INDY TunnelRam

[HardcoreB]

Hello/HNY all, It's been awhile since I've posted so, I will give some updates for reference purposes. I have a 11:1 CR home-built 485CID BBM enigine with INDY SR heads and INDY 2x4 Tunnelram. It makes about 800HP now using old Proform 1.38 downleg bodies over 1.75 baseplates on 100LL avgas. I'm doing a new 540CID engine now with better heads (900-925HP) and considering Q16 AS THINGS EVOLVE DOWN THE ROAD. With that said I feel I should at a minimum use larger airhorns. The plenum on these intakes is SMALL, I've added a spacer but, at 485CID I'm around 70%. I want to stay 4150 based for many reasons. I could buy bodies and swap them out, WHAT DO YOU FEEL IS THE BEST SOLUTION? I'm thinking 1.5x bodies with annular boosters which would be modular enough to transition to Q16 later. I'm free to share any info about the platform if you feel it's relevant.

[HardcoreB]

Motor

[HarrysTaxi2]

I'm currently in the middle of a similar build. 528 w/4.5 bore indy-1's. i have an indy tunnel ram that i'm not sure i'm going to use it. i don't care for the intake runners not having the same entry angles to the ports and as you mentioned, the small plenum. I don't have the option of adding much height. Also, the runners cc the same, but don't have the same angles......and i'm pretty sure there isn't enough meat there to correct that. I'm thinking of looking into a sheetmetal intake.

As for carbs, Braswell spec'd 1.80 throttle bores and 1.58 venturi 4825 2.5 circuit w/downleg boosters. He said they'd flow around 1100 cfm ea. (this was for C12-14)

Don't have any knowledgable suggestions yet, just relaying what i've learned to this point.

[HardcoreB]