Rear spring suggestion/rear tank conversion

Hanzo111

Hanzo111

Member
Hi everyone, moved my fuel tant to the rear on my 1987 defender 90 RHD. 17gallons.
Im replacing suspension now and just remembered the extra weight will be in the rear.
I already installed stock springs in the front. Any suggestions on which springs to install in the rear?
 
rocky

rocky

NAS-ROW Addict
Great question but your talking about less than 100lbs in weight that’s now distributed evenly left to right rather than being all on one side.
No factor stock is the right answer
 
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project90

Member
Hi Hanzo, would love to see your tank conversion write-up, i'm probably going to do the same thing and would love to see how you did it and what parts you used.
 
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project90

Member
Nice! thanks for sending the jeep tank you used, you were able to fit a 17-gal tank in right? (the ebay listing is for a 15-gal tank). I look forward to seeing your write-up.
 
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DBrands

Member
project90 said:
FLY, I had the same question. I have a UK spec 90 with a filler mounted in front (not behind) the rear wheels.
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Most people that add a tank to the rear want extra capacity beyond just the under-seat tank. Easiest is to Y the existing filler pipe to feed back to the rear tank over the top of the spring perch. It isn't elegant but it works.
 
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project90

Member
Ahh! So it's an additional tank that people add? For some reason, I just figured that they removed the original tank, but adding a second one makes a lot more sense.
 
Hanzo111

Hanzo111

Member
DBrands said:
Most people that add a tank to the rear want extra capacity beyond just the under-seat tank. Easiest is to Y the existing filler pipe to feed back to the rear tank over the top of the spring perch. It isn't elegant but it works.
Click to expand...
I converted to a Chevrolet 6 cylinder gas engine. I don’t want to set on top of a bomb so I moved my tank to the rear. Sitting on top of diesel is ok but never gasoline.
 
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project90

Member
JimC, how do you run your fuel pumps for the two tanks? Do you have a separately wired switch to turn on a pump in the rear tank to essentially refill the front tank?
 
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O2batsea

Well-known member
Hanzo111 said:
I converted to a Chevrolet 6 cylinder gas engine. I don’t want to set on top of a bomb so I moved my tank to the rear. Sitting on top of diesel is ok but never gasoline.
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I dunno what you're implying with this but a gasoline tank won't spontaneously explode. The rest of the truck would have to be on fire first.
 
Hanzo111

Hanzo111

Member
O2batsea said:
I dunno what you're implying with this but a gasoline tank won't spontaneously explode. The rest of the truck would have to be on fire first.
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Well, I dealt in salvage cars for 20+ years. Also track cars with PCA. I have seen old trucks with side tanks that have gotten hit and its not pretty. Also at Summit point a 944 had a spare tank inside the trunk, well that didn't end well either. unfortunately the driver of the 944 lived, hate to say that, but with burns to half his body. The defender offers NO side protection and the tank will not drop out in a severe accident so ill sleep better at night without explosive fuel under my butt.

Not flaming you but, you do you.
 
JimC

JimC

Super Moderator
Staff member
project90 said:
JimC, how do you run your fuel pumps for the two tanks? Do you have a separately wired switch to turn on a pump in the rear tank to essentially refill the front tank?
Click to expand...

I have a pair of manual switchover valves mounted to the front of the seat box. You have to switch both the supply and return at the same time but that’s not really a problem.

What is a problem is the steady drumming/ticking sound that stems from the injector pulse reverberating through the valves hard-mounted to the seatbox. I’ve been living with it for years, but the OEM solution where one lever on the seat box operated two valves on the chassis rail would be far superior.
 
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