BBC Tunnel Ram Recomendations
#1
Charter Member #40
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Thread Starter
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?
#3
Offshoreonly Advertiser
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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.
Picked up 20 HP or so by having the manifold ported. I sure you will get some more current opinions.
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#4
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. 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.
Last edited by jdnca1; 08-12-2005 at 07:47 AM.
#5
Charter Member #40
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Thread Starter
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!
#7
Registered
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.
#8
Offshoreonly Advertiser
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Re: BBC Tunnel Ram Recomendations
Actualy CFE is the one who did mine.
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Marc
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It's not alive -www.BoatStuffExpress.com - temporarily retired
Marc
www.mercruiserparts.com
www.go-fast.com
www.bammarine.com
www.cyborgtransmissions.com
It's not alive -www.BoatStuffExpress.com - temporarily retired
#9
Re: BBC Tunnel Ram Recomendations
Originally Posted by MESABALANCING
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.