625 CFM Road Demon - too small?
Thread Starter
Pro
Joined: Oct 2000
Posts: 509
Likes: 0
625 CFM Road Demon - too small?
Will a 625 CFM Road Demon work well for my application?? Or do I need to go bigger?
355 CI, 9.75 Compression
Comp Cam 270 Magnum (224 deg. int/exh), Roller Rockers
Trick Flow 64 cc heads, Edelbrock Performer Intake
Dynomax headers - dual exhaust
4-speed with 3.36 gears
A/C coming soon!
Thanks for the advice (as always)!!!
355 CI, 9.75 Compression
Comp Cam 270 Magnum (224 deg. int/exh), Roller Rockers
Trick Flow 64 cc heads, Edelbrock Performer Intake
Dynomax headers - dual exhaust
4-speed with 3.36 gears
A/C coming soon!
Thanks for the advice (as always)!!!
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
Re: 625 CFM Road Demon - too small? (72Shark)
i always use the holley 6210 650cfm DP.
as far as i know it is the only low price 650 DP calibrated for street use.
it is a spread bore.
the choke could be milled off for an extra 25 cfm if needed.
Plus they can be picked up at swap meets for 15-45, add a $45 kit and you are set.
new about 329-379.
Demons are real popular due to the catchy name, advertising, and it is a good carb,
Holley gave up advertising the 6210 years ago i think because it is so hard to educate customers. They at least stand to profit, i don't so i will now let others convince you to buy something else
:lol:
[Modified by Matt Gruber, 11:03 AM 9/12/2002]
as far as i know it is the only low price 650 DP calibrated for street use.
it is a spread bore.
the choke could be milled off for an extra 25 cfm if needed.
Plus they can be picked up at swap meets for 15-45, add a $45 kit and you are set.
new about 329-379.
Demons are real popular due to the catchy name, advertising, and it is a good carb,
Holley gave up advertising the 6210 years ago i think because it is so hard to educate customers. They at least stand to profit, i don't so i will now let others convince you to buy something else
:lol:
[Modified by Matt Gruber, 11:03 AM 9/12/2002]
Le Mans Master
Joined: Apr 2000
Posts: 5,202
Likes: 10
From: cincinnati ohio
St. Jude Donor '09
Re: 625 CFM Road Demon - too small? (Matt Gruber)
I'm using a 4150 600 dp vintage 1965 and it works perfectly, crisp throttle response, plenty top end and holds a tune. I looked at the speed demon but can't imagine it working any better than this Holley :cheers:
[Modified by yellow 72, 2:15 PM 9/12/2002]
[Modified by yellow 72, 2:15 PM 9/12/2002]
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: 625 CFM Road Demon - too small? (yellow 72)
I'm using a 4150 600 dp vintage 1965 and it works perfectly, crisp throttle response, plenty top end and holds a tune. I looked at the speed demon but can't imagine it working any better than this Holley :cheers:
[Modified by yellow 72, 2:15 PM 9/12/2002]
[Modified by yellow 72, 2:15 PM 9/12/2002]
Drifting
Joined: Jun 2001
Posts: 1,809
Likes: 0
Re: 625 CFM Road Demon - too small? (72Shark)
I think it's too small, I know some 600 carb can be set to run over 400 hp but it seems like this carb is for smaller hp cars like around 350 and under.
Hopefully someone here will know the hp ratings for this carb. I'm guessing by your signature that you car is over 350 hp.
Hopefully someone here will know the hp ratings for this carb. I'm guessing by your signature that you car is over 350 hp.
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Drifting
Joined: Jun 2001
Posts: 1,809
Likes: 0
Re: 625 CFM Road Demon - too small? (72Shark)
That sounds like a good choice however I would go with vac. model. I know a lot of guys have good luck with the mec. sec. but I never have, in my opinion they are a little harder to tune.
[Modified by Tominator, 6:01 PM 9/13/2002]
[Modified by Tominator, 6:01 PM 9/13/2002]
