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!!!

Re: period correct tunnel rams
 

47 degrees total at 3000 rpm,possibility distributor retard switch because of 41 degrees at 8000 rpm.

Re: period correct tunnel rams
 

I talked to Joe over on speedtalk and at the time he raced the chevelle it had an unreal for the day 800&quot; lift camshaft so maybe the added timing at lower engine speeds helped it idle better? All I know is 9:50 ets in 1975 was pretty serious! He musta known sumpthin?

Re: period correct tunnel rams
 

I can't say for sure why his tune had that much timing down low, but he may have had the same issue as my 540. Fuel lighting in the pipes required way more timing down low.

Re: period correct tunnel rams
 

Maybe he was using purple avgas?

Re: period correct tunnel rams
 

I am looking for thease air cleaners do you know who made thease style http://i411.photobucket.com/albums/p...ture218725.jpg

Re: period correct tunnel rams
 

They look like they could be Eelco or Helling &amp; Stelling.

Re: period correct tunnel rams
 

----Yup,,,I was going to stay Stellings too......Bill S

Re: period correct tunnel rams
 

Any for sale out there thanks Brent [img]<<GRAEMLIN_URL>>/beers.gif[/img]

Re: period correct tunnel rams
 

maybe Cal Custom? I am surprised that big motor would even start up on those short stacked air cleaners.

Re: period correct tunnel rams
 

Tony Branda has them.

Re: period correct tunnel rams carbs
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: YENKO DEUCE REGISTRY</div><div class="ubbcode-body">Picked up a pair of 1850's at Carlisle last Friday with the non-plastic vs setup. All there, including choke setups, etc.... Making a little progress here and there!

Now will need to determine how to cut the hood to clear all this stuff! </div></div>

I stumbled onto this old thread...

Eric's got my 1850's now! [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]
http://i61.photobucket.com/albums/h6...psdf5cxame.jpg

http://i61.photobucket.com/albums/h6...pslhknysnx.jpg

http://i61.photobucket.com/albums/h6...ps84lkfoy9.jpg


http://i61.photobucket.com/albums/h6...ps7pj0vo6r.jpg


http://i61.photobucket.com/albums/h6...ps8nvdinkh.jpg

http://i61.photobucket.com/albums/h6...psnammo2sw.jpg

This kid will be the talk of his school!!! Hard to believe he's 15 now. [img]<<GRAEMLIN_URL>>/eek.gif[/img]

http://i61.photobucket.com/albums/h6...aminandSS3.jpg

Re: period correct tunnel rams carbs
 

Small Block Chevy
EDELBROCK.....The Most Productive Tunnel Ram of its time
https://www.yenko.net/ubbthreads/pics...222_163629.jpg
https://www.yenko.net/ubbthreads/pics...222_163924.jpg
https://www.yenko.net/ubbthreads/pics...222_163703.jpg
https://www.yenko.net/ubbthreads/pics...222_163715.jpg
https://www.yenko.net/ubbthreads/pics...222_163828.jpg

Re: period correct tunnel rams carbs
 

Soooo..... how do you hook up the vacuum line for the carbs and brake booster with these TR's??

Re: period correct tunnel rams carbs
 

Drill and tap.

Or run a vacuum canister from a vacuum port off the carb. Will the cam supply enough vacuum at idle? Roughly 15&quot; or so minimum.

Re: period correct tunnel rams carbs
 

Hmm.... no idea. I guess we are going vacuum canister....

Re: period correct tunnel rams carbs
 

I have seen people just running vac off the carb baseplate but I would not think that would be enough volume for the brakes plus I wouldnt consider it safe. I think the canister is the best route or run manual discs.

Gonna join the tunnel ram club and revive an old thread. Yes I know the top plate is backwards. Its all just for looks. I'll be cleaning this one up here soon.

I'm hoping to get a tunnel ram on mine sometime this winter. I've got 2 to choose from, a Offy and a TR2X, but I haven't decided which one to use.

Still running mine, although it's off now while I'm getting the heads redone.

This kid was indeed the talk of the school.....

I bet he was! Among all of the Camrys, Accords and other junk I'm sure that car stood out very bright and loud.

I picked up a few more tunnel rams this week. I've got 5 now. It's a sickness. :tongue:

Need the spacer diffuser plate for the breadbox. Saw one of those blow up at US 30 dragstrip.

The gasser guys are filling the bottom with epoxy.