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Old 05-12-2020, 11:01 PM   #1
slasherz59
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Default School me on 780s

Sooo after being a fwd and 240 person for years I have stumbled on a reasonable 780.....

How stupid am I? Are they garbage ?
The motor is actually in good running shape...I didn’t believe it either...

How much of the suspension is shared with the 740/940? And are there any provision for motor awaps.... ie are b230’s a possible power plant? Maybe a white block...

I never wanted to own one... but it was just painted, cheap, and debaged.... and it hit me....
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Old 05-12-2020, 11:09 PM   #2
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Depending on the year, some came with factory B230FT's with turbo+ kits. Most (all?) had IRS rear end which shares nothing with the solid axle cars and is the same setup as the late 760's and IRS 9xx cars. Suspension upgrade stuff for those is hard to come up with. The late B280's are supposedly very good and are the most refined of them all (no cam/oiling issues). JohnLane campaigned a turbo v6 242 for a few years at least with great success.

I really like the 90-91 780's- LH2.4 and B230FT in a pretty good looking car.
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Old 05-12-2020, 11:14 PM   #3
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This is a 88
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Old 05-12-2020, 11:18 PM   #4
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I have heard it's the turbodiesel engine you need to steer clear of. if it's petrol B230FT, I'd figure it's as good as any other B230FT engine-wise.
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Old 05-12-2020, 11:20 PM   #5
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I have heard it's the turbodiesel engine you need to steer clear of. if it's petrol B230FT, I'd figure it's as good as any other B230FT engine-wise.
We never got the D24t Bertone's here in the states. We only had the B280 and B230FT.
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Old 05-12-2020, 11:31 PM   #6
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They are an incredibly nice driving car. Their only drawback is they are a bit hard to get certain parts for. An 88 780 will have the B280F V6 and IRS.
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Old 05-12-2020, 11:33 PM   #7
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How’s 1200$? It needs the interior touches up(headliner removed for replacement) and normal mechanical stuff.... was painted but needs finished...
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Old 05-12-2020, 11:47 PM   #8
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Not sure the long term value on them
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Old 05-13-2020, 12:07 AM   #9
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For $1,200, how does long term value even come into the picture? For nice examples, their value is increasing. A couple of them sold for $6,000-$7,000 last year on Ebay. If it runs and drives right now, $1,200 seems like a good price to me.
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Old 05-13-2020, 12:45 AM   #10
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It’s one of those guy said it runs but doesn’t drive, coolant leaks.... I’m just looking at another longer term project and was following a 242gt lead when I found this....

I just haven’t dealt with this specific example didn’t know what real world values where being a rarer car that’s harder to find parts... sometimes the cheapest car is the most expensive one ya know!

Any specific rust areas or just the normal areas
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Old 05-13-2020, 12:56 AM   #11
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They drive well as stated above and the late even fire V6 engine is very nice and generally rock solid.

Coolant leaks could be from hoses to/from the water pump. The PRV engines, even these later ones, use a pretty crazy water pump setup where the entire pump housing is a separate module that is only connected to the engine by several hoses on the back and sides. Nice system since it doesn't run coolant through the intake manifold like many V6/V8 engines do, but if those hoses are old, they'll leak. There is a branch pipe that runs under the intake manifold also, with a few O-rings that can get dry and brittle and leak. Fortunately all of it is cheap and available, and easy to fix.

Go for it, once you drive a 7/9 anything you'll never go back to a 240, they suck compared to these, and the 780 is arguably the most interesting model on the platform, neat cars that are finally getting a little more recognition lately.
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Old 05-13-2020, 02:52 AM   #12
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Any specific rust areas or just the normal areas
I’ve seen a few have rust around the windows and sunroof. Which you don’t normally see on 7/9 cars. A hidden rust spot is the drain channels for the rear side windows. These Italy built cars especially the earliest wasn’t very rust resistant.
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Old 05-13-2020, 08:27 AM   #13
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I had the heater control valve spring a leak on mine
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Old 05-13-2020, 05:43 PM   #14
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Generally on those. The cosmetic parts are going to be hard to source. The spoiler under the front bumper is something many owners damage and is no longer available. Even used it's going to be expensive if they know what they have.

All of the typical suspension wear parts of an IRS 88 764 are going to wear out on that car, too. There is a bushing above the differential that likes to fail along with the usual blown out nivomats. In the front the diagonal stay rod bushings and ball joints are common wear problems.

For that price you are getting a good project. They do drive nicer than the standard 700/900 cars and look much nicer with their Euro looks unlike the 700s which look like an american car.
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Old 05-13-2020, 07:40 PM   #15
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V6?

I've heard little good about them, at least as compared to a red block 4 cyl.

Unless you're handy with a wrench I'd pass, othewise go for it: sounds like a lot of work will be required to sort it out.
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Old 05-13-2020, 08:58 PM   #16
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I really like driving mine, but it's the B230FT, I replaced the nivomats with Toyota Previa springs and shocks from Rock Auto for $90. Converted the radio suppression relay to Bosch ice cube relay, heater control valve was in stock at O'Reilly's, I have to unplug and plug the maf every once in awhile when it starts running poorly. It's a awesome highway cruiser, just soaks the bumps up. My seats only go up and down and forward and back, but they're still pretty comfortable. Rock Auto also has the trunk lid gas struts for cheap.
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Old 05-13-2020, 09:44 PM   #17
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I have had a few and really like them. Google the history on them. Bertone “hand built” them. Trim pieces are expensive. I got a leather kit from Road Wire=cheap.
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Old 05-14-2020, 12:36 PM   #18
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V6?

I've heard little good about them, at least as compared to a red block 4 cyl.
Who told you that?
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Old 05-14-2020, 02:45 PM   #19
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^^

So called "tribal knowledge". And, incorrect at that. The early PRVs had some serious problems. By the time the engine was being used in the 780 they were rock solid engines. A bit difficult to work on, yet, reliable and made decent power. They run smooth as glass.
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Old 05-14-2020, 08:37 PM   #20
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B280 is the best they got in a Volvo. Which was pretty good. Talk to John Lane and he'll tell you the parts to use from an Eagle Premier/Dodge Monaco? to make it even better.
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Old 05-15-2020, 08:09 AM   #21
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The 780 was intended to have a twin turbo V6 but the engine bay was too small to shed all the heat produced.
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Old 05-15-2020, 03:31 PM   #22
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The 780 was intended to have a twin turbo V6 but the engine bay was too small to shed all the heat produced.

WOT???


I’ve had three 780s, ( plus parted out a few others for all the hard to find bits to keep as spares) Converted an 88 B280 to a b230ft......then transplanted a B230 lh2.4 into an LH2.2 .....etc...Plus I think I still have two complete B230 lh2.4 780 wiring kits....( each weighs about 30lbs!😳)
Great car to drive and just eccentric enough to stand out in a sea of jelly bean SUVs.

Currently running a 91 780 with M90 and a 960 rear end. Great car for long drives.
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Old 05-15-2020, 07:59 PM   #23
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There might be a chance that I will end up with a 780 that I have owned three times. The radiator broke and he didn’t notice the pegged temp gauge. Autopsy scheduled for tomorrow.
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Old 05-16-2020, 06:59 PM   #24
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The radiator is a after market part. The fitting for the coolant tank broke. This one threaded in. Checked compression and all was ok. My brain was working over time on how to trade him out of it if the motor was fried. Rats. Maybe next time-
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