1. If you have recently registered with a gmail email address, you must contact me, as gmail will not forward our confirmation email to you. Contact me and jim@trishieldperformance.com to complete your registration.
    Dismiss Notice
  2. In and effort to reduce the spam on the site, several years ago I had went to a program where I manually approve each and every new registration. This approval gives you full access to the site, to pictures, and to post, among other things. To be able to enjoy the full potential of the board for you, you need to be fully registered.. and that's easy.. Just send an email to me at jim@trishieldperformance.com and I will verify your registration. This policy will remain in effect indefinitely, as it has completely eliminated the bad actors from our site, who would spam and hack it, once they gained access. Thanks JW
    Dismiss Notice
  3. The "Group Buy" for the 1967-68 Deluxe Steering wheel recasting is now officially "Open". Now is the time to start sending in the wheels. The latest date that the wheels must be received by Kochs is 31 March 2025 The cost for each wheel is $750. The only "up front cost" is your shipping the wheel. If you send in more than one wheel, each additional wheel will cost $700. Shipping and insurance to Kochs and return shipping will be extra. You will be contacted by Teresa to make payment for the wheel(s) and return shipping and insurance when your wheel(s) is complete. The shipping will be factored on your delivery address and insurance. I will be sending the contact information all of you have sent me to Teresa at Kochs. Send in your wheels, horn pad and hardware and paint color sample if applicable. Please include: First and Last Name Shipping Address Phone number email address V8Buick "Member Name" Wheel Color (SEE THE BOTTOM FOR WHEEL COLOR) Pease read the "shipping to Kochs" below. There are two addresses. One for USPS Mailing One for FedEx and UPS shipping You can use USPS/Mail, UPS or FedEx to send in your core. Use the appropriate address depending on what service you use to ship. If you use USPS/Mail ship to: Koch's P.O. Box 959 Acton, CA 93510 Attn: Teresa If you use UPS or FedEx ship to: Koch's 7650 Soledad Canyon Road Acton CA 93510 Attn: Teresa Kochs Contact: Teresa (661) 268-1341 customerservice@kochs.com Wheel Color If you wheel is Black, you can list that in your information you send in with your wheel. For colored wheels, please contact Teresa about specifics for wheel color if you do not send in a color sample to match. Please contact me if you have any questions. Thank you to everyone for your participation in making this a reality. And "Thank You" Jim Weise, for allowing and facilitating this project! Michael .................... to remove this notice, click the X in the upper RH corner of this message box
    Dismiss Notice

Which Edelbrock to get for stock 430?

Discussion in 'Other' started by acaciaavenue, Feb 24, 2010.

  1. acaciaavenue

    acaciaavenue Chopsocky Champion

    Let me preface my question with the statement that of all the years I've dealt with Q-jets and Holleys, I simply prefer the Edelbrocks because I've always had good luck with them, so I'm going to stick with it. I'm looking at the Performer series, but I am unsure of getting the 600 (1406) or the 750 (1411). Or should I step up to the AVS, which has a 650cfm model (18069)

    I read in another thread that a guy didn't have good low-end with his 750, but he was also running a single plane intake. I will be upgrading to a Performer intake at some point soon - but the carb comes first because my existing Q-jet is hemorrhaging gas. The engine is stock, and all I'm really looking for is to pick up a little performance - mileage really isn't an issue where I live.

    Thanks in advance for your input!
     
  2. acaciaavenue

    acaciaavenue Chopsocky Champion

    Ok - let's say I don't want to discount the Q-jet entirely, if you have any input about a rebuilt Q-jet, please include that. I live in a relatively small town, so the odds of someone rebuilding the carb who "knows what they are doing" are pretty slim. But with the right arguement, I suppose I can be open to buying a rebuild Q-jet, too.
     
  3. Cliff R

    Cliff R Well-Known Member

    I've tested the Edelbrock carburetors extensively, street, dyno and at the track.

