Full throttle Electric Supercharger Build Thread - Page 174 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jpit · 10-25-2013, 12:00 PM

The relay is much easier to install next to the control box in the engine compartment. That's why we are looking there for a power source.

Sojhinn · 10-25-2013, 12:03 PM

Quote:

Originally Posted by HunterGreene

I know the cig lighter is switched

I like this idea as well. Plus the relay would be in a dry spot.

rusty959 · 10-25-2013, 12:06 PM

Quote:

Originally Posted by jpit

The relay is much easier to install next to the control box in the engine compartment. That's why we are looking there for a power source.

Aren't those wires just the ones that go from the control box to the voltage display?

Gary in NJ · 10-25-2013, 12:08 PM

Quote:

Originally Posted by jpit

Gary,

I show circuit 28 to be an EFI fuse. Is this the one you are referring to?

Yes, that's the one. Damm acronyms.

The advantage of using the switched lighter is that you wont need to pass the relay through the firewall opening. I'm thinking that I like that location too. But from a manufacturing standpoint, close to the connector is easier.

jpit · 10-25-2013, 12:12 PM

But I'm showing voltage there with the ignition off.

Robftss · 10-25-2013, 12:15 PM

- 12V+ switched on headlight socket when car running and DRL? Some cars run lower voltage ~4v during DRL.
- you could run a single 20-24Awg ~ 6'-7' from the relay following my harness back to the glove box switched socket(hard wired), ground in engine bay.

Both these sources are fused lines/ and the relay is low current signal.

Sojhinn · 10-25-2013, 12:17 PM

Quote:

Originally Posted by Robftss

- 12V+ switched on headlight socket when car running and DRL? Some cars run lower voltage ~4v during DRL.
- you could run a single 20-24Awg ~ 6'-7' from the relay following my harness back to the glove box switched socket(hard wired), ground in engine bay.

Both these sources are fused lines/ and the relay is low current signal.

Yeah I think this is easiest. and we can run the wire through the loom.

Gary in NJ · 10-25-2013, 12:20 PM

Quote:

Originally Posted by jpit

Gary,

When I test #28 I get 12V readings from both sides with the ignition off.

Can't be. How can you have both sides of a fuse circuit hot? I just double checked it, it's switched.

CajunFRS · 10-25-2013, 12:38 PM

What's the weight of this kit I've looked and haven't seen anything yet.

mid_life_crisis · 10-25-2013, 12:51 PM

Considering that it adds half a turbocharger, a small electric motor and a couple of not too large batteries, the relevant answer to that question is: a hell of a lot less than any other supercharging system.

jpit · 10-25-2013, 12:56 PM

The added weight is from the batteries. I went with a bigger starter battery so I guess the added weight is about 20 lbs. The actual compressor weighs very little.

s2d4 · 10-25-2013, 12:59 PM

Quote:

Originally Posted by rusty959

Is the cigarette lighter outlet in the glove box switched? I'm guessing it is, and the glove box/behind the glove box would be a fine place to stash a relay.

Yeap, 99.99% this would work.
But I wouldn't have the relay so far away from the control box.
A small gauge wire to feed the switching through the sound tube hole = money.

jpit · 10-25-2013, 12:59 PM

I don't know why circuit #28 can have both sides with a 12v reading but that is what I am getting. Sojhinn got the same reading but his post is gone. Don't know why.

Robftss · 10-25-2013, 01:02 PM

Quote:

Originally Posted by CajunFRS

What's the weight of this kit I've looked and haven't seen anything yet.

Compressor ~4 lbs
Control/charger module ~ 2lbs
All cables/harness ~ 1lb
Battery swap (stock 29.6 lbs) (using 21Ahr or PC-680 as starter and 24V dump pack 37.8 lbs) + 8.2 lbs
removing snorkel & resonator ~ - 0.5lbs?

= 15 lbs.

Rob.

10-25-2013, 12:51 PM	#2432
mid_life_crisis Senior Member Join Date: May 2013 Drives: FR-S 10 #103 AT Location: NC Posts: 1,519 Thanks: 101 Thanked 599 Times in 347 Posts Mentioned: 5 Post(s)	Considering that it adds half a turbocharger, a small electric motor and a couple of not too large batteries, the relevant answer to that question is: a hell of a lot less than any other supercharging system. __________________ Necessity may be the mother of Invention but Desperation is quite often the father. “Sex is like Bridge. If you don't have a good partner, you'd better have a good hand.” - Mae West Papa said, "son there's a lot of evil temptations out there. Best to try 'em all so you know which ones to avoid."

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10-25-2013, 12:00 PM	#2423
jpit Senior Member Join Date: Jun 2012 Drives: Subaru BRZ Location: Port Angeles, WA Posts: 338 Thanks: 24 Thanked 234 Times in 86 Posts Mentioned: 22 Post(s)	The relay is much easier to install next to the control box in the engine compartment. That's why we are looking there for a power source.

10-25-2013, 12:12 PM	#2427
jpit Senior Member Join Date: Jun 2012 Drives: Subaru BRZ Location: Port Angeles, WA Posts: 338 Thanks: 24 Thanked 234 Times in 86 Posts Mentioned: 22 Post(s)	But I'm showing voltage there with the ignition off.

10-25-2013, 12:15 PM	#2428
Robftss Senior Member Join Date: Jun 2013 Drives: VW Location: Canada Posts: 270 Thanks: 190 Thanked 392 Times in 145 Posts Mentioned: 109 Post(s)	- 12V+ switched on headlight socket when car running and DRL? Some cars run lower voltage ~4v during DRL. - you could run a single 20-24Awg ~ 6'-7' from the relay following my harness back to the glove box switched socket(hard wired), ground in engine bay. Both these sources are fused lines/ and the relay is low current signal.

10-25-2013, 12:38 PM	#2431
CajunFRS Senior Member Join Date: Aug 2013 Drives: Challenger R/T, CRX SI, Location: Lafayette,LA Posts: 359 Thanks: 87 Thanked 92 Times in 67 Posts Mentioned: 7 Post(s)	What's the weight of this kit I've looked and haven't seen anything yet.

10-25-2013, 12:56 PM	#2433
jpit Senior Member Join Date: Jun 2012 Drives: Subaru BRZ Location: Port Angeles, WA Posts: 338 Thanks: 24 Thanked 234 Times in 86 Posts Mentioned: 22 Post(s)	The added weight is from the batteries. I went with a bigger starter battery so I guess the added weight is about 20 lbs. The actual compressor weighs very little.

10-25-2013, 12:59 PM	#2435
jpit Senior Member Join Date: Jun 2012 Drives: Subaru BRZ Location: Port Angeles, WA Posts: 338 Thanks: 24 Thanked 234 Times in 86 Posts Mentioned: 22 Post(s)	I don't know why circuit #28 can have both sides with a 12v reading but that is what I am getting. Sojhinn got the same reading but his post is gone. Don't know why.

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