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

Rod ratio???

Discussion in 'Race 400/430/455' started by Woodie, Feb 20, 2005.

  1. Woodie

    Woodie Well-Known Member

    I did a search and didn't find any discussion on this topic, soo here it goes.

    Im very rusty on my rod ratio theory so forgive me if Im off. For discussion purposes .030 overbore and stock stroke.

    Most factory rod ratios are very kind to the pistons/cyl walls.

    So by adding a chevy 6.635 or 6.800 length rod the ratio is going to change. Now because of the longer rod, and I would think it would raise the ratio and cause excess bore and piston wear. But what is accectable/unaccectable on a street/strip car???

    Michael :Brow:
     
  2. bob k. mando

    bob k. mando Guest

  3. alan

    alan High-tech Dinosaur

    Here's a chart I did in Excel. The numbers on the left side of the chart are the rod lengths, the numbers at the bottom are the stroke. The left most number in each cell is the rod angle in degrees, and the right most number is the rod/stroke ratio. The "pink" cell is the stock buick 455 numbers.

    I know someone who runs a BBC top sportsman car with a rod/stroke ratio of 1.50 and a rod angle of 19.44. That should be terrible (and may be!) but he keeps it under 8000 rpm, has little wear on the parts, and goes rounds.
     

    Attached Files:

Share This Page