delux
Part of things
There's treasure everywhere!
Posts: 531
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Jan 12, 2017 18:36:03 GMT
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Hi
I'm looking into turbo charging a Talbot 2.0 Petrol engine with a solex carburettor that currently pushes a motorhome along at a leisurely pace but want to help it along a bit especially up hills with the whole family on board. Compression ratio is only 8:1 so there's room to boost.
Someone has raised a concern because the brake booster takes its vacuum from the manifold.
Is that an issue and how can I overcome it?
Any other knowledgable advice would be welcome.
Thanks
Steve
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Jan 12, 2017 18:42:47 GMT
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One way valve
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Jan 12, 2017 19:13:44 GMT
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It should have a check valve anyway..
Id cross that bridge if it apears....
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Last Edit: Jan 12, 2017 19:14:52 GMT by usedabused
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Jan 12, 2017 21:14:48 GMT
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most petrol turbo's manage without, if it becomes a problem you may be get away with adding a vacuum tank otherwise it would be an electric vacuum pump or engine driven one(transit used one on the back of the alternator but it needs a oil feed and return.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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most petrol turbo's manage without, if it becomes a problem you may be get away with adding a vacuum tank otherwise it would be an electric vacuum pump or engine driven one(transit used one on the back of the alternator but it needs a oil feed and return. Does it? (Oil feed) |
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delux
Part of things
There's treasure everywhere!
Posts: 531
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Cheers chaps. At the moment the vacuum pipe runs directly from the intake manifold to the brake booster - no check valve. Very simple setup usedabused. avengertec can you show me an example of the kind of one way valve you mean? |
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froggy
Posted a lot
Posts: 1,099
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Jan 13, 2017 11:29:12 GMT
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Check valve is in the bung going into the servo . It wouldn't be able to store any vac without it
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Jan 13, 2017 13:08:16 GMT
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Cheers chaps. At the moment the vacuum pipe runs directly from the intake manifold to the brake booster - no check valve. Very simple setup usedabused. avengertec can you show me an example of the kind of one way valve you mean? What I am saying is don't worry about it,do the turbo conversion leeve the current vacuum set up the way it is anf see what happens.. I'll bet you a quid you wont have to touch it. You can always fit a check valve if it becomes an issue |
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delux
Part of things
There's treasure everywhere!
Posts: 531
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Jan 15, 2017 22:13:28 GMT
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I think you're right. Parts will need to be collected now to mock this up over spring I reckon
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froggy
Posted a lot
Posts: 1,099
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Jan 16, 2017 15:18:43 GMT
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I would seriously think about all the other aspects like getting the carb to accept boost pressure without leakIng , getting the timing to retard under boost and finding room for an intercooler etc compared to fitting a different engine . If you've got the chops to fabricate a one off turbo setup that works an engine swap is going to be easy . I run a 5cyl Volvo turbo in my 91 Ducato camper so have some experience on this
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Jan 17, 2017 21:24:35 GMT
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Don't worry about the brake booster vacuum - Think about it, you'll never press the brakes while the engine is boosting. As soon as you come off the throttle the engine will generate plenty of vacuum within milliseconds.
It should probably already have a check valve, most stuff from the last 30 years does.
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hario
Part of things
S202 C300STD
Posts: 421 
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Perhaps get a check valve from a car which was OEM turbocharged because it will be designed for more pressure differential? Boost reference the float chamber on that Solex and you're good to go  |
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*S202 C300TD Wagon*
Installed:
OM606 & 722.6, Evo6 IC, S600AMG callipers & 345mm rotors. No catz. Leatherish seats.. Rust..
Future:
DIY manifolds & turbo compound build.
Built IP, & some kind of software. Less rust..
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