Cyl Displacement

[Canyonero]

I'm working on the BIN for my Trooper, $88 BAWX from a 90-92 Camaro/Firebird 3.1L. I actually have a 3.4L, so I'm looking for where I change the cyl displacement as per the 1227730 Basic Tuning and Features Q&A

There is no hex value as described there, how do I found out where it would be in my BIN?

When I started on this in TunerPro, I saw a Constant labeled "Number of Cylinders". The value there was 192. Does this have to do with the displacement? Because I know for a fact that these engines only have 6 cylinders.

[Superdave]

i've never had to change anything relating to engine displacement. I'm using $A1 BFUZ though. I'll look in my $88 .xdf but i'm pretty sure it dosen't need that.

That 192 just means it's a V6. I edited my .xdf to change that value from simply X to .03125*X so it always shows 6.

[923.4v6]

I just got done looking at the 88 there isn't a place for displacement, the 192 means 6 cyclinders. That tuning page your looking at is for 8D for a v8 and they do have a place to change the displacement. If you want to use the 88 just load it and start tuning. The BAWX is for a 5-speed though AZTY is for a automatic.

[Canyonero]

Awesome, I'll crank that back up to 192 and hope for the best. I did change my injector constants to reflect the 17lb injectors I have in the 3.4L. Anything else I should tweak?

I just finished stripping out all my old injection wiring (the Fuel Injection Specialties wiring that I paid a lot of money for...). Hope to have the 1227727 wiring installed this evening. Doing the finishing touches on it now, heat tape, fuses, relays, etc. Progress!

[923.4v6]

Yes, leave it on 192. But honestly I would think about going to DIS and using a fwd bin. There's not that many tuning the $88 stuff which means you won't get that much help if you need it, and it's really easy to change over to DIS thats what I did. But you can just load the $88 bin and it should fire up and run with no changes at all done to the bin.

[Canyonero]

I believe that $88 supports DIS. I'll find out soon enough I guess.

My engine, sans-wiring:



New wiring:

[923.4v6]

It will just put the Initial Spark Advance at 59.8 degrees, there's just not that much tuning support for it.

[Canyonero]

It will just put the Initial Spark Advance at 59.8 degrees,

I don't know what that means.

[923.4v6]

Its your distributor spark timing usally around 9.8 degrees. To run DIS you have to change it to 59.8 degrees, But since your going to run a distributor just forget what I said about it. Or are you going to run a dizzy?

[923.4v6]

From the picture you posted you are running DIS so set the "Initial Spark Advance" in tuner pro constants/scalers to 59.77 degrees.

BTW a couple post up should have said "Yes just put the Initial Spark Advance at 59.8 degrees, there's just not that much tuning support for it." instead.

[Superdave]

wait, back the truck up and please check your facts before posting. You could seriously mess up someone's engine here. The initial spark advance and spark referance angle are totally seperate things.


OP, if you are running DIS then don't use that old Camaro code. Start off with $A1 code, much better tuning support and overall easy to tune.

[Canyonero]

From the picture you posted you are running DIS so set the "Initial Spark Advance" in tuner pro constants/scalers to 59.77 degrees.

BTW a couple post up should have said "Yes just put the Initial Spark Advance at 59.8 degrees, there's just not that much tuning support for it." instead.

Got it, thanks. I'm glad I got the adapter with a ZIF, I think I'll be doing this a lot for a while. I might try a different BIN later, but right now I just want something that will run the stock engine out-of-the-box. I'm more interesting in verifying my wiring than performance tuning right now.

wait, back the truck up and please check your facts before posting. You could seriously mess up someone's engine here. The initial spark advance and spark referance angle are totally seperate things.


OP, if you are running DIS then don't use that old Camaro code. Start off with $A1 code, much better tuning support and overall easy to tune.

Waiiiiit, what? Which is it? What do I need to tweak to make $A1 work with my iron head engine? I just need something that will start and run this engine right now. I can switch to $A1 later if that's better for tuning, but I need to verify everything else first.

[Guest]

wait, back the truck up and please check your facts before posting. You could seriously mess up someone's engine here. The initial spark advance and spark referance angle are totally seperate things.

Eh? These are usually interchangable terms when it comes to XDFs. I've seen both terms used to describe the same variable.

OP, if you are running DIS then don't use that old Camaro code. Start off with $A1 code, much better tuning support and overall easy to tune.

I do agree that starting with $88 might be more work than it's worth.

Starting with $A1 would likely be a better place to start, mostly because there is not question on whether the DIS will work or not.

Some of the VE and spark table will need to be tweaked, but nothing major. I would bet dollars to buttons that $A1 will start the 3.4 just fine and even allow some driving around.

There won't be any code that you can plug into the ECM you are using now that will be perfect right off the bat, but there will be some that will be very close and work very well to start with.

[Superdave]

I just loaded up $88 and BAWX. The initial spark advance is similar to $A1. Leave it alone. It should be 9.84 degrees. I don't even see a value for the spark ref angle, probably since the iron head 3.1's aren't DIS and don't use the 7x crank trigger.

If $88 is like $A1 then those injector constants are just for display, they don't actually do anything. Your global fuel injector adjustments are made to the BPC vs EGR table. I don't know how much the bin i'm looking at has been adjusted so i can't exactly give you the proper numbers to put in there.

I can tell you, if you are running DIS then i'd 100% switch over to $A1 code. I will even help you out with a starter bin. If you really want to stay with $88 then email me your current bin file and i'll have a look at it.

If it's just a stock iron head 3.4 and you just want to get it running i'd put in stock camaro 3.1 injectors and run it on the stock 3.1 tune. There isn't much VE difference between the 2 engines and the computer should handle the fueling just fine.


*Edit.. Chris, the spark ref angle is relative to the 7x timing ring used for DIS. Initial spark advance is pretty much nothing.. it's added to the total but subtracted.. it never shows up in the "SA relative to TDC" logs.

[Canyonero]

I'd rather not change my injectors, they're new (or were a year ago).

So, the consensus is that $A1 should start my truck with no modifications?