I meant to type: You would gain HP by the increased intake flow of the pods, but not over 40%.
On Sat, Aug 14, 2010 at 10:56 AM, Allen Thomas <[email protected]>wrote: > Aldo, I'm a bit skeptical on the 100HP claim. Please educate me. I can't > see how changing carburation could net +40% increase. Here is why: both > carburator sets are the same diameter so they will flow the same CFM. Even > if the slide carbs flowed more CFM, flowing higher CFM only benefits at WOT, > so unless the lower CFM carb were seriously undersized would you get any > benefit. In fact if the carburator flows a higher CFM than the engine can > draw, then you will actually make less power! So taking flow off the table > the only benefits of slide carbs over CV are that you can open the venturi > faster as it is not depending on vacume to move the slide. This has > importance to drag racing; first it allows you do run pods with no ill > effect, it also allows you to drop the weight of the airbox, and lastly you > can feel if you are opening them at the proper rate (like I said if you're > carb flow is higher than engine draw you loose power). You would gain HP by > the reduced intake flow of the pods but not over 40%. To get those kind of > numbers you would need to cam, change valve springs, and most likely port > the head, which would maximize the power output at a higher RPM. Also an > ignition advance would be needed which requires a part I have not been able > to find. This of course would take away from the drivability of the engine. > I can't tell you how many hot rods I have spanked over the years that had a > tunnel ram intake with a 750CFM or larger carb on a basically stock small > block. Had they known that a dual plane intake with a 600CFM would make them > faster they might have had a chance. In car terms what you are doing with > slide carbs vs. CV is going from a vacuum secondary to a double pumper. It > isn't necessarily an upgrade, it all depends on the setup. > > > On Fri, Aug 13, 2010 at 1:10 AM, Aldo <[email protected]> wrote: > >> I don't know if any of you are interested but I have some racing carbs >> that will fit a 1991-2003 NH750 I don't know if the other Nighthawks >> have 34mm carbs but maybe they'll fit them too. These are the key to >> unlocking some major power in the CB750 motor. It is not for >> everyone... 100HP is a big difference from 67.7HP >> >> They are 34mm Mikuni Flatslide racing carbs just like below: >> >> >> http://www.orientexpress.com/Universal+Parts+%252526+Accessories/Intake/Mikuni+-+RS+Flatslide+Carburetors+34mm+-+Fits+Kawasaki+KZ+Models%25252FSuzuki+GS+%252526+Early+GSXR+Models%25252FSet+Of+4%25252FClick+For+Applications.html?osCsid=da7bbeaca788817049b0f4c80f2dfccf >> >> If you are interested maybe we can strike a deal... I don't want to >> lose too much cash on this but I am not using them so I better sell >> 'em. >> >> >> >> I also have: >> >> Stock NH750 seat in nice shape. $90 Shipped >> >> Stock 4 into 2 pipes in nice shape. $100 + shipping >> >> Stock chain guard in nice shape. $25 Shipped >> >> Stock mirrors also in nice shape. $25 Shipped >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Nighthawk Motorcycle Lovers!" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<nighthawk_lovers%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lovers?hl=en. >> >> > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
