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Thread: Weber tuning

  1. #421
    you can't keep the demanded average speed , not cutting corners … more, many corners have mud&water on it , so driving on the road is just gliding away….. cutting the corner keeps you inside and only sideways once again on the straight road.
    The broken rims were on concrete roads , those have sharp edges , and the mud just near it is already deep, thrown on the road by previous cars….
    Tarmac roads are safer , they do not have those sharp edges ….sure not on old ones , they are round and broken ….

  2. #422
    Senior Member Funding Member t walgamuth's Avatar
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    Sounds like wheels and tires are part of the price to compete.

    Taller sidewall tires would help though. It'll cost a small fortune though to replace wheels, tires, and rotors (and calipers maybe).

    I'd like taller sidewall tires on my car but 16" or larger rims are all that will fit over my brakes.

    I'm not ready to bite that bullet just yet.
    Cobra loving, autocrossing, grandpa Architect

  3. #423
    yes , that will be $$$$ again…. at least 5 ( better 6 ) wheels and tires, rotors,calipers…. Santa Claus ?

    Also important , my 245/40/17 are 63 cm diameter and i must push them in the spare wheel well... so no go for bigger diameter .
    Options are
    225/50/16 with choice in tires , but i'm afraid not enough difference to be safe.... but i could keep the big brakes
    225/55/15 , more safe , but limited choice in tires… must check. Needs other brakes/calipers… oem ? kit ?

  4. #424
    Senior Member Funding Member t walgamuth's Avatar
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    I have the 16" rims on my car. Tire choice is more limited than with the 17" rims. What type of tires you looking at?
    Cobra loving, autocrossing, grandpa Architect

  5. #425
    now i'm running Michelin Pilot Alpine PA4 ( winter tires) , as on the first rally of the year there can still be snow….and so ….i have used them always. Also in mud they perform well , and i'm used to them for going "sideways"….. smooth and predictable traction . I have 2 complete sets on Schnitzer wheels 8 1/2 " and a spare in the car .
    Had a better look today , my first wheel can be repaired , the second is toast ( and the tire) , sure for use in rallys.

    Will have a look at options... our tires must be street legal , so no racing stuff allowed.

  6. #426
    Senior Member Funding Member Ron77's Avatar
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    Barry,

    It is getting really hard to find good tires in the 15" size here. My Coupe has 17" wheels and there is a much better selection of tires for them than the 15" ones.

    Ron
    MY ALBUMS

  7. #427
    GROUCHY FUC***G OLD APE Funding Member Silverback's Avatar
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    Go for the 15 inch tires and wheels. Brakes are for pussies and overrated.

  8. #428
    Senior Member Funding Member t walgamuth's Avatar
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    hah hah!..........
    Cobra loving, autocrossing, grandpa Architect

  9. #429
    Senior Member Funding Member Ron77's Avatar
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    Actually Barry if you are going to continue to run into curbs and such maybe steel wheels with solid rubber areound them.

    Ron
    MY ALBUMS

  10. #430
    i bought 16" wheels ( OZ racing) with Michelin Alpine tires…. so i can keep the big brakes and are ready for the next rally on 16 Februari . See what it gives, at least we have a inch less rim and more tire.
    SAM_2615.jpg

    I'm building a spare engine M30 ( more for the blue coupe , but could be used for both of course ) , and in search for torque ( instead of webers and long tubes) /easy installation and tune ( dual carbs) ,i found a inlet manifold that was ever used on M30's in 5 series and marine engines....to use a single 4 barrel carb ! ( oem was a Solex carb) .
    Now this one can be modified to a Holley or Edelbrock carb….with some welding …. which got my interest....

    What would you guys chose ? i know the Holley from my Corvette and a Edelbrock was on the Pantera….. i liked both but can't compare as it were 2 different cars….


    here are some pics from the net ,somebody doing the mod on such BMW M30 manifold….
    IM.jpgIM1.jpgIM2.jpg

  11. #431
    GROUCHY FUC***G OLD APE Funding Member Silverback's Avatar
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    Personally Norbert I would go with the Holley. To me they are very simple to work on and tune.

    But then I have never had an Edelbrock so I cannot comment on them.

    And a tube header can still provide low end torque. You just need to get the correct tube length for torque.

  12. #432
    Senior Member Funding Member t walgamuth's Avatar
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    I don't recommend the Edelbrock for any sort of racing. it works ok on the road but a long hard corner pushes the gas up agains the side of the bowl and it starves out.
    Cobra loving, autocrossing, grandpa Architect

  13. #433
    does a Holley has a "build in" provision against starvation in corners what a Edelbrock doesn't ?

  14. #434
    Senior Member Funding Member Ron77's Avatar
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    Barry,

    I tried an Edelbrock once and took it off after the first race and have used nothing but holleys since. They work a lot better, are easier to keep tuned, and to me they give more power, especially when racing. And I neverhad any starvation problems with the newer Holleys as they addressed that problem. You might want to install whistles to keep the engine from dying if you have to really slam on the brakes as that causes the fuel to slosh and some goes up through the ventsand out onto the intake.

    Ron
    MY ALBUMS

  15. #435
    must also pay attention at the fact that on my M30 engine the carb would be "across" the car ( see manifold pics , and i would like dual plenum for torque down low) , where on V8 manifolds it is in line with the car . Don't know if that can give problems ? I assume "cornering issues" would be switched with "accel/decel" issues .

  16. #436
    GROUCHY FUC***G OLD APE Funding Member Silverback's Avatar
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    You want center pivot float bowls on the Holley, not the side pivot ones.

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