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2G Just picked up a 2G with 1G head....need advice please.

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rangerguy

20+ Year Contributor
162
4
Dec 10, 2002
Newport, North_Carolina
AFAIK.......anyhow.

Im familiar with HPTUNERS when I had my 06 Cobalt SS/SC, and ever since then I have NOT been a fan of piggybacks. The car itself has

1. 1G head with 2G block.
2. 16G?
3. Various mods, some sort of DP, upgraded SMIC, etc.

IDK what injectors are in it.

But.

Am I correct in assuming they must be the stock ones....as the SAFC cant tune for diiferent size injectors? PO is checking with the guy who he bought it from to find out.

I think I may be better off just pulling that SAFC NEO, resoldering all connections and tucking that pcm back up, and just running DSMlink or Tuner Pro (if you can use it with a 2G). Suggestions?
 
Ill see at lunch if I can check. Thanks for the reply. I will post back :)


Although whats your suggestion for tuning. It has a wideband in it atm. Or at least the gauge for it.....AEM I have to jack up the car and look :(
 
Dsm link is probably the best for where you are and the price. The capabilities are good. It's a bit high for initial purchase but its worth it.

You could also look into chip burning.

Another option could be looking for a used series 1 aem ems. They are expensive and much more than you need but you will never have to upgrade. The aem is a very nice system but is much more than most of this forum will ever need. A series 1 could be picked up for bear the price of a new dsm link full. Series 2 would be more expensive.
 
Dsm link is probably the best for where you are and the price. The capabilities are good. It's a bit high for initial purchase but its worth it.

You could also look into chip burning.

Another option could be looking for a used series 1 aem ems. They are expensive and much more than you need but you will never have to upgrade. The aem is a very nice system but is much more than most of this forum will ever need. A series 1 could be picked up for bear the price of a new dsm link full. Series 2 would be more expensive.

I think I will undo the wiring for the safc neo and get that back to where it needs to be. Sell that to fund the link and save up. First thing I have to do is finish putting the small things back on LOL. Will the car fire up and run with 660s if that's whats in there.....I imagine it would but run VERY rich and/or poorly. TY
 
Verify the injectors and report back. I wouldn't go ripping shit out, when you don't even know what your ripping out and how it affects the system.

Oh yeah, I don't mean right now LOL. I will get more info before I do. I realize I misrepresented what I want to do.

Lol..........FIRST see what I have.....SECOND see what I need.....THIRD put into action ;P
 
The mind of an engineer.

I went to take pics but my camera doesn't want to focus. So I looked at a couple of them and they all have 550 on them like they have been engraved? So. I put the battery in from my Fit and tried out some things. Everything works! Except the power door locks on the passenger side.

I plugged in the NEO. Nadda. IDK if that's the unit or some wiring. Makes me wanna go through the wiring and solder it.........wheres my iron?

Pretty sure I will pull it out and save for link.

Suggestions?

I took SOME pics but the camera died and I don't have a sd card reader on my work comp :(
 
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Off topic....but

Sorry but what does this mean in relation to the coils on the head swap...from Magnus?

"Swap Plugs 1 and 4 with 2 and 3 (order is not important)"

What the hell does this mean? With the coils is it literally saying to switch the plug on coil end or is it saying something else? Anyone have a pictorial guide?
 
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Will the car fire up and run with 660s if that's whats in there.....I imagine it would but run VERY rich and/or poorly. TY

Not necessarily. The SAFC can account for different injector sizes, although it is a rough adjustment.

Basically, 20% larger injectors mean you should subtract 20% in the airflow reading with the SAFC to compensate. The engine thinks there is that much less air, so it shortens the injector pulsewidth by 20%. But the larger injectors flow 20% more to offset this. And as a side benefit/problem, you are getting your timing advanced as if you are flowing less air too. DSMLink isolates the fuel and timing because it isn't lying about the airflow to get the result. Instead it directly controls the fuel and timing calcs and allows each to be adjusted more precisely.

Now the 20% numbers I gave above are just very rough examples, If you actually do the math, on an injector that is 20% larger, you'd want to subtract out closer to 17% airflow. (1-0.17)x1.2=0.996

If your injectors are 550s, they are 18% larger so the above numbers are pretty close.
 
Off topic....but
Sorry but what does this mean in relation to the coils on the head swap...from Magnus?
"Swap Plugs 1 and 4 with 2 and 3 (order is not important)"
What the hell does this mean? With the coils is it literally saying to switch the plug on coil end or is it saying something else? Anyone have a pictorial guide?

