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Post Posted: Sun Nov 10, 2019 9:19 pm 
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Hey guys looking at upgrading the carby on my 1.3L sierra, what is generally the most common upgrade and what do people suggest? Cheers

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Joined: Tue Apr 20, 2010 12:00 am
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Post Posted: Mon Nov 11, 2019 12:55 am 
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Did you consider a search, this has to be one of the more commonly asked (and answered) questions - Toyota Corolla carb is the answer.

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Vehicle: Sierras!! SWB and LWB

Post Posted: Mon Nov 11, 2019 8:52 am 
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In the good tech section you’ll find some info on the 4K carby Fordem is talking about. All you need to know is there really. Some people go for a Weber copy which give a slight increase in power but they suffer on steep inclines. Might be an option depending on what you use your car for

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Post Posted: Mon Nov 11, 2019 7:31 pm 
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bumstein wrote:
In the good tech section you’ll find some info on the 4K carby Fordem is talking about. All you need to know is there really. Some people go for a Weber copy which give a slight increase in power but they suffer on steep inclines. Might be an option depending on what you use your car for


Yea I'll do some searching thanks. I'm going to be using it mainly for 4x4ing, nothing to hard but I would say a fair few hill climbs in the areas I go, so maybe the weber isn't the go. Is that the same with the corolla carb?

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Post Posted: Tue Nov 12, 2019 8:33 am 
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there is no need to upgrade the carby with another carby. Just rebuild the stock one. if you want more power go EFI

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Post Posted: Tue Nov 12, 2019 9:06 am 
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Jgladman wrote:
I'm going to be using it mainly for 4x4ing


Then I’d suggest not to go the Weber. They’re set up differently and will over-fuel on either inclines or declines depending on type. I’ve run a Weber on two Sierra’s. While they’re ok for highway, off road (and I’m talking about mild 4wding, not even difficult stuff) it was rubbish.

The 3k or 4K carby are cheap, simple and work well. I think that’s the go.

As Tanshi says, EFI is a great option however it’s a more difficult conversion. Up to you if you want to consider it, although if you’re looking at concerting ti EFI then why not convert to a G16B while you’re at it? Then the whole thing becomes a big project. $100 and a bit of time will have your car running great while you consider long term improvements like EFI.

I advise against rebuilding the stock carby. IMO they’re old, worn out and not worth rebuilding. I spent around $550 having a carby guru rebuild my stock carby and it still doesn’t run right. It was good for a while (not great, but good) but now I’m replacing it with a 4K carby that cost me $85 delivered. I should have done that it the first place I reckon

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