maps... go ahead and make those figures ~1.35 time what they currently are.

Email or post your result or better yet some screenshots so everyone can see what's going on... as soon as you have them, and they look good, I'll show you how to cut and paste that fuel map into the Georgehack file.

Re:All the gear...
 

I can't get ghettodyne V1.03 to work...
It comes up with
" component 'comdlg32.ocx' or one of it's dependencies not currently registered: a file is missing or invalid.

Re:All the gear...
 

http://www.ghettodyne.com/errors.asp :)

Re:All the gear...
 

Weird, i'm running XP...
Anyways, got that geared up...So ur saying i should burn the Georgehack bin, install the 450's before i boost it and make sure it runs fine???

Re:All the gear...
 

Ok, i've got a B18a, if i install the 450's while im still N/A, what changes do you think i should make?? Should timing be the same?? Just maybe a little more fuel?

Re:All the gear...
 

You are B18A, grasshopper? Please to be going here: http://pgmfi.crx-forum.org/phorum/do...d_baseline.bin

This post was bought to you in part by www.engrish.com.

Re:All the gear...
 

Mint, now is that just a base map, or already tuned for 450's?? Also, this may be a stupid question, but you said to multiply the previous fuel tables by 1.4??? Wouldn't it be by .6?? As the adjustment should be -40?? If we put it up 40% wouldn't it run super rich???

Re:All the gear...
 

"Why don't you open my copy of 91 Si MAPhack.bin in Ghettodyne 1.03"

Joseph, this file is only for timing, correct? You haven't touched the fuel pulse in that file have you?

Re:All the gear...
 

Smokey: You are thinking of cutting injector pulsewidth to tune the map for 450cc injectors on a stock NA car or regular standalone setup. In those cases, 240cc/450cc = .53, which you multiply by your 240cc (stock) fuel pulsewidth for the new 450cc injectors to work.

I'm glad you know that, most people don't, but that does not apply in this situation! The AFC hack (or George's code based equivalent) makes the ECU assume the incoming air is at a lower density so it automatically looks lower down on the fuel maps where the pulsewidth is smaller. Fuel is strangely linear in nature (with a few quirks), so you effectively do the injector calibration by fiddling the MAP input.

The ignition maps are set up for -40% AFC hack. I used the AFC to add fuel in boost, but they are the XS engineering fuel maps which are a hair richer than stock ones so it's safer than the regular -40% AFC hack baseline on an LS.

The Georgehack file creates a -50% AFC cut on any maps you insert, compared to stock code. You have to add that 10% back in to get the fuel maps at a baseline -40%. To do that, you have to increase the fuel maps 20%, or multiply the injector pulsewidth by 1.2

Follow my math:

100% of the fuel, with a -40% cut applied = 60%

100% of fuel with a -50% cut = 50%

How much do you have to add to the 50% map to get it back up to 60%? X * 50 = 60, solving for X, X = 60/50 = 1.2

The last five columns in Ghettodyne are your boost maps with the AFC or Georgehack. Adding a little more fuel to those columns is a good idea, so instead of multiplying those values by 1.2 I want you to multiply them by 1.35, which should be a nice safe figure you can tune from.

The idle pulsewidth still needs to be smoothed over... and you can't go below 1.08 ms fuel pulse on a Honda ECU.

This is a lot to choke down at once, and I just spent another all nighter wrenching so my mind is toast and my explainations aren't the best.

DR_MR_PEP: Correct. The maps would work well with an AFC cut of -40% and 450cc injectors on a naturally aspirated D16A6. Turbo cars like to run a bit richer than ~13.x:1 AF under WOT, which is why people start adding fuel off idle with the AFC hack.

As you've probably guessed by now, -50% takes a good bit more fuel than is required out.

Hey, you coming to the Asheville Meet?

Re:All the gear...
 

Joseph...where'd you get the idea my bin cuts by 50%?? It actually only cuts by 37.5% (multiplies by 5/8).
Cutting by 50% would have been easy (simply a single instruction) but it wastes a couple of map columns - hence I went with 37.5%, which gives the uppermost MAP column somewhere near 10.5psig (right near the stock MAP sensors limit).

George

Re:All the gear...
 

George... I'm a tard is why I assumed that. I read everything once and then go from memory... sometimes things get a little jumbled, like when I haven't slept in a couple days. I had a long discussion on performing division in assembler with Blake a week or so back, I think I got a little confused. Thank you for checking in on this thread!

So, add a little fuel to the boost columns and call it a day? :P

Re:All the gear...
 

Ok, so this file here..
http://pgmfi.crx-forum.org/phorum/do...d_baseline.bin
as it is, will do what?? Will this run my B18a with my pm6 ecu as is with 450's?? Or do i only use this once i'm ready to boost??? Also, if this is for boost, how many psi is it good for?? Ghettodyne only shows up to 1.3psi??? I'm lost......

Re:All the gear...
 

you might have better luck reaching him on honda-tech.com, i think he frequents there more, not sure though. im pretty sure his user name is like "j. davis" good luck, hope everything works out and keep us informed as i know at least i myself am curious

Re:All the gear...
 

I respond to email much more than anything else.

HT just has more activity at 4am for a bored insomniac than this board does... I really prefer HMT to anything HT, to tell you the truth.

I pasted my LS MAPhack maps into the PM6Georgehack.bin, added 5-10% fuel to the boost columns, and gave the chip to a local kid running B18A turbo... I talked to him earlier, he had only limped it in and out of the shop door due to no downpipe at that point. It was running rich but would rev past ~2500 (stock ECU with 450cc bogs there), he got about ~1 psi without CEL.

I should know more tomorrow, and I'll be playing with the code in my CRX this weekend as the last of my parts to fix it arrive Friday FINALLY. It's been 4 months I've been limping an oil burning stock DX hatchcrap.

Re:All the gear...
 

good luck, keep us informed as to how it works ... as you're the guinnea pig for a bunch of us :)

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It'll still be a couple weeks, i'm still waiting for my Goddman Mounts, and Manifold....But i'll be sure to include a complete write up, pics and price list, dyno sheets, 1/4 mile times, bin files, the whole deal...........

Re:All the gear...
 

I talked to Wes today; the chip is running and works. I went a little overboard with the fuel, as it dumps black sooty exhaust when you close the throttle under boost and you can SMELL the raw gas (a la the gentleman running -25% fuel with the AFC boost hack).

Wes and I have completely disparate schedules, and the carolinahondas.com Asheville meet and Deals Gap run are this weekend... I probably won't have any tuning time on his car until Monday - I should have mine running before then anyway. The maps in the MAPhack LS baseline NEED to have the idle injector pulsewidth tweaked as it's too rich, and 5-10% more fuel under the boost tables is a bit much.