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New tunnel ram top #3003317
01/08/22 11:24 PM
01/08/22 11:24 PM
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CEDAR RAPIDS
Plymouth340 Offline OP
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I built this dual 4 Barrel tunnel ram top with sheer plates. What are your thoughts how it will work? For a 800 HP W7 small block

20211220_131313 (2).jpg
Last edited by Plymouth340; 01/10/22 03:22 PM.
Re: New tunnel ram top [Re: Plymouth340] #3003326
01/08/22 11:57 PM
01/08/22 11:57 PM
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Bend,OR USA
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Try it and let us know your results wrench up
Good luck, it looks really good bow up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: New tunnel ram top [Re: Cab_Burge] #3003485
01/09/22 03:19 PM
01/09/22 03:19 PM
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north of coder
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"Butt Crack Bob"
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very NICE fab work ! up bow
as Cab said, please let us know how it works !
beer

Re: New tunnel ram top [Re: Plymouth340] #3003494
01/09/22 04:15 PM
01/09/22 04:15 PM
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United Socialist States of Ame...
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tboomer Online work
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Looks nice Mike!


The end is near.....
Re: New tunnel ram top [Re: tboomer] #3003671
01/09/22 11:41 PM
01/09/22 11:41 PM
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Melbourne , Australia
LA360 Offline
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All the tunnel ram intake tops I've seen have a 3D machined insert that the shear plate fitted on to. They usually just featured a radius to transition from the carb to the plenum.


Alan Jones
Re: New tunnel ram top [Re: LA360] #3003692
01/10/22 02:03 AM
01/10/22 02:03 AM
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Posts: 501
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Plymouth340 Offline OP
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Originally Posted by LA360
All the tunnel ram intake tops I've seen have a 3D machined insert that the shear plate fitted on to. They usually just featured a radius to transition from the carb to the plenum.

20211220_120358.jpg
Last edited by Plymouth340; 01/10/22 03:24 PM.
Re: New tunnel ram top [Re: Plymouth340] #3003698
01/10/22 03:01 AM
01/10/22 03:01 AM
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Reversion plates are worth some HP on engine dyno tests I've done up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: New tunnel ram top [Re: Plymouth340] #3003715
01/10/22 09:13 AM
01/10/22 09:13 AM
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Shelby Twp. Mi
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From what I can see everything 'looks' right. Are the runners optimized to your application? Regardless, if you've converted a single 4 top to the dual top, I'd say that'll show some measurable gains! The anti-revesion plates as has been mentioned will help too. What's going on top of those???

Re: New tunnel ram top [Re: HardcoreB] #3003835
01/10/22 03:02 PM
01/10/22 03:02 PM
Joined: Feb 2006
Posts: 501
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Plymouth340 Offline OP
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Originally Posted by HardcoreB
From what I can see everything 'looks' right. Are the runners optimized to your application? Regardless, if you've converted a single 4 top to the dual top, I'd say that'll show some measurable gains! The anti-revesion plates as has been mentioned will help too. What's going on top of those???


Got two APD 950s coming ...before i was running a single 1200 on this tunnel ram

Re: New tunnel ram top [Re: Plymouth340] #3004823
01/13/22 10:28 AM
01/13/22 10:28 AM
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Shelby Twp. Mi
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Originally Posted by Plymouth340
Originally Posted by HardcoreB
From what I can see everything 'looks' right. Are the runners optimized to your application? Regardless, if you've converted a single 4 top to the dual top, I'd say that'll show some measurable gains! The anti-revesion plates as has been mentioned will help too. What's going on top of those???


Got two APD 950s coming ...before i was running a single 1200 on this tunnel ram


Nearly every time I see or hear 'sheer plates' I assume 'ANTI-REVERSION' is what was meant but, I'd be wrong. I'd pop for a good pair of anti-reversion plates (for a number of reasons) and make whatever mods are necessary to fit those. In my experiences, 'those' will almost certainly show improvement on 'line-of-sight' runner orientation configurations. Wilson are the one's I've seen and used but there are others that are THAT STYLE that'll work. Other brands just don't come to mind ATM.

Re: New tunnel ram top [Re: HardcoreB] #3005416
01/15/22 12:19 AM
01/15/22 12:19 AM
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Plymouth340 Offline OP
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Originally Posted by HardcoreB
Originally Posted by Plymouth340
Originally Posted by HardcoreB
From what I can see everything 'looks' right. Are the runners optimized to your application? Regardless, if you've converted a single 4 top to the dual top, I'd say that'll show some measurable gains! The anti-revesion plates as has been mentioned will help too. What's going on top of those???


