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Running on a Basemap?

 
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Old 08-03-2014, 07:36 PM
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Running on a Basemap?

Hey guys, I'm running a chipped p28 on my bluetop in my 5th gen. I only have a basemap and I'm getting 18 mpg. Before swap, I was getting 26. The ecu is from Phearable.net. I know I really need a tune and that I'm running super rich. I'm posting because I want to know if it's safe to run on the basemap for at least a few months? Also, I need to get a catback exhaust eventually because right now I have a header and test pipe going into stock exhaust. Would it make much difference if I put the exhaust on after the tune, versus before? I would want to get the tune sooner because my mileage is so bad. I have an intake and header currently.
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Old 08-03-2014, 10:22 PM
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Re: Running on a Basemap?

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Hey guys, I'm running a chipped p28 on my bluetop in my 5th gen. I only have a basemap and I'm getting 18 mpg. Before swap, I was getting 26. The ecu is from Phearable.net. I know I really need a tune and that I'm running super rich. I'm posting because I want to know if it's safe to run on the basemap for at least a few months? Also, I need to get a catback exhaust eventually because right now I have a header and test pipe going into stock exhaust. Would it make much difference if I put the exhaust on after the tune, versus before? I would want to get the tune sooner because my mileage is so bad. I have an intake and header currently.
I would not recommend driving on the basemap for any extended amount of time, definitely not for a few months. Just seems like a good way to ruin spark plugs, 02 sensors, catalytic converters, and god know what else. Not to mention wasting a metric ****-ton of fuel. As far as getting a tune, it would make more sense to finish your exhaust setup, and THEN get the tune.
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Old 08-03-2014, 11:00 PM
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Re: Running on a Basemap?

Buy a wideband to monitor your A/F. The recommend is usually high 13's low 14s at idle/cruise and it's normal to see low 13's at WOT. If you within that range you'll be fine. But you're obviously running super rich so I wouldn't drive it like that for months, you'll wash out your cylinders. When I got my chipped P28 in the mail I hooked it up to make sure it was working fine and the basemap from Phearable was crazy rich, low 13 mid 12 afr's. Usually basemaps are tuned like that to avoid being lean which causes more damage than running rich.
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Old 08-04-2014, 06:37 AM
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Re: Running on a Basemap?

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Originally Posted by 01PreludeBlue View Post
Buy a wideband to monitor your A/F. The recommend is usually high 13's low 14s at idle/cruise and it's normal to see low 13's at WOT. If you within that range you'll be fine. But you're obviously running super rich so I wouldn't drive it like that for months, you'll wash out your cylinders. When I got my chipped P28 in the mail I hooked it up to make sure it was working fine and the basemap from Phearable was crazy rich, low 13 mid 12 afr's. Usually basemaps are tuned like that to avoid being lean which causes more damage than running rich.
So the wideband will allow me to adjust this? Or just let me monitor it for when I get tuned
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Old 08-04-2014, 09:33 AM
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Re: Running on a Basemap?

a basemap is not designed to run the engine perfectly. its designed to start it to get to the tuner. thats it.

a tuner will put the fueling where the engine likes it. some will run smoother than others at different AFR's but generally, 14-15 is good for idle and cruise (my turbo car idles smoothest at 13.5:1), 13-14 for light acceleration and cruising, 12-13 for all motor WOT fueling.

low 13s, 12s is also not necessarily considered "crazy rich". its crazy rich when there is black smoke coming out of the exhaust, you are at 10:1 AFR and the engine will hardly idle due to the engine drowning in fuel.

A wideband is like a O2 sensor. it reads the fuel vs oxygen content and turns it into a signal that can be understood numerically. it does not adjust anything. that is the tuners job.
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Old 08-04-2014, 08:02 PM
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Re: Running on a Basemap?

Thanks for the replies guys. So if I buy a wideband o2 and downloaded the Crome software, would this be something I could DIY? What else would I need? I'm doing loads of research at the moment and it's a still a little confusing to me. It's either that or take it to a tuner for a dyno tune. Tuner in my area wants $400.
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Old 08-04-2014, 08:20 PM
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Re: Running on a Basemap?

you get what you pay for.
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Old 08-04-2014, 09:07 PM
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Re: Running on a Basemap?

Just pay the tuner. Tuning isn't something you're going to learn how to do overnight.
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Old 08-04-2014, 09:43 PM
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Re: Running on a Basemap?

$400 is a steal.















ESPECIALLY compared to a >$3,000 engine rebuild from melting a piston cuz you ran too lean due to you wanting to save $400.


Tuning is one of those things where if you need to ask how to do it..... you prolly shouldn't do it.
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Old 08-04-2014, 10:07 PM
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Re: Running on a Basemap?

If you really want to learn how to do it, get tuned and keep that tune as a backup so you always have something you can rely on to run the car in the event you really suck at tuning lol.

I would also advise not learning how to tune on Crome because not everything works as it's really intended to.
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Old 08-05-2014, 08:36 AM
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Re: Running on a Basemap?

Thanks guys. I'm gonna get this exhaust bolted on then headed to the tuner ASAP.
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Old 08-05-2014, 09:10 AM
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Re: Running on a Basemap?

Sounds like you are getting close to...
TEST DRIVE!!
WOOHOO!!
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