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Vanke Intake modifications #2626616
02/27/19 03:03 AM
02/27/19 03:03 AM
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Michigan
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Transman Offline OP
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Looking for a print for these mods.

Anyone have them?

Also, any info out there on the jetting packages for same?

Re: Vanke Intake modifications [Re: Transman] #2626669
02/27/19 11:26 AM
02/27/19 11:26 AM
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Marion, South Carolina [><]
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https://board.moparts.org/ubbthreads/upload2/5671605-Vankemod.jpg

I don't have any jetting recommendations. I have one here, but I haven't built the motor yet.

vanke mod.jpg

CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: Vanke Intake modifications [Re: Transman] #2626684
02/27/19 12:10 PM
02/27/19 12:10 PM
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polyspheric Offline
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Can't answer your request, but the manifold is an answer to "what can I do for more peak power, if I'm limited to the original factory casting?".
I would expect weird mixture distribution, less stable idle, more pump shot needed.


Boffin Emeritus
Re: Vanke Intake modifications [Re: Transman] #2626693
02/27/19 12:37 PM
02/27/19 12:37 PM
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Stuttgart, Arkansas
rickseeman Offline
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I believe there is an old Direct Connection publication on jetting for those. (Possibly a print also.) Of course it will matter if you are using normal street hemi carbs or the 4345S/4346S that came on them. If you go look at a real one you can draw your own print. It is simple machining and welding a dam in. Make sure it's a real one you're looking at not one of those god awful jobs that some hack did.


2011 Drag Pak Challenger
Re: Vanke Intake modifications [Re: Transman] #2626722
02/27/19 01:56 PM
02/27/19 01:56 PM
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lewtot184 Offline
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the only info I have is to use the big cheater carbs, without jet changes, in an opened up intake. I think I would be possible to duplicate the cheater carbs with edelbrock 1407's. if this is a driver there will be a noticeable decrease in torque below 4000rpm.

Re: Vanke Intake modifications [Re: Transman] #2626730
02/27/19 02:24 PM
02/27/19 02:24 PM
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Transman Offline OP
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Thanks for the link with the print. Interestingly, unless I am looking at the print incorrectly, there is a radius cut on the secondary portion of the rear carb where the print shows a straight wall. Every one of these manifolds I have seen as of late has this radius.

I understand the potential effect on torque, but being a manual, stroker with headers should make up for any increase in plenum volume. If we end up with one of these plus the standard manifold I would entertain doing an A-B test on the dyno to see total impact.

We have two sets of carbs so that shouldn’t take too long to test.

Thanks for all the contributors to the post.

Re: Vanke Intake modifications [Re: Transman] #2626741
02/27/19 03:05 PM
02/27/19 03:05 PM
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lewtot184 Offline
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stroker/manual; i'd definitely try bigger than stock carbs.

Re: Vanke Intake modifications [Re: Transman] #2626750
02/27/19 03:32 PM
02/27/19 03:32 PM
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Rio Linda, CA
John_Kunkel Online content
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The factory carb mod kit for the Vanke intake was P2836137.

P2836137.jpg

I'm supposed to respect my elders, but its getting harder and harder for me to find one now.
Re: Vanke Intake modifications [Re: Transman] #2626777
02/27/19 04:40 PM
02/27/19 04:40 PM
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Minnesota
Hemi_Joel Offline
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From experience I can tell you, a stroker motor cures any deficiencies in low-end or idle that may have been caused by a Vanke intake modification. My 474 Hemi with a Vanke intake torques out like a locomotive and pulls hard over 7000 RPM. that's not to say that there aren't better choices for an intake, like the stage 5, but if you need to use the stock casting, the Vanke mod is a good start

Re: Vanke Intake modifications [Re: Transman] #2626806
02/27/19 05:31 PM
02/27/19 05:31 PM
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polyspheric Offline
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Partially removing the divider wall makes each bank draw from both left & right sides of both carburetors (the reverse of why 180° manifolds are used). Vacuum signal is reduced, not with this design but any wall height reduction.
Since the manifold itself does not have equal air flow to each port (unavoidable with dual-plane manifolds - read some of Vizard's tests showing as much as 50 CFM difference between high and low) even the original fuel distribution is now gone. The WOT can be made closer by stagger jetting, front-rear bias, HSAB experiments, but not the A:F balance to each cylinder.


