[urq] EFI + MAC-14 maxing ataround 5k RPM

[QSHIPQ at aol.com]

In a message dated 10/24/2007 7:19:55 P.M. Central Daylight Time,  
cody at 5000tq.com writes:

>What you refer to is known usually as 'Hybrid Alpha-N' which was  pioneered 
on the F40 IIRC. MS >can be run in speed desnity mode, MAF  mode, alpha-n mode 
and hybrid alpha-n mode, but most >run speed  density with only a very small 
handfull on either form of alpha-n. Anyways,  yeah Bens >setup is on MAP vs 
RPM with modifiers like air temp, coolant  temp, TPS accel enrichment (like >a 
carburettor accel pump).
 
It appears from below, that this setting is working, but I bet one has to  
become familiar with it using a 272 cam on a turbo audi....  
 
 
>I just looked at a log file where Ben started the engine and slowly  let it 
run up to 5k. Duty cycle >is perfectly fine, never higher then 50%.  From what 
I'm seeing it looks like an ignition missfire. >TPS stays  perfectly still, 
but for one split second the vacuum goes away and  simultaneosly the >O2 reads 
lean, while the MS tried to compensate for it  and bounced the fuel up a bit. 
Everything >in the settings looks good too,  BTW. I call ignition problem, but 
I have no suggestions for why :-(.
 
That makes more sense to me, it sure appears fuel is there.   Ignition:  RPM 
signal falling out - weak signal, worn teeth, bad sensor,  wiring issue...   
Arc: in the wires, distr, and/or rotor.   Bad plug/s.  Incorrect IAT sender.  



>MAP reprogramming is not something most can do, this is assembler  language 
stuff burned on >the CPU and frankly should never need to be  edited.
 
Isn't there a software adjustment for load value, or is that  adjusted for in 
the VE tabling?  There has to be a way to trim the load  values without a 
reburn, since that will vary as MS is installed on  various motors.  Curiousity 
more than something that needs to be done, it  certainly appears fuel isn't the 
focus anyhow.  
 
Scott J



 



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