Re: [Chevelle-list] Carb Opinion
Random thoughts: As engine components go, carbs are relatively inexpensive and easy to replace. Start with the 750. If it's right, you can stay where you are with a great running engine. If it's wrong, it'll still be strong off the bottom, and you can drive it happily a few RPMs off peak until you save up your nickels to go bigger. On the other hand, if you start with the 850, and it's too much, your engine might run badly at all RPMs, forcing you to go smaller, immediately. Steve On 7/13/04 5:54 PM, "rocky hill" <[EMAIL PROTECTED]> wrote: > There is a reason that there are formulas that will > determine the amount of air flow for a specified RPM. > One thing is for sure, if your car only needs a 750 > and you get the 850, your just spending more money on > something that wont make your car go any faster. > bigger is not always better. > > > Rocky > > = > A Man And His Chevelle, > It's A Beautiful Thing!! > > Mid America Chevelle Club #220 > Team Chevelle #1530 > MY66SS http://www.geocities.com/rocks66ss > > > > > __ > Do you Yahoo!? > New and Improved Yahoo! Mail - 100MB free storage! > http://promotions.yahoo.com/new_mail >
Re: [Chevelle-list] Carb Opinion
There is a reason that there are formulas that will determine the amount of air flow for a specified RPM. One thing is for sure, if your car only needs a 750 and you get the 850, your just spending more money on something that wont make your car go any faster. bigger is not always better. Rocky = A Man And His Chevelle, It's A Beautiful Thing!! Mid America Chevelle Club #220 Team Chevelle #1530 MY66SS http://www.geocities.com/rocks66ss __ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail
Re: [Chevelle-list] Carb Opinion
At 08:26 PM 7/12/2004, you wrote: Ok, I have a question... Asking this is probably asking who to vote for in the next election, but what size carb do you think I should run... The ad says to "top it off" with a 750. I guess that's what was on it when they dynoed the motor. I didn't think Holley made a 850 cfm with vacuum secondaries. Double pumpers (4150 series) can work good, but they can be a pain to tune. The vacuum secondary carb will probably give you better mileage (you probably don't give a hoot about that) and is easier to work on. Just my .02 BL
[Chevelle-list] Carb Opinion
Ok, I have a question... Asking this is probably asking who to vote for in the next election, but what size carb do you think I should run... I am hopefully going to install my 502HO engine in the next month. I emailed Holley, and I emailed Demon for their opinion. What I thought would be the deciding factor as both appear to know what they are doing ended up making me more fustrated. Holley says 850 Vacuum Secondaries with choke. Demon says 750 Vacuum Secondaries with choke. http://www.gmgoodwrench.com/perfparts/images/parts/pdf/12568778.pdf That is the engine specs, and cam information in the link above. I'm torn. I guess it's a guy thing, and of course I want an 850 (bigger is better right? LOL) , but I remember my Father-In-Law's 383 ran much stronger off the line with a 600cfm (loaner) carb than the 670 street avenger we put on. This car will be an occasional drag strip car, so take that into account. Also I live in Louisiana, which tends to be very hot and humid most of the year. Here's a CFM calculator that supports the 750 http://www.smokemup.com/auto_math/airflow.php But a few issues back of chevy rumble magazine, they had a 'drag formula' that slightly overcompensated and usually produced a number over 850 for this engine. Who knows??? Thanks Charles --- Check out my 502 powered '65 Malibu Super Sport Project http://www.65ss.com
