4g61t.org

With virtually no experience, I am playing the tunner game with the rest of you. I do understand that the basic manuever is to get more air so that more fuel can be mixed for a bigger bang. I have read quite a bit about the most basic mod. in this area as "hacking" the MAF. I thought mine had been done on my 4g61(at least I paid for it). However, since I am putting in 4g63 bolt on's, I got a 63MAF. I had seen many pictures, and read about hacking the MAF. So when I actually took the MAF off myself, I was surprised to see that they are different. The 61 has two cylinders completely separated over a rectangular bottom. On the 63, the rectangular bottom appears to be a little larger, and above it is an ovalized structure like a race track with two curved ends and parallel straights. Just like the pictures. So, I assume that all those illustrations were of 63MAF's and not 61MAF's. Does this surprise anyone else?

OK, so I am now hacking my 63MAF to go on my 61. Well, that change alone will permit more air. But about hacking: I removed the oval screen, which doesn't seem like a great advantage, but I rely on the words of others. I dug out the wax on top, revealing a screw which protruded into the air flow. So, I dutifully removed the screw. More air space.

But why stop there? The ovalized air flow chamber is separated into two compartments by a vertical wall about 1/4" thick (plus another small section at the top). Why not remove all obstructions within the oval space?? Am I missing something here, because I have never read about cutting out the insides. This could easily be done by inserting a hacksaw blade in the chamber, attaching the saw handle, and cuttung away. A file would take care of the rough edges.

If I am off-base, someone please tell me. I am planning on trying this. Bill Spruill, oldest Colt, not the smartest

Well, now I'm embarassed. I found the answer at http://www.roadraceengineering.com/inst ... acking.htm . The last section suggests a complete hollow out IF you have some form of fuel control. OK., I intend to put on a fuel control after I get this thing going, but I do not have one at this moment. So, to change the above question, May I hack the whole thing out now, or must I wait and remove it for a full hack after the fuel control is installed? Oh by the way, it still does not show the difference between a 61MAF and a 63MAF,which is also a bit longer. Bill Spruill, oldest Colt

From what I know you have to wait till you get an AFC or some sort of fuel control in order to perform the full hack. The advantage of the 63 MAS over the 61 MAS is a higher stock fuel cut.

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Jason Veraldi
Scammer
http://www.4g61t.org/forum/viewtopic.php?f=3&t=34532

why not jsut install a Gm maf translator? no need to hack anything at all.
and no fuel cut either, and no need for an afc

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If speed kills, then i shoulda been dead awhile ago. There is no such thing as "Too Much Power". There is no excuse for a lost race. Do you view the rev limiter as a fun limiter?or as a shift point? And we all know, more boost=more fun.