    The AFB clones are useless, IMHO. They lack any adjustment for the opening rate of the secondary airflap. They are calibrated for SBC engines (or any other low torque engine) pushing around relatively heavy cars.

    The support for them is excellent, so tuning them in is NOT a problem. The problem is that you can not tune them for a smooth transition onto the secondaries.

    Also keep in mind that the AFB design was obsoleted in 1967 because it would NOT pass emissions. They are going to be thristy units in comparison to Q-jets and TQ's.

    I would also add here, that if anyone is paying attention, the AFB clones are most popular with the SBC crowd. This is marketing more than anything else, backed up by page after page in the popular HP magazines about how many zillion HP they will make on Westech's dyno sitting on little tiny engines with "modern" heads and "whiz-bang" cam profiles in them. The enthusiast checks them out, and finds out for less than the price or completely/correctly rebuilding his factory q-jet, he can buy a new carburetor and an aluminum intake. Cripe, the intakes don't even make any more, if as much power (average) as the factory SBC iron ones, but it's enough to sell about 20,000 of them a month....FWIW.

    Anyhow, Edelbrock is fully aware of the shortcomings of the AFB clones, so they gave it an AVS airdoor, which is adjustable. BIG improvment for them.

    In actual testing on my own vehicle, and another one vehicle donated by one of my customers, we flogged the Edelbrock units to death at the track on a private track rental.

    Tested a total of 8 carburetors on two cars. The AFB clones wouldn't work at all, period. They just "puked" all over themselves anytime we went quickly to full throttle, then ran fine once the engine recovered. No way to correct this as their is no adjustment, or accl/POE system for the secondaries.

    The AVS unit was much better, but required a LOT of spring tension to avoid a lean condition (puking all over itself) on the starting line. This occured moreso with my low 11 second car than the low 12 second car we also tested it on.

    We ended up getting clean runs with the AVS clone, and it was the slowest of the lot by .08 seconds and down 2mph over the next closest unit.

    My advice, completely/correctly rebuild the Q-jet, calibrate it EXACTLY for the application. The fuel inlet location is correct, choke, linkage, vacuum fittings, etc for the application.

    There isn't an aftermarket carburetor out there than will make more power, and none of them will equal the efficiency for "normal" driving.....Cliff

    PS: Some of our back to back testing was witness (and requested) by representatives from some of the HP Magazines. Since my lowly 1977 Q-jet outran every other type/make/model of aftermarket carburetor we tested it against, dyno and at the track, you will NOT see any of this information in print anyplace, wonder why?
     
    Last edited: Feb 25, 2010
  4. acaciaavenue

    acaciaavenue Chopsocky Champion

    Thank you for the backstory on the Edelbrocks, it's appreciated. The more I read here, the more it seems like my experience with Q-jets have been bad perhaps because they were never rebuilt correctly, or I just had an old crappy one that needed a proper rebuild.

    I've got an email into John Osborne, who seems pretty highly recommended here on the boards - any other good Q-jet rebuilders out there that can be recommended?
     
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member


    Cliff R.
     
  6. acaciaavenue

    acaciaavenue Chopsocky Champion

    Ok, so Cliff R (from above) - you rebuild Q-jets as well? If so, here is my information and questions:

    I am running a 1968 Buick Riviera, 430, 4bbl. Stock engine, stock intake - but will soon be putting on a Performer intake just to get a little more performance. Stock drivetrain, no air conditioning and stock exhaust. Not sure what other factors you might need, but that's all I can think of at the moment.

    What is the cost and procedure for having my carb rebuilt, along with the expected wait time?

    Thanks!
     
  7. DaWildcat

    DaWildcat Platinum Level Contributor

  8. Cliff R

    Cliff R Well-Known Member

    Thanks, and those things are better discussed via emails or by calling the shop anyhow. We're on the Forums to help folks, but still have to pay the bills!....Cliff
     
  9. acaciaavenue

    acaciaavenue Chopsocky Champion

    Thanks Cliff - just sent you a quote request through your website.
     

Share This Page