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I am seeking information on the mst effective carby for near standard 253 red. Is currently running 600vac sec holley but is really a slug. Was thinking of going to 2 barrel or standard 4bbl rochester.
Any help would be appreciated.
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Anything from a 350 holley, 465 holley or a quaddie should do quite well, the latter being a personal preference!
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The general consensus is to run a Quad/Rochester, jetted for a 253 ! I have a 350 Holley on one that works a treat in a 4 speed, and can get 27MPG on a run. I also run a Stromy too - argh !!! They work but gee they guzzle the juice in traffic. Check ebay
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Can anyone let me know the correct size of the jets for a 253?
Is it a big job to install them?
Rock n Roll |
Rock n Roll |
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A holley 4500 economiser is listed as best economy carb
for 253 in a book i have. I think its a 4bbl centre bowl carb
I found the stromy very thirsty hth
cheers chris
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All sugestions are good the only thing is a red 253 has a WW stromberg standard
Blue 253 has a 603 quad jetting is #70 thou jet, 49p primary needles , CX rear needles , list No 17059596.
jetting on a WW stromberg #50 thou
hope this helps
www.xtremef
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In my experience, the 465 holley is a good carby to use on the 253 as the primaries are operating under low throttle, and the secondaries only open under heavy throttle, so they can be - at times, better than a 350 holley which can also lead to better fue
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A vacuum secondary 390cfm Holley 4 barrel are also OK. I had one of these on a ski boat with a (shock horror) 351 Cleveland in it. Worked a treat, and was very economical plus heaps of low down grunt. Added bonus was it was on the secondaries whilst you w |
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so I take it from all of this that a 600cfm 4bbl holley is probably too much carby for a 253.
I will look into something smaller and see how thingsgo. I am looking for a good compromise between power and economy but I feel that a red 253 running premium
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How old is the engine? It is likely that the cam is worn out. Replacing the cam & lifters, using a timing set that you can dial in and a new oil pump (a must), plus HEI (blue/black V8) ignition will also liven it up a bit. 600cfm as a sqaure bore is reall |
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we have rebuilt 465 cfm street avengers $430.00 with electric choke or new $495.00 with manual choke you will also need a fuel rail $33.00 as these are dual feed bowls www.xtremefuelsystems.com.au
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