hey guys just rebuil my 72 clubby... its got a 1275 stock with mk 1 head with a bit of porting to go with that, twin 1 3/4inch su's, cooper s gearbox in her... pics to come on the weekend. its tiger mica gold with silver stripes bought from sydney last feb.

Diz combo will fly bro!!!
U'll beet all sortz a carz on da road wiv it!

Dey wont no wat hit em wiv da gold paint bro

ok ill rephrase this... what ballpark figures do you think this will put out? i no the gearbox doesnt make a difference i just thought id tell yas what it had done

Well I'd say it would have not much more power than a Cooper S did...

Tiger Mica you say? It will haul ass in that colour!

Twin 1.75s? Isn't that a bit much?

I've got a feeling a previous owner of this car was after info on it on ausmini about a year ago but can't remember his name , at least if it isn't this one it was one with the same paintjob . I'll see if I can find it .

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yeh i do believe he was. we could buy the 1/34 inchs for the same price as the 1 1/4 inchs so we thought why not we can always change the needle...its also a pommy block.not that this helps the performance just giving specs.

You can change the needle but can you change the air velocity?

I think it would work better with one 1¾ or two 1¼ but not two 1¾.
Big is not always better.

put it on the dyno

A dyno is not the real world.

IIRC having that much airflow capacity will give you a really free breathing top end, but you may pay for that in poor torque and low-RPM response. Unless you're building a race car, twin 1-1/4's are unbeatable in my book.. the only way to fly

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Simon

The adventures of an owner builder in the Tallarook Ranges

What kind of cam do ya reckon it's got?

That might be able to give a better estimate of what's going on.

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

yeah i agree with others, twin 1 3/4's sounds a bit much for what you've described

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real men race downhill - keiichi tsuchiya

put it on the dyno and get it tuned with the twin 1.75s'


also get a power output..

should go alright, it is a bigblock after all..

I've seen a race mini with a 998 and twin 1 3/4's , defintiely not feasable for road duty as it barely ran below 4,000 rpm but over that was scary all the way to 8,000 rpm . A standard 1275 with mild porting on the other hand might be a bit over carbed , it'll run and want to go faster than the valves will allow but you're likely to lose out in the lower revs . Still , drive it and have fun , that's what it's made for .

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