Re: period correct tunnel rams carbs
 

Way do you ask,do you think Tunnel Ram's carbs{with that big Tunnel Ram} won't back fire. Yes you can do it but there are other things to do at the same time to help it to work "On The Street". That Edelbrock TR2 with the 1" center section is good because it helps out for "The Street" user.

Re: period correct tunnel rams
 

The reason I ask is this:

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Da Grump (in The Chevrolet Racing Engine)</div><div class="ubbcode-body">The 4224 idle circuit requires some &quot;fixing&quot; in order to achieve a clean idle with a radical engine. The idle circuit in the number 5913 primary metering block supplied with the 4224 was originally designed for a carb with a power-valve system. The 4224 doesn't have a power-valve circuit and the idle circuit may be very rich with the normal race engine idle settings.</div></div>
And then he goes on to the bit about the 0.017&quot; diameter wire in the idle feed restriction. I was reading that the other night, and I thought &quot;why not just put a power valve in it then? I drive on the street, and it might cut down on some unnecessary fuel consumption while cleaning up the idle and off-idle mixtures at the same time!&quot;

I don't experience backfires very much, but I figure I'd probably install power valve protector check valves while modifying the carbs for power valves.

Re: period correct tunnel rams
 

Sounds cool! So what is your setup? 396 with 660's on what intake? I love real life tuning discussions over speculated theory. Have you posted pics before?

Re: period correct tunnel rams
 

Power valve circuit should help you.
When we ran the 540 on the dyno, the A.F. ratio was down in the 11.0 range. Way to fat for a street car. Bobby Myers added a power valve to the Dominator by removing the block off and drilling two holes into the metering plate to feed fuel to the power valve. After moving down 4 jet sizes, the average A.F. ratio was in the 14.5 range at idle and through the pull.

Re: period correct tunnel rams
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TheNovaMan</div><div class="ubbcode-body">The reason I ask is this:

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Da Grump (in The Chevrolet Racing Engine)</div><div class="ubbcode-body">The 4224 idle circuit requires some &quot;fixing&quot; in order to achieve a clean idle with a radical engine. The idle circuit in the number 5913 primary metering block supplied with the 4224 was originally designed for a carb with a power-valve system. The 4224 doesn't have a power-valve circuit and the idle circuit may be very rich with the normal race engine idle settings.</div></div>
And then he goes on to the bit about the 0.017&quot; diameter wire in the idle feed restriction. I was reading that the other night, and I thought &quot;why not just put a power valve in it then? I drive on the street, and it might cut down on some unnecessary fuel consumption while cleaning up the idle and off-idle mixtures at the same time!&quot;

I don't experience backfires very much, but I figure I'd probably install power valve protector check valves while modifying the carbs for power valves. </div></div>* Also a vacuum advance helps clean up the idle with Tunnel Ram too.

Re: period correct tunnel rams
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pxtx</div><div class="ubbcode-body">Sounds cool! So what is your setup? 396 with 660's on what intake? I love real life tuning discussions over speculated theory. Have you posted pics before? </div></div> If this question was directed at me, I've got a 454 with untouched 990 heads, an Edelbrock TR2X, and a Crane p/n 134691 solid flat tappet cam (256/[email protected], 580/600, 110LSA). It runs pretty well, but I can make it better. The best pass of the three I've made so far was [email protected]. A/F ratio was pretty darn close to what it should be, but it leaned out for a moment after each shift (TH350) and went way rich when I let off at the end.

Maybe I'll try the vacuum advance this weekend and see how it likes it.

Re: period correct tunnel rams
 

<span style="color: #3333FF">Wow..this was a first.
What's the time period on this one ? </span>


http://i745.photobucket.com/albums/x...2-09-16001.jpg
http://i745.photobucket.com/albums/x...2-09-16002.jpg

Re: period correct tunnel rams
 

Looks like Joe Sherman used that manifold back in the mid 70's to run well into the 9 second range with his 70 chevelle. Was made for dominators looks like adapter plates on the one shown.

http://i1219.photobucket.com/albums/...meangreen4.jpg

Re: period correct tunnel rams
 

Re: period correct tunnel rams
 

47 degrees total at 3000rpm!!!