Carb Size for 454 Mag
#1
Registered
Thread Starter
Carb Size for 454 Mag
Have decided to change out my Weber with a Holley. What size Holley should I go to on a 92 454 Mag?? 750, 800 ???
Thanks for you help.
Thanks for you help.
#3
Charter Member # 55
Charter Member
The 750 will have the best throttle response and is more than enough cfms. The Webers are 750cfm also. I had an 800-hp500 carb on my hopped up 454 mag that worked fine too though. No reason to go more than the 800cfm.
#5
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If it's a stock 454 Mag, I would run a Holley 750. If you plan to do a lot of mods in the future (cam, heads etc...) maybe an 800. I have a 454 Mag (.030 over - 460) they is really warmed over (cam, heads ported/polished) and am running an 850 (got a good deal on it), but feel it is too much carb for my application. Run's good at idle, cruise, and opened up, but has a slight stumble when getting on plain I haven't worked out as of yet. Thinking of trying an 800 this summer.
#8
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Thread Starter
Sheikman, e-mail me at [email protected]
give me your phone number and I'll give you a call.
Thanks Brian
give me your phone number and I'll give you a call.
Thanks Brian
#9
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Posts: n/a
I'll take $250 and I can set it up any way you want as far as jets and power valves. It has the secondary spring kit with the quick change housing and all the springs. Its off a 92 OMC motor so its painted OMC gray. It is completely rebuilt with factory parts. I ran it a few hours then got a smokin deal on a 750 w/mechanical secondaries. I didnt see any gain with the mechanical carb. There is nothing wrong with the carb, its like new. I can send you a pic if your interested.
#10
CBPBA's Walmart Greeter
VIP Member
I had Webers on my 454 Mags and they were bulletproof, 13 seasons like day 1, never any issues and great fuel mileage.
I have Holley 800's on my new 502's, all they do is load up and stumble. Need to find someone who really knows how to tune 'em. Why are you changing the carb? Just curious.
I have Holley 800's on my new 502's, all they do is load up and stumble. Need to find someone who really knows how to tune 'em. Why are you changing the carb? Just curious.
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-----------------------------------------
CHESAPEAKE BAY POWER BOAT ASSOCIATION
'http://www.cbpba.com'
"Experience is something you don't have until just after you need it."