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Hemi Bathtub Single 4 Intakes - Anybody tried one? #2881123
01/27/21 10:30 PM
01/27/21 10:30 PM
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440gtx6 Offline OP
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Does anyone here have any experience with these?
From what I've been told, they're not really suited for drag racing but are they efficient enough for some street drivability as well as on an oval track?

Do they have the fuel puddling and distribution problems of the old rat roaster style intakes?



[img]https://imgur.com/ksk15eo[/img]

20200826_184855.jpg

69 EF8 GTX 440 auto
72 EB5 RR/GTX 440 auto
70 EW1 GTX 440-6 4 spd
70 EF8 Satellite 318 auto (452 coming soon)
70 FK5 Satellite 318 auto
71 FC7 Cuda 340 4 spd
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881149
01/28/21 12:10 AM
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Yeah have fun getting that intake to work on the street. Might work when it gets hot but I bet it runs like crud when cold. Keep the car in a heated garage and you might have a chance. I have a buddy with an old NASCAR car that has that setup on it.

DSC_0796 (Large).JPG
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: AndyF] #2881167
01/28/21 01:40 AM
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440gtx6 Offline OP
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Not expecting it to be a daily driver or even in cold weather so I expected that.

Also would like to hear of any experiences with interior baffle modifications needed to avoid fuel puddling in one end.

Most of these seem to have the baffles or dividers cast in but the one in my pic does not.


69 EF8 GTX 440 auto
72 EB5 RR/GTX 440 auto
70 EW1 GTX 440-6 4 spd
70 EF8 Satellite 318 auto (452 coming soon)
70 FK5 Satellite 318 auto
71 FC7 Cuda 340 4 spd
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: AndyF] #2881168
01/28/21 01:43 AM
01/28/21 01:43 AM
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Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: polyspheric] #2881169
01/28/21 01:58 AM
01/28/21 01:58 AM
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440gtx6 Offline OP
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That sounds like worth a try, I was thinking it could be tuned that way. Probably going to take some trial and error and testing.

Thanks for the help!


69 EF8 GTX 440 auto
72 EB5 RR/GTX 440 auto
70 EW1 GTX 440-6 4 spd
70 EF8 Satellite 318 auto (452 coming soon)
70 FK5 Satellite 318 auto
71 FC7 Cuda 340 4 spd
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881171
01/28/21 02:30 AM
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I had a customer in SO CA high desert (4000+ Ft.) that had bought a 1966 or 1967 clone Plymouth NASCAR of Marty Robbins old race car that had one of those intakes on it that I worked on, it had extensive mods in the intake from Petty Ent. I think.
I rebuilt it with a 4 250 stroke crank assembly set up for pump gas back in 2000 or so, I dyno that motor and it had the best EGT readings I have ever seen on any carbureted Mopar motor up It would level off above 900 RPM to have within 50 degrees F on all 8 EGT and hold that from light part throttle to WOT up to 7500 RPM up
I didn't think to take pictures or draw a picture of those mods, DANG IT realcrazy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881172
01/28/21 02:31 AM
01/28/21 02:31 AM
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20 years ago a friend had the nascar intake on his 64. He made a top out of 1/4” aluminum with two AFB carbs, cross ram. He drove it 50 miles to shows once a week plus around town a lot but never said anything about any problems with it. Haven’t talked with him in awhile so I might call and ask him. To me it sounded good, fired right up and no attitude when leaving the shows.

Last edited by cudaman1969; 01/28/21 02:36 AM.
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: polyspheric] #2881476
01/28/21 09:49 PM
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Are these cast in divider walls similar to what you're suggesting. This seems to maybe be a later version than the one I posted above?

[img]https://imgur.com/31ph97p[/img]

Aluminum bathtub intake 002.JPG
Last edited by 440gtx6; 01/28/21 09:50 PM.

69 EF8 GTX 440 auto
72 EB5 RR/GTX 440 auto
70 EW1 GTX 440-6 4 spd
70 EF8 Satellite 318 auto (452 coming soon)
70 FK5 Satellite 318 auto
71 FC7 Cuda 340 4 spd
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881480
01/28/21 10:04 PM
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Last edited by Transman; 02/09/21 09:43 AM.
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881491
01/28/21 11:02 PM
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The one he had was a NASCAR application like shown on the blue car in Andy F picture scope, not a Eddy Hemi two piece intake like the rat roadster or the other variety of them tsk


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: cudaman1969] #2881533
01/29/21 01:01 AM
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Originally Posted by cudaman1969
20 years ago a friend had the nascar intake on his 64. He made a top out of 1/4” aluminum with two AFB carbs, cross ram. He drove it 50 miles to shows once a week plus around town a lot but never said anything about any problems with it. Haven’t talked with him in awhile so I might call and ask him. To me it sounded good, fired right up and no attitude when leaving the shows.


Dean Nicopolis had one with a crossram top. It looked like it would work better than the single 4bbl to me. My thought is two of the Autolite inline 4bbl carbs might be a trick way (and expensive) to go with that bottom.


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Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881828
01/29/21 07:49 PM
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How do any of the bases become cross ram, which requires each carburetor to feed only the bank of port extensions on the opposite side?


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Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: polyspheric] #2881843
01/29/21 08:50 PM
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440gtx6 Offline OP
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Don't the dividers like in my second pic do that? At least with the single 4 top, looks like that was the intention anyway.

01292021.jpg

69 EF8 GTX 440 auto
72 EB5 RR/GTX 440 auto
70 EW1 GTX 440-6 4 spd
70 EF8 Satellite 318 auto (452 coming soon)
70 FK5 Satellite 318 auto
71 FC7 Cuda 340 4 spd
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881860
01/29/21 09:29 PM
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Last edited by Transman; 02/09/21 09:44 AM.
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: A727Tflite] #2881913
01/29/21 11:57 PM
01/29/21 11:57 PM
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440gtx6 Offline OP
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Yep, agreed.

The single 4 top seems to be a compromise to follow the rules and also maintain hood clearance.

On the other hand it must have provided some performance benefit otherwise why did most hemis use it in place of the earlier single 4 nascar dual plane.


69 EF8 GTX 440 auto
72 EB5 RR/GTX 440 auto
70 EW1 GTX 440-6 4 spd
70 EF8 Satellite 318 auto (452 coming soon)
70 FK5 Satellite 318 auto
71 FC7 Cuda 340 4 spd
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2881986
01/30/21 11:04 AM
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Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: 440gtx6] #2882060
01/30/21 02:34 PM
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Last edited by Transman; 02/09/21 09:45 AM.
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: A727Tflite] #2882129
01/30/21 07:25 PM
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I have had one of these manifolds for over 40 years. Used it on an A/SM hemi Cuda and now on a 426 Hemi powered Model A. At the 2014 Mopars at the Strip, when Tom Hoover and the Ramchargers autographed the dash. Tom Hoover said he never could get that manifold to work the way he wanted. Oh, and by the way, it will be for sale when I install the stack injection back on the Hemi.

Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: mopacltd] #2882211
01/30/21 10:55 PM
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Apparently it worked well enough for Charlie Glotzbach to go 200+ in the Daytona.


69 EF8 GTX 440 auto
72 EB5 RR/GTX 440 auto
70 EW1 GTX 440-6 4 spd
70 EF8 Satellite 318 auto (452 coming soon)
70 FK5 Satellite 318 auto
71 FC7 Cuda 340 4 spd
Re: Hemi Bathtub Single 4 Intakes - Anybody tried one? [Re: mopacltd] #2882214
01/30/21 11:05 PM
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Last edited by Transman; 02/09/21 09:46 AM.
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