Printable View
14:1 on avg is the Stoich and anything less as in 12:1 is rich (less air, same fuel) compared to 16:1 (more air same fuel). The mass of air is greater when the a/f ratio is 16:1 which makes the mixutre leaner and the mass of air is smaller when the ratio is 12:1 so what riced_roach said was right. I would have mine running a lil leaner with adv timing for better response, not to mention all carbs tend to lean out.Quote:
Originally Posted by LX-i BOY
I just changed my map sensor to a 4g map sensor today too. Like shepherd I've also noticed a gain in the 2-3K rpm range and maybe a bit more power in the above 5K rpm range but I'm not quite sure about that one. Only engine mods are short ram with Green Filter and Champion spark plug wires.
you could probly make a kit with the 4G map and adapters and sell, i would buy one just because im to lazy to go get shyte myself
can someone post pics on how to do this mod please?
what kind pictured do you need?
it is very simple.
you get the 4G map sensor, get the 3G plug (from map sensor), connect the wires between the plug and the sensor.
plug it in and run the vacuum line from the sensor to the stock place on intake manifold.
alex, does the 4th gen prelude have its Map sensor outisde? im thinking of using that if i can. Can i use the Map sensor from a 4th gen accord DX or is it a different part number for the LX and EX? EX might be different right?
If you want pics look in my throttle body thread in project central that is where I first mentioned it and posted it.
i don't know about the prelude. if you don't see any box that has vacuum lines comming out of it, it must be outside than.
4G should have 2 diff sensors, one that will end with 1770 and the other 1771. i tested both of them and they are no diff.
i did pick up a second get teg MAP sensor. i am gonna try run that and see if there is any diff.
Quote:
Originally Posted by smufguy
later model hondas have the map sensor directly bolted to the top of the throttle body.
all of you guys are getting excited over map sensor swaps. Well if you dyno it first then show us the dyno report. I know alot of guys that buy mod chips (not MAP but similar idea) for domestics to imports and they all have different results. A friend of mine bought an expensive "custom" programed chip and after going on the dyno he lost hp. He had to get the EEPROM burnt again to get maximum performance.
My point is blindly putting on a MAP sensor isn't gonna make a huge improvement and also it will have different fuel curves as the original one. I say dyno the car first then proceed in telling others to do so based on facts and NOT seat of your pants testing.
well, if you are so opinionated, why don't you get one and test it for us. Some peple don't have dyno around them.
I know that the closest dyno around here is about 40-50 minutes away.
riced_roach, alex and corey were not saying it just for fun. Besides, i know i can rely on their words cause i have been here long enough to have that opinion. Besides, this thing can be got from the junkyard for like 5 bux, so its not really a big deal to get all excited about man.
buying chip alone is not gonna do stuff to your car, and this is if you get it from a 'no-name' brand, but its tested that on BMWs for example, ACShnitzer chips do work. So u cant say chips dont work either. It all depends on who u get it from. Besides, your friend, i dont know what he was driving, but if it was an import, a piggyback always works.
cutting my lecture short, a dyno chart does not always needed to be provided to prove something like this. Heck, even sean does not have a damn Dyno Sheet on his website, but ppl are buying from him arent they?
Beside it's not really a expensive mod so even if it dosen't work the way you want it to, it's not like it is a big loss or anything.
Damn I wish it was like 5 bucks I got raped for 45Quote:
Originally Posted by smufguy
it burned hole for me. $10 for each sensor. plus i had to get the plugs.
I'm not being opinionated. I'm merely trying to put some input on how doing mods may not reap the benefits you are seeking. I fully understand the theory behind all components on an engine. When an engineer designs the fuel curve of a map sensor based on vacuum signals, displacement of combustion chamber and fuel injectors etc etc they are taking account that the car is used for daily driving purposes, fuel economy and exhaust emissions. Blindly adding a Map sensor to a different engine is NOT an educated or calculated method of producing HP. I've been there and done alot of SHIAT in my time and I've seen alot of "interesting" stuff in my time. By adding a different map sensor MAY or MAY NOT improve performance. This is the sole reason for me to say DYNO it.
I do not disagree that a chip can improve HP. Oh SMUFGUY it was a 347 stroker (stroked 302ci)in a 92 5.0 mustang. This chip was suppose to improve HP but it went backwards. Actually the original chip was installed in the EEC IV computer and the HP went up dramatically. BUT seat of your pants testing didn't indicate a loss in HP but I bet a 1/4 mile time would of indicated it by the MPH of the timeslip.
My point to people who seek info from forums such as this. READ BETWEEN THE LINES and do research and more research. Also please note that modifications to the engine will also effect this "MAP Sensor SWAP" so some may see a difference and some may not. Believe the hype or have faith in a swap. Proof can also be provided by a increase or decrease of MPH in the 1/4 mile. But please note WOT (wide open throttle) is just getting a small part of the fuel curve when doing the 1/4 mile. You may find that at specific rpm you will loose HP compared to using a stock MAP sensor.
BUT dont believe me 'cause I dont know what I'm talking about and I am simply opinionated.
$10 is not that bad, but $45 you got butt raped dude. the guy said he would give it to me for 5 bux and i can come and get it anytime i want. ;)
How do those wires match up? I looked at a 4g map and it had pink, turqouis, and white. The 3g has pink w/white stripe, blue w/white stripe, and white w/blue stripe.
Quote:
Originally Posted by smufguy
Yea the least he could have done is given me some KY with the anal reaming
as for the wire colors check after the plug on the 4th gen harness the colors should match up
it is easy to connect. white to white, blue to blue, and red to red.
arent the 4th gen and 5th gen sensors the same?
Are the wire colors the same for both the 3g and 4g sensors?
they are almost correct. but they have the same layout. you can't screw this up trust me. if you still have questions, PM or IM me.
I also have a kit for salee in the market place
they wires are exactly the same except for just one i guess.
