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

Does Jet Performance rebuild very good Quadrajet carburetors?

Discussion in 'Street/strip 400/430/455' started by VET, Feb 15, 2025.

  1. Bigpig455

    Bigpig455 Fastest of the slow....

    IMG_2119.jpeg Ken @Everyday Performance ran this Offy 360 Spreadbore on his 73 Century. It’s got two 750 CFM Q-Jets. It never made it to the track but ran like a scalded cat and didn’t tear through gas. After the car was sold I found the set up on Marketplace and grabbed it. I don’t think it’ll fit under a stock 71GS hood but I’ve got a plan…
     
    techg8 likes this.
  2. hugger

    hugger Well-Known Member

    IMG_20250219_204703.jpg
    My plan for my 68c10
     
    techg8 and Bigpig455 like this.
  3. Guy Parquette

    Guy Parquette Platinum Level Contributor

    Don’t know about the Q-Jets but with the Carters mine fit under the the stock GS hood using the triangle Edelbrock air cleaners just fine without any modifications… well if memory serves, may have to grind a little bit off the underside lip of the air cleaners.
     
    Bigpig455 likes this.
  4. m louk

    m louk Well-Known Member

    These photos from GS EXTRA Judd brother's pro stock car 1740088902479_image1.jpeg 20250220_140445.jpg
     
    VET likes this.
  5. CJay

    CJay Supercar owner Staff Member

    That's a pro stock build. How does it work without spacers under the hood of a bone stock engine?
     
  6. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    100 hp with a carb spacer? I'll take two...
     
  7. VET

    VET Navy Vet, Founders Club

    WoW, 100 HP, with just using a 2 inch spacer on an Offy tunnel ram on both carbs. Now that's amazing. Vet
     
  8. CJay

    CJay Supercar owner Staff Member

    Basically, it's 100 horsepower for every 2" spacer. If you raised the carb up 4" that would equate to an extra 200 horsepower
     
  9. TrunkMonkey

    TrunkMonkey Totally bananas

    That would be about 20-25 HP on a stock or Stage 1 build.

    Pros stock is pushing 800-900, and able to a great deal more air/fuel.


    Racin' is like Real Estate. It's all about "Flowcation, Flowcation, Flowcation!"
     
    Tomahawk likes this.
  10. CJay

    CJay Supercar owner Staff Member

    On a stock appearing mild build, those gains can be accomplished in other areas without having to raise up the carb to the point you can't close the hood.
     
    Brett Slater and TrunkMonkey like this.
  11. TrunkMonkey

    TrunkMonkey Totally bananas

    Yep.

    Everything in moderation... :D

    [​IMG]
     
    m louk and Brett Slater like this.
  12. VET

    VET Navy Vet, Founders Club

    This is the reason why I like a cross tunnel ram manifold, you get a longer runner without having to go through your hood, plus I can still add a carb spacer if I want and still close the hood.
     
  13. VET

    VET Navy Vet, Founders Club

    This is what found.
    A typical NHRA Pro Stock car produces around 1,300 to 1,500 horsepower, with engines designed to generate power from a maximum of 500 cubic inches.
     
  14. m louk

    m louk Well-Known Member

    See post #57
     
  15. m louk

    m louk Well-Known Member

    That is adding an additional 2 inch spacer makes for a funky looking tunnel ram. :D
     
  16. 12lives

    12lives Control the controllable, let the rest go

    extra hp at a narrower rpm range
     
    Mark Demko likes this.

Share This Page