Tunnel Ram Carbs

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Tunnel Ram Carbs

Post  dbshelton on April 2nd 2018, 9:38 pm

I am putting together a .030" over 460. 10.5:1 compression, Eagle ESP rods, SCJ aluminum heads, Howards .640/.635 lift, 260/268 @.050 solid cam. C6 auto with 3.73 rear gears in a 65 Falcon. Gonna top it with a Weiand tunnel ram. What suggestions for carbs? I have a pair of 450 cfm carbs, 390 cfm carbs, and also a set of 600 cfm 1850 Holleys. Is there a better choice?
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Re: Tunnel Ram Carbs

Post  DeepRoots on April 2nd 2018, 11:45 pm

I'd go with 600's for a driver.


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Re: Tunnel Ram Carbs

Post  rmcomprandy on April 3rd 2018, 12:25 am

Something with small enough primary's where you can use 1 to 1 linkage, (not progressive), from carb to carb; it will drive so much better.

If wide open throttle is your concern; put a pair of 1,050 Dominators on it.

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Re: Tunnel Ram Carbs

Post  dbshelton on April 3rd 2018, 7:05 am

Right now the 600 carbs are on the Blue Thunder intake on my 521 and work pretty well. Guess I will see if I can find another pair.
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Re: Tunnel Ram Carbs

Post  DeepRoots on April 3rd 2018, 9:19 am

I'm about to go back to work, but I'll be back the first week of May and will be building 3-4 sets of dual 1850's if you are interested.
An example:

https://www.facebook.com/pg/AirFuelSParkTech/photos/?tab=album&album_id=225187201553352

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750 Edelbrocks

Post  57ford custom on April 3rd 2018, 10:31 am

I put a pair of 750 factory renewed Edelbrocks on mine and the only difference of mine from yours was it had DOOER iron cobra jet heads and a milder flat tappet cam and more compression. It was very responsive and made 596 hp and ran a 7.09 in the 1/8th. Like I said they were factory rebuilt's or returns and the price was very reasonable. It started great and was easy to set the idle. In fact when the now 526 goes on the dyno this month they will be the first carbs to use for the test. I have a different top for my Weiand and will do a test with a pair of 750 vacum secondary's on the same top and the other top is modified for an older pair of 1050 dominators. I am planning on posting the results on here. Very Happy
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Re: Tunnel Ram Carbs

Post  dbshelton on June 23rd 2018, 9:58 pm

Finally got around to finishing my run-in stand and starting my engine to break-in the cam today. Started it with a pair of 450 Holley carbs I had and it really sounds pretty good.
I have a pair of 1850 600cfm Holley carbs I cut the choke horns off that i will clean up and rebuild tomorrow to put on it. I have never run a tunnel ram intake before and am wondering if anyone may have some kind of baseline to start with on these carbs. Maybe a starting jet size, Power valve number? Not exactly sure where to start. I know I will have to tune it later when the car is running but any suggestions for now?
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Re: Tunnel Ram Carbs

Post  gt350hr on June 25th 2018, 1:25 pm

How do you like the Blue Thunder dual four intake?

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Re: Tunnel Ram Carbs

Post  DaveMcLain on June 25th 2018, 1:28 pm

Two Kendig/Predators would be very tough to beat on a tunnel ram.

I know a guy who had one of those dual quad dual planes from Blue Thunder on a 514 and it ran excellent with two of the old Carter Competition Series AFB's. Nice and drivable yet still ran pretty hard.

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Re: Tunnel Ram Carbs

Post  dbshelton on June 26th 2018, 6:58 am

gt350hr wrote:   How do you like the Blue Thunder dual four intake?

On my 521 in the Galaxie it works very well. Drivability on the street is very good.
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Re: Tunnel Ram Carbs

Post  dbshelton on June 26th 2018, 7:00 am

DaveMcLain wrote:Two Kendig/Predators would be very tough to beat on a tunnel ram.

Are they very streetable?
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Re: Tunnel Ram Carbs

Post  DaveMcLain on June 26th 2018, 7:52 am

dbshelton wrote:
DaveMcLain wrote:Two Kendig/Predators would be very tough to beat on a tunnel ram.

Are they very streetable?

Sure can be yes.

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Re: Tunnel Ram Carbs

Post  DanE on June 26th 2018, 10:27 am

In reference to the Blue Thunder dual quad, dual plane intake manifold for standard heads, I bought one for my mid range, high torque 502/460. Before being ported by "The Mad Porter", the manifold flowed around 260 CFM with uneven flow between runners. After being ported, the intake manifold flowed around 315 CFM, with fairly even flow between runners. The 315 CFM flow was while the intake was bolted to a set of C9's that "The Mad Porter" had valved and ported.

For carburetion, The engine will have 2, 625 CFM, Street Demon carburetors. They were chosen for their small primaries and a large secondary. They will be run on a 1 to 1 ratio, both sets of primaries working as one.

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Re: Tunnel Ram Carbs

Post  Mustang-junky on June 26th 2018, 9:36 pm

I have a pair of Predator carbs and some extra cams for them if anyone is interested in them.

Jess
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Re: Tunnel Ram Carbs

Post  dbshelton on June 26th 2018, 10:13 pm

Anyone run a pair of Holley 80459 750 cfm carbs?
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