Relay holder???

diesel_lv

FBBO Gold Member
FBBO Gold Member
Local time
1:17 PM
Joined
Dec 17, 2018
Messages
1,530
Reaction score
1,825
Location
Arizona
On my '67 Coronet, I just received a new dual e-fan shroud setup to try on my 496. I have 3 relays for it, 2-70 amp, 1 for each fan, and 1 from the a/c to trigger both when the a/c is on. I have one 50 amp for my fuel pump, and 2 30 amp for my headlights. I am trying to find an modern OEM relay holder that can handle this load, is waterproof, and has room for all 6 relays that I can mount under the battery. Does anyone know of a relay holder/box of this nature? Not a cheap Amazon one, I've seen those melt.

Thanks in advance.
 
Last edited:

451Mopar

Well-Known Member
Local time
1:17 PM
Joined
Oct 25, 2011
Messages
3,113
Reaction score
2,388
Location
Aurora, CO
I'm using the Bussman relay/fuse box, but it takes mini-fuses and mini-relays that are only rated at 35-Amps. Connections are Metri-pack 280 style.
This one holds 5 relays and 10 fuses:
https://www.waytekwire.com/item/46343/EATON-s-Bussmann-15305-2-2-4-Mini-Fuse-Panel-/
This larger one is 10 relays.
https://www.waytekwire.com/item/463...MI-7jZ0Pau8gIVxBB9Ch3_sACIEAQYBCABEgIwyfD_BwE
8-relay, 8-fuse with plug in connections, but expensive:
https://www.waytekwire.com/item/46055/EATON-s-Bussmann-Series-31S-000-0-ssVEC/
 

diesel_lv

FBBO Gold Member
FBBO Gold Member
Local time
1:17 PM
Joined
Dec 17, 2018
Messages
1,530
Reaction score
1,825
Location
Arizona
I'm using the Bussman relay/fuse box, but it takes mini-fuses and mini-relays that are only rated at 35-Amps. Connections are Metri-pack 280 style.
This one holds 5 relays and 10 fuses:
https://www.waytekwire.com/item/46343/EATON-s-Bussmann-15305-2-2-4-Mini-Fuse-Panel-/
This larger one is 10 relays.
https://www.waytekwire.com/item/463...MI-7jZ0Pau8gIVxBB9Ch3_sACIEAQYBCABEgIwyfD_BwE
8-relay, 8-fuse with plug in connections, but expensive:
https://www.waytekwire.com/item/46055/EATON-s-Bussmann-Series-31S-000-0-ssVEC/
Ya, the fans are 45 amp each initial kick on and both come on at same time. I've got individual sealed relays but would much rather clean up the wiring w a box and not drill so many holes for relays and fuses.
 

diesel_lv

FBBO Gold Member
FBBO Gold Member
Local time
1:17 PM
Joined
Dec 17, 2018
Messages
1,530
Reaction score
1,825
Location
Arizona

diesel_lv

FBBO Gold Member
FBBO Gold Member
Local time
1:17 PM
Joined
Dec 17, 2018
Messages
1,530
Reaction score
1,825
Location
Arizona
You can likely use a 40 amp relay if the load is startup/surge 45 amp. It will reduce the cycles the relay can withstand over useful life. Not a big deal most of the time. Maybe call TE and verify with a tech/rep.

TE has 50 amp relays that are normal .250 blade connectors. No special terminals. Std relay connector/block.

bosch number 0332019103
50 amp, 4 terrminal
Not asking about what relay to use, have that entirely under control. As stated in my 1st post, looking for an OEM or equal quality waterproof relay box that can handle my combined amperage without melting.
 

Ironbuilt

Well-Known Member
Local time
3:17 PM
Joined
Jul 1, 2017
Messages
17,281
Reaction score
38,282
Location
North Carolina
On my '67 Coronet, I just received a new dual e-fan shroud setup to try on my 496. I have 3 relays for it, 2-70 amp, 1 for each fan, and 1 from the a/c to trigger both when the a/c is on. I have one 50 amp for my fuel pump, and 2 30 amp for my headlights. I am trying to find an modern OEM relay holder that can handle this load, is waterproof, and has room for all 6 relays that I can mount under the battery. Does anyone know of a relay holder/box of this nature? Not a cheap Amazon one, I've seen those melt.

Thanks in advance.
That seems like a rather large relay for an electric fan. How much amperage draw are you getting when it kicks on? I use 40 amp relays on both my electric fans with under 23 apms draw on both.
 

Sinitro

Active Member
Local time
12:17 PM
Joined
Mar 6, 2021
Messages
44
Reaction score
37
Location
Southern California
Suggest U check the new power switching blocks from MSD..
Available in 20 & 35 Amp, very clean and compact mounting.
https://www.holley.com/products/electrical/wiring_and_relays/parts/75643-HC
75643-hc_01.jpg

Just by $0.02...
 

diesel_lv

FBBO Gold Member
FBBO Gold Member
Local time
1:17 PM
Joined
Dec 17, 2018
Messages
1,530
Reaction score
1,825
Location
Arizona
Suggest U check the new power switching blocks from MSD..
Available in 20 & 35 Amp, very clean and compact mounting.
https://www.holley.com/products/electrical/wiring_and_relays/parts/75643-HC
View attachment 1151974
Just by $0.02...
Thank you, I had seen those before but did not read all the details. All I saw was 35 amp n moved on. But just read they can handle much more for minutes, and the fans pull a lot for seconds. They can also be positive trigger on some and negative on others. Looks like what I need.
 

70chall440

Well-Known Member
Local time
12:17 PM
Joined
Feb 11, 2018
Messages
3,486
Reaction score
4,972
Location
Yelm, Washington
Gotcha, I haven't seen (or looked for) a distribution center that will take 6 relays.
 

451Mopar

Well-Known Member
Local time
1:17 PM
Joined
Oct 25, 2011
Messages
3,113
Reaction score
2,388
Location
Aurora, CO
I found a cheap 6-relay distribution center on Amazon, but it is not sealed.
 

diesel_lv

FBBO Gold Member
FBBO Gold Member
Local time
1:17 PM
Joined
Dec 17, 2018
Messages
1,530
Reaction score
1,825
Location
Arizona
Called Holley on the above relay setup. They said yes, it can have positive for 2 and negative for 2 triggers. And that it can handle up to 100 amp per relay for a few seconds. I think this will be my cleanest option. Pricey, but cheaper than doing it twice. I'll just leave my sealed headlight relays alone. Thanks for everyone's input.
 

Sinitro

Active Member
Local time
12:17 PM
Joined
Mar 6, 2021
Messages
44
Reaction score
37
Location
Southern California
Yup... Electric fans pull a lot of current @ startup...
But then fade down to a significantly lower level. The nice thing about the MSD/Holley part is that they use power transistors rather than relays with contact points...

Just my $0.02... ;)
 
Top