cold air intake
Melting Slicks
Joined: Feb 2001
Posts: 2,803
Likes: 358
From: Northville, MI
Unless it was a load bearing dyno, it is not going to give you the results of a street scan/log. We have had many club members thru the years who worked in the dyno room at the proving grounds and others who developed the engine coding for the C4,5,6 and 7, base and Z06/Zr1 engines engines who will disagree with you. On the C5, they would scan/log in the development stage and run a cycle including WOT to 142 mph and get the results of a chassis dyno but with the forces of weight, drag, and friction thrown in. Until the tuning software began to unravel (reverse engineer) the PCM, that was standard proceedure for many scca racers.
Safety Car
Joined: Jan 2012
Posts: 3,956
Likes: 520
From: Da U.P.
Ram air intakes are basically a marketing term. Years ago there were articles on the ram effect of air on an internal combustion engine and as I recall it was about 4 hp at 75 mph and did not make much difference until you were at 150+ mph. For the C5 Corvette you are looking at two sources of air to the engine, those systems that are using engine bay air (which can easily exceed 150F) or outside ambient air. OF the latter, there are a few commercially available and some old standby's. Callaway and Vera-Ram are the better known with a Halltech-thu the front license plate opening-, Icebox, and Vortex. All the others are using the heated engine bay air, some are better filters than the others. The LS1 engine has over 80% of its operating (PCM) system as predetermined, unchangeable, firmware and about 19%, tuneable, of it being able to change.
Melting Slicks
Joined: Feb 2001
Posts: 2,803
Likes: 358
From: Northville, MI
The VeraRam at about 130 starts to loose air speed because the air intake is in a low pressure area. The true ram air intakes can be found on drag car, the sped and effects were calculated by some GM engineers using a wind tunnel and then extrapolated to higher speeds and the effects at various engineering schools.
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Better cold air system would be the Callaway Honker. It is designed to pull in the outside air and not from the engine bay.
Last edited by Ikester; May 10, 2020 at 09:39 PM.
