Is 600cfm too much?

[rangerdoc 22]

For a 302 with a very, very mild cam and .030 on an Edlebrock Performer intake? I'm looking at getting a Holley 4160 for a good deal but I had originally planned on getting an Autolite 4100 and rebuilding it since it runs a little smaller.

[Powershift 19]

I think you would be fine with a 600. Yea, it may be more than you really need. But, it should work just fine.

[70Mach03 12]

Back in the day most people added the Holley 1850 (600 cfm) without problems. You may want to play around with the jets but I think you'll be fine.

[Mike65 476]

Back in the day most people added the Holley 1850 (600 cfm) without problems. You may want to play around with the jets but I think you'll be fine.

 

Back in the 80's when I had a 68 GT Coupe with a mildly modified 302 that is the carb I ran on it & it worked fine, I think you will ok with it.

[Pakrat 1,043]

Ditto, I'm running a 600cfm Holley on my slightly modified 302 and it works great. I've got the Weind Stealth intake, long tube headers and a not overly agressive but far from stock Cam. I was running all this thru a stock size aftermarket dual exhaust and when I install the 2 1/2" system it should be even better now that the exhale matches the inhale more.

[MustangChuck 16]

I was running a 625cfm Carter (Edelbrock) for a while. It was on a slightly modified 302 engine (0.040 over, 10:1 compression) running '68 heads with long tube headers (1 5/8" primaries to a 3" collector with 2 1/2" tubes). That ran much better than the Holley (1850) I had previously. I plan to reuse the Carter when I get the engine running again (if it is not salvageable, I will get a remaned 600cfm Edelbrock).

 

M/C

[MAD IN NC 21]

on the old motor 351w .030, I dropped the holley, tried another holley copy cat and finally went with Edlebrock 580CFM carb. No rebuilds, no float adjust and it ran like a beast!

 

then I stroked it - back to holley ~750 CFM and now fighting the dead spot due to vacuum secondaries - which will be corrected in the spring.

[rangerdoc 22]

Thanks guys. I figured it was ok, just wanted to make sure. Anyone have any experience with the 4160? It says it doesn't use a float, just a needle/seat set up. Sounds like that would allow for better tuning.

[rangerdoc 22]

Bump...any opinions on the 4160 and its needle/seat set up vs. the traditional float?

[Powershift 19]

It's not that it doesn't have a float, it's just non-adjustable, and is set at a pre-adjusted height. It sounds like a good idea, but I don't know anyone who has one.

[rangerdoc 22]

Ah, that's what it means. Trying to get a good description off the web is difficult. There is an adjustable version and a non-adjustable version. I'm not sure which is best for non-racing car. I just want to enjoy the car and have reliable starts and performance.

 

I'm also debating this 570cfm from Holley.

http://www.holley.com/0-80570.asp

[Powershift 19]

I think that 570 might be a good choice for you. The slightly smaller CFM won't hurt, and there is the option to adjust the float level should it be needed. The fixed float in the other one seems like it could become an issue should the level not be quite right for your application. You will probably be lucky enough to just bolt the 570 on, and drive away.

[70Mach03 12]

I have the 670 CFM Street Avenger version on my 351C-4V Mach 1. The Street Avenger Series is a great carb. I did go back and richen up the jets a bit as I felt it was too lean. But it's pretty straight forward and I like mine. I would think the 570 CFM would be perfect for a mild 302.

[rangerdoc 22]

The more I'm reading on it the more I am liking it. Good to hear it worked for you. I like having the ability to adjust things if needed. There is a used one on ebay for $175. It is 3 years old and was on a chevy. But I can get the Ford a/t kickdown and other parts pretty cheap.

 

I know once I get my new heads and tri-y's I'll really get to appreciate the carb.

[prayers1 153]

I just put a Holley 570 CFM Avenger Carb and a Weiand Street Warrior Manifold on a 289, bored .60, 54cc heads, 194/160 valves, Comp Cam 512 lift and long tube headers and it screams. I never thought a smaller CFM would work, but after giving my specs to the guys at Holley thats what they recommended.

 

I originally had a Holley 600 DP and a Edelbrock F4B Manifold. The new system blows the old away.

Edited December 11, 2011 by prayers1

[jholmes217 65]

I have a 600 cfm Holley on mine and it runs fine. I've tried the Summit carb also, and I like it better than the Holley!

[rangerdoc 22]

I just put a Holley 570 CFM Avenger Carb and a Weiand Street Warrior Manifold on a 289, bored .60, 54cc heads, 194/160 valves, Comp Cam 512 lift and long tube headers and it screams. I never thought a smaller CFM would work, but after giving my specs to the guys at Holley thats what they recommended.

 

I originally had a Holley 600 DP and a Edelbrock F4B Manifold. The new system blows the old away.

 

That's pretty close to the setup I'm working toward, though I don't have that much cam in mine and I doubt I'll go with long tubes. While doing all this reading about carbs I've seen some good write-ups about the weiand intakes. This is the one I'm looking at.

 

http://www.holley.com/8124.asp

[prayers1 153]

1969 Mach 1, told me about the Weiand Street Warrior. With todays technology, Weiand did all kinds of test and comparisons, theres no way your gonna beat that!

There's a lot of die hards out there that stick with the Shelby stuff, but Shelby didn't have this type of technology way back then. That coupled with the 570 Avenger is hard to beat. Plus, with the 570, Holley gives you a couple of springs to make adjustments. I didn't have to, I just used it out of the box.

 

I also bought my stuff on StreetsideAuto, they beat everyones price, plus no shipping cost and they give you a coupon for 10% of your purchase, So one day you can order the Carb then you can apply the 10% credit to the Intake. The credit comes in an email 2-3 days after your purchase. I hope this helps!

[rangerdoc 22]

Thanks for the info. I haven't heard of Streetsideauto before. Man, I can't wait to get going on this project.