Speak to us man.....speak to us......
the thing that's interesting is that it IS possible to do it under the dash there, so being a junkyard maven....this fall, when summer is over here in Florida, some November...I will go junkyarding and find some likely candidates...but I gotta have a concept clear for what I looking 4.....NOW, I got nuttin'.....
HRA = vacuum operated system VA = mini-computer - all electric servos
HRA = Plastic firewall housing VA = Steel firewall housing
HRA = all soft lines VA = Pre-bent alum and soft lines
HRA = Twin blower fan VA = Single spal fan
HRA = fair instructions VA = Good instructions
HRA = uses stock control with mods VA = stock control with mods
Both systems are really hard to fit behind the dash as there is very little room to spare in terms of running all the tubes and hoses. VA does a little better job on working out the plenum and duct work, but both leave much to be desired in the final fit department.
The VA is a more complex system that is more prone to electronic glitches - where HRA is standard relays and vacuum signals and can be tested manually.
Customer service at VA is head and shoulders - as HRA has some issues with call backs, getting messages, and handling issues quickly. VA will respond by email or phone and is great about following up.
both systems cost about the same and it is a toss up as to which one is better.