Honestly....until i learn how to tune an AEM Im gonna go for the ECU plus...I just do NOT like the looks of a blow through MAF....


ANyone know if ECU+ will be updated to handle a SPeed Density COnversion?

 

Has the capability but will probably not be implemented, there is no reason too and i asked the same question. A blow through 3" or 3.5" maf would be much better. Speed density guesses the amount of air going through, a maf on the other hand measures, so it's very precise, and with a blow through setup, the bottleneck is very minimal.

 

I disagree. A map (speed density) will be superior at WOT af far as HP and tuning is concerned. Speed density basicly operates from a mathmatical equasion to determine airflow. Blow through poses problems because the pressurized air is just too turbulant to be measured accurately by a MAS that was not designed for that type of air measurment, not to mention being able to tune by the actual load on the engine. That means your tune will be more the same in every gear.

 

I also dont like the fact that there are yet another set of clamps and weak spots introduced to a pressure side of the system. I want speed density...and I thought I could have had it without a standalone, but it looks like Im back to the standalone idea again.

 

You may want to look into the MAFTpro or MAPecu or whatever its called. They both have alot of great features.

 

yea mapecu seems to be an hks vpc with a built in safc and injector multiplier

 

Speed density uses air temperature, pressure, and volumetric efficiency. My tests with MAP sensors has shown that they're not as accurate or consistent as you'd like, and VE is really just your favorite close-enough number. So would you agree that this makes the SD calculation inherently less accurate than the MAS measurement?

Interesting thought. I don't see why the air pressure would make a difference to the MAS - it just measures flow. About the turbulence - do you have any other sources for this?

I disagree. The required fuel is a function of the air flow and engine's VE at a given RPM and load. Unless you know the exact VE across all of the engine's load points (and you don't, and they change when you add mods), you're gonna be off in a inconsistent manner depending upon where you are in the VE table. So SD is inherently a lot harder to tune, because you have to make up a wide range of numbers, and if you make an error in one cell, all of the other cells have to be wrong in the same way or your tuning will vary all over the map as your engine moves around the VE table.

Tom

 

All extremely valid points. However, I just dont like the setup of the MAF. The blowthroughs Ive found are pricey, and to be honest, when I look at the setup, especialy with the larger units, it seems very "rigged" and hap-hazard. It does not look like it belongs and I like removing segments of i/c piping and using LESS clamps....just my KISS philosiphy. My opinion it is, whether Im totally right...well, I know Im not but thats what I prefer

 

What don't you like about the MAF? You can make plenty of power with it and it doesn't get any simpler than what the factory produced. Until you make the jump to a full standalone (and all the headaches that go with it) or 500+whp there's no need for a speed density conversion IMO, unless you just gotta have something different or can't stand not tweaking the car.

I'm not debating which is better, but if it ain't broke....

 

992, great thoughts. I just like the simplicity of not having the blowthrough. I just see it as more work to convert 2.5" or 3" pipe to a 3" or 3.5" MAF than to use a speed density.

 

which gm mafs (serial or product or part number, or which gm car model they com off of) are supported by ecu+