Power Level with Walboro 307

[redwolf]

I was just wondering what kind of power level and what size injectors a Walboro 307 could support. Thanks for your responses.

[HairDrier]

I would trust it into the 11's. It has the same internals as a 340 but a different valve in it which wont allow it to run as high of fuel pressure as a 340. I forget where it cuts off at, but it should be good to 25psi. It should have no problems supporting 009's, and could probably handle 50's below 25psi.

[Slow91z]

the difference between the 307 and the 340 is the pressure spring and the motor...if you shim the spring it will pump just as much as a 340, but at a higher amperage because the motor is less efficient.

[JayC]

One of my guys here local went 10.70 @ 127 with a single 307. Granted, not the smartest move in the world but it was all we had to work with at the time.

[redwolf]

Thanks for the reply's guys. So I guess with a TA-49, alky, and 009's, I could get low 12's on a 307 and be perfectly safe? With a good tune of course. Thanks for your insight.

[HairDrier]

Once you max out those 009's and get new injectors, I would sprring for the pump then. You should be fine for now

[Tom87GN]

if you shim the spring it will pump just as much as a 340, but at a higher amperage because the motor is less efficient.

How exactly do you shim the spring in the pump? I know what shim means I guess, but is there a different spring that can be put in the pump?