BBC Tunnel Ram Recomendations
 

Thinking of going to tunnel rams and I don't have a clue as to what intake seems to be the best bet. Anyone have any dyno experience with them or know of any that will make decent power around 6000?

Re: BBC Tunnel Ram Recomendations
 

contact richie zul or jc perf, there the only people i've seen running tunnel rams.

Re: BBC Tunnel Ram Recomendations
 

Did lot's of testing back in the 80's, so the info is stale, but if I remember right it was the Edelbrock Victor & Dart. On a 540 Cu in 750/850 carbs were way up over Dominators. Wound up using the Victor because I already owned them.

Picked up 20 HP or so by having the manifold ported. I sure you will get some more current opinions.

Re: BBC Tunnel Ram Recomendations
 

I used a Dart on my old 632". Worked great, no hesitation or stumble anywhere. I don't know what combo you are putting it on but the key is to stay small with carburation. Mine made 900HP on pump gas with 2X775 race demons. 2 dominators would probably have made more power on top with lots of drivability problems elsewhere. You can spend 4 X's as much on a custom sheet metal intake, but usually us boaters don't turn 7500+ rpm to really see the difference. :drink: If you have a tunnel ram properly matched for your application you will make more power AND more torque over a single plane. I'd guess its worth from 20-40HP over a single plane becoming more noticable on top.

Re: BBC Tunnel Ram Recomendations
 

Thanks much for the info! I do have a pair of 850's now for each that flow close to 900 each. Thought is to build 588 motors at 9.5 cr and set them up so I can use blowers or tunnel ram. I have 8-v's so the higher cr will help as I do not have inner coolers. Just in case gas gets completely out of control! :(

Re: BBC Tunnel Ram Recomendations
 

CFE is a good place to start. Talk to Scott. Carl's induction systems are some of the best.

Re: BBC Tunnel Ram Recomendations
 

If I'm not mistaken Dart no longer offers the tunnel ram the one from CFE and Profiller are the only ones I use they work well and Marc from BAM is right the small carbs are the way to go marine.

Re: BBC Tunnel Ram Recomendations
 

Actualy CFE is the one who did mine.

Re: BBC Tunnel Ram Recomendations
 

I'm not sure about Dart no longer offeing a TR. I will say that my last Summit racing catelog still had them listed, I did notice the price went up $100.00 sometime in the past yr or so though. I guess its only a phone call to know for sure.