Vehicle & Technical > Range Rover

what does the dash pot do?

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Range Rover Blues:
Apparently SUs should have very little oil in them, they work ok with almost none, they work great when full, but half full they run rough :?

Used to tinker with A series a lot when I was younger.

And yes, basically the damper (or damper rate) controls fuel enrichment during throttle opening (transience) to prevent missfiring as you clout the loud pedal.

Rossko:

--- Quote from: "Range Rover Blues" ---Used to tinker with A series a lot when I was younger.
--- End quote ---


Y'know I almost mentioned the old "tuning" tweak of putting in thicker oil for more accel pump on A series!!  I think the advice is not to do that on V8 though, you shouldn't want to if the original design was right.

Someone knowledgable will remind us of the correct oil for V8 SU & Strombergs in a bit ...

cheers, Ross K

DEANO3528:
Over the years I think I've heard most of them, from 3 in 1 through straight 30 and ATF to 90 weight!
Truth is, they are supposed to run 20/50 engine oil and they run well on it.
You'll soon know when the oil level is dropping in the dashpots because the motor starts spitting back when you floor it as the resistance to the vacuum lowers.

anaxemurderer:
Always thought they wnated thinner oil than 20/50, will know for the future though. She is back to running very nice now!

Nick

Range Rover Blues:
SUs run fine on whatever the engine drinks, stroms are fussy and I know of a couple of applications where a thinner monograde was preferable.

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