On the granatelli web page it says that the ford mass air sensors have the capability to compensate for fuel injector changes. Suposedly this is only offered by granatelli ford sensors? Anyone herd of this? Can I use 24#injectors with my 19# MAF?
MAF question
- Thread starter 87gtguy
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Black Sun 5.0
Founding Member
I never heard of this, but what do I know? From what I've understood, the mass air sensor has to be calibrated for the specific size injector being used. C&L does this with different sized tubes in their MAF, Pro M's are calibrated at the factory. No point in debating which method is better. As for the Ford sensors calibrating themselves, I can't see how this could happen automatically without some kind electonic changes, programming and whatnot.
I agree with Black Sun 5.0. The MAF and injectors must match, or you have to have an additional device between the MAF & computer to make them match.
Pro-M has a box that supposedly allows you to mis-match injectors and MAFs, but I haven't heard from anyone who has one.
Pro-M has a box that supposedly allows you to mis-match injectors and MAFs, but I haven't heard from anyone who has one.
Yeah it sounds weired but if you look at the granatelli web page it says they do? Just wondering if anyone else has ever hear of it or used a 19# calibrated maf with 24# injectors
Black Sun 5.0
Founding Member
KcMstang
Founding Member
I've been doing a lot of searching on this topic since my car has 24# injectors and is suffering from spuddering when I try to give it some gas. I've come to the conclusion that my MAF may not be calibrated for the bigger injectors. So I'm thinking about ordering the C&L unit which is calibrated for the 24# injectors in hopes that will solve my problem.
http://www.latemodelrestoration.com/iwwida.pvx?;item?item_no=CL-119A 1&comp=LRS
http://www.latemodelrestoration.com/iwwida.pvx?;item?item_no=CL-119A 1&comp=LRS
KcMstang
Founding Member
Dr. Wu 2000
New Member
I know Granatelli has matched MAF's for the different size injectors, just purchase the one cal'd to 24# injectors. I have the Granatelli 24# MAF on mine.
KcMstang
Founding Member
So how can you find out if your MAF is NOT calibrated to the injector size? I bought the car with the mods in my sig and noticed a spudder at highway speeds! Trying to get that fixed this weekend! Thanks for all the help!
WELL........IF YOU HAVE STOCK INJECTORS THEN BORROW A FRIENDS SENSOR AND PUT IT ON YOUR CAR AND SEE WHAT HAPPENS. IF IT RUNS FINE AFTER THE SWAP, THEN THAT MEANS YOU HAD THE WRONG SENSOR. EITHER WAY YOU WOULD KNOW IF THE CALIBRATION IS WRONG BECAUSE YOUR CAR WOULD RUN LIKE ****, NOT ONLY ON THE FREEWAY, BUT ANYTIME!
87gtguy said:
I would be interested in seeing the exact verbage Granatelli uses.
Can you post a link?
A Ford MAS is what it is. It will be for a very specific combination of computer and MAF tube.
The only way to make a Ford MAS 'adjustable' to different injectors is to electronically recalibrate its output.
This is the only thing that makes sense to me, given what you have described.
A stock Ford MAF/MAS is calibrated to the computer, not injector size.
Only aftermarket MAF/MAS setups are calibrated to injector/computer combinations.
jason
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