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Author Topic: New thermostat installation  (Read 453 times)
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rossocorsa
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« Reply #20 on: January 22, 2020, 09:04:08 PM »

Apologies if I've got the wrong end of the stick here, but wouldn't using the existing setup as fitted to carb engines (no in-head stat, standard branch off top water rail to OE stat) but with the VX takeoff to the head spigot near cylinder 4, do effectively the same job? You'd lose the ability to run a hot climate thermostat, but would benefit from consistent temperatures across the cylinder head water jacket.

Or am I missing something?

Yes that is an ideal factory setup. But as you say, no adjustability with different temp stats.
Thanks for that confirmation. So in an ideal world we'd be able to find a replacement for the OE stat housing that can be dismantled to change the thermostat element... ? I'd be surprised if something of that nature didn't exist, although I doubt that tracking it down would be simple. You might get lucky and find a cast item that fits the bill, but I suspect it's more likely that it would need to be machined from billet (and expensive).

I think they is nothing wrong with the factory layout and stat, I think it was Fiat that changed this as didn't early TC have in head stats? Why would they have moved to a more expensive layout with no benefit?
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WestonE
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« Reply #21 on: January 23, 2020, 09:30:11 AM »

They changed the layout for faster warm up lower emissions less engine damage from cars being thrashed before warm. BUT the temp in the OE stat is too high for a tuned car even with the 19 x 235 oil cooler that is essential on tuned cars. I will have no problem with the external set up and a cooler reliable thermostat. The VX/IE water rail bypass is staying I like my engines to keep working.

Cheers

Eric
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mangocrazy
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« Reply #22 on: January 24, 2020, 12:15:45 AM »

Does this look like it might fit the bill?

https://www.specialist-components.co.uk/index.php/shop/twinkam-16v-conversion/accessories/twin-kam-remote-thermostat.html

<Edit> Just realised that the flow and bypass ports in the housing above are in the wrong orientation/position. I think I'll give them a ring and see if they have anything suitable for Betas.
« Last Edit: January 24, 2020, 12:24:22 PM by mangocrazy » Logged

1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
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1988 Honda VFR750F
1980 Yamaha RD350LC
rossocorsa
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« Reply #23 on: January 24, 2020, 10:07:30 PM »

Does this look like it might fit the bill?

https://www.specialist-components.co.uk/index.php/shop/twinkam-16v-conversion/accessories/twin-kam-remote-thermostat.html

<Edit> Just realised that the flow and bypass ports in the housing above are in the wrong orientation/position. I think I'll give them a ring and see if they have anything suitable for Betas.

Used to use one of their housings on an MG ZT good quality, they made a few specially for the Rover75/MG ZT forum a few years back. I think it might do for what I'd want? Let me check the tech books
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mangocrazy
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« Reply #24 on: January 24, 2020, 10:31:48 PM »

I rang them up and spoke to a very pleasant lady about this query, and she suggested I drop them an email with some pictures and dimensions and they will see what they have available or what could be modified without too much trouble. So that's what I'll do.
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1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
rossocorsa
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« Reply #25 on: January 25, 2020, 12:37:43 AM »

I rang them up and spoke to a very pleasant lady about this query, and she suggested I drop them an email with some pictures and dimensions and they will see what they have available or what could be modified without too much trouble. So that's what I'll do.

They used to do the rover one which was much the same as shown but without the bypass pipe, that would be ok if you have a standard top pipe with the bypass in place, you could maybe use the stat in the rubber top pipe to rad (assuming diameter s are the right size .....)  then hollow out the original stat to make it into a connector only (if the insides are easy enough to access)
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squiglyzigly
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« Reply #26 on: February 15, 2020, 04:59:24 PM »

Update on homemade stat housing in top pipe. (Similar in principle to the inline Rover stats discussed but this version has a small take off which I have ‘T-eed’ into the expansion tank) this take off is necessary to allow a flow of water to the thermostat ‘bulb’ along the top pipe or the hot water from the head may never get to the closed stat. Something to consider with off the shelf inline stats without a bypass/bleed. You could drill a bleed hole in the stat itself but I reckon that will slow warmup.
So,
It’s installed and fitted with 82C stat.
Engine started from cold with Ambient temp of 6 degrees.
Engine warmed up to just below mid point within 2 miles of very gentle driving (police car behind) and then sat there for 20 miles of normal to thrashed driving.
Couldn’t of wished for a better first run.
Looking forward to summer so I can see if the results are the same, but if not, a 75C stat is waiting to go in.


* 663F019A-2871-4293-82BB-BB396206057B.jpeg (666.2 KB, 1512x1512 - viewed 39 times.)
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Beta coupé VX (completed April 2017)
Beta Saloon 2000 s2 1979 (in progress)
Aprilia RSVR 2002
Aprilia Tuono R (130 rear wheel BHP)
Alfa 159 sportwagon
mangocrazy
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« Reply #27 on: February 15, 2020, 10:28:14 PM »

Excellent work, Ian. Very much liking the home-brewed stat housing - lots of options. I can't see from the photos, but have you retained the lower smaller outlet on the top water rail, or had it blanked off? I'm guessing the latter, as that is the outlet which feeds the thermostat on standard unmodified S2 Betas.

And is the bracing strut between the shock tops an over the counter purchase, or something you had fabricated? Something along those lines is on my wish-list.
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1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
squiglyzigly
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« Reply #28 on: February 16, 2020, 10:30:26 AM »

Yes the smaller lower outlet has been blanked off although the top rail was originally a Strada 130tc/105tc regatta 100s assembly (can’t remember when I saved it).

The strut brace is more or less off the shelf. Originally Peugeot 309 with minor mods to fit. I have modded it some more with a removable 6 inch section (not in shot) just above the timing belt to allow easy removal of timing belt cover. I like making things easy to inspect/maintain, can’t stand unnecessarily removing unrelated components just to do a simple job. That’s when things strip etc and a simple job becomes a pain.

Unless summer throws up some expected results with the inline thermostat mod, it’s the only way to go for me now.

 RIP in-head stats.
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Beta coupé VX (completed April 2017)
Beta Saloon 2000 s2 1979 (in progress)
Aprilia RSVR 2002
Aprilia Tuono R (130 rear wheel BHP)
Alfa 159 sportwagon
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