[Gmecm] Soliciting Advice

[Mark Romans]

128/108 = 1.18 so leave your fuel pressure alone and mulitply the numbers 
for fuel I gave you previously by the 1.18  In tunercat click at the top of 
the list and go to the blue asterisk and type in 1.18 and this will adjust 
your fuel constant by the amount you wish to reduce teh flow, you are 
telling the ecm that the injectors are 18% bigger.  If your block learn goes 
about 128 then reduce the numbers.

534
1068
1602
2213
2670
3281
3815
4349
4883
5493
5951
6561
7095
7553
8163
8698


----- Original Message ----- 
From: "Mike Poore" <mp at FlowersByValerie.com>
To: <gmecm at diy-efi.org>
Sent: Wednesday, March 08, 2006 5:13 PM
Subject: [Gmecm] Soliciting Advice


> Now that my heated O2 sensor is allowing me to collect closed loop data, I 
> am trying to figure out what changes I should make.
>
> I am working on a heavily modified L98 engine with the 1226870 ecm using a 
> MAF. The injectors are too big, but I need to make use of them because of 
> my budget.
>
> Here are the data I collected at 1000 rpm:
>
> BLM: 108
> Integrator: 122-128
> Inj. PW: .9ms
> IAC: 58
> Fuel Pressure: 35#
> O2 Transitions are rapid and numerous
>
> The BLM is at the bottom range, so I guess I need to lean it out. I am 
> worried about lowering the fuel pressure and preventing good atomization. 
> It seems that the injector pulse width can't be much lower.
>
> When I link with Diacom, or any scanner for that matter, the engine goes 
> into a mode where the spark is advanced and the idle is increased. Can 
> this ecm be configured so that it operates the same when linked as it does 
> when not linked?
>
> How low can I go on the Ford fuel injectors and still get them to spray?
>
> What's a normal injector pw at idle and what can I get away with?
>
> With this heated O2 sensor, whats a safe warm-up delay before closed loop?
>
> In addition to the above questions, I am throwing this out there for any 
> advice.
>
> Mike
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