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The TR250 I am rebuilding to an ordinary road car, with minor improvements like 

TR6 cylinder head, rebore, crank to be polished, new pistons etc etc but as for carbs, I believe the rule of thumb is to use H6 SU carbs, now the Stromberg carbs I have

are in good nick so  why are SU's preferred, how much more BHP are the SU's making?

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In my view the SU’s are usually preferable due to the large range of needles available to accompany other engine and breathing mods. Of course, you may have a set of Strombergs that are already set up to suit your motor so you could save yourself a few quid. Stormbergs just need the occasional check of the diaphragms as well.

…… Andy

Edited by AndyR100
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Hi Pete,

in the early nineties I changed the Strombergs for SU’s, but it made no difference, needless to say I was disappointed. It may have been a needle issue, but car ran ok.

Others will have a more fresh and hopefully better experience.

Waldi

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