M1 SP vs Air Gap

Your welcome. Based on the articles, the use of a MP-M1 single is probably not what most people want to use on there street car. I would tend to agree. The fact of the matter is the RPM-AG is such an excellent intake and even more so on heavy cars is shown on the dyno graph to produce more low end torque to help get you moving out of the hole quicker has shown itself apparent via many members here already.

Ive been asked the question regarding when is the switch a good move and that is a hard line to draw. Another member in another thread found the RPM-AG to be faster than the M1 with cleaned up but otherwise stock Edelbrock heads and a cam with a 260 @050 intake duration.

While I believe him, his combo is the odd one out of what I normally see. Prior to reading his response, I would have made the blurry cam line at/around mid 250’s @050. And it is blurry because the rest of the engine combination can vary on a huge level and this is before we even discuss the rest of the drivetrain or the cars suspension set up and weight.

In the MP speed tips section, the information there is good and valid “For the time period of print” to be known to work and work well. While I would not support the use of a six pack over a good 4bbl intake, the best at the time, but out of production was the LD-340, which MP did sell over there counter with a Chrysler part number, once it was no longer made, they naturally sold there own “Best Intake”, the 6 pack. But the 6 pack is still a dual plane intake powering a car into the 11’s. That normally takes a cam in the 250 @.050 area under OE engine displacements.

Here is a good way to look at a single planes best time to use. Notice there operating rpm range. While it may be as low as 3K rpm, there normally rated rpm high end use is 6500 and better. If the cam you have in the engine your using isn’t making good hp at and north of 6500 rpm, your half way to a dual plane use.

Part two is how low of a rpm does the engine make power? Do you use it down there? Is the converter flashing below 4500? If so, your most likely using a dual plane intake at this point.

It has been long said that a single plane is for racing. And if your going to build a serious race car, then a single plane is what you want.

Yea yea yea you can bracket race very seriously with a freakin Cricket & it’s 4 banger.... I know, I know....
:rofl:
A lot of people here do really well with a rpm. Check out the racers top section stickies. The faster you go, the less use of a dual plane vs the more usage of a single plane takes place. Then you’ll also note cams are big along with the stall rating, higher gear ratio, etc....