Ya know, I always have to be in the lead, but the weird part is, is that there's always another car to catch up to... hmm... .
Anyway, is there anything I can do about the stall speed on the convertor? It seems like when I hit the accelerator, the motor will wind up real nice and fast, and from there on out, its just a game of getting the transmission to catch up to the rpms my motor is at.
Heres my issue though, beyond the MPG, my egts are high enough to possibly vaporize my turbo (that's never happened... ... ) and that is not ok with me either.
I guess what I'm asking is this:
(I hope you packed a lunch... )
When you turn the screw in, your pump gains the ability to push more fuel through, simple enough. But I would venture to guess that it's not exactly a direct ratio. In otherwords, if you turn the screw in twice as far as someone with all the rest of the same set up, that doesn't neccessarily mean you gained twice as much fueling as said person. So assuming our standard unit of measure would be that the amount of fuel you gain from one turn (360 degrees) on the screw is equal to 1F. If you turn the screw 2 times, I wouldnt neccessarily say that its 2F... at least I wouldn't think so. And say you turn it half a turn (180) that wouldn't technically mean your gain was equal to . 5F. So where this comes into play, is lets say you turn it in some ridiculous number... 20 turns... which Im not sure is possible (Im also not sure how far mine is, for the record). If I'm right in my line of thought, that doesn't neccesarily make the fuel gain equal to 20F, does it? Further, I would also imagine that the number would actually slow in its rate of increase. Lets say, for example, at one turn, we're at 1f. Five turns then, is maybe equal to 3F. So by the time we're at 20 turns, your fueling gain is only equal to 10F. At some point, it would take 5 or more turns just to gain another 1F, and eventually the negative consequences (e. g. high idle) begin to negate the tiny amount of gain from just one more turn. Eventually you're just peeing up a rope, put the screwdriver down and back away from the vehicle.
More so how does this then translate into horsepower. Back to the 1F. If we take the amount of fuel gain as represented by the variable 1F, and say that the horsepower gain off of 1F is equal to 1P. I would once again venture to guess that 2F does not neccessarily mean a horsepower gain of 2P, all other variables kept constant. I would once again venture to guess that the rate of increase slows as you up the fueling. So for example on this, lets say that 1F equals 1P, 3F equals 2P, and 10F equals 7P.
Anyone still paying attention?
Now to really make it fun, lets say that EGT increase and MPG decrease is, in this scenerio, controlled by fueling increase. MPG loss I would guess to be pretty close to a set rate inverse of fueling increase (duh). EGTs I would guess to somewhat taper off, but never really slow to the point of... peeing up a rope. 1F is equal to an EGT increase of 1E and a MPG decrease of 1M. 5F, we'll say is equal to an increase in EGT of 4E and an MPG decrease of 5M.
Do you see where this is going?
If my theory has any bit of truth to it, eventually, you reach a point where turning the screw in stops doing anything. More so, there's got to be a point where the actual amout of fuel added stops gaining horsepower, but keeps raising the EGTs.
Lets apply this to my current numbers, and maybe my ramblings will somehow start to make sense.
The only numbers I know for sure are my EGTs are at roughly 1500 (at least) if you hold WOT to get up to freeway speeds. My idle is at 1100, roughly. We'll make stuff up for the numbers I don't know. Lets pick a conservative number and say my horsepower is at 220, and my fuel economy is at 15. Now if I back the fuel screw out far enough to lower my EGTs to 1300, how will that translate across the map? Maybe it wont have too much of an effect. Say, 210hp, 16mpg, 1000rpm at idle. The again, it could have a bigger impact: 190hp, 17mpg, 900rpm idle.
This may have been long, and drawn out, and wasted everyones time, but I'm on the quest for knowledge here, and any intelligent input would be greatly appreciated.
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