What will happen if I run without the MAF?
04-08-2010, 12:36 AM
#1
What will happen if I run without the MAF? Question. What would happen if I drove my blown 408 without the MAF for 20 miles to a friends house to get an SD tune. Will it just run rich or do I run the risk of going lean? I dont think running rich would kill a motor but I know running lean will. I havnt got the wideband yet so I dont have a way of monitoring it.
04-08-2010, 12:54 AM
#2
depends what all you have. is this a factory car that you just changed the motor in and added a blower?
we need to know if the pcm is still factory tuned or if it has been changed.
if the motor is a 408 and its got a blower, but the pcm thinks its a factory 346 or whatever it could act weird.
have you started it? drove it at all?
with my limited knowledge and lack of experience. If it will start and run, and driving it doesent seem to awful, 20 miles seems ok, but with that said. How much could it cost to have it towed? If i was strapped for cash, and it ran a little i would drive it, but otherwise just tow it.
I know I'm not much help but wait for some who's done it to help out more.
we need to know if the pcm is still factory tuned or if it has been changed.
if the motor is a 408 and its got a blower, but the pcm thinks its a factory 346 or whatever it could act weird.
have you started it? drove it at all?
with my limited knowledge and lack of experience. If it will start and run, and driving it doesent seem to awful, 20 miles seems ok, but with that said. How much could it cost to have it towed? If i was strapped for cash, and it ran a little i would drive it, but otherwise just tow it.
I know I'm not much help but wait for some who's done it to help out more.
04-08-2010, 08:16 AM
#3
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Question. What would happen if I drove my blown 408 without the MAF for 20 miles to a friends house to get an SD tune. Will it just run rich or do I run the risk of going lean? I dont think running rich would kill a motor but I know running lean will. I havnt got the wideband yet so I dont have a way of monitoring it.
04-08-2010, 08:34 AM
#5
Dont risk it man, its just not worth it. Either go pick up the guy who is gonna tune it or tow it there. Who is tuning it cause I only know of one Tulsa area guy I'd trust doin a SD tune on a boosted car & he doesnt even do it for a living, but has had several turbo LS1 cars and tuned them himself.
Word to the wise, get a damn wideband too. I dont really care what others say about running one, I say if your boosted or using nitrous a wideband is a good investment weather your 100% confident in your tune or not.
You spent way too long on this build to risk it tryin to drive it with a set-up like that & not even a base tune. And the price of a good wideband isnt that bad, check out the PLX widebands, they work with HPtuners too.
Word to the wise, get a damn wideband too. I dont really care what others say about running one, I say if your boosted or using nitrous a wideband is a good investment weather your 100% confident in your tune or not.
You spent way too long on this build to risk it tryin to drive it with a set-up like that & not even a base tune. And the price of a good wideband isnt that bad, check out the PLX widebands, they work with HPtuners too.
04-08-2010, 08:39 AM
#6
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Dont risk it man, its just not worth it. Either go pick up the guy who is gonna tune it or tow it there. Who is tuning it cause I only know of one Tulsa area guy I'd trust doin a SD tune on a boosted car & he doesnt even do it for a living, but has had several turbo LS1 cars and tuned them himself.
Word to the wise, get a damn wideband too. I dont really care what others say about running one, I say if your boosted or using nitrous a wideband is a good investment weather your 100% confident in your tune or not.
You spent way too long on this build to risk it tryin to drive it with a set-up like that & not even a base tune. And the price of a good wideband isnt that bad, check out the PLX widebands, they work with HPtuners too.
Word to the wise, get a damn wideband too. I dont really care what others say about running one, I say if your boosted or using nitrous a wideband is a good investment weather your 100% confident in your tune or not.
You spent way too long on this build to risk it tryin to drive it with a set-up like that & not even a base tune. And the price of a good wideband isnt that bad, check out the PLX widebands, they work with HPtuners too.
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04-09-2010, 12:12 AM
#8
It starts, idles and drives with the MAF. Not sure about without the MAF and supercharger plumbed in. I've got the 3 pillar pod, fuel pressure and boost gauge, havnt got the wideband yet thoughb but yea I will have him come over to tune it. Hopefully he can do an SD tune. I've got tunercats on the car right now. Mike, does your friend work with tunercats and do you think he could do a basic SD tune on my car for a couple 6 packs?
