HP Gains per Dollar Intake Chart

[2forme]

Originally Posted by benster

yes, so do I always dyno my cars while at freeway speeds..... the reason they dyno with the hood open is to simulate the wind going in the engine bay while the car is moving. if some of you didn't get that maybe you should put a wind speed sensor under your hood and go for a drive. there is wind movement at speed and most of the underhood air isn't scorching hot everywhere.

They have high speed dyno fans for wind simulation.

I've done temperature testing at the intake level on several intakes. The AIRAID is marketed as a CAI and was much hotter than the AFE which extends further towards the bumper hole.



This was done in 3rd on the freeway. Now imagine an SRI that sits even further back toward the motor.

*DISCLAIMER* this is just for comparison purposes, I am not trying to say the AFE is the best intake EVAR!

[sevi21]

Well gives people some sort of idea. Thanks for the thread @naikaidriver

[zooki]

I've never understood people who say "We'll, it may not make any more power, but I feel the difference in throttle response". If the car revs quicker, it has to make more power. Period. The relationship of horsepower to torque demands this. If your car doesn't make any more power on the dyno, yet you claim it has better throttle response, you are deluding ourself.

[Calidrifter]

The price listed for the HKS is incorrect. There are 2 HKS intakes:

- Premium Suction (Pipe replacement and filter) uses stock filter box.
- Racing Suction Reloaded (Full intake replacement)

Premium is ~330
Racing is ~ 650

[Foobar]

Originally Posted by zooki

I've never understood people who say "We'll, it may not make any more power, but I feel the difference in throttle response". If the car revs quicker, it has to make more power. Period. The relationship of horsepower to torque demands this. If your car doesn't make any more power on the dyno, yet you claim it has better throttle response, you are deluding ourself.

A lightweight crank pulley can improve throttle response yet have no impact on horsepower produced. Alternatively, you could strip 500 lbs off your car and realize better throttle response, yet you've done nothing to increase power output.

[Allch Chcar]

I appreciate the effort, it's a great idea, but you really need to put some more effort into providing sources of 3rd party numbers for it to be truly excellent.

Right now it's an okay starting point. The numbers aren't worthless but you really only narrowed it down into the two groups worth looking into, those with low prices and make a few HP at a competitive cost per HP and the more expensive setups that do similar but at a higher cost. The other intakes being outliers or aberrant being the intakes to avoid.

[jwjknorr]

Your very off on cost, and would need to refrence a real dyno and not a manufactures guess. Aem intake 340 shipped to my door. But A for effort

[jwjknorr]

Originally Posted by Foobar

A lightweight crank pulley can improve throttle response yet have no impact on horsepower produced. Alternatively, you could strip 500 lbs off your car and realize better throttle response, yet you've done nothing to increase power output.

You my friend took the words right out of my mouth. Not sure where the other guy got his info from.

[blackraven1425]

Originally Posted by jwjknorr

You my friend took the words right out of my mouth. Not sure where the other guy got his info from.

Under the assumption that the engine revs from the bottom to the top of a given range (i.e. 3k to 7.8k) in the same exact amount of time, the only other possible difference is in actual power output. If the power output is the same, and that assumption is in place, there would be deluded people who think the engine responds quicker.

[zooki]

Yes, you're right. I guess I should have clarified my earlier statement. I was assuming that we were talking about intake systems. In the case of lightweight pulleys, or anything else that affects weight, you CAN have a quicker acceleration rate without any additional horsepower. Since force(horsepower) equals mass times acceleration, if you reduce the mass(either the reciprocating weight of the motor, or the total weight of the car) you can have a larger acceleration number, but with a smaller mass the force can come up to be the same. Very simplified, and using random numbers:
F=M x A
15=5 x 3 if the weight is 5 and the acceleration rate is 3
Now drop the weight to 3, and you can have a quicker acceleration rate 5 with the same amount of force, 15.

[cfusionpm]

Originally Posted by zooki

Yes, you're right. I guess I should have clarified my earlier statement. I was assuming that we were talking about intake systems. In the case of lightweight pulleys, or anything else that affects weight, you CAN have a quicker acceleration rate without any additional horsepower. Since force(horsepower) equals mass times acceleration, if you reduce the mass(either the reciprocating weight of the motor, or the total weight of the car) you can have a larger acceleration number, but with a smaller mass the force can come up to be the same. Very simplified, and using random numbers:
F=M x A
15=5 x 3 if the weight is 5 and the acceleration rate is 3
Now drop the weight to 3, and you can have a quicker acceleration rate 5 with the same amount of force, 15.

Technically the engine would still be making the same power, it would just be translating it more efficiently to the ground. If you can reduce loss of energy through mechanical transfer, you can get to your power quicker; rev quicker, get to your next gear quicker, etc.

Disclaimer: no real world experience with changing flywheels or pulleys, but its one of the first things I upgrade in teh vidjya games like Forza and Gran Turismo.

[jwjknorr]

Originally Posted by blackraven1425

Under the assumption that the engine revs from the bottom to the top of a given range (i.e. 3k to 7.8k) in the same exact amount of time, the only other possible difference is in actual power output. If the power output is the same, and that assumption is in place, there would be deluded people who think the engine responds quicker.

Read the post bellow yours above this. :happy0180:

[Trashed675]

@naikaidriver

K&N just released a Typhoon system
http://www.knfilters.com/search/prod...prod=69-8619TS

looks like 6.67hp for $325 = $48.72/hp

[StarsGarrador]

I have an airaid... and I got it for $220.. during the group buy and WTF rebate.