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Old 03-29-2003, 06:19 AM
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Post 289 tunnel ram question

Hello all. I've got a question dealing with tunnel ram set-up. I've picked up a '23 t-bucket with a '67 289 HI-PO. It's currently got an Offenhauser 360 tunnel ram w/ dual Holley 650's, so I have the classic "over-carbed, smoke you out at a stoplight" problem. I just cruise the thing, no racing, seems to run fine. I just want to put a couple smaller carbs on it. I'm not concerned with mileage or low end torque. What are your suggestions for carbs? So far I've heard Edel. 500, Holley 390, And Holley 450. I don't know the pro's and con's. Any help would be greatly appreciated. Thank You.

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Old 03-29-2003, 06:32 AM
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every edelbrock carb I have installed on my cars, 3 different cars, they worked great right out of the box, and they are shiny too! A holley may give you better performance but you said your just cruising. With 2 4s I don't see how you could get them too small. I don't know how small they make them but 300 somthing times 2 still adds up to a lot. I'll vote for edelbrock!
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Old 03-29-2003, 07:07 AM
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[quote]'67 289 HI-PO. It's currently got an Offenhauser 360 tunnel ram w/ dual Holley 650's<hr></blockquote>



<a href="http://www.ponycarburetors.com/calculating_cfm.htm" target="_blank">-Calculating Carburetor CFM-</a>

[quote]What are your suggestions for carbs? So far I've heard Edel. 500, Holley 390, And Holley 450.<hr></blockquote>

You need the HOLLEY 390's for appearance and performance.
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Old 03-29-2003, 12:10 PM
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I ran a Hi-po 289 for years and it had a pair of Carter AFB's (still available as that or the Edelbrock version)about 500CFM each (working progressively)on a Cobra Dual Quad intake and it ran flawlessly, never needing any tinkereing and got excellent mileage when my foot wasn't in it. I've run dual Holleys as well and while they worked fine after tuning (power valves,jets,etc.)I would run the AFB's if I want an unflappable street system. Shelby ran them on the earlier 2-4 set ups and having run both types I'd say the holleys may have made more overall power (not proven) the AFB's had much crisper driving characteristics.
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Old 03-29-2003, 05:09 PM
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Run 2 500 CFM Edelebrock carbs with progressive linkage, that is what I currently run on my 1966 289. I don't have any problems with it at all and I get 20-22 MPG, if I keep it under 65MPH.
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