04-09-2010, 06:25 AM
#9
with no MAF, the ecm will go into limp mode, and run stupid rich, and that is just with the stock motor. with a completely different motor, I agree with everybody above. don't risk it. if you're low on cash, just have a buddy hook a tow strap to the car and pull it to the other guy's house.
04-09-2010, 07:34 AM
#10
It starts, idles and drives with the MAF. Not sure about without the MAF and supercharger plumbed in. I've got the 3 pillar pod, fuel pressure and boost gauge, havnt got the wideband yet thoughb but yea I will have him come over to tune it. Hopefully he can do an SD tune. I've got tunercats on the car right now. Mike, does your friend work with tunercats and do you think he could do a basic SD tune on my car for a couple 6 packs?
The best advice I can offer is to do this right man. I know your getting ancy cause its been down forever getting built & I know your on a budget, but you really dont wanna try cutting corners on a build like this.
I suggest you make sure your stock PCM is untouched & find a tuner with HPtuners or EFIlive to tune it with & get a wideband FIRST. I know Brett down at XP in OKC does SD tunes but for a solid SD tune your gonna shell out some cash man. You jumped into the deep end of the pool cost wise once you decided on a 408 w/boost. A solid tune is always gonna be costly.
My buddy local is Wingnut from our old local forum, he can street tune or dyno either one. Word of the wise my friend, unless you know a top notch tuner & are good friends with him your not gonna get a SD tune worth a **** for a couple 6-packs. This tune will take time & have to be dialed in.
I know all this sucks but its gonna be a expensive bullet to bite. This will end one of two ways, get a cheapo tune & see how long the motor last just so you can have it done or save up & drop the coin for a tuner known for doin good SD tunes to do it right. The choice is yours.
04-09-2010, 11:27 PM
#13
There is an LS1 version that can be used with tunercats. He's got the program on my ECM now, disabled a bunch of BS codes, he is able to change alot of the fuel curves and **** with it. I dont know much about tuning but I am really interested in the AEM standalone unit. Done some reading, pretty easy to install and tune yourself. AEM Stand alones are also a hell of alot cheaper than the BS3.
04-10-2010, 09:34 AM
#15
There is an LS1 version that can be used with tunercats. He's got the program on my ECM now, disabled a bunch of BS codes, he is able to change alot of the fuel curves and **** with it. I dont know much about tuning but I am really interested in the AEM standalone unit. Done some reading, pretty easy to install and tune yourself. AEM Stand alones are also a hell of alot cheaper than the BS3.
There are so many guys running around on a stock PCM with a tune done with HPtuner or EFIlive. Im getting the feeling your thinking your way into over complicating your build & tune.
04-12-2010, 03:02 PM
#16
as far as tuning goes especially on a boost car you dont wanna skimp. and yea too rich will kill your car my buddys car has gone down twice because of it. id say check out a reliable tuner like XP Racing or Abel Racing or something of the like and get a proper SD tune done the right way because the last thing you want to happen is this motor go down because of cutting corners.
and yea why cant you drive it there with the MAF if thats your only option and just take it off when your there?
and yea why cant you drive it there with the MAF if thats your only option and just take it off when your there?
04-12-2010, 03:31 PM
#17
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Seeing how the computer use's it to measure the amount of air entering the engine I don't see how it would benifit you at all. The computer would never know and have to run rich to be safe= poor fuel econ.
04-12-2010, 11:33 PM
#19
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tunercat is not a just a lt1 tuning tool, u obveously have no clue about tuneing or tunercat in general... my car was tuned with tunercat and ur sayin its less of a tune because hptuners wasnt used? no. u can dial in ur fuel and timeing and anything else u want just the same as any other tuner
04-13-2010, 07:51 AM
#20
tunercat is not a just a lt1 tuning tool, u obveously have no clue about tuneing or tunercat in general... my car was tuned with tunercat and ur sayin its less of a tune because hptuners wasnt used? no. u can dial in ur fuel and timeing and anything else u want just the same as any other tuner
I'll stick by using HPtuners or EFIlive personally as I know for a fact they work & several widebands out there will also interface with them.