Re: old school tunnel ram and carbs question
 

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Here is a pic of a metering block. I tried to show the liquid line restricted. You can see a non restricted line on the other side of the block. The pencil is pointing to the restricted line. I used a an 0.018" steel wire and bend it in a "U" shape so that it fits in both ports. It is retained by the metering block flat gasket.

I get the wire from just about any parts tag, they all seem to use this wire and are readily available in most shops. If you can change a powervalve, you can do this mod.

https://www.yenko.net/attachments/130911-600m2.jpg

This shows the wire installed in the two holes the pencil is pointing to as well as another similar wire not installed.

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Hey thnx..great idea I like it!! easy to change sizes to..we have some stainless I am going to measure it.

Re: old school tunnel ram and carbs question
 

the best carbs are 660 center squirters all others feed most of the accelerator shot down 2 cylinders and starve the other 2 hence the bogging problems inherent with these setups the 660s sqirt a 4way shot down the center of the carb and tend to charge the cylinders evenly. They cost a mint now ebat runs 500-600 apair used i dont think holley makes them anymore. They were designed for dual 4 applications. usually only double pumpers are mounted sideways since they dont fit ny other way vac sec carbs are usually mounted inline.

Re: old school tunnel ram and carbs question
 

okay finally i'm going to put the tunnel ram on this weekend !!.one question though ?? is what is a good baseline carb set-up [i.e] jets,power valves and pump cams for these 600 vac secondary carbs.right now on my motor i'm running a very nicely tuned holley 750 DP,it has these parts in it https://www.yenko.net/ubbthreads/imag...ins/tongue.gifrimary - #76 jets, #8.5 power valve, #31 squirter and orange pump camsecondary - #80 jets ,#35 squirter and red pump camso what size jets will work i know the power valve will stay at 8.5 and the pump cams orange "maybe" https://www.yenko.net/ubbthreads/imag...ns/worship.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

Re: old school tunnel ram and carbs question
 

How did you make out this weekend working on the tunnel ram? Jets stay the same size. Remove choke and choke plates on each carburetor (if it backfires they will flip 180 degrees).

Re: old school tunnel ram and carbs question
 

well i went to a #64 jet,#31 squirters,white pump cams,a #9 secondary plate and it seems to work good.there is no choke plate in either carb since i live in sunny so. california.i might try a 50cc reo pump though and see what it'll do because of the large plenum and long runners to the intake valves.also my dual carb linkage is set up right now for both to open at the same time instead of progressive.again this combo seems to be working quite well and feels really responsive when i hit the loud pedal.my friend did a really nice job in restoring the intake and zinc chromating the carbs https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

Re: old school tunnel ram and carbs question
 

hey guys,I have custom set of center squiters that are too big for my motor.They have dominator bowls and F&R metering blocks if anyone can use them.ONLY a couple pulls on the dyno.Email if interested before I put them on ebay.Tom

Re: old school tunnel ram and carbs question
 

here is a pic of the engine with the edelbrock TR1-X tunnel ram and holley 600 vac secondary carbs http://upload.79camaro.com/cpg/displ...amp;fullsize=1

Re: old school tunnel ram and carbs question
 

Hey everyone, wanted to start with saying this has been a really helpful string. Im a younger guy, bought a chevelle when i was 17 and now just deciding its time to dump some cash into it. Kicking around my friends garage is a rectangle port tunnel ram, i like the look of tunnel rams, but i have oval port heads. i read somewhere recently that you can use the rectangle port intake with matching gaskets on oval port heads.. any ideas or comments here guys?

Re: old school tunnel ram and carbs question
 

You can run square port intakes on oval port heads, I've seen it done with success, but it is certainly not the "optimal" situation. Square port intakes are designed for square port heads, and are typically higher rise and often times of open plenum (single plane) design. These high rise and/or single plane intakes are a poor match not only in port type but overall design for the smaller, less flowing oval port heads. I'd say you can get away with it if it's a dual plane fairly low-rise square port intake going on oval port heads, but if it's a high rise single plane or something really high rise like a tunnel ram I'd say forget it. It'll give you more headaches and rob you of more power than the "cool looks" will ever reward you with. Just my opinion, I'm sure others will chime in.

Re: old school tunnel ram and carbs question
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DirtyS</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Here's a photo of an edelbrock tr/(2) 600cfm carbs-str. linkage----From that Motion car---maybe this will help--Just some info &lt;img src=&quot;https://www.yenko.net/ubbthreads/imag...eers.gif&quot; alt=&quot;&quot; /&gt; https://www.yenko.net/attachments/128...oooooooooo.jpg </div></div>

If that is a Motion car it really makes me question some of the mystique and values floated around for them.

Looks like something the typical backyard guy would do with some rubber fuel line.

Not impressed. </div></div>

Those look like the 750 mechanical secondary tunnel ram carbs that they don't make anymore, see the fuel line leading up to the passenger side.