289 carb/intake upgrade question
Hi everyone,
I bought a 68 fastback with a 289 about a month ago and although there is a lot to be done on the car before upgrading the engine, I am having a hard time with the fact that my sky activ mazda 3 is putting it to shame, acceleration wise. Now, I totally understand that its normal for these engines to generate more noise than speed but it would be nice if I "felt" the acceleration a bit without cutting the gas mileage in half :). I was thinking about putting a bigger, better carb and intake since these are not very expensive parts but I have to be honest, I dont know much about the smart way to upgrade an old engine and I could use some advice. My idea was to put a 4 barrel carb with 600cfm with a dual pane intake and I was wondering if that would make a noticeable difference on the power output. Thanks for your time, anything will help at this point...even other upgrade ideas :o) |
Originally Posted by Fugu72
(Post 191976)
I am having a hard time with the fact that my sky activ mazda 3 is putting it to shame, acceleration wise.
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A 4 bbl alone will maybe add 25 hp. I expect you have a 2.80 rear gear ratio (3.00 at best) A rear gear change would make more seat of the pants increase in feel but the carb and intake will look better.
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If it is an otherwise stock 289 2-bbl engine, I would say go with a 500 cfm 4-bbl Edelbrock carb and a Performer intake. Suggestion for gears is a good one too, but without an OD trans, anything steeper than 3.25 ratio gets pretty buzzy on the highway.
cheers Ed |
Hi guys, thx for the help. This is exactly what I needed to hear. I was actually looking at the Edlebrock peformer intake and carb on mustangs unlimited, so im glad to know I was heading in the right direction. I dont know the final ratio on my car but it is pretty buzzy on the highway, that I noticed he day I picked it up. I plan to eventually switch to a manual transmission so I think Ill leave the trany alone till then. :o) Again thank you for your input, gives me something to shop online for haha!
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