Originally posted by REDS HOT AIR
HEY JOE: while your here do you have a race chip designed more for higher boost?
i have your chip for 110 with 26 degrees but for some reason my car dont seem to like high boost with it over 24# even with low 800 02's and i verified 26 degrees timing on the scanner and i checked fuel pressure (still getting 1# per# of boost and not dropping any but it seems to pick up knock over 24# even on c16 fuel
combo is in the sig.
im thinking more like 24 degrees of timing is that normal?
on your 20 degree street chip i can go to 26# for short burst on 110 octane but i seem to run out of injector duty at that point.
keep in mind in chip dumb i have no idea what is involved.
thanks...RED
Hi Red,
First let me say that my Street 93 chip for 50# Injectors, does not have 100% Duty Cycle on the injectors, more like 75-80% D.C..
The Chip was designed for lower boost application on 93 octane. That being the case, trying to run high boost will absolutely lean the engine out whether you run 93 or 110 octane period.
Lets put it this way if you run 93 octane, and 16-17 psi with 50# injectors, and you only need say 36-40# of fuel, then running a chip with 75-80% D.C. max. is what is done in the program.
If the Chip was programmed for 100% d.c. and you ran the same boost then the engine would go pig rich, since you can't possibly use 50# of fuel at that boost or power level.
Chips are normally programmed for there intended conditions and use based on engine, turbo, octane etc.
Using them to far out of what was originally intended will normally get you in trouble.
TR owners are notorious for runing their engines, beyond the limits of the intended programming. I have been guilty of this pratice also, lots of broken parts or head gaskets.
A single chip program. is just that no more, no less. The program establishes the fuel & timing. You provide the octane & air (boost) to match what is in the program. If you provide to much or to little of either problems will absolutley occur period.
I'm sure most of the programmers out there will agree that certain cars react differently to a specific program.
A good example would be timing...timing in a chip is commanded timing, your scan tool says that its say 26*, the question is? is it really 26* on that particular engine? I have personnally seen engines +/- 3* on the damper using a timing light. So whats up with that??
The same situation may occur with injector duty cycle, although an injector is commanded by the program to pulse at 80, 90 or 100% d.c. and that is what shows on a scan tool. Is the injector mechanically doing what is commanded?? Not always!
Depending on certain injectors types, some may only actually pulse at say 90% even though commanded to 100% if you get my drift. So don't always believe what your scan tool says, its a great tool, but it does not show you what is mechanically happening just what is commanded to happen.
Every programmer knows the intent of his program, and its limitations. Just try to operate the engine within those agreed parameters and you & your engines life will be much happier.
