holley 4150 vs. 4150HP

dgc333 said
You will very likely not get any more power with the built 750 than you would with a stock 650 on a mild 340. The engine certainly won't be able to use all the capacity of a built 750 but on the plus side it should work well and not have the low rpm driveability loss a stock 750 would have compared to a 650.

hey dave,
i thought the same thing before about sticking with 650's but here is my reasoning...Both the guy im getting it done by and prosystems recommened carbs flowing at the very least 750 cfm (in fact patrick at prosystems said atleast 780cfm, and he knows his ****)...When they designed my programs i told both of them the whole setup (very mild) and that the car is 95% street so i want the throttle response there and they both said that it will be there...im no carb expert, but if they are both telling me they can build me and tune them to work well for me in these sizes, then i kinda have to agree...i know some run 750's back to back with 650's on 340's and there is no difference in e/t, so it really shouldn't hurt me...if anything it will be a foundation for when i build more power (told them both of my plans to run nitrous in the very short future and up the cam/heads as well, and they told me these are good foundations)

forgot to mention also that the DRC&I carb builder told me that if i go up to the HP main body it saves him less work since he doesnt have to bowl blend (it already flows 839cfm at 28 inches of water) and that it has slightly stronger signal strength which will give crisper throttle response and 3-5 more hp up to 4000rpm over the regular 4150