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1 1/2 carb on 1100 engine?
https://www.ausmini.com/forums/viewtopic.php?f=2&t=94287
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Author:  jacet [ Fri Nov 25, 2016 6:39 pm ]
Post subject:  1 1/2 carb on 1100 engine?

Hi all

Just a quickie, i have a stock 1100 with a 1 1/4 su, can i put a 1 1/2 on there with extractors and bigger exhaust. just that one person is telling me yes and a friend is saying 1 1/2 is too big. I was sure some 1100s came out with them.

Anyways the only reason i thought i would is i have it on the inlet manifold, and the 1 1/4 one on the car will have to cut the manifold to put the extractors on.

thanks :) julie

Author:  goodie [ Fri Nov 25, 2016 7:53 pm ]
Post subject:  Re: 1 1/2 carb on 1100 engine?

Yes you can , also an inlet manifold for an 1-1/2" shouldn't be to hard to find .

Author:  michaelb [ Sat Nov 26, 2016 3:19 pm ]
Post subject:  Re: 1 1/2 carb on 1100 engine?

Yes it is a common upgrade to give 1100 and 998 a bit more power.
Next step would be to have the head ported and a mild cam

Author:  Bill B [ Sat Nov 26, 2016 4:09 pm ]
Post subject:  Re: 1 1/2 carb on 1100 engine?

1-1/2" HS4 was fitted standard to 998 and 1100 automatics to give slightly more power. There was a cast iron factory inlet/exhaust manifold to suit. Should also make it easy to know the correct jet needle (DL for 1100 autos).
Long centre branch extractors (not too large in diameter) and an 1 3/4" exhaust were the most effective bolt-on mods I did.

Author:  jacet [ Sat Nov 26, 2016 4:35 pm ]
Post subject:  Re: 1 1/2 carb on 1100 engine?

Thanks Bill

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