Quote: I had a set of 750 vac. sec. Holleys on my tunnel ram and they ran ok. Nothing to really brag about. I the had a set of 660's worked up and it was night and day. I dropped 1 second.
I'm guessing something was badly wrong with your Holleys or the vac secondaries didn't work good on the tunnel ram. My tunnel ram with 2 750 Quickfuel double pumpers ran 9's at 136 MPH, I highly doubt it would have went quicker with the 660's. But I'm glad you found something that worked better for your combo.
Well, I was kind of thinking I wasn't getting enough fuel with the 750's. But I was a little hesitant to jump to a set of 750 dp's. Thinking I may get too much fuel so I found the 660 to start with. I still have been thinking of going to a set of 750 dp's, but or now the 660's are doing fine.
