Originally Posted by mopar dave
working on another induction option. 511 with 12.5:1 compression a 270@50 SFT and an Indy 400-I4-15 t ram. Street/strip deal, which carbs would give best all around performance, 650,660 or 750? I see most like the 750's and there are some that like the 660's. My thinking is to err on the small side with the 650's. It seems the Indy tunnel ram has a very large plenum and I thought maybe the smaller carbs would help crutch this on this combo. 5100 stall and car weights 3380#. Appreciate your opinion on this. Thanks



Dave,

Still looking for more out of that combo I see......Is this for the motor in the vid in you're signature? What are you shifting at currently?

Me, I like the 750 or 650's.....What ever Thumper would recommend. I also like the Indy TR over the others for the larger plenum. My little 400 likes anything that gives it more plenum over what it has. The more I take out of the intake, the better it gets. The more spacers, the better it gets. Good heads need to breath....My 2cents...


'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk