| Re: Check out this Turbo 355 LTX |
Subject: Re: Check out this Turbo 355 LTX by Lcvette on 2008/12/3 15:32:51 cuisinartvette, a carb setup is relatively simple. it requires rejetting of the carburetor and works best with a CARB Box, which simply an enclosure around the carb to equalize the pressure differential on the outside of the carb and the inside so that the venturi effect continue to work as intended with an equal pressure differential. obviously in doing this the fuel system will require a pressure regulator with a 1:1 boost pressure to fuel pressure ratio meaning as boost pressure increases, fuel pressure increases to maintain the correct base fuel pressure to the carb bowls and continue operating as intended. fuel system upgrades are of course required because most carb motors do not use high pressure pumps and if boost in the 20psi range is to be seen then the pump would need to be able to comfortably supply the volume requirement and the increased pressure to match boost pressure on the 1:1 ratio. other then that the jetting take s some tweaking to perfect and I would recommend sending the carb to one of the various tuners who have perfected the modifications to the carb to get you close enough that the changes you'll make from that point forward will be no more mysterious then the ones you'd make to a naturally aspirated carbed motor. timing of course would need to be dealt with, but with the various ignition controllers out on the market today even a tunable laptop ignition controller that utilizes a map sensor and can adjust the curve through boost is available. carb's can successfully run with turbochargers but some of the benefits of fuel injection are lost on the fueling side. some benefits to a carb turbo setup is the fuel coming out of the carb will have more impact on cooling the air charge because it has a longer path to travel before reaching the back of the intake valve for each port so the latent heat of vaporization has a longer time to work and more heat can be pulled from the compresed inlet charge! Hope this answers your question, feel free to hit me up if you'd like any further information! Chris |
