CFM+ 57.7hp/159.5tq @ 1900rpms

GDP Power Flo 52hp/136tq @ 2000rpms


MikeyB

 

i think if you have enough mods every little bit helps, it spools faster and drops egts some too

 

I would think the dyno would be better. After all, it's not how much air the intake can flow that makes power, but how everything works together.

 

Anyone running one with a stock or very close to stock truck?

I want to replace my horn because that OEM restriction kills me... The CFM+ is what I am looking at as it has the best increase at 1900 rpms, right where I want it when mountain towing...

So any stock dyno testing on it?

 

The test the Erik did was on a truck that was pretty close to stock IIRC. Maybe he'll see this and chime in; however, I think it is significant to note that after all his testing was done... and this was all dyno testing, not flow testing... he chose to keep the CFM+ on there.

I got it as a result of his tests, and my own need for improvement in the mountains and I can say it delivered. For me and my purposes, it was a worthwhile investment.

 

seems to me flow is flow and if one intake is not capable to flow as much as the other intakes then it cant make the same power.......diesels need lots of air and fuel...thats what makes power, so the more air flow an intake is capable of the more power it can produce.

this is what I think anyway??

 

You have a point, but if it were simply introduced that way on this forum, then you would have had so many people here arguing "I don't care about that, what does the DYNO SAY!!!" The dyno is significant as it also shows where the gains happened too.

If you look at the CFM+ box, their ad shows flow rates comparing them to stock and Banks...

 

I can see your point, but the way I was seeing it, is, if I got a piece of 8 inch pipe and made an intake horn out of it, there would be more flow, but the intercooler and intake to the motor would be the restriction. And with a better funneling capability to force the air into the motor as opposed to hitting the flange on the intake side there would be better flow characteristics that wouldn't be seen in just flowwing the intake horn itself.

 

The GDP horn test was done on my truck. Silverbullet, DDP 90's (at the time), Smarty, Stage 2 pump. Here's the link (click the "read more" link after the 1st few paragraphs for the full write up). http://leftcoastdiesels.com/index.ph...d=19&Itemid=51

 

IIRC, the tests Erik did was CFM+, AFE and ATS...

 

Hey guys, just saw this. The CFM rocks, and I did keep it for myself. We did a test on a pretty well modified 2nd gen on Saturday that I still have to post. It did basically the same thing..100tq/50hp in the meaty part of the powerband and it helped clean up that smokey beast.

The GDP was almost as powerful, and a whole lot less$$. Either way, you can't go wrong!

 

The GDP was a later test, but still showed similar gains