1227165 ecu with custom code much better than stock ecu. (Page 16/26)
chetw77cruiser FEB 01, 06:17 PM
Technically, they both do not have NVRAM stock. The NVRAM is an add-on for the 7165 that goes in place of the memcal.

There is no "downgrade" as far as processor speed. For the physical abilities between the two, the 7730 wins over the 7165. The 7165 is limited on the number of outputs and inputs. I have found that the 7165 has what is needed for most swaps, other than native EGR control with the modified code. This can be dealt with in a fairly simplistic way in the code, though I have not had a chance to try it yet.

Personally, considering that you already have the 7730 in your car, stay with it. You already have it matched to your vehicle and it is something that you know. I, on the other hand, am one who is always trying something different because. . .

Just can't leave well enough alone.

[This message has been edited by chetw77cruiser (edited 02-05-2013).]

sleevePAPA FEB 01, 08:49 PM

quote
Originally posted by chetw77cruiser:

The processor may be similar, but the hardware and porting is different. There already is a NVSRAM board for the 7730 but it is only ported for a modified version of $8D code. The board is available in kit and assembled form from moates.net. The $8D code has a fairly steep learning curve, but once mastered, I believe it is the best code for use in the 7730 in non-boosted applications. It is even compatible with the Fiero EGR system. No adapters needed for a digital EGR module.

Oh, the 7165 was also used in the S series pickup with the 2.5 Duke engine prior to the switch to the 2.2. Availability should not be a problem.




i running my 86 SE 2.8/auto with S_AUJPV4, i highly modified $8D, with pretty good success so far. just need to fine tune a few things but the extended VE table(6400rpm) and spark table is copied and interpolated from $24. AE needs tweaked since im using bosch III 19#ers and havent messed with PE yet since i have yet to install the KS. if you are interested i can send you what i have so far.

chetw77cruiser FEB 01, 09:10 PM
I am very well versed in that particular code. I was using that in my 86GT prior to ventelating the block on the V5 engine. I also used it in a 79 Dodge Omni with 90 VW Golf GTI engine/trans and a Toyota FJ40 Landcruiser EFI conversion. Quite versatile if you know what you are doing.

I am always game to see what others are doing in the tuning world. You could send some datalogs and I could help you with your tuning if you want.
sleevePAPA FEB 01, 09:27 PM

quote
Originally posted by chetw77cruiser:

I am very well versed in that particular code. I was using that in my 86GT prior to ventelating the block on the V5 engine. I also used it in a 79 Dodge Omni with 90 VW Golf GTI engine/trans and a Toyota FJ40 Landcruiser EFI conversion. Quite versatile if you know what you are doing.

I am always game to see what others are doing in the tuning world. You could send some datalogs and I could help you with your tuning if you want.


i figured you would be familiar LOL. if you know your way around the assembly i could use a suggestion or two. ill send you a PM so i dont hijack your thread, stby...
chetw77cruiser FEB 05, 10:06 PM
OK, so I finally have a weekend that I do not have to either go somewhere or get called in due to bad weather. I took this opportunity to install the 7165 into the "NEW" 86 SE v6. I was able to remove the center console, remove the old ecu, re-pin the connecters, and install everything in the reverse order in under an hour. I took it out for a ride using the base tune I made for Four_Hundred_86, nothing else done to the code. With the cold start injector disconnected, the engine started without issue and settled into a nice idle. Idles at a near perfect 900 RPM with no fluctuation. While out dataloging some, I got the urge to "Go Fast", so I went with it. Before traffic forced a landing, I was able to attain 114 indicated via GPS, 109 through datalog. Good to know there is a discrepancy there. I was still accelerating, albeit somewhat slowly.
Prior to the 7165 swap, I was barely able to crack 100 GPS on the same run and weather conditions.

Keep in mind that this was taking place at 8300 Feet. Not bad if I may say so.

Four_Hundred_86, you can keep the car. I have one of my own now.

[This message has been edited by chetw77cruiser (edited 02-05-2013).]

lou_dias FEB 06, 01:35 PM
I find the biggest problem with the Fiero idle is the IAC. I think it tends to over/under compensate. I think I smoothened mine on the '7730/$A1 using a lower step count.
chetw77cruiser FEB 06, 01:57 PM

quote
Originally posted by lou_dias:

I find the biggest problem with the Fiero idle is the IAC. I think it tends to over/under compensate. I think I smoothened mine on the '7730/$A1 using a lower step count.



I agree, using the stock computer. There are ways of tuning the under/over swing, but messing with PID loops can be a headache if not done correctly. A good way to look at the IAC is as a semi-controlled vacuum leak. Repeat after me, Vacuum Leaks Are Bad. I usually keep my iac count at warm idle in the 10 to 20 range with all loads off. The ignition also contributes to the idle characteristics as well. The $A1 code should have idle spark advance compensation, and the $12P code I am using does. Once fueling is correct as well as ignition, the IAC should move very little if at all to keep a smooth idle.
fierosound JUL 25, 11:48 AM
<just a bump>

I am also looking very closely at this swap as an alternative to the 7730 ECM and EBL-P4 ECM (modified 7730) swaps.

I noticed you are obsessed with fuel mileage.

We know the Fiero V6 is "batch fire" on the injectors and that SFI (Sequential Fuel Injection) would be the most efficient but would require lots of rewiring to the engine harness to make it work on a stock V6 engine.

While reading up on this stuff, I came across something where someone changed the code to "bank fire" so each bank of injectors only fires on every other revolution as appropriate for those cylinders on that bank, as opposed to both banks firing on EVERY revolution as the batch fire normally works. Is this something you've looked at?


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[This message has been edited by fierosound (edited 07-25-2013).]

chetw77cruiser JUL 26, 08:00 PM
I am not obsessed with mileage, just so happens I was pushing the envelope while testing. Results were promising but I would not run these settings in a real world application, kind of hard on valves and exhaust manifolds.

The 7165 is batch fire only as well, only one injector driver. The 12P code does have a setting to switch between "single-fire" and "double-fire" modes. The single-fire mode is beneficial in applications with very high flow injectors that are unstable at low injector open times. Instead of delivering the fuel every crank revolution, single fire delivers fuel every other crank rev but doubles the injector open time to deliver the needed fuel. Would work in a boosted application with large injectors and still maintain a decent idle.

[This message has been edited by chetw77cruiser (edited 07-26-2013).]

larry mimbs JUL 27, 06:22 PM
Can you suggest an ecu that is sfi, can be dis, and will control a 4T65E trans?