Re: Tunnel Ram
[Re: slomoshun]
#3265447
10/20/24 10:14 PM
10/20/24 10:14 PM
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Joined: Jan 2003
Posts: 21,341
Eagle, Idaho
Neil
The Doctor is in.
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The Doctor is in.
Joined: Jan 2003
Posts: 21,341
Eagle, Idaho
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A tunnel ram with only one carburetor? Seen an Engine Masters video where the single carb on a vintage tunnel ram was shown to be a less than a great idea. Difficult to get the AF ratios on all 8 cylinders to be on the same page was the issue they had with it from memory
Last edited by Neil; 10/20/24 10:14 PM.
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Re: Tunnel Ram
[Re: slomoshun]
#3265762
10/22/24 07:01 AM
10/22/24 07:01 AM
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Joined: Jan 2003
Posts: 4,262
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,262
Shelby Twp. Mi
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Basic info
596 cu in 572-13 heads
my question is is there any horsepower gain going from a 3x intake with 2 inch spacer to a tunnel Ram. Have to Run a single 4 barrel carb. If so how much gain In a word...NO. There are improvements in having the 3x professionally ported but, it works really well overall. You might gain something having a sheetmetal intake done being it's pretty large CID but, you can make over 1100 with a 3x.
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Re: Tunnel Ram
[Re: HardcoreB]
#3265765
10/22/24 07:42 AM
10/22/24 07:42 AM
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Joined: Jan 2003
Posts: 10,138
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,138
Frostbitefalls MN (Rocky&Bullw...
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Basic info
596 cu in 572-13 heads
my question is is there any horsepower gain going from a 3x intake with 2 inch spacer to a tunnel Ram. Have to Run a single 4 barrel carb. If so how much gain In a word...NO. There are improvements in having the 3x professionally ported but, it works really well overall. You might gain something having a sheetmetal intake done being it's pretty large CID but, you can make over 1100 with a 3x. Sean, since i have a Wilson ported 3x, that raises the question of any advantage going to an Indy tunnelram and two terminaters versus my single terminater/ported 3x?
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Tunnel Ram
[Re: HardcoreB]
#3265781
10/22/24 10:07 AM
10/22/24 10:07 AM
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Joined: Jan 2003
Posts: 3,003
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 3,003
A shed in England
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Basic info
596 cu in 572-13 heads
my question is is there any horsepower gain going from a 3x intake with 2 inch spacer to a tunnel Ram. Have to Run a single 4 barrel carb. If so how much gain In a word...NO. There are improvements in having the 3x professionally ported but, it works really well overall. You might gain something having a sheetmetal intake done being it's pretty large CID but, you can make over 1100 with a 3x. We've ran the basically the same mph and only 0.06 quicker in et (best for best) going from a cleaned up 3X to a cleaned up T/R. I think it's over carbed anyway being a mildish 580 with 2 x1150 dominators on it but they look way cool 
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Tunnel Ram
[Re: Tig]
#3265799
10/22/24 11:11 AM
10/22/24 11:11 AM
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Joined: Jan 2003
Posts: 19,586
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,586
Las Vegas
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FWIW at best comparing a really good single 4 to a good 2x4 tunnel ram you are looking at 30ish HP. If you have a marginal single 4 intake then the gains will be larger. As for going to a single TR if it is done properly with the correct plenum I would think 10-15hp over a good cast single 4. Of course there are other variables and Im talking all out no expense spared stuff. Seen it MANY times on the dyno with SS and Comp stuff
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Tunnel Ram
[Re: gregsdart]
#3265842
10/22/24 02:17 PM
10/22/24 02:17 PM
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Joined: Jan 2003
Posts: 4,262
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,262
Shelby Twp. Mi
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Basic info
596 cu in 572-13 heads
my question is is there any horsepower gain going from a 3x intake with 2 inch spacer to a tunnel Ram. Have to Run a single 4 barrel carb. If so how much gain In a word...NO. There are improvements in having the 3x professionally ported but, it works really well overall. You might gain something having a sheetmetal intake done being it's pretty large CID but, you can make over 1100 with a 3x. Sean, since i have a Wilson ported 3x, that raises the question of any advantage going to an Indy tunnelram and two terminaters versus my single terminater/ported 3x? Based on the tunnel ram I'm using (I'd guess whatever cast indy is the same) I'd say you'll make more power with the 3x.
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