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Discussion Starter · #1 ·
Ok I suspect I know the answer to this but can you set up a tunnel ram on a fairly wild 355SBC or 396SBC running a pair of 3310 carbs?

Please be gentle....lol
 
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Duane, i'm certainly no carb specialist but don't they use something like a 660 center squirter on T/Rams ???

i'd think yer talking LOTS of carb... maybe a tad too-TOO much ??? maybe ???
 

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Discussion Starter · #3 ·
Ya that is what I was thinking too. I asked Mr Cuppy this question and he said he has done it in the past and it works surpising well...that answer surpised me a lot..:) :cool:
 
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i have a lot of respect for Mr Cuppy. i've talked to him quite a few times when i had some concerns about my package. a real down to earth guy... always a pleasant guy ta talk to... if he said you'd be cool... hey man, yer in like Flint !!! (showing my age ;) )


so with all that money ya been savin' up, ya almost ready ta cut some of it loose and go wild ??? :D
 

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Discussion Starter · #5 ·
When I retrn from the second round in Japan I suspect there will be some parts purchases in my future. I'm still not 100% sure which direction I will be going...but I have another 2 months to research it some more. I know what way I want to go overall with the car its just the fine details I need to nail down.....and as we know its the fine details that make the world of difference in the final product.;)
 

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Discussion Starter · #7 ·
Ummmmm....welll.......hmmmmmmm.......ummmm........I think I will take the 5th on this and any question that may follow it:D
 

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I'd have to ask are they 650 or 750 double pumpers first? At 750 cfm (1500 total cfm) you might be offering way to much of a good thing to a 355. I used to run two 660 center squirters on my old 427 and a Weiand tunnel ram and though they were God's gift to the world, absolutely loved them. Their cam is a little less brutal than that of the DP on opening rates.

Big Dave
 

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Discussion Starter · #9 · (Edited)
I believe the 3310's only came as Vacuum Secondary carbs however they did come in two different CFM size. 780cfm for the early ones and 750cfm for the later ones. Though in theory the total CFM they might flow is 1500cfm since they are vacuum operated they will only open the secondaries the amount the motor needs so they are sorta self regulating and will likely NEVER flow anywhere near the potential conbined 1500cfm mark.....or at least that is how I understand it:eek: :)
 

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My error List 0-3310C is a universal vacuum secondary 750 cfm 4160 carb; I was confused. Thought it was a double pumper. Should work well as unless you pull enough vacuum, the back barrels will never open, so it shouldn't be over carburated even on a 355. Plus multiple carbs will look good on top of an engine.

Sorry for the confusion.

Big Dave
 

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Don't use 660s the carbs to use if you are serious is the 6109 750 DP. I know they are too big for most apps but the carbs are so much better than the 660s that they are really the only choice. You can try the 450 vacuum carbs on your 355 they can be made to work quite well and almost run correctly on a street motor.
 

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If you install a heavier spring in the secondaries it might just work . I'm glad I don't have your Mobil bill though.
 

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3310's in my opinion are junk and the only holley carb that is worse is the 1850.

When you say "fairly wild" I am thinking you will be way better off with a single 650 to 750 double pumper.

MORE DETAILS PLEASE and i might be able to help.

Nothing worse than someone 1)mounting an archaic crap intake 2)bolting two crap carbs on it 3)making or buying a linkage for the above 4)cutting a hideous hole in their hood so 5)it can bog and run like C-R-A-P!

LOL
 

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So, Lump, tell us how you really feel. Don't hold back!

Do you have anything better than just "the stuff I like roolz, the stuff you like sux!!!!!" Like actual experience or something?
 

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This is my first post, I'll try to not make an ass out of myself, But when I was younger and so much smarter, I ran 2 x 780 cfm on a tunnel ram, they did work ok, not great, I used the yellow springs, changed the squirters to #37 tube type, sync'd the seconderies, plugged the pv's and jetted way up on the primary side {72's to 84's} on mine.
I turned a lot of rpm with this setup, and sprayed it with a 100 shot under each carb, hope this helps a little.
 

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So, Lump, tell us how you really feel. Don't hold back!

Do you have anything better than just "the stuff I like roolz, the stuff you like sux!!!!!" Like actual experience or something?

Do you want "politically correct" or "straight from the heart?"

I do have actual experience Tom. I had two 3310's about 15 years ago, a couple of 1850's that went straight in the garbage (I was 16 and didn't know better), let's see i've ran damn near every size in dp's, 650, 750, 850, 1050 dominator, 1250 dominator, custom 1350ish dominator, twin pro systems dominators on a big chief 632. Now i have ditched carbs all together and learning efi - i have two engines a big block and a small block both symmetrical port heads and both will make over 2000hp and street driven. what else ya wanna know? LOL

In all of my experience a well tuned DP will run circles around a vacuum secondaries carbs. I wouldn't even put a 3310 on my grandmaw's car!

That goes double for tunnel rams. You generally need all the accelerator pumps you can get because when you crack it open there is a poor signal to get the fuel moving (or to open the secondaries) so you need the pump shot to cover the hole.
 

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Do you want "politically correct" or "straight from the heart?"

How about just be like you are on the Chevelle site??!! ;) I agree, EFI is my only direction for the past several years. I did have good luck in the past with tunnel rams and 4224's (660's) once the metering blocks were re-worked a bit, or my favorite, the 6109's (750's) with mechanical secondaries that could still fit inline on a tunnel ram.

Jody
 

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I have to agree with Lump except if you just have to have the tunnel ram for looks, the 390 vacuum secondary or, my choice, Edelbrock 500cfm carbs would be a better choice.
3310's are for people who can't afford a real carb.
If going fast is the goal and driveability is not much of a concern, call Barry Grant or Holley for set up carbs. You will be glad you did.
 

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i use the old 3310-1, the real 780 cfm not the modern 3310-2 750. the old style 3310's have front and rear metering blocks and are fully adjustable to use as a VS or DP carb if you know how to modify it(all it takes is a screw and a nut). we used them for years and ran in the 10's in the 1/4 w/nitrous. im using one now on my 355.. jmho
 
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