So I haven't made any stellar progress with how it runs.
Talked to a guy locally who likes Harris Performance, but admits that his chips aren't 100%. So I stopped there.
I have swapped out basically all of the TBI parts with no changes. Did a data-log and sent it to Troy at Howell. He said that everything looked good, and then asked if I had driveability problems...
He apparently forgot the conversation I had with him on the phone.
Anyway, after a couple more emails , he said that I should set base timing to 10-12*.
That made a noticeable difference compared to 0* where I had it. It had started to stumble and sometimes die when I touched the gas pedal to drive away from a rolling corner, or after going to drive from neutral. This started since outside temperatures came down into the upper 40's when I was driving it.
After adjusting the timing, it still stumbles badly in the lower rpm range at part throttle, but it will actually go to WOT now, and pull decently!!!!
Idle vacuum is fairly steady now at 15.5" warm engine.
But still isn't really driveable.
So I have talked with
@Bent77 about this thing, and am having mental problems with what to do. I really want to be able to make changes easier than I can with the 7747 ECM. I am not versed in what to do with Tunerpro to change the tables and emulate, even though I have the capability with hardware. I don't have a larger throttle body, let alone one in good shape. The stock bore one is going to be a limiting factor in the upper rpm range. Upgrading this is going to cost $.
I saw where
@Mastiff converted his ECM by sending it to Dynamic EFI to be able to reflash on the fly. That upgrade alone is $400 plus shipping both ways. This still leaves me with a somewhat slow ECM, but it's less expensive than a new EFI system.
But what all of this rambling is about, is I am having a difficult time NOT seeing a new 4V EFI system being a better long term solution. However, I am still unsure of which one. I am very curious about the Edelbrock Proflo 4. It has sequential injection, and intake air temp sensor. It comes with a distributor to let the ECM control timing. The ECM is remote mounted, which I like. A cheaper system without timing control is a step backwards from my factory configuration.
I don't remember ever getting a bad product from Edelbrock, even considering that their carbs aren't tuned for my elevation.
But there isn't much feedback out there on this system, and I assume mostly because it isn't widely purchased.
I am still curious how Holley treats
@mrk5 with his being out of warranty.
And I am slightly worried about durability of Fitech as well.
So, knowing that I don't have cash in my paw to buy a new system, but I could pay back my savings account, I would like to overoverthink this in case I pull the trigger.
What's your thoughts???
