Yep I had this item on my "to order" list!!!!

 

I have to cry foul here! If the graph were trended out to cover the slip off the throttle you might see a increase of 20 lb-ft max, not 136 lb-ft like you posted.

I suggest you change your numbers or pull it down and retest.

Andy

 

I added another graph on the website of a run I chose not to use. Note the dip isnt there. I didnt use this one because it showed an unrealistic gain. Turns out the boost pressure was lower when the run started so it didnt peak like it did in the run we chose for running the final numbers. I chose the two "closest" runs.

 

if that still doesnt work for you, put your hand over the graph below 2000. Still works from there on.

 

Would your gains be cut in half of you replace the manifold (with a GDP) and don't replace the heater grid with a grid delete??

 

no, I doubt it, the grid delete is only good for a few, the manifolds are making the largest difference.

 

I have an idea! Realsquash, go buy all of the manifolds tested, rent a dyno for a couple of hours, and tell us how they perform on your truck.

 

Hopefully my foot doesn't slip off the throttle and into my mouth.

Andy

 

Well it looks to me also if you make that line smooth without the dip that it would be about 30hp at 2000rpms.

 

Realsquash-I think it just did.


But really-

Neither I nor Erik are trying to hype up the manifold. It made a little peak power, a decent improvement in midrange power, and it looks good. period. I paid full price for the manifold from Rich, and was going to post results even if it lost power on the dyno. The graphs were presented with an explanation as to any abnormalities, and compared to stock, same truck, same day, etc. I wish I could have had a dyno graph for every part I've ever purchased for my truck! Keep in mind that there are so many variables to consider when dynoing a vehicle, that the results have to be taken for what they are. You can interpret the graph however you want, and um sorry you aren't happy with the testing methods or interpretations.

J.P.

 

Does the CFM or GDP come with the 2 new gaskets for the heater delete?

Thanx.

 

mine came with 2 gaskets.

 

If the manifold really smoothed out that dip under 2000 rpm, that is truly a great thing, but what I'm reading here casts doubt on that. I've seen that dip in many a chart, but now I read that someone's foot slipped off the throttle during a run, and then that there were 3 runs, one that shows even more confusing results. Of course the run where the foot slipped also shows the best gains, and it would seem to me that the dyno operator would make another run if his foot slipped off. Something doesn't add up!

Andy

 

Those ones winspeed has looks cool.
The rubber coated metal.

 

If we cut irregularities, the manifold averaged 20-25HP and 45-65tq from 1800-2300. They are pretty close from 2300-3000, then the gains are 13-20hp and 25-32tq.