When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm going to install and plumb my Heat Exchanger next. Being new to the FI world I have many questions. Here's 2 more..... Does the Intercooler pump - the Bosch unit that most use - run all the time? Or just under boost? Or controlled by a Temp Sensor? Might be a dumb question but - Rookie.
Also, I removed my Secondary AIR pump and lines. I am hoping to mount the Bosch IC pump in the location of the now missing AIR pump. There is room in that spot now. I think I understand the AIR system and that is only runs for a short time to help O2 sensors warm up quicker. Would it be possible to re-purpose that wiring to run my IC pump?Is there a way to trick the PCM with tuning to run that pump longer ( based on Question #1)? or maybe re-pin some wires in the fuse box? It seems to be on a relay circuit so power draw 'should' be handled and safe? The wires on the Bosch pump are only 16g? - very thin! I'm not sure why I'd need a relay in line but it never hurts, right? If it draws a ton of power I would think the OEM would have put bigger wires on it.
I love learning all this - Thanks for any help!!
Aftermarket inter-cooler pump setups are typically wired so that the relay is energized by a 12V wire that is only hot when the ignition is ON. You are correct that the intercooler pump does not draw an excessive amount of power, maybe a couple of amps, however, if you were to wire the pump directly into an existing electrical circuit on the car, it could very well put that circuit over the fused protection limit of that circuit, causing the fuse to blow. By the addition of the relay, it provides two separate circuits: Power and Control. The Power circuit is the circuit that would be used to power your pump, fog lights, etc., and is wired to the battery or load distribution center to supply the current for your load (amps). The control circuit is the circuit that causes the relay to change states (on/off) and can be tapped into your existing ignition circuits, as it uses very small amounts of current (.050 amps approximately) without fear of overloading them.
As to the AIR circuit being used to run the intercooler pump, somebody else will have to answer that one...
Thanks for the reply!!
Anyone have thoughts on the AIR circuit used to run the IC pump? Would be VERY handy - could also be a lot of work.
After I got home, I took a look at a C5 Corvette tune file that I have, as well as doing a quick Google search. Turns out you should be able to use the AIR circuit, and it should be quite easy. The tune controls when the AIR pump runs (temperature based), and it's an ON/OFF value. Set the temp to the lowest value, and the AIR pump circuit will always be energized when the engine is running.
That's very interesting - THANKS!!
I appreciate the effort. I know ZERO about tuning but I have friends that are pretty good with HPT. I FWD this thread to them already and will be anxious to share what you found.
Good Job!
I've been running a custom air to water over sized intercooler with two heat exchangers, and a ford lightning pump. Since air is constantly going thru the intercooler weather you are in boost or not, I like to have the pump ALWAYS on to help keep things cool. I also run duel meth, which of course just comes on under boost...
Definitely don't make this more complicated than necessary.
Supercharger Online store sells a premade bosch relay harness with the proper connector.
Over Complicate ! ? Who, ME?? Sorry, it's a curse and one of the reasons MY **** takes so long to get done.
SCOL - I just talked with them today. Funny how that works...
But thanks for the replies - I'm on it... sort of.
After I got home, I took a look at a C5 Corvette tune file that I have, as well as doing a quick Google search. Turns out you should be able to use the AIR circuit, and it should be quite easy. The tune controls when the AIR pump runs (temperature based), and it's an ON/OFF value. Set the temp to the lowest value, and the AIR pump circuit will always be energized when the engine is running.
Hello BatMan
Sorry to Bring this back up - well, maybe not THAT sorry. I just got a HPT v2 and looked at that. I know VERY little yet so I asked support about using that circuit - simply because it's already there, has a relay and is handy. BOY, Did I get yelled at! I heard that the Gubmint got on them about emissions and the tech made it VERY clear that they won't even answer a question about deleting ANYTHING that has to do with it. All I can see is what you show in the Screen Shot - But WAIT! There's MORE...
...to that system than I might want?. There are temp, Timing and other things controlling that AIR pump - they just don't show up in HPT. Do you know any more about it? If it's just a GIANT PITA then I might take Mr B's advice and 'roll my own'. What do you think??
Yes - I do think too much. Yes, I've been accused of Over Complicating. But I really can't help myself.
Thanks!
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
Intercooler Pump Run Time - Always on?