Got two APD 950s coming ...before i was running a single 1200 on this tunnel ram


Nearly every time I see or hear 'sheer plates' I assume 'ANTI-REVERSION' is what was meant but, I'd be wrong. I'd pop for a good pair of anti-reversion plates (for a number of reasons) and make whatever mods are necessary to fit those. In my experiences, 'those' will almost certainly show improvement on 'line-of-sight' runner orientation configurations. Wilson are the one's I've seen and used but there are others that are THAT STYLE that'll work. Other brands just don't come to mind ATM.


So what is the difference between sheer plates and anti reversion plates? On Wilson manifolds website I see nothing that's said anti-reversion plate

Re: New tunnel ram top [Re: Plymouth340] #3005824
01/16/22 03:32 AM
01/16/22 03:32 AM
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Melbourne , Australia
LA360 Offline
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Originally Posted by Plymouth340
Originally Posted by HardcoreB
Originally Posted by Plymouth340
Originally Posted by HardcoreB
From what I can see everything 'looks' right. Are the runners optimized to your application? Regardless, if you've converted a single 4 top to the dual top, I'd say that'll show some measurable gains! The anti-revesion plates as has been mentioned will help too. What's going on top of those???


Got two APD 950s coming ...before i was running a single 1200 on this tunnel ram


Nearly every time I see or hear 'sheer plates' I assume 'ANTI-REVERSION' is what was meant but, I'd be wrong. I'd pop for a good pair of anti-reversion plates (for a number of reasons) and make whatever mods are necessary to fit those. In my experiences, 'those' will almost certainly show improvement on 'line-of-sight' runner orientation configurations. Wilson are the one's I've seen and used but there are others that are THAT STYLE that'll work. Other brands just don't come to mind ATM.


So what is the difference between sheer plates and anti reversion plates? On Wilson manifolds website I see nothing that's said anti-reversion plate


They are the same thing from what I have been lead to believe. Any others I refer to as a transition spacer. I took this information from a podcast or video with Darin Morgan. I figure he knows more than I do.


Alan Jones
Re: New tunnel ram top [Re: LA360] #3005831
01/16/22 03:40 AM
01/16/22 03:40 AM
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Melbourne , Australia
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I will attach some examples, hopefully it works

Open transition for a shear plate

20220107_172240.jpg

Alan Jones
Re: New tunnel ram top [Re: LA360] #3005833
01/16/22 03:41 AM
01/16/22 03:41 AM
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Melbourne , Australia
LA360 Offline
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4 hole transition spacer

20220106_150221.jpg

Alan Jones
Re: New tunnel ram top [Re: LA360] #3005840
01/16/22 03:47 AM
01/16/22 03:47 AM
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LA360 Offline
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Shear/Anti Reversion Plate

20220116_183640.jpg

Alan Jones
Re: New tunnel ram top [Re: LA360] #3005842
01/16/22 03:51 AM
01/16/22 03:51 AM
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This is the type of insert I referred to earlier

open_manifold_shear_plate-1.jpg

Alan Jones
Re: New tunnel ram top [Re: LA360] #3006436
01/18/22 10:05 AM
01/18/22 10:05 AM
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Shelby Twp. Mi
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The extended cones do a good job keeping direct pulses from 'talking' to the carbs, that is the specific type I was mentioning. Thanks for the pics Alan.

Re: New tunnel ram top [Re: HardcoreB] #3006526
01/18/22 01:34 PM
01/18/22 01:34 PM
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Plymouth340 Offline OP
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This is the shear plate i'm using on top of my tunnel ram

20220118_112905[1163].jpg
Re: New tunnel ram top [Re: Plymouth340] #3006535
01/18/22 01:48 PM
01/18/22 01:48 PM
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Motor City
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I did the same with my top. I also made white nylon spacer for heat dissipation on the street. If you look closely you can see it sandwiched in there.

IMG_8664.jpg

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1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
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Re: New tunnel ram top [Re: 6PKRTSE] #3006592
01/18/22 07:06 PM
01/18/22 07:06 PM
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Plymouth340 Offline OP
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Originally Posted by 6PKRTSE
I did the same with my top. I also made white nylon spacer for heat dissipation on the street. If you look closely you can see it sandwiched in there.


Looks good

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