tommarow I'm going to order a Holly street avenger 570 cfm carb and a holly intake with a non egr. I'm also ordering a 1" spacer to replace the egr plate under the carb. and a 14" holly air cleaner is there anything I should know maybe a detail I'm overlooking. I have only started working on cars for about 2 years ago due to the fact I never had anyone to show me and everything I had to learn my self. Its a 4 door 73 mav. with a 302 and only 36,000 original miles. Any info would be great before I drop $600 dollars on the car. THANKS
I have yet to hear anything good about the street avengers. If this is a stock notor or close I would suggest an edelbrock.
I`ve heard that the edelbrocks arn`t as hard to tune, keep they`r tune longer and don`t need to be rebuilt as often.
570 is enough cfm, but for that application you may as well buy the cheaper 600 cfm. Since you have a 4 door, I am guessing you have an automatic tranny, so be sure to get a carb with the Ford kickdown. Also, get one with an electric choke.
If you're gonna drive it, the Edelbrock is the one I'd choose. For a race car, the Holley is hard to beat. Edelbrock carbs DO hold their tune longer, there are less parts to wear out, easy to tune, no gaskets below the fuel bowls to leak, better mileage (especially with the 600 cfm version) crisp throttle response, etc. I have a 600 Ebrock on my Mustang...gets about 30-32 mpg on a daily basis, driven easy, yet will still pull hard in every gear (except 5th....afraid to try that). I used to have one on the street maverick....but ever since playing with the turbo, the Holley was the carb of choice, and a 750 vacuum secondary is on there now, though it needs work. I can't speak highly enough of edelbrock carbs on a street motor....they work well. OH I did have a 870 truck avenger on my old truck...it was 'ok' but did require a lot of tuning to get it halfway right. It also ran better at part throttle and at low speeds with a 750 edelbrock, though the Holley made more power.
Agree with most every thing already posted, just bought a holley part# hly-0-80457s 600cfm, electric choke, ford kickdown, vacuum secondaries. I know it will give better performance than the edlebrock it's replacing but it will surely require more attention. that's the main reason I put edelbrock on was so my son and wife could drive trouble-free. Holleys "dry-out" if not used often and then leak. OR so I'm told, the double pumper on my race Pinto hasn't been apart since it was put on two years ago and it's only used on race days and maybe once a couple of weeks during the off-season to pull it in for maintenance.
There's a guy on ebay selling 670 avengers for $150. THey're used, but hardly. He's got a couple...definitely worth checkign out. 670 would not be TOO large, though you probably don't need that much CFM (but you might in the future, who knows!). As for holley's vs. edelbrocks, edelbrocks are easier to tune and keep in tune...a holley that is out-of-tune will make more power than a perfectly tuned edelbrock. Don't know why that is, but i'll be damned if i'm not the millionth person to say that.
Thanks for the info I ordered the parts last night I like working on the car so I think the holly should be ok. The description says it has really easy adjustments anyways. Do you think I will fill more power in the mav switching from the 2bbl to the 4?
"Do you think I will fill more power in the mav switching from the 2bbl to the 4?" LOL, isn't that why you are doing it?
well in other post people have been stating that the 2bbl is faster of the line than the four and I Don't Know a whole lot about preformance parts
Yes, a 2bbl will probably make more torque off the line, but a 4bbl will make more power throughout the powerband. A 4bbl carb is usually the first and easiest thing you can do to free up hp.
4v guarantee your stock engine will definitely benefit from an addition of new carb (4V) and intake. if its a 4 door and the engine is gonna remain stock internally, i wouldnt waste a lot of money trying to bolt on speed. i think an edelbrock performer is a really good intake for your application, and possibly the cheapest out there. i have a performer now, but am going to go with a weiand stealth when i go thru the motor. i started with a 500 cfm edelbrock, and it ran really well. i took a chance and installed a 600 cfm, and she really really ran well. i liked the idle characteristics better on the smaller carb. as for the holley vs edelbrock debate... everyone's giving you the straight dope. the edelbrock is more reliable. set it up, forget it. ive had a holley on a maverick, and it was really inconsistent. it was definitely faster, but it never maintained its tune. i never knew if it was gonna respond or gag. with the edelbrock, you know what your getting, every time. i prefer it to the holley.
