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  1. Brandnew

    General Pulley - Mech Advantage Ques

    Thanks, that makes sense.
  2. Brandnew

    General Pulley - Mech Advantage Ques

    I'm looking for some general information on pullies and advantage. It's been a LONG time since I've had to deal directly with pulleys....be gentle. I understand that the mechanical advantage, in general, of a pulley system is the # of supporting cables. For example, the system shown in the...
  3. Brandnew

    Boost question

    Thank you for your thoughts. Glad to see I was thinking along the correct lines.
  4. Brandnew

    Boost question

    That's what I was thinking too. I can understand holding the heat in the exhaust manifold but in the downpipe it seems counterproductive. I bring it up because I recently saw a car with the "downpipe thermally wrapped". Curious what the exprets thought on this.
  5. Brandnew

    Boost question

    Very interesting SBBlue! Is the power the turbine can produce effected if the temperautre is "restricted" from dropping after the turbo?? Specifically, I'm wondering about those that thermally wrap the downpipes AFTER the turbo. In theory, does this hinder the power the turbo can produce...
  6. Brandnew

    Road Safety, car design vs driver skill vs legislation vs cost benifit

    Very interesting discussion! The item that really seems to hit home for me is driver ATTITUDE. The "this is my lane" mentality seems to be frightenly too familar to me. No amount of gadgets or training will fight off someone trying to prove a point for the "principal of it". For whatever...
  7. Brandnew

    "Proper" intake air temp (IAT) sensor location....

    That's the strange thing. The problem only occurs during idle/cruising, when the car is running off boost. Once you get on boost the car runs great. The problem is that the LTFT values modify the open loop operation so it may only be a matter of time until it leans out a WOT run. It does...
  8. Brandnew

    Calculating lateral earth pressure

    Maybe this will help...... http://www.eng-tips.com/viewthread.cfm?SQID=16393&SPID=256&newpid=256&page=1
  9. Brandnew

    Turbo V Engine - Exhaust Manifold Design

    Thanks for the replies. Looks like I don't have to worry about the collectors too much. I know Grand Nationals have this set-up but I don't know of anyone locally with one. A search of the internet prior didn't turn up any good EM pictures.
  10. Brandnew

    Turbo V Engine - Exhaust Manifold Design

    Thanks for the reply. Planning to run the car in two settings: street and track. Street will run about 5psi; track will run around 12psi. At the highest boost it should be around 2.0-2.1 hp/cu in. Can you expound the on the balance tube (cross-pipe)?? I've seen them referred to (and even...
  11. Brandnew

    Turbo V Engine - Exhaust Manifold Design

    Looking for insight on designing/routing exhaust manifolds for a single turbo on a V6/V8 engine. Lately the trend has been to go with parallel twin turbo but I'm looking to go to a single turbo in this application. Unfortunately, due to the twin turbo trend I'm having trouble finding...
  12. Brandnew

    "Proper" intake air temp (IAT) sensor location....

    Schmidt, Just to answer your question the fuel trim is off by 15-20%. It's actually running rich (i.e. -16%). Not everyone has the problem but those that have it can't seem to get it to go away.
  13. Brandnew

    "Proper" intake air temp (IAT) sensor location....

    Just as an update. I did a little more research and the IAT's in this instance are used for timing control and knock regulation.
  14. Brandnew

    "Proper" intake air temp (IAT) sensor location....

    Thanks!!! That's answers it. I was thinking along the lines of density not mass. DOH! If you think in terms of mass it has to stay the same. Thanks again!
  15. Brandnew

    "Proper" intake air temp (IAT) sensor location....

    Thanks for the reply. A MAF will measure the correct mass flow...near the air box. But when you take the air right before the intake and run it through a supercharger you change the mass. I'm just wondering if (and to what extent) they use the IAT sensor to do some last minute adjustments...
  16. Brandnew

    "Proper" intake air temp (IAT) sensor location....

    Thanks for the reply. Well that makes me feel better knowing that they can at least do something with IAT input. Now, if they did?? :-) I should have stated I'm running a mass air system, with MAF et al.
  17. Brandnew

    Piston acceleration---again!

    Just look at one piston, the first piston. At TDC the first piston is at the top of it's travel (crank 0 deg). At BDC the piston is at the bottom of it travel (crank 180 deg). At TDC and BDC the piston is not moving, however brief that may be. In between these two points the piston moves...
  18. Brandnew

    Roots SC Intercoolers

    I get it, nice!! You put it 45* front to back. Then take it out on the "down" side and put it back in on the "up" side. Nice idea!!
  19. Brandnew

    Roots SC Intercoolers

    Good article, thanks! Do you have a picture of what you did?? I'm having trouble envisioning it?
  20. Brandnew

    "Proper" intake air temp (IAT) sensor location....

    I'm having an argument about the proper location of the intake air temp (IAT) sensor with a fellow car fan. I'm sure I'm right but I want to check with you guys to make me feel better (or worse?). Okay, the car in question has an IAT sensor right at the throttle body. The throttle body on...

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