How to build a muscle car for better fuel economy?

[BLSTIC]

Originally Posted by Phoenix'97

Since I am using a somewhat restrictive air box with an equally restrictive paper air filter, the added airflow will be a benefit, so I am going to keep the ram-air hood functionality but it does need modification for the LS1 air box I am now using.

Do you have any measurements to support this (or have you seen any)?

I've seen the pressure drop measurements of a few intake systems now and while the entire system can vary from 4" H2O to 35", I haven't seen a filter represent more than 3". For reference 27.5" H2O = 1psi, an airflow meter typically represents around 10", and the maximum ram-air pressure you're likely to see is around 3" at 100km/h.

It's fairly easy and cheap to measure this kind of stuff. $10-80, depending on if you buy a guage or make one. I'm more than happy to point you at some articles explaining how and what to look for in an intake system.

[freebeard]

AutoSpeed - Ultimate DIY Automotive Modification Tool-Kit, Part 1

Julian Edgar at Autospeed. He posts here occasionally.

[BLSTIC]

[grumble] steal my thunder... [/grumble]



I love that site. It basically changed the way I think about car mods to one of science not impression ratio

[freebeard]

Sorry. ...the Dwyer Magnehelic gauge FTW.

[BLSTIC]

I've got one of them. Saved one of my cars from overheating with that

[JulianEdgar]

Or these days you can also use something like this:

[gumby79]

.
One build constraint to consider.

[freebeard]

http://ecomodder.com/forum/showthrea...tml#post562413