The V8 Owners Forum -

8 cylinders, 3 carbs...makes perfect sense.

Tri-carb (3x2 barrel) are usually associated with 6cyls ans dual quad (2x4 barrel) are normally associated with 8cyls. But If I remember correctly, Oldsmobile in early fitties offered tri-carb option on their performance BB V8 called Tri-power J2.

"This will kick you up into the magic 400 HP range"

Blimey!

The manifold looks like a flapper efi jobbie recast to suit but anyways, it would certainly look cool under the bonnet of a rod of some sort.

Style over substance.

Chris.

Some other Tri-Power kits :

http://www.hotrodcarbs.com/home.php

http://www.carburetion.com/tripower.htm

http://www.hptrends.com/index.htm

Some explication how it works :

http://www.automedia.com/Anatomy_of_a_T ... 011201tp/1

The tri power sustem works pretty well,with the centre carb working on light throttle and on the system i ws looking at recently the other two carbs come in on vacuum under load, so you get reasonable economy with a single carb, and good power with the other two carbs situated right above 4 cylinders each,
The set I looked at was off a Tri power 68 BBC Camaro, surplus to requirments with all the original Factory bits including air filter, Went for around 3k-----------------------------------------Might not make sense??????,------but made loads of MONEY

Looking at that manifold on ebay I cannot see how mixture distribution can be anything other than patchy. I know that a lot of carb setups splurge fuel around in a random way, but that one looked almost guaranteed to have a lean outer cylinders on cruise and lean inner cylinders under WOT.

The 'Merkins seem to believe they are a good thing, there are loads of "performance" tri power set ups for sale in the US rod magazines, one company even make a "Stromberg twin choke" replica as a fuel injection throttle body, then bolt that to a 3X2 (tri power) manifold and operate the whole lot with a progressive linkage that opens the middle one first. Seems to work ok for them, but that is a bunch of people who will spend $6k on an engine rebuild with fancy piston coatings, cams and heads, rockers fancy ignition amplifiers and fuss to the Nth degree on setting up the valve preload, and then bolt on a 4 barrel out the box on and never touch the carb at all
Or spend $12k on an engine build, and run it on a $750 manifold and single 4 barrel carb combination, again out the box, set to "their" spec at the factory and never touch it.
Mike

I can't see whats wrong with it, they took a 4 barrel manifold and made a big plenum to put a 2 barrel on, I run a 2 barrel with no problems as they were an upgrade for 5.0 mustangs. Then added Nitrous with only nitrous jets, and then used 2 other carbs to supply the fuel under WOT for the Nitrous system. I don't quite see how they don't stop the other buterflys opening and causing a variable lean mixture? Ah vacum controlled, it's not exactly a street friendly set up. It would do well to have a solenoid control the 2 outside carbs on WOT and just use the inner carb for daily running. that way you can eliminate the horrid linkage that looks like it would bind in an instant.
Nice idea, poor design.

Its like what Mopars had back in the seventies, the famous Six pack option package.