Has anyone used them? Are they any better than Holley or Edelbrock? Just interested since I need a good carb to go on my ZZ4.

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor
-Rapidfire Plugs-Pablo's Free Mods-265/50/R15 Tires-Emmison's all Gone

http://hometown.aol.com/J007Golden/index2.html

 

they are unquestionably better. Every dyno test I have seen of them provides more HP than a standard holley and better BSFC numbers. I have a race demon (not the removable sleeve version) and it is a very good carb. You should consider one of the speed demons for a stock zz4.

 

Well it won't be stock. See I am swapping most of my mods over onto the ZZ4. Like the open element, pulleys, headers, wires, ect...Then for my exaust I have a custom 3" exaust w/ no cat and flowmaster 80 series. So it will be well modified. Should I still stick with the Speed Demon carb after that?

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor
-Rapidfire Plugs-Pablo's Free Mods-265/50/R15 Tires-Emmison's all Gone

http://hometown.aol.com/J007Golden/index2.html

 

I would. Most of your mods are the standard things a ZZ4 needs anyways. They really need good flowing exhaust to make hp. Look at this page http://www.gpt300.com/demoncarbs/speed_.htm

The 1282010 and the 1402010 are both double pumpers. If you are planning on using at least a 2000 stall converter the 1402 would be ok. I think you will get better gas mileage and throttle response with the 1282 otherwise. Actually, if you have the hood clearance, I would go with the 1282 carb and use a 1 inch open spacer. That will increase the high rpm hp a little.

If you plan to change heads or the cam in the future a race demon would be a better choice. The race demons have 4 corner idle circuits, screw in air bleeds, and other mods to make an engine respond well with a big cam. The race demons are about 400 bucks more than the speed demons.

 

I bolted one on after taking off the Edelbrock 750cfm. Noticably better carb all the way around.

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350 4 bolt main, Speed-O-Motive 383 stroker kit, re-sized rods ground for clearance,Hypereutectic pistons,9.8:1 compression,HPC Coated RPM intake, Speed Demon 750 cfm carb,World Products Sportsman II heads,2.02/1.60 valves, K-Motion springs, Comp Cam 1.6 roller rockers, Lunati adv.292/230@.050 with .512 lift,Crane pushrods,Proform HEI and MSD6A box,HPC coated 1 5/8 headers, 2.5" exhaust with 40 series mufflers,TH350 with B&M 3000 stall, Powertrax NoSlip Locker, 4.11 gears.

 

check this my man http://cgi.ebay.com/ebaymotors/aw-cg...item=460659785

 

Thanks man, but that auction just ended. I would rather buy it from Demon Carb themselves for that price. Well these Demon carbs sound pretty nice. I think that is what I am going to go with. Thanks guys.



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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor
-Rapidfire Plugs-Pablo's Free Mods-265/50/R15 Tires-Emmison's all Gone

http://hometown.aol.com/J007Golden/index2.html

 

I ran a Speed Demon 850 DP all season on my race car. Other than playing with jets and squirters and pump cams the only other thing I had to do was install jet extensions on the secondaries. It's a nice carb to work with. A Holley HP carb is actually better but also costs more $$$.



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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car and knocking on the SuperPro ET class
383 stroker (carbed) with double hump cast iron heads and pump gas
LS6 Big Block buildup now in progress

Best results before the engine blew up
Best ET on a time slip: 11.857
Best corrected ET: 11.163
Best MPH on a time slip: 117.87
Best corrected MPH: 126.10
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!

Member of the Calgary Drag Racing Association