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Anyone got a tri-power smallblock?

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Old Jul 11, 2008 | 11:01 PM
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Default Anyone got a tri-power smallblock?

Anyone running a 3 deuce on a small block? You got pictures? Info? Pros and cons? How easy was it to set up? Your top end combo?

I would love to do this set up, but I feel like I cannot find any information on it. Vintagespeed.com offers them packaged up, but absolutely no information about the systems requirements or outputs.

Where are you 3-deucers?
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Old Jul 11, 2008 | 11:04 PM
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63mako has one that he set up. try giving him a pm.
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Old Jul 11, 2008 | 11:07 PM
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Originally Posted by 2000FRCZ19
63mako has one that he set up. try giving him a pm.
ya, on all the searches I've done, I think I've seen his set up in every single thread. He sounds like he really complicated the issue, at least for me. He made personal modifications whereas I'm looking for something thats as close to off-the-shelf as possible.
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Old Jul 12, 2008 | 12:53 AM
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barry grant has a very nice set up unless you are wanting to stay closer to original style. i would also love to go with a 3 duce set up but have not done it because i am afraid of having to mess with them all the time. i dont really know enough about them to know for sure if they would be all that bad to have. maybe this thread will shed some light on this.
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Old Jul 12, 2008 | 09:56 AM
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Originally Posted by 2000FRCZ19
i would also love to go with a 3 duce set up but have not done it because i am afraid of having to mess with them all the time. i dont really know enough about them to know for sure if they would be all that bad to have. maybe this thread will shed some light on this.
That was my exact reason for starting the thread. I've heard that "having to mess with them all the time" is folklore, but that the initial tune is pretty hard to set up.
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Old Jul 12, 2008 | 10:29 AM
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Running multi carbs and having to fuss with them all the time is folklore indeed . I run a multi carb setup on my 82 and have not touched it in years .There are good setups available and good linkage is the key to satisfactory operation .


gman
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Old Jul 12, 2008 | 10:31 AM
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Originally Posted by ram82fire
Running multi carbs and having to fuss with them all the time is folklore indeed . I run a multi carb setup on my 82 and have not touched it in years .There are good setups available and good linkage is the key to satisfactory operation .


gman
thanks gman. Do you have a picture of your set up? Where did you get it from? Also what cam/heads are you using?
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Old Jul 12, 2008 | 03:11 PM
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Originally Posted by 2000FRCZ19
barry grant has a very nice set up unless you are wanting to stay closer to original style. i would also love to go with a 3 duce set up but have not done it because i am afraid of having to mess with them all the time. i dont really know enough about them to know for sure if they would be all that bad to have. maybe this thread will shed some light on this.
I've been looking at the Barry Grants for awhile. My understanding, these are easier to put on than the originals and you don't have to mess with them. I'm basically holding out il I decide on which engine to go with.
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Old Jul 12, 2008 | 03:16 PM
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Originally Posted by milo30
I've been looking at the Barry Grants for awhile. My understanding, these are easier to put on than the originals and you don't have to mess with them. I'm basically holding out il I decide on which engine to go with.
Originals? There weren't any original small blocks with tri-power, but I'm not sure if original 2-barrels will flange up to any size manifold either. Besides, the costs of acquiring original 2-barrels makes the effort pointless.

I'm a fan of what Vintage Speed has. I like the old look of their set up, especially if I put a triangle air cleaner on it. I read an article once in Corvette Fever in the past few months about someone doing this in a C1, but I can't find the article anymore.
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Old Jul 12, 2008 | 04:46 PM
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Default BG set up

This month's Corvette Fever has a nice 62 with a SB BG set up. It uses three 250 cfm carbs. The dude has if fitted with a Tri-power air cleaner to clear the hood. It looks good.

carbster09
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Old Jul 12, 2008 | 05:22 PM
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Originally Posted by carbster09
This month's Corvette Fever has a nice 62 with a SB BG set up. It uses three 250 cfm carbs. The dude has if fitted with a Tri-power air cleaner to clear the hood. It looks good.

