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  #31 (permalink)  
Old 08-10-2013, 08:38 PM
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useing the WRONG carbs will kill way more power than any power difference of running a Oval port tunnel ram on a Square port BBC head AFR, stock or otherwise.

Carb choice ='s critical factor

Oval port intake manifold on a square port BBC head ='s non critical very minor factor.

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  #32 (permalink)  
Old 08-10-2013, 09:04 PM
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OK but lg1969 covered this same discussion in a former post, and I agree with what he as to say, he actually has a tunnel ram on his ride along with 25 plus years of experience with thim, thanks for the opinion tho!
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Old 08-10-2013, 09:05 PM
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Contact him for some really good info, the guy is really a genious
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  #34 (permalink)  
Old 08-10-2013, 09:24 PM
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His advice on carbs for this is fine for Street cruiser duty. If how you define power is being able to spin street tires.
Small cfm carbs and All vacuum secondary carbs will give up a lot of performance and real Horsepower
compared to the right carbs 750Dp or edelbrock 750 AFB.
i don't need his advice and I have been doing this stuff longer.

There is a difference between "ya runs great" and real horsepower.
The 600cfm VS carbs are great for non serious street duty for Street cruiser/// posers.
But you will get your doors blown off by a similar car with the right carbs on a tunnel ram.

If you want to choke a otherwise fine 496 w AFR heads motor, be my guest.

Last edited by F-BIRD'88; 08-10-2013 at 09:31 PM.
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  #35 (permalink)  
Old 08-10-2013, 09:50 PM
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Quote:
Originally Posted by F-BIRD'88 View Post

The 600cfm VS carbs are great for non serious street duty for Street cruiser/// posers.
Not sure, but I think you just called me a poser.
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  #36 (permalink)  
Old 08-10-2013, 09:54 PM
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when I had my 67 Camaro I tried the dual quad idea for awhile. I use 2x 750 cfm carters on a 350. It did not bog or hesitate in any way.If I had a good 496 (cant believe you are using heads that can produce 850 HP in single carb mode)I would use 2 x 850 cfm carbs for the street.
If your square port 335 cc AFR headed rat makes 600 hp,hang your head,,,lol.
seriously,why not trade for some 265 cc oval port AFRs
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Old 08-11-2013, 12:11 AM
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As you can see in this picture of the under side of the Edelbrock street tunnel ram 2-O
there is lots of meat at the port flange to allow port matching.
Thats why they don't make a square port street tunnel ram version any more.
Just port match it. And don't get all carried away. As a exact match to the huge Square port entrance is not required.

in your specific build and intended purpose the smaller intake runner is a PLUS.
aids torque and throttle response.

As I said Edelbrock and AFR can advise, if it will make you feel better.


Remember you can and will exceed your stated power goal with this intake manifold on a 496 even in bolt on as cast form
with no port matching at all, But not with tiny VS carbs that were never intended for a tunnel ram.

But you will probabily fubar the camshaft choice too. Another critical factor.

Last edited by F-BIRD'88; 08-11-2013 at 12:23 AM.
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Old 08-11-2013, 04:21 AM
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What do u run on your car, motor and carbs, you still haven't answered that, I hope its not a 305 or 350 cause I do beleive you could be suffering from small mouse syndrome. Ill listen to Nolowrider cause he had a set up just like mine, *******s are like opinions everyones got one, some are just bigger than others.
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Old 08-11-2013, 08:39 AM
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vague questions/op

Quote:
Originally Posted by tuff82 View Post
What do u run on your car, motor and carbs, you still haven't answered that, I hope its not a 305 or 350 cause I do beleive you could be suffering from small mouse syndrome. Ill listen to Nolowrider cause he had a set up just like mine, *******s are like opinions everyones got one, some are just bigger than others.
who are you talking to and what are you talking about specifically?
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  #40 (permalink)  
Old 08-11-2013, 10:08 AM
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Quote:
Originally Posted by tuff82 View Post
What do u run on your car, motor and carbs, you still haven't answered that, I hope its not a 305 or 350 cause I do beleive you could be suffering from small mouse syndrome. Ill listen to Nolowrider cause he had a set up just like mine, *******s are like opinions everyones got one, some are just bigger than others.
I'm not saying not to listen to Fbird's advice. He always gives solid answers, and is well respected here. (although I think he called me a poser, lol) I'm just a nobody here. I'm just telling you what worked for me. Did I leave some HP on the table running the 600's? Maybe, not sure. I had fun with the TR and it gave me no issues and always gave me a big smile. But, you have to build your total package, ie. cam, stall, gears, timing, ect. I never ran mine ride at the track or put it on the dyno. My a** in the seat response said fun, and my red light to red light was pretty damn quick.

I was also told that Street Avenger carbs would not work with a blower motor, well you know what? They do, quite well. Would blower carbs give me more HP? Probably, but when I can lay rubber at 45 mph, who cares.

Now, let the bashing begin.
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  #41 (permalink)  
Old 08-11-2013, 02:41 PM
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That's what im saying too man, I have 410s 3500 stall and the cam and heads are all matched together from my engine shop. My dyno guy said he can make them work no prob, just a little more work than a single. Just like my jet boat, everyone said my 870 street avenger would bog, they don't say that now when I take them for a spin, lol. Thanks for the info guys!
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  #42 (permalink)  
Old 08-12-2013, 10:22 PM
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Quote:
Originally Posted by tuff82 View Post
Whats up
Im building a 600 hp 496 ci bbc and debating putting a tunnel ram on it, if anyone has had any experience with these let me know either good or bad, thanks!
Looks like you already had posted a similar question here Dual or Single Carb? Not sure what answer you are looking for, looks like your still uncertain. I would recommend you do your own dyno session to be certain, not cheap but each combo is different and maybe help in your final decision.
In the past the Dart single plane they (Dart) recommended on the smaller CI bbc to use the oval port and port match to the rec port head, you could call edelbrock to see if that is ok or just run it as is...
F-bird'88 has posted several good suggestions.
Myself I prefer double pumper's and run an older Pro Ram oval port on a 427 now with a pair of quick fuel carbs. TR's like a lot of initial advance 20+ some even lock them full. And no two combos are the same and that is where setup and tuning come in.
Here is most current pic.
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