| 4g61t.org http://www.4g61t.org/forum/ |
|
| 4G37/4G63 SOHC: Possible upgrades for 4G15 ECU http://www.4g61t.org/forum/viewtopic.php?f=17&t=6396 |
Page 2 of 5 |
| Author: | The Ethereal [ Thu Dec 04, 2003 2:28 pm ] |
| Post subject: | |
Probably you have an A/F ration of 14:1 or so @ WOT instead of 13.0:1.  I'd really like to try the 4G63 SOHC. The injectors are good for almost 150HP @ 70% duty cycle. Also, driving should be somewhat smoother. However, the spark & fuel maps are probably totally wrong. The 4G37 should be better suited. But hey, how about a G4CS MAF on a 4G37 ECU? Should work somewhat better I think.
|
|
| Author: | Berserko [ Thu Dec 04, 2003 7:41 pm ] |
| Post subject: | |
I'm not leaning to motor my O2 voltage is right on par .92v or so... Well if I can find a some ECUs that are eprom it can all be fixed we know how fuel and timing and all that is done by ECU it is within our grasp... 
|
|
| Author: | kjmerkel69 [ Thu Dec 04, 2003 8:40 pm ] |
| Post subject: | |
Quote: I'm not leaning to motor my O2 voltage is right on par .92v or so...
Seems to me that would indicate a rich condition rather than lean. .92 is almost at the end of the 1v operating range.
|
|
| Author: | Berserko [ Thu Dec 04, 2003 9:43 pm ] |
| Post subject: | |
From what I read during a WOT run .9-.92 is exactly where you want to tune your car for... |
|
| Author: | The Ethereal [ Fri Dec 05, 2003 7:03 am ] |
| Post subject: | |
Yep. I've done wrong w/ that 14:1 crap. The O2 sensor can read from lambda 0.9 to 1.05 (A/F 13.23:1 to 15.44). Maybe the car was running w/ lambda=0.85 (A/F 12.5, mixture is getting somewhat hard to ignite below that), as Jason once suggested. Could be it is now running @ 13.3 or something just on the edge of the sensor being able to measure. |
|
| Author: | The Ethereal [ Sun Dec 07, 2003 1:43 pm ] |
| Post subject: | |
Hey guys, if the 4G63 SOHC stuff works, this may be the perfect ECU upgrades for turborized 4G15s. I came up w/ this when calculating the possible power from the 240ccm injectors and wondering what that much power could be used for... and then I remembered Ricehunter's 4G15T manifold. 
|
|
| Author: | socrateez [ Sun Dec 07, 2003 5:30 pm ] |
| Post subject: | |
I installed the injectors and maf from a 1.8l sohc today! There were idle issues at first but after comparing MAF's i found a solution. I plugged the small holes in the sides of the maf and it runs fine. A little rough at first. Going to drive it for a few days so the ECU can adjust. Seems to offer more bottom end umph. This is definately a doable mod! Check out this post to see what i mean about the holes: http://www.4g61t.com/forum/viewtopic.php?t=6523 Next is to find a ECU! |
|
| Author: | kjmerkel69 [ Sun Dec 07, 2003 11:13 pm ] |
| Post subject: | |
Quote: Next is to find a ECU!
I have one, let me know.
|
|
| Author: | The Ethereal [ Mon Dec 08, 2003 2:50 pm ] |
| Post subject: | |
More bottom end is what every 4G15 driver is searching for! Woah this all makes Adrenaline rush through my veins! 
|
|
| Author: | socrateez [ Mon Dec 08, 2003 9:27 pm ] |
| Post subject: | |
Quote: Quote: Next is to find a ECU!
I have one, let me know.I'll keep you in mind if i dont find one at work! So far the only prob ive noticed is at idle it seems a little lean . However, i a few other problems to sort out that are unrelated to this mod. May run better with the 1.8l ecu. My idle has been surging, have a miss, and A/F guage reads oddly at times. Gonna check temp sensors, ISC, and swap ecu. These started before i did this mod. Question: is there any difference between the Mitsubishi and Hyundai ECU pin outs? |
|
| Author: | Berserko [ Tue Dec 09, 2003 3:50 am ] |
| Post subject: | |
Pin outs for what? the ECU? ISC? Temp sensors? |
|
| Author: | socrateez [ Tue Dec 09, 2003 7:21 am ] |
| Post subject: | |
Sorry.  I meant is there any difference in the wiring leading to the ECU between a Mitsubishi and Hyundai 1.8l wiring. Also i was looking at the Ecu plugs on a 4g15 and they seem to have some different wires in different places than the Mitsubishi 1.8l
|
|
| Author: | Berserko [ Tue Dec 09, 2003 8:24 am ] |
| Post subject: | |
What 1.8 were you looking at? The 4g67 the 4g37? the 4g93? The only one I know fits is the 4g37 out of old talons the 1.8's from Elantras are distributorless definetly won't fit and 4g93s also do not work... 4g37 is our only option... |
|
| Author: | socrateez [ Tue Dec 09, 2003 8:30 am ] |
| Post subject: | |
Thanx Berserko! Thats what i needed to know! I'm going to look around work today for an ecu. |
|
| Author: | Berserko [ Thu Dec 11, 2003 8:26 pm ] |
| Post subject: | |
One thing I didn't think about on the G4CSmotor is the timing belt mount as its not the DOHC cam it may or may not fit i'm sure if it didn't it would be a very minor mod for anyone considering to do it it would have to be thought about at least. I almost want to buy another Colt for Cheap and try this simple swap and see how well it works.... |
|
| Page 2 of 5 | All times are UTC-05:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|