For those that are interested.

I just installed this intake horn and wanted to share my findings. Like a lot of folks on this and other sites,I have been following developments on the various intakes.
I chose the CFM because it seemed to be the closest to my idea of how an intake should be designed. The fact that it does not have any advertising molded in to it put it over the top of AFE and ATS on my list

With that said, lets get to the good part.

My truck is about as stock as you will find (on here).
ONLY mods are AEM workhorse dry intake, muffler delete, and pyro gauge.
NO boxes,chips,foolers,injectors,etc.
Heater Grid remains installed.

I took the truck in for a BEFORE run on the dyno on friday.
I installed the CFM on saturday and will take the truck back for an AFTER run on monday.

They only measured HP and TQ at the wheels(no tach hookup)
4 runs were made. Two were 4th gear only and two were rowing the gears.
The second run was a little better than the first and the two shifting runs were inconclusive due to the shifts.

Here are some pics for your enjoyment...

BEFORE...







DURING...









AFTER...





Stay tuned for "after" dyno results

 

quick question for ya...why did you dyno in 4th gear??

 

someone clear this up for me. he says it is stock but am i reading 1300 lbft of torque on that chart? the HP seems correct with a stock truck but the torque is a bit high. nice write up so far. keep up the good work

 

I do not think you can get a direct torque read out with out a rpm pick up. When I dynoed mine with the AFE intake it was done in 2nd (48re)with a 15k load applied to try to approximate towing with a heavy trailer.

Bob

 

I'm not sure why 4th gear. I was just letting the dyno guy do his job.It seemed that while he was letting it all warm up, he was trying all the different gears to see which one felt like it pulled the hardest.

As far as the torque #s, I was shocked myself.
The tech said that it was at the rear wheels after being multiplied through the trans, rear gears and 285/70-17 tires.

As long as we do the after test the same way, it still should give us the data we want. Isolating the gains on nearly stock truck

 

so much hp and tq more did it put down than stock. I cant read charts to well I like numbers

 

Hopefully I can do the "after" dyno tomorrow.
The above chart is just the the "before" dyno run.

220HP/1353TQ at the rear wheels in 4th gear

 

Thats just not possible. I'm sorry. 1300 ft-lb of torque? And only 220hp? You shouldv'e put out more hp and less torque. MUCH less torque. Like 290hp and 550ish on the torque.

 

yeah, the tq numbers are definately incorrect. if the rpm signal was no good you will get the hp by speed.

 

put it on my truck and can't really tell it's there

 

If you look it is a Mustang dyno which is a load dyno and the numbers would be right with it running in 4th gear the trans increases the tq to the rear wheels and the tq is figured from the load of the dyno. the mustang dyno does not use a RPM pick up.

 

well we know the truck isnt making 1300 lbs. of tq so to me it doesnt matter how the dyno came up w/ those #'s because its still incorrect.

 

If it were 1st gear he'd have made 10,000 lb-ft of torque and 70hp. Don't you guys understand how a transmission works? What do you think gets your tank moving from a stop sign?

Andy

 

Why was the test run with the 6spd transmission in 4th gear? 5th gear is the 1.1.

MikeyB

 

Hello,

That is 2 HP graphs. The curve does not even come close to matching TQ shape.

Dyno operator does not know his stuff. Going thru gears to find which one pulls the best idea is silly. Proper information is from a 1:1 run.

Damon