Its because our engines fire cylinders 1&4 at the same time then 2 & 3 at the same time. Therefore the order will not matter as long as the grouping is right.

Is the Ecu a black box? If so you can re-flash it and log it with evo scan / ecu flash. Are the tops if the injectors pinkish? They may be evo 550's. Regardless i would check the base timing first make sure everything checks out and the tension is right. Then move onto the spark issues. Has it ever ran once the head was put on?

what year 1g was the head from is it a 6 or 7 bolt?

Read through this it should help you.

http://www.dsmtalk.com/forums/showthread.php?t=238490
 
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IDK what you mean by a black box? Is the pcm on the drivers side of the center console black? IIRC yes, and has yellow plugs into it. Tops are not really any color....black maybe?

PO said it would crank fine but he could not get it to fire. He is a V8 guy and doesn't have a whole lot of experience with them.

I found a set of IG coils in the trunk, no bracket. I really need to get some parts coming in and start another thread once I get further in.

My reasoning is....if I don't plan on running this SAFC NEO and plan to link it or something. It wont matter because that's a whole new game. First step put the car back together. Plug in what I can, mount the coils, get wires, coolant and that sorta thing. try to start it.

You know I tried the NEO, thing didn't come on. Maybe the whole damn problem. I mean will it run if it was broken? or wired poorly?
 
Thanks for ALL the help so far btw. Nice community you guys have here :)
 
Hard to say if it will start. I never placed larger injectors in my car when I couldnt account for tuning them. (Never a smart thing to do.)

If its going to take you a bit to get link and you want to drive it, I have a set of stock injectors. PM and Ill hook you up.
 
Hard to say if it will start. I never placed larger injectors in my car when I couldnt account for tuning them. (Never a smart thing to do.)

If its going to take you a bit to get link and you want to drive it, I have a set of stock injectors. PM and Ill hook you up.

Thank you! I may take you up on that. My bro from another mo has a couple of sets of injectors atm. IIRC he has some stock 450s. Ill check. Just to get it running and since I plan to go link anyhow. Slap those in.....and correct the bobo wiring connections (IMO). Get it running at that point on stock stuff at least. Get link and throw the 550s in with a appropriate base map.....Blamo. Win?
 
550s will only support around 250 horse. Look at getting a walbro 255hp and a rewire kit too. May be able to get a little more out of it.


I think my number one priority is to get it running LOL. As I am sure you will agree. Get it running in a good baseline oem setup....then mod the hell out of it. Wow though IDK 550s were only good for that much. Must be the car? My bros car (h22 92 swapped prelude) running 14 psi or so ran 550s and made 360 or so before it ran out of breath...makes me regret getting rid of the 1000s I had LOL.
 
When i say black box i latterly mean does the ECU look like a plastic black box? like this pic attached?
IF so you are in luck and can tune it without link. it would be perfect for you right now. They only come in the later year 2g. Go check!
 

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When i say black box i latterly mean does the ECU look like a plastic black box? like this pic attached?
IF so you are in luck and can tune it without link. it would be perfect for you right now. They only come in the later year 2g. Go check!


Yes sir that's it. Pardon I am obviously a noob. How can I tune it without link?
 
I would not recommend open-source tuning for someone with little to no experience on this platform as there are no "safety nets". ECMlink is pretty idiot proof(no insult intended) and will most likely be anything you'll ever need. Also you mentioned a AEM wideband, while it is a decent wideband, it doesn't like to log correctly with link. You can spend hours trying to get the scaling correct to match the gauge with the ecu, then the next day it will be off again.

As for your spark question. hopefully this little image from ecmlink wiki will guide you in the right direction.
You must be logged in to view this image or video.


I would also suggest trying to bring the car back to stock. Start checking/replacing the basics.

1: Spark ($3 spark tester from an autoparts store.)
2: Fuel (is there fuel in the rail? after several attempts to start pull the plugs and see/smell them for fuel)
3: Compression test it. No one cares what the previous owner says.(in fact i usually bring my compression tester along before purchasing a new vehicle.
 
Thanks! I haven't even tried to start it yet. Waiting on title atm before I sink a penny in it.

I assume you can do basemaps right? Enough without DSMlink so to speak to say get it running and driving to a dyno?

Quit honestly flabbergasted as to how helpful this community is. Ive literally been around with cars and forums and most are pretentious dip shits telling me to search....blah blah blah. Really impressed so far. If I didn't thank you personally so far........THANKS AGAIN for all the help to this point.
 
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