Pressure (boost) switch

[MadMaxHSV]

Anyone know where I can get an adjustable boost pressure switch from?
Lots in the US but surely you can get this sort of thing here?
Most nitrous, meth, etc kits come with one but can't find one to buy separately.

[crisisjez]

I just bought a nitros wet controller from Regal in Southampton for £299.00. They may have something suitable.

[ringram]

Are you sure you shouldnt be running nitromethane instead mate!?

[crisisjez]

Its not for mine

[anonymous-user]

if you want gear boost control, why not try one of these? www.ams1000.com/home/e107_plugins/content/content.php?content.3

"You can control multiple waste gates , valves, blow offs on supercharged systems thus giving you boost control". I'm told it can also be made to bleed off pressure using the bypass valve on Maggie blowers.

Edited by anonymous-user on Tuesday 2nd March 12:23

[Slinky]

wormus said:

if you want gear boost control, why not try one of these? http://www.ams1000.com/home/e107_plugins/content/c...

"You can control multiple waste gates , valves, blow offs on supercharged systems thus giving you boost control". I'm told it can also be made to bleed off pressure using the bypass valve on Maggie blowers.

The NLR AMS-1000 is indeed a cracking bit of kit, so much so, we used one on RedVictor2 and will be using one on RV3 as well..

It's an Air Management System (hence the name) and uses a pair of solenoids (increase & decrease) to control pressure in a valve.. We use it to augment the spring pressure within the two wastegates and give us exceedingly fine levels of control of boost pressure.

You will need a source of compressed gas for it to work correctly though.. You'll also need a gear position sensor output (with a 0-5v analogue signal)..

I have the manual here if you'd like a read..

[MadMaxHSV]

all I want is a pressure switch to turn on a secondary fuel pump.

[Slinky]

Surely something from this search @ Jegs could do the job..

Alternatively, if you're using an aftermarket ECU (which I suspect you probably aren't) have you got configurable outputs that could be used to drive a secondary fuel pump when criteria are met?

[MadMaxHSV]

I can get stuff from the US I just couldn't believe nothing was available here.
No i'm stock ECU so no fancy external switching circuits to easily tap into.

[Slinky]

Just out of interest, if you do manage to find such a switch and manage to get it working, how will your engine cope if that side of things fails? Imagine the scenario, big fuel requirement for engine, pressure switch fails (or circuit) drops power to 2nd fuel pump instantly providing a scarily lean AFR..

[anonymous-user]

MadMaxHSV said:

all I want is a pressure switch to turn on a secondary fuel pump.

why didn't you say? I have a Magnavolt fuel pump booster on my car which works on vacuum (I think) to switch on the second pump according to load. Speak to Mark at Rapid and he'll give you the details:

www.magnusonproducts.com/pdf/manual-fuelpumpbooster.pdf

Edited by anonymous-user on Tuesday 2nd March 14:16

[MadMaxHSV]

I agree it's an issue, but as with any twin (parallel) pump setups (even running both on full duty if one fails)
I'm just hoping to build it robust enough and with monitoring on fuel pressure etc to hopefully catch any issues should they arise.
(could always jumper the second to be always on if required)

I don't see switching to a single large pump or external series secondary pump as practical/reliable option either for a road car.

[MadMaxHSV]

wormus said:

MadMaxHSV said:

all I want is a pressure switch to turn on a secondary fuel pump.

why didn't you say? I have a Magnavolt fuel pump booster on my car which works on vacuum (I think) to switch on the second pump according to load. Speak to Mark at Rapid and he'll give you the details:

http://www.magnusonproducts.com/pdf/manual-fuelpum...

Edited by wormus on Tuesday 2nd March 14:16

I've got a Magnavolt but wasn't planning on using it as i'm upgrading the fuelling, but hadn't thought about using it somehow for the second pump

[TerryS]

look up ERL www.aquamist.co.uk (P/N 806 155) but you'll probably find them at RS Components. If you get stuck I have a few kicking around.

Edited by TerryS on Tuesday 2nd March 16:28

[anonymous-user]

MadMaxHSV said:

I've got a Magnavolt but wasn't planning on using it as i'm upgrading the fuelling, but hadn't thought about using it somehow for the second pump

I have dual pumps but only one is running until 4lbs boost. If the system fails it sets off the handbrake buzzer.