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75duce

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Everything posted by 75duce

  1. 75duce
    Jim at masa performance in Costa Mesa Ca is the guru on the e3 and e12. He has lost of old parts for them too . Jesus at coupe king in Wilmington ca . has a really nice 1975 e12 . He won best of show at woodly sol ca vintage one year with it . He knows the e12 well.
  2. 75duce
    I have a 242 cr dog leg in my 2002 , m20 sport engine . 205-60-13 tires. I have many different rear gears . A 3.64 is what I run most of the time . Street / track day car.
  3. 75duce
    I would not do it . I don’t like the dgv carbs. Save your cash for some side draft 40s. the down draft carbs take longer to jet . They seem cheesy cheep to me . I ran a 38/38 on my race car for years. Dual side drafts is better. The only reason racers run the single is for the class rules .
  4. 75duce
    Thanks got it fixed
  5. 75duce
    Name: BMW 2002 M20 Road weapon Category: BMW '02s Date Added: 2020-10-10 Submitter: 75duce BMW 2002 M20 Road weapon
  6. 75duce
    A interesting way to tune the low speed fuel metering. Remove the entire main jet stack. And go for a drive . Just be cautious you won’t have much power . Don’t try in the hills . You will be able to see where the low speed cruise mixture ends and the main needs to tip in . It Is surprising how much driving you can do on just the idle jet.
  7. 75duce
    I like to go with minimal drop. Just enough to fuel the engine in top gear maximum rpm for an extended period. To much drop can cause the floats to jam in high g corners. sloshing in the bowl ,and fuel gushing in erratic metering. I run 3 mm drop on mine for example.
  8. 75duce
    Float level is a tuning tool . Both float height and drop. higher will give you a richer overall mixture , lower will give you a leaner overall mixture. I like to start at 25mm , but I may end up at 27 or 29 . All depends on the setup . And testing. tuning the float level takes extra time but is worth it.
  9. 75duce
    Yes aligned so as soon as you open the butterfly the first progression hole is being exposed.
  10. 75duce
    https://www.webstore.com/item/Weber-DCOE-Progressive-Hole-Drill-Fixture/96438149
  11. 75duce
    Sounds like your float level may be a little low . 25mm below the the top for the main jet tower is a good place to start. you want the fuel to be just a few mm below the spillway so the e tubes don’t have to suck the fuel up so much . the air corrector jet is the bleed for the main jet and will control the main jet tip in . Top end high rpm is comtroled by the main jet. one thing to keep in mind is the carbs are designed for performance and not economy , don’t get to hung up on afr readings and give it what it wants . 4 times the Venturi size will give you your main jet size to start with and most of the time it is perfect 12.5 afr . i like to set my cars up with a slightly rich idle not best lean idle . This will make the transition in the progression smoother. One thing to also look at is if the throttle butterfly is centered over the first progression hole . If not the engine is going to go lean as soon as you move the throttle. Requiring a large idle jet and lots of turns out on the idle mixture screw to overcome the flat spot . A tool was designed to fix this problem by drilling a new progression hole closer to the butterfly. I have use this tool on many cars with good results.
  12. 75duce
    750.00 bolt on .
  13. 75duce
    I still have the molds and I am still producing parts.
  14. 75duce
    Lower the car onto the whole assembly.
  15. 75duce
    I made some new molds for the rear just a little wider than the old kit.
  16. 75duce
    I would just put a few layers of good masking tape on the out side of the fender and grow the back edge with woven glass , chop strand mat and resin. just make sure to grind it on the in side we’re you are going to lay it up . l like as much glass as possible. The 2002 front fenders are heavy. i like to fit the rears with celco clamps then just rivet them on . Then I can easily remove them if I get hit or tag a tire wall I can change it out in minutes. I did one cars rears were I put nutserts in the steel quarter panel and used nice screws to hold the glass fender on. On my kit you just screw the blinker in solid fiber glass . The blinker fits in the molded cavity . You just need to run a ground wire to the body.
  17. 75duce
    You want a rich idle with sidedrafts . A larger idle jet will also help with the falling flat on hard acceleration from a stop . A slightly higher fuel fuel level helps the mains come in with less velocity through the chokes.
  18. 75duce
    48 dco webers . Cheater motor.
  19. 75duce
    Sorry if i came off as hateful the opposite is true . Ace you are doing great work. I want to buy some manifolds off you . i just dont want to have to fix it first. If you are making a new design from scratch why compromise. They will run at 10. i ran them that way for years. do they run better at 0 yes .
  20. 75duce
  21. 75duce
    To bad you and your hot shot consultants got it wrong . just another poorly designed intake manifold for the m20 . When tuning sidedraft webers the basics need to be right first or you will never get to sidedraft nervana. Sorry I am not trying to be a prick but there is all ready four different manifolds being manufactured all with too much angle that don't clear the booster . We don't need another. It would be nice to be able to run a air box or King Kong air filters over the stacks . Google korman m20 sidedraft Weber manifold and you will see what they did in the 80s . A slightly improved version of that design would be perfect.
  22. 75duce
    They run poorly at 10 deg. 5 degrees maximum up. Trust me I have tested it . You want them flat 0 deg for best performance . Fuel level in the bowl is very important for proper performance with that much angle you won't be able to ge the fuel level high enough with a plastic float carb. To much angle will cause leaking out of the cold start circuit. The manifold needs to be shaped like a swans neck to clear the booster and the distributor.
  23. 75duce
    4x the choke size for the main jet is a good starting point 140 main jet Idle jet I am going to say 55 or 60 f8 . The dcoe 9 has a unique backward chamfered butterfly it will make the progression lean . It will require a larger idle jet and a richer idle mixture. Like a low 11 afr. At idle. The dcoe 45 9 is designed for a big engine 3.8 jaguar. It can work but not the best there are things you can do to make it better . The best dcoe 45 for a m10 is the number 15 and 16 .
  24. 75duce
    No the gas we get is not better. Gas with alcohol needs a richer mixture . No I did not need to drill new progression holes. Shine a light down the carb and look at the holes from above also take a close up pic and post it up . If the plate is not centered over the first hole you need to drill a new one there . You may also not have your idle mixture screws turned out enough. set it real rich just for a test and see what happens at 2- 3000rpm while driving . My car with a sport engine needs a 60 f8 idle jet and a rich idle mixture to get good clean performance in the 2-3000 rpm range . Idle jets should really be called pilot jets because you are on them at 2-3000 rpm cruising along just off idle. a interesting test is to remove the main jet stacks completely and drive the car carefully and slowly you will be able to see just what the idle jets are doing and were the main jet starts tipping in because the engine will die. My car runs weber 3x dcoe 45 #9 and has non removable progression hole covers so i cant show the holes but there are three and they are located just how they need to be with the throttle plate centered over the first hole at idle.
  25. 75duce
    It is the same way with my car . weber sidedraft carbs need a rich idle mixture not best lean . The rich idle jet is also needed because of the 292 cam . Sport cams don't scavenge the chambers as well at idle and just off idle. with the reversion and exhaust diluted mixture a richer idle jet and idle mixture is needed for good progression . It is best to get off of the idle and progression circuit as soon as possible and get the main jets supplying the fuel . New research has shown by running a very small air correction jet a higher fuel level and a emulsion tube with all submerged holes you can get the main jets to tip in very early . Set the throttle plates so they are centered over the first holes and the slightest touch of accelerator exposes the holes to engine vacuum . This is your best idle setting tune the engine idle around this setting and try not to change it . Try to get the best idle speed with the mixture and timing . My car needs a 60 f8 idle jet too for good clean off idle performance with a sport cam and 34 choke .
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