kurupt

Which Edelbrock/Holley carb is ok to match up with an Edelbrock RPM/RPM Air-gap intake manifold for a 289? The Edelbrock site doesnt recommend using the Performer series carbs. I don't see many people on here using the Thunder Series either.

Mods are as follows, allby previous owner.

- holley intake (dont know which one)
- carter 600 (i think) carb
- Edelbrock RPM cylinder heads
- PO also changedto Comp cams and lifters(i have the boxesthey came in)

Not looking to buy any time soon, just wondering before I do. I'd prefer Edelbrock over Holley just cause I can get it cheaper.

Thanks

kalli

hmmmm why change the carb and holley intake?
can you get any info on what intake that actually is? maybe there's no point in changing?

deadcarnahans

Don't understand why a 500 or 600 cfm Performer series carb would not be ideal for an engine that size.
I find it even harder to believe Edelbrock does recommend using thier own line of carbs!
I'd use the 500 cfm #1401 on top of the Performer RPM on a 289

racin66coupe

we need one of these threads as a sticky. i see one nearly every week

my77stang

500 is too damn small, something in the 600 range should be good (570, 575, 600, 625) as long as its tuned properly.

groho

the Edel 1405 is 600 cfm, and has a richer jetting then the 1406, but the 1406 has an electric choke and is jetted for ecomony. I just rejetted my 1406 for about $20 and 2 minutes, to match the 1405. If your running a completely stock 289, including exhaust, then go with the 1401, 500 cfm. Don't forget the hard-line with the carb, it's a separate piece.

67_Mustang

Emailed Edelbrock and the guy that replied recommended the Thunder Series 1806. How is that carb? Its a lot more expensive than the Performer Series 1406. Don't really see many guys on here using Thunder Series carbs either.

Here's the Edelbrock link http://www.edelbrock.com/automotive_...erformer.shtml
Scroll down to the 1406 - 600 CFM electric choke. Description says:

"They are not recommended for use on RPM or Torker II intake manifolds. Match with an Edelbrock Performer or Performer EPS manifold and other brands of similar design."

Is this because its calibrated for economy maybe?? The 1405 (manual choke) is calibrated for performance. The description for the 1405 says:

"Match with a variety of manifolds that include Edelbrock Performer, Performer EPS, Performer RPM, RPM Air-Gap, Torker II and other brands of similar design."

silverblue66

unless its a solid lifter cam and you are spinning it above 6000 rpm or you have a cam with more durration and lift 500 cfm is just right anything bigger is wastefull and will hurt power and fuel economy.

kalli

still I don't klnow why swap. is there anything wrong with your current setup?
and yes, we should stick our heads together and write the ultimate intake and carb guide :-]


kalli

my77stang

silver the problem is most of the time driving your running on the front two barrels so your 500 is now a 250. add in a dual plane intake and each cylinder is only drawing from a 125 cfm barrel when its sucking air. this is why you can get away with a slightly larger carb than mathmatically required when using a dual plane intake with a vacuum secondaries carb (which is the combo MOST of us have).

not to mention even ford was using holley 600's on underpowered 302's in a variety of applications for years and years..... that should tell you something.