Anyone ever installed a MAP enhancer?

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Usually you see products like this being sold for hundreds of dollars.

Here you see that they can be made at home with a couple dollars worth of parts.

They are still not a good idea, but I guess it's better to waste a couple dollars than a couple hundred. Unless it alters your engine operating parameters so much that it causes permanent damage...
 
I have to imagine the o2 sensor would overrule this gizmo, unless you disabled that too. The gizmo might work for a tank of gas until the block learn tables "remember" the discrepancy in sensors and make up for it.

Was reading about how late 80s thru early 90s GM stuff with PROM based OBD-I computers have an open loop "highway mode" with 16:1 lean burn AFR. The EPA made them take it out, as it engaged at a speed slightly above certification (56 MPH?
lol.gif
) and creates too much NOx.

However PROM readers/rewriters/hackers can find the code in there and reenable it.
 
Originally Posted By: eljefino

Was reading about how late 80s thru early 90s GM stuff with PROM based OBD-I computers have an open loop "highway mode" with 16:1 lean burn AFR. The EPA made them take it out, as it engaged at a speed slightly above certification (56 MPH?
lol.gif
) and creates too much NOx.

However PROM readers/rewriters/hackers can find the code in there and reenable it.


In other countries, Honda had a Civic with a similar mode. Not in the US though!
 
The MAP Enhancers I've seen have an o2 sensor lead that basically mimics what the rear (OBD II) o2 sensors do, which is send a voltage signal of 0 to 1 volt several hundred times a minute.
 
with only 2 (or only 1) potentiometers to do the trick? If that is so good to be true, why didn't major auto manufacturers think of that (and included that into their automobile package)?

That's the logic I've been trying hard to implant into ordinary joe's mind, and it's been very difficult to do so...

logics logics where are you? Where on earth are you when I needed you most...

Q.
 
This is for the same type of people that put a resistor in their coolant or air temp lead to trick the ECM into thinking it is cold so they get MAD POWAAZZZZZZZZZ because the car runs rich!

Oh wait... It just makes the car run rich. And makes the backs of their cars black. But it's COOL YO!!!!!!
 
Originally Posted By: SteveSRT8
it was about TIMING


Same reason I added a piece of hose to the intake plumbing on my new Ford Ranger. I gained back 4 mpg, hoping for 32mpg average tomorrow.
 
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Originally Posted By: Quest
If that is so good to be true, why didn't major auto manufacturers think of that (and included that into their automobile package)?

That's the logic I've been trying hard to implant into ordinary joe's mind, and it's been very difficult to do so...


Exactly. Same thing goes for the Vortex intake thing and those junky Pulstar spark plug gimmicks. With automakers trying to pinch for every MPG and HP - they would be using these items if they worked.
 
Originally Posted By: GMBoy
With automakers trying to pinch for every MPG and HP - they would be using these items if they worked.
If the HP claim were true, they'd have better designed factory exhaust systems and mufflers, and the aftermarket would be DOA or SOL.
 
Originally Posted By: dwcopple
If the HP claim were true, they'd have better designed factory exhaust systems and mufflers, and the aftermarket would be DOA or SOL.


IMHO aftermarket designed mufflers and exhausts and all other so-called "bolt-on" device serve a different group of audiences out in this free market, and depending on which group of audiences (remember: they are the customers for these gadgets afterall) they are targeting, aftermarket mufflers and bolt-on exhausts will only take on 1 of the 2 outcomes: (a )provide a high performance exhaust that serves a specific (and oftentimes very narrow)RPM band with peak HP but compromised the other useable RPM range; or (b ) no perceiveable benefits at all and only makes noise/sound which is also a valid form of pollution.

Truth is: when it comes to the subject of exhaust and mufflers, etc. from the original engine designer's perspective: it's all about compromise: balanced between low noise/high comfort level, engine longevity and/or covering wider usable RPM range, with peak power output to be tuned to a specific RPM and frequency (Helmholtz resonance); or sometimes with dual resonance point. and so on and so forth. Also: deviating from the original engine's design criteria typically ended up with suboptimal power output and/or lowered in longevity and service life.


(* this subject can become very advanced and involving...*)

Fact of the matter is: too many so-called "aftermarket bolt-on" compromised on 1 or maybe more of these original goals set by engine designers to extract certain characteristics to please the customers out there, but at the expense of others.

I'll stop here from getting to far into this subject matter.

Q.
 
Originally Posted By: Quest
Originally Posted By: dwcopple
If the HP claim were true, they'd have better designed factory exhaust systems and mufflers, and the aftermarket would be DOA or SOL.


IMHO aftermarket designed mufflers and exhausts and all other so-called "bolt-on" device serve a different group of audiences out in this free market, and depending on which group of audiences (remember: they are the customers for these gadgets afterall) they are targeting, aftermarket mufflers and bolt-on exhausts will only take on 1 of the 2 outcomes: (a )provide a high performance exhaust that serves a specific (and oftentimes very narrow)RPM band with peak HP but compromised the other useable RPM range; or (b ) no perceiveable benefits at all and only makes noise/sound which is also a valid form of pollution.

Truth is: when it comes to the subject of exhaust and mufflers, etc. from the original engine designer's perspective: it's all about compromise: balanced between low noise/high comfort level, engine longevity and/or covering wider usable RPM range, with peak power output to be tuned to a specific RPM and frequency (Helmholtz resonance); or sometimes with dual resonance point. and so on and so forth. Also: deviating from the original engine's design criteria typically ended up with suboptimal power output and/or lowered in longevity and service life.


(* this subject can become very advanced and involving...*)

Fact of the matter is: too many so-called "aftermarket bolt-on" compromised on 1 or maybe more of these original goals set by engine designers to extract certain characteristics to please the customers out there, but at the expense of others.

I'll stop here from getting to far into this subject matter.

Q.



Perfect response. I was going to reply to dwcopple, but you beat me to it. OEM's do an excellent job in comprimising when designing items such as exhaust to meet regulations, durability, power, mpgm etc. The aftermarket does not have to meet all these criteria.
 
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The key word is compromise.

They also have to answer to the bean counters.

That is why there will always be some great opportunities in the aftermarket.
 
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