My buddy and I were wondering if anyone has used the CamQuest camshaft calculator and seen similar results on a dyno. The numbers seem inflated but i dont have any proof.

Thanks, Chas

 

My brothers Ford makes about 70 HP less than what camquest said it should.

You have to remember, they are trying to sell you their cams. Of course the numbers will be high.

 

I downloaded it,seems to me that it's nothing other than another variation of Desktop Dyno 2000.It seems to inflate the estimated output about the same,as well.It is a bit more detailed,but still leaves out connecting rod length,rocker arm ratio,carb type,and a few other details that can and will play into an engine's output.

 

Idk depending on the set up I dont think its too bad. Although you have to keep in mind real world VS simulation. In theory there numbers are a good approximation assuming the given parameters are correct. The problem comes in the real world. For example our cars. Our cars have terrable exhausts on them and even selecting what would seem to be appropriate based on there options is better then what we actually have on our cars (stock). Their dyno sim doesn't account for parasitic losses caused by things like power steering and air conditioning and i cant say if they figure in things like the water pump. They cannot account for a tune thats not perfect and never will a tune be truly perfect. All and all I believe their numbers are reasonable in theory at least but in practical real life terms not always so realistic when you add in the factors they didn't account for. Though some estimates are better than others many from what Ive seen have come up reasonably close to the actual result to be considered a good approximation.

 

Agreed.

I've found it to be reasonably accurate if you're a little on the conservative side with your engine specs. Remember that it is calculating what are basically optimized conditions for everything. Doesn't equal what you will see "as installed in your vehicle" sucking hot underhood air, turning a bunch of accessories, etc. And it definitely isn't going to equate to what you see at the rear wheels.

It calculated ~470HP for the mild blower motor in my Malibu. It actually made 390HP at the rear wheels (using fairly conservative specs on carb flow, head flow, exhaust system, etc.). Factor in a 20% drivetrain loss and that actually lines up pretty close.