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  1. rich weyand

    355 tuning questions

    The best setup for an Edelbrock is an air-gap manifold with the original thermac air cleaner setup. Then you can keep the Edelbrock right in the temperature window.
  2. rich weyand

    355 tuning questions

    If you are getting a Qjet built for your setup, get it from Sean Murphy at SMI. He'll know exactly how to set it up.
  3. rich weyand

    355 tuning questions

    I set up my 1406 three-four years back and haven't touched it since. Once a year I clean off the step-up pistons -- when I don't forget. So I haven't seen consistency problems.
  4. rich weyand

    355 tuning questions

    Any carb you just buy and slap on will run like shit unless you get real lucky. Carbs need to be tuned. Not tuning the carb you have will not be fixed by buying a new carb and not tuning it either. You're just pissing money down a hole, and you will still have an untuned poorly performing...
  5. rich weyand

    355 tuning questions

    If he's revving above 6500, the 1406 will run out of breath. Short of that, no.
  6. rich weyand

    355 tuning questions

    A 355 at 5000 rpm with an unattainable 1.0 volumetric efficiency will pump 500 cfm. He's not using all the carb that's on there unless he's revving higher than that.
  7. rich weyand

    355 tuning questions

    Edelbrocks are set up from the factory for low-vacuum engines, and they are also set up rich because most people don't tune them and rich is less bad than lean. Use the 8" step-up springs from the spring kit...
  8. rich weyand

    My first square body

    Don't forget, it's a simulator. It's best for comparing one Comp Cam product to another, but the absolute numbers bear a marginal relationship to a real-life build. It also assumes a very good state of tune of ignition system and carb. Given that, though, that cam would be a good choice...
  9. rich weyand

    My first square body

    Camquest simulator likes the 12-230-2 (XE250H) cam in there. Don't forget to change lifters and springs at the same time. Dual-plane manifold like Edelbrock 2101. Keep the Qjet, but rebuild it. Seal the well plugs. Make sure the throttle plate pivots are tight or install bushings. Looking...
  10. rich weyand

    Intake and carb questions?

    That's what I figured. High-temp epoxy can be used to repair it until you can get new headers, and at least fix that issue for the time being. One issue is to keep the epoxy from just dripping down into the hole and not patching it. The fix is to soak a small wad of steel wool in the...
  11. rich weyand

    Intake and carb questions?

    Is the exhaust leak a rust-through somewhere? Or is it a bad clamp/gasket?
  12. rich weyand

    Intake and carb questions?

    You should fix the problems you know about before you go off fixing problems that may or may not exist. Get the exhaust leak fixed. Change the vac advance can. Change the pop-up springs.
  13. rich weyand

    Quadrajet for Holley swap

    The maximum cfm a 383 can pump at 5000 rpm is about 550 cfm, so you're fine. The Qjet properly set up will be better than the Holley unless you are in a racing application. The Qjet may be off a 350 truck, in which case it is setup internally correctly. It may be leaking fuel at the well...
  14. rich weyand

    Intake and carb questions?

    Make sure you check the base timing with the vacuum advance disconnected. People will tell you that you should block the port, but you don't have to just to set the base timing. But you do have to disconnect the vacuum advance!
  15. rich weyand

    Intake and carb questions?

    Here's the vacuum can: http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Vacuum-Advance-Control/_/R-ECHVC1853_0168354142 Here's the springs kit: http://www.summitracing.com/parts/edl-1464?seid=srese1&gclid=CKim1s38rsoCFZGMaQod_YsEMw
  16. rich weyand

    Intake and carb questions?

    OK, so the problem is that you have a mix of stuff on the engine that is pre-emissions and emissions-era. The vacuum canister is a '691 20 (you didn't give me the second number, but that is what should be on a '691), which is an emissions-era can that will give you too much vacuum advance...
  17. rich weyand

    Intake and carb questions?

    What is your base timing set at? What vacuum advance can is on it? (You should be able to see the stamping numbers on the arm of the vacuum advance unit if you look straight down between the vac advance can and the distributor cap.) Where is your vacuum advance connected, to the passenger...
  18. rich weyand

    400 sbc build

    For the OP: To summarize the discussion, such as it was, with 85C10owner. The 12-212-2 is a performance cam that has nice performance characteristics. I never disagreed. If you want a "torque monster", the 12-235-2 cam has more torque than the 12-212-2, according to the manufacturer. If you...
  19. rich weyand

    400 sbc build

    I still don't see how you compare two cams by riding behind only one of them, even if you have been building engines since you were 10 years old.
  20. rich weyand

    400 sbc build

    The torquiest engine GM ever put a TH350 on was 410 lbft. So you need to seriously build that trans or go to a TH400 to keep from littering the pavement with lots of little parts.
  21. rich weyand

    400 sbc build

    OK, so all I said was that, according to Comp Cams own information on their products, he was leaving a lot of torque on the table with the 12-212-2 grind, compared to, say, the 12-235-2 grind. And this was wrong how? You've argued that the 12-212-2 would generate plenty of torque. You've...
  22. rich weyand

    400 sbc build

    You've got actual builder's dyno sheets on both the 12-212-2 and 12-235-2 cams? Wow.
  23. rich weyand

    400 sbc build

    I ran the simulations on a 400....
  24. rich weyand

    400 sbc build

    Of course. But he said he wanted a "torque monster", and with that cam he's 50, 60 ftlbs below where he could be. That's all I said. As far as hooking up a lot of torque, the 1970 Buick GSX Stage 1 455 had 510 ftlbs of torque, and was a lot lighter than our trucks. It only had 370 hp, but...
  25. rich weyand

    400 sbc build

    I use the Comp Cams Camquest software to compare the Comp Cams products. I don't usually offer much of an opinion of other company's cams. I figure the Comp software ought to do pretty well for their products, at least in comparing one cam to another. The software requires the entry of LOTS...

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