(Login akredneck8) Members from IP address 65.74.19.37
I need a little help. I have a 1962 olds and I am going through the 394 engine. Bored 10 over and has a performance cam. I also have a old Offy 2x4 intake I want to run. The engine has 10.25 to 1 compression. I was wondering what size carbs I should try to get for the 2x4 intake. I have a set of 750 edelbrock that are set up for a 2x4 system that I can get ahold of but am thinking that that may be to much carb. I was thinking more like 600s. Any info or insite would be appreciated.
Thanks Shane
does the intake have a plenum, two plenums, or is it individual runner?
an IR intake will tolerate and needs much more carb than a plenum intake. if it is a plenum intake, is it divided, or split like a dual plane? a divided plenum will tolerate more carb than an open plenum.
"Enlightened statesmen will not always be at the helm" ~ James Madison
might have to wait till you have it in hand to see what that intake's doing, there may* be a guy around that might know though, and he'd probably be able to suggest what carbs to use also... let's see if he'll pop in...
"Enlightened statesmen will not always be at the helm" ~ James Madison
it divides the manifold right in half, #1 to #4 is one bank, #5 to #8 is the other. One of my Offy catalogs states you should use a 550-600 cfm carbs, 750 would be a race only setup, you could use smaller carbs on the street as well.
a lot of 'fill in the blank' info still missing on your combo to really have any idea what carbs would even be a good starting point.
what's the rest of the combo look like, what kind of RPM is it built to run? cam, rear gear, converter/stick, any special trans ratios, car weight... i'm gonna guess a 62 Olds is on the heavy side?
depending on the whole package, a pair of 390's might be a lot or it might love every bit of the 750's...
'somebody' suggested that the secondaries could be de-activated if you find yourself with too much carb.
"Enlightened statesmen will not always be at the helm" ~ James Madison
This manifold has a divider that runs from the front to the back down the middle, It has two small maybey 1 inch square holes in the divider to allow a little flow from right to left. I will be running a stock cam in this engine since I can't find anyone that makes an aftermarket cam. The pistons are 10 over with a 10.25 to 1 compression. This engine shoudn't ever see over 6000 rpm. Now the decision is what type of carbs. Should I go with matching carbs with chokes front and back or do I go with a set that is set up for dual quad? Manual or vaccum secondaries. I am not at all a carb person. Any help will be appreciated. Couple of more things that may help. Car wight about 4200 (big boat) got too love them. Automatic hydromatic (NO TORQUE CONVERTER) that should throw some people off. 2.83 stock gears out back with an open diff. Original rearend and gears. This is more for cruising and enjoying than racing, however I do like to tear it up once in a wile and I will run it out on the track on run what toy brung day.
Thanks Shane
This message has been edited by akredneck8 from IP address 72.35.114.198 on Jun 3, 2009 6:54 PM
the ad says these are new(not NOS) and are being made in the USA, maybe if you contact Falcon Classics they can get what you want?
~what is~ the difference from the newer Olds cams and the 59-64 ? are the bearing journals the same diameters? maybe just an oil hole drilled through? or is the difference so much that a 65+ cam can't be retro'd to work in the 62? what's the difference in the Starfire cam, higher HP?
These are the stock duration cams. I have talked to this company before. They are a stock cam for the Starfire with 10.5 to 1 compression. I have two stock cans for the 10.25 to 1 compression engines already and will be running one of them.
Thanks for trying to help