carbster09
Thats what I thought! What page is it on, because I've looked through like 10 times and can't find it anymore.
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Old Jul 13, 2008 | 12:46 AM
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Still looking for someone with a tri-power small block. I know you guys are out there.
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Old Jul 13, 2008 | 12:46 PM
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Since you aren't getting any responses I do know that Pace performance sells ( I think a ZZ4) with a tri power. They can probably help you with info on requirements and outputs. Some place to start anyways.
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Old Jul 13, 2008 | 04:59 PM
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Originally Posted by milo30
Since you aren't getting any responses I do know that Pace performance sells ( I think a ZZ4) with a tri power. They can probably help you with info on requirements and outputs. Some place to start anyways.
Thanks, I'm sure there are others on here though. I'll drag it out a few more days. I'd rather not bother a vendor for information when I'm not going to buy anything from them.
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Old Jul 13, 2008 | 05:42 PM
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I had a Holley tri-power setup on my Dodge Super Bee. The only carb you adjusted was the center one. The two outer ones were just "cores" without any air-gas adjustments. I used the factory vacuum setup to operate them. With a 4.10 gear in 2nd gear at around 2500RPM I could floor it and you could actually FEEL the front and rear carbs snap open (it weas nearly instantaneous). . Like having an extra "passing gear". My friend had a 1961 Pontiac with factory tri-power using Rochester 2 bbls and mechanical lionkage. He had a 4.88 gear and the engine (a 389) seemed starved for air. I think the 3-Rochester cars is what was mainly used on the old tri-power aftermarket manifold. Or you might want to dig up the six deuces manifold, but they used Stromberg carbs and those are VERY scarce.
BTW....total CFM for my Dodge setup was 950.

Dep
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Old Jul 13, 2008 | 05:46 PM
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Thanks Dep, what heads and how radical of a cam were you using? You don't have any dyno numbers do you, or just estimates?
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Old Jul 13, 2008 | 05:52 PM
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Originally Posted by foxymophandlpapa
Thanks Dep, what heads and how radical of a cam were you using? You don't have any dyno numbers do you, or just estimates?
Heads and cam were the factory 440 magnum heads and cam (it was a 383 magnum). They had decent-sized valves, so it breathed pretty well. If you go with a Rochester tri-power setup, you will probably be okay with even the smaller valve Chevy heads. Tri-power was VERY popular on smallblock Chevy engines back in the mid-to late 50s and early 60s. Note that no matter how well you set up a tri-power manifold and carbs, you will never match the performance of a single 4-barrel. They look VERY cool, but they just aren't as efficient as a single quad.
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Old Jul 14, 2008 | 07:41 AM
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If you wanted to go a little further exotic route....there's a old Edelbrock X1 6x2 setup on racingjunk.com.The carbs need rebuilt.You don't have to run the Strombergs/97s,but they are easier to get to the jets.On my 94s you have to pull the carbs to change the jets which is a PITA w/all the linkage.The one advantage that I have is my Holley 94s are custom 2110s,and are made w/out the power valves.
I also, have a Mickey side by side intake for sale.......
Try a guy on the westcoast.....his website in vintakes.com.Very nice guy,and really into the multiple carb setups.
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Old Jul 18, 2008 | 05:37 PM
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ttt, I know I am not the only one going this route!
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Old Jul 18, 2008 | 09:29 PM
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I've been reading posts on this forum about tri power setups for a while now, these are hotrods and not Corvettes but lots of good technical stuff.

If you want some good reading do a search on Barry Grant or Six Shooter, you'll get an evenings worth of reading!

http://www.hotrodders.com/forum/engine/


Another spot:
http://www.vintagespeed.com/

Last edited by TopGunn; Jul 18, 2008 at 09:37 PM.
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