MAF's and custom programs
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Joined: Sep 2002
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From: Dyersburg, Tn.
MAF's and custom programs
I have a Ganatelli MAF that I am wanting to run with a supercharger set up. Can a custom programmed chip compensate for the larger MAF or does it have to be recalibrated for the supercharger separately and in the custom progam? It is presently calibrated for a N/A set up.
Former Sponsor
Joined: Mar 1998
Posts: 13,385
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From: Virginia
Hi Big O,
The chip will have to be programmed for both the supercharger *and* that MAF, and the *only* way to do that properly is to take it to a chassis dyno faciilty and have the A/F ratios tested.
Then once you have that data, both the power plots and the A/F test graph, if this is a Superchip, send that data in to us & we can take care of the program changes that will be needed.
I'm sure you already know this of course, but for anyone else reading these posts, *never* attempt to use a Superchip set up for a naturally aspirated motor on a supercharged engine.
The chip will have to be programmed for both the supercharger *and* that MAF, and the *only* way to do that properly is to take it to a chassis dyno faciilty and have the A/F ratios tested.
Then once you have that data, both the power plots and the A/F test graph, if this is a Superchip, send that data in to us & we can take care of the program changes that will be needed.
I'm sure you already know this of course, but for anyone else reading these posts, *never* attempt to use a Superchip set up for a naturally aspirated motor on a supercharged engine.
Former Sponsor
Joined: Mar 1998
Posts: 13,385
Likes: 4
From: Virginia
Hi Big O,
No, that is not what I meant to imply, so if my answer gave you that impression my apologies!
What we want to see is the dyno plots & A/F ratio test graph run in the exact configuration the vehicle is goign to be driven in, that is what we need to tune for, so that would be with the blower *and* with the Granatelli MAF on there, too. It would not do us any good to get thsoe plots for the blower with the stock MAF to tune for the blower and the aftermarket MAF, due to the leanout from the aftermarket MAF causing different A/F's (leaner) than what you'll see with the blower and hte stock MAF.
The issue in this case is just how much did the MAF lean out the A/F, you see, and they do vary a bit.
Sure, we could throw a tune at it and just fatten up the fuel enough to easily be safe with the MAF, we know the Granatelli units pretty well, but when you're in a situation where you need to go to the dyno to get A/F's anyway, like for your blower, then do the dyno testing & A/F's with the new MAF in place as well, so we can see *exactly* what the end result is to the A/F's & correct accordingly.
Give us a call if you'd like to go over this in more detail, just get an overview of it all, etc.
No, that is not what I meant to imply, so if my answer gave you that impression my apologies!
What we want to see is the dyno plots & A/F ratio test graph run in the exact configuration the vehicle is goign to be driven in, that is what we need to tune for, so that would be with the blower *and* with the Granatelli MAF on there, too. It would not do us any good to get thsoe plots for the blower with the stock MAF to tune for the blower and the aftermarket MAF, due to the leanout from the aftermarket MAF causing different A/F's (leaner) than what you'll see with the blower and hte stock MAF.
The issue in this case is just how much did the MAF lean out the A/F, you see, and they do vary a bit.
Sure, we could throw a tune at it and just fatten up the fuel enough to easily be safe with the MAF, we know the Granatelli units pretty well, but when you're in a situation where you need to go to the dyno to get A/F's anyway, like for your blower, then do the dyno testing & A/F's with the new MAF in place as well, so we can see *exactly* what the end result is to the A/F's & correct accordingly.
Give us a call if you'd like to go over this in more detail, just get an overview of it all, etc.