Florida Members - carb tuner
04-11-2012, 11:02 AM
Finding someone that can tune a carb is like finding a unicorn. Does anyone know a shop or person in the Cocoa Beach/Space Coast area that can tune the Demon 750 on my C3 454? Considering this thing gets 8mpg I really dont want to drive too far but it really does need a good tune.
04-11-2012, 12:06 PM
I don't know from Demon carbs, but I can tell you I
see similar MPG on my heavy 400SBC Caprice and the
carb mixture is dead-nuts by the wideband. With no
overdrive and no EGR, this may just be what you have
to live with. It's also not out of line with other heavy
big-V8 vehicles I've had in the past (455 Olds 98,
390 Cadillac, 350 van, 383 Chrysler Newport, are a
few and none of them ran over 10MPG).
First step is probably just to put a wideband sensor
up the tailpipe and see if there's any need to change
Could be that you want to raise the power enrichment
kick-in rather than messing with base mixture.
04-11-2012, 01:25 PM
anything is possible. I dont know crap about carbs. you get the idle circuit right and the power valve is now wrong, get the timing dead on and the secondaries are too small. I have just the slightest hesitation when you go from idle straight to WOT. For a split second the rpms drop then the 500 ft/lbs of torque from the zz454 crate motor kicks in and we start doing doughnuts. I just want to get rid of that hesitation.
04-11-2012, 05:07 PM
you could talk to Vic at Brevard Cylinder Head, or the guys at SpaceCoast Auto on SR3 right north of the barge canal,
04-11-2012, 05:20 PM
the mpg is about right for the BBC iv had and seen
pete that builds my old engines is in palm bay, he may be able to help you, let me know, ill get you his number
there is also TJ off ellis road that has a shop with a dyno, called "trickpro"
04-12-2012, 10:16 AM
id definitely like that number. i have 30 days left in the middle east so as soon as i get back this is one of my projects.
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