Boffin Emeritus
Re: Vanke Intake modifications [Re: Transman] #2626810
02/27/19 05:42 PM
02/27/19 05:42 PM
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New York
polyspheric Offline
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Thanks, John - I suspect a larger photo would show asymmetrical booster venturi notches biasing emulsion discharge off center?


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Re: Vanke Intake modifications [Re: Transman] #2626981
02/28/19 02:44 AM
02/28/19 02:44 AM
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Transman Offline OP
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Booster throats are all equal in size. No sniveys or notches in any of them.

Last edited by Transman; 02/28/19 11:50 AM.
Re: Vanke Intake modifications [Re: lewtot184] #2627049
02/28/19 12:31 PM
02/28/19 12:31 PM
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Marion, South Carolina [><]
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Originally Posted By lewtot184
stroker/manual; i'd definitely try bigger than stock carbs.

iagree The Vanke manifold I have is going on a mild 540" street motor w/ a 4 speed behind it. Have an older pair of Carter comp 750s for it.


CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: Vanke Intake modifications [Re: Transman] #2627068
02/28/19 01:09 PM
02/28/19 01:09 PM
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New York
polyspheric Offline
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Why are they being replaced?


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Re: Vanke Intake modifications [Re: Transman] #2627096
02/28/19 02:20 PM
02/28/19 02:20 PM
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central il.
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second 70 Offline
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Here is a picture of the KB marine intake. The mods are similar to the Vanke but have the bases farther apart so you can use Holleys.

1394C74F-A2E6-4224-826E-54C3A0A8A84A.jpeg0E0DC55C-641D-4CFB-863B-56D31DDE0177.jpeg0F4CFA3A-F4B8-4FCF-B66C-20CE613D138D.jpeg
Last edited by second 70; 02/28/19 03:00 PM.
Re: Vanke Intake modifications [Re: Transman] #2627105
02/28/19 02:33 PM
02/28/19 02:33 PM
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Stuttgart, Arkansas
rickseeman Offline
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Yes, that is a copy of the old KB "Marine" intake for Holleys and they came modded like the Vanke.


2011 Drag Pak Challenger
Re: Vanke Intake modifications [Re: Transman] #2627153
02/28/19 04:35 PM
02/28/19 04:35 PM
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Chicago Blackhawks
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I use to have some Dyno pull information from years ago and will see if I can dig them up but never went that way so likely it went into garbage. Also believe NHOA had put in their News Letter in the 80s the jetting used when going from a stock intake to a modified Vank intake and I believe it was on a stock motor. This is what I can remember from the dyno test on intakes. Gain from stock to Vank was around 40 HP and then using the Stage V intake it gained about 75 HP. I can not remember what changes were used for carbs and even how much if any modifications the Hemi Motor had.


1971 HEMI E BODY REGISTRY
Re: Vanke Intake modifications [Re: Transman] #2627228
02/28/19 08:39 PM
02/28/19 08:39 PM
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polyspheric Offline
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That's some precision machining there, Bubba.
There's actual math for "how much less does an orifice flow if the entry is a sharp-enough-to-shave-with edge?", and it's not good.


Boffin Emeritus
Re: Vanke Intake modifications [Re: Transman] #2627376
03/01/19 02:11 AM
03/01/19 02:11 AM
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Stuttgart, Arkansas
rickseeman Offline
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OT but FYI I had a pair of Holleys for the KB Marine intake once. In case anybody is wondering I believe the numbers are 4127/4128. Mine were built by Bauman I believe, based on the handwriting. They were made from 3116 carbs. I wish I would have put that intake and carbs on something and drove it. Someone later told me not to use staged linkage with those. Have both primaries open together. I asked KB once how many of those intakes he made. He said he didn't remember for sure, maybe 75. Just passing on the info.


2011 Drag Pak Challenger
Re: Vanke Intake modifications [Re: polyspheric] #2627406
03/01/19 08:46 AM
03/01/19 08:46 AM
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Originally Posted By polyspheric
That's some precision machining there, Bubba.
There's actual math for "how much less does an orifice flow if the entry is a sharp-enough-to-shave-with edge?", and it's not good.


I was looking at the picture and also thinking why didn't they radius and blend it.

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