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My sbc engine is 355 ci, 9.5 cr, melling MTC-1 278/288 .421/.444, 193 heads, stock tbi intake/throttle body, headers w 2 1/2" dual exhaust with 700r4. Going in 69 Camaro to be my daily driver(hopefully torquey). I will start with 7747 AMUR ecm with a chip swap and harness from 1988 gmc van. I think I will be around 330 hp. Questions:
# 1-I calculated fuel needs, what about using 80/90 lb/hr injectors around 18-20 psi?
#2-What about initial startup with AMUR data in ecm? Possible tweaks?
#3-Is WB O2 necessary for tuning?
I am sure there will be more to follow.
Thanks in advance, Steve
Sounds like your on the right track 300hp would be close to 90#hrs and increasing fp to 18 should support 350hp.
You can incorporate a wb signal with moates apu1. Tuning everything expect wot can be easily done with the Nb o2. Video recording wot with the tach showing makes it easier to tune wot. I find it alittle difficult to watch the wb toggle so I make changes to the higher kpa areas uniformly.
Thanks for the reply. I am getting the hardware side of the build/swap now. The tuning side will come at startup(new car/engine build) I know very little about tuning, I am sure there will be plenty of questions. I was hoping I could start the engine with the 7747 AMUR files that ran the 350ci GMC van. I will have the chip replaced and AMUR files loaded in it.
I am reading that I should use Lambda not AFR for tuning. Who has the most reliable package? I am working on dash and would like to incorporate gauge. And do I need it to log or just get help when I am tuning WOT? Steve
Lambda is scale that relates the air to fuel ratio of ANY fuel.
Innovative and aem make great equipments, just make sure you do a air adjustment before use.
Datalogging will help making fueling adjustments. You might consider using moates.net g2
So you can use a flash chip instead of a 2732. http://www.moates.net/g2-memory-adap....html?cPath=64
So if I use afr then I just have to realize there is a 10% difference for the ethanol, am I thinking right? Some time ago I had bought 2-S2 28 pin zif sockets, 2-C2SST 27SF512 chips, ALDL CABL1 and burn 2 chip programmer. Will this not work for me? Steve
10% ethanol with gasoline stoic would be about 14.04:1 .
I would just tune until the wb is around 12.5:1 . The ecm is trying to target 14.7:1 actually is looking for 450-500mv . there is a target af ratio in the programming but since the nb doesn't have much range you can just adjust your ve to a achieve your target afr. The int/Should end up being 130-132 .
I dint see that you had purchased anything to adapt a 24 pin to 28pin prom.
The zif will be good for tuning but not a good idea for long term use.
On another note if your using stock manifolds f body have the same angle as first gen. You can use the stock bung with a ingested 1 wire o2. If your using headers or downstream o2 you should use a delco afs-74 heated o2.
Last edited by Tuned Performance; 12-10-2016 at 03:09 PM.
I bought those parts a couple years ago when I knew even less than I know now I am guessing the chip can work loose in the zif socket? I am going to run shorty headers coated inside and out, will I need a heated o2 with them?
Zif sockets can have connection issues over time. with headers I'd run a heated o2 unless there is a bung at the collected on shorties. A 3 wire has a signal, ground and ac power wire.
The acc power can go to the fp relay power to the pump or the esc has a acc power.
12-07-2016, 07:44 AM
I am guessing the chip can work loose in the zif socket? I am going to run shorty headers coated inside and out, will I need a heated o2 with them?