Thanks horizon105. I did do a search, but found nothing explaining what it is. BTW, I take it your an SP? I'm a Tech @ Edwards.horizon1015 said:Lazy people. Simply a Mapclamp "Hides" boost from your PCM. It prevents the PCM from pulling timeing and fuel based on what it thinks is overboost.
Yes you can buy one, But if you install one you need a "Wideband" which is basically a very accurate O2 sensor wired to a gauge so you can tell what your Air Fuel Ratio (AFR) is. Dyno's have widebands normally or you buy one and install it in your car so you can see what your AFR is on the fly.
what he said. And ive got one for sale if you want it, 20 bucks shipped :thumbsup:blackbird_R/T said:Technically it's a zener diode, and if you want to get fancy and make it adjustable you can add a potentiometer (variable resistor). It gets wired into your factory engine wiring harness going to the MAP sensor (which is located on the intake manifold). The MAP sensor is used by the PCM to tell how much boost and subsequently air is going into the engine. Combined with knowing the rpm's and other sensor readings the PCM can determine how much fuel is needed. The MAP clamp then "clamps" or limits the maximum voltage (and boost) that the PCM will see. And if the PCM only sees 15 psi of boost and you've manually turned it up to 17 psi, you'll still only get 15 psi worth of fuel which will lean the air/fuel mixture out.
Check out the "sticky's" at the top of the tuning section. You should be able to find a lot of other information on what it does and how it works. Like a lot of performance parts and modification it has advantages but also some pretty big risks if you're not careful and don't know what it's doing.
First off, he claims he searched, and while it is impossible to prove he did or didn't, I'll give the benefit of the doubt to a veteran. If he doesn't know what a map clamp is, then that gives relative noob status, since every method of fuel control uses some form of map clamping (aside from standalones and staged computers). How are you not being an asshole? You obviously took offense to the statement despite the fact I mentioned no names. So if you weren't being one, why are you replying? Oh right, cause your post was useless. Nice. Still funny though.uncommon said:i'm not being an asshole. all he had to do was search, obviously he didn't. there has got to be a gazillion threads on map clamps.
and also, how is he a noobie? he's been on here since December of 04....? :stab:
assholes? last time i checked that was a name....no?fusion said: