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440sixpack

Senior member
May 30, 2000
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The stock rating for this engine was 390 hp, 490 ft.-lbs. However, although it is not currently running, the engine is now overbored to 446 c.i., has a bigger cam and I believe roller rocker arms, so it's probably slightly above stock.

The six pack (3 2-barrel carbs) was created basically as a fill in between your standard single 4-barrel carb that was found on most muscle motors of that time period, and a pair of 4-barrels that were usually only found on high end engines like the 426 Hemi. Here is a pic of the engine minus the carbs, showing the intake manifold. And here is a rather crappy pic of the six pack itself.
 

Assimilator1

Elite Member
Nov 4, 1999
24,160
522
126
Jesus thats alot of Torque!!!:Q:Q *me faints*

I've had a moderate interest in performance tuning myself in the past ,though we mostly have straight 4s here in the UK their are some V6s & the Rover Alu V8 was a popular engine.10+yrs ago the best fuelling you could get for the V8 (road use) were 4 twin Weber 44 DCOEs (think thats right) that would give an awesome amount of power along with other mods of course:).(Custom injection kits are the way now).
Quad twins wasn't too common though due to fuel costs here :(.Anyway that setup gave a barrell per cylinder ,the ideal setup ,how does the inlet manifold (header?) spread 6 barrells for an 8 cyl engine?:confused:

*sigh* I'd love a Rover V8 with Quad Twins in my Sierra ;)
 

RaySun2Be

Lifer
Oct 10, 1999
16,565
6
71
Assimilator1,
If you have problems with 6 barrels for 8 cyls, try the 2 barrel (I have a '67 Chevy Belair, 283ci 2 barrel in my garage) and 4 barrel carbs common (my '66 Chevelle had a Holley 4 barrel carb on that 396ci).

:D
 

Assimilator1

Elite Member
Nov 4, 1999
24,160
522
126
I guess its no worse than my old Mk1 1.1 Fiesta I had ,that was a 4cyl with a single barrell carb;) (not horrible VV)
2 barrell for a V8!??:p
 

440sixpack

Senior member
May 30, 2000
790
0
76
Originally posted by: Assimilator1how does the inlet manifold (header?) spread 6 barrells for an 8 cyl engine?:confused:

Well, I'm sure it's quite twisty in there. :D Actually it only runs on the center carb until you punch it, then the outboard carbs come on line. So I'm pretty sure all 3 carbs dump into one central chamber, then the runners divert the fuel flow to where it's needed. :)
 

HayHauler

Golden Member
Feb 21, 2003
1,217
0
0
Originally posted by: 440sixpack
Originally posted by: Assimilator1how does the inlet manifold (header?) spread 6 barrells for an 8 cyl engine?:confused:

Well, I'm sure it's quite twisty in there. :D Actually it only runs on the center carb until you punch it, then the outboard carbs come on line. So I'm pretty sure all 3 carbs dump into one central chamber, then the runners divert the fuel flow to where it's needed. :)


Yea, where the Pressure is lower...


:cool:
 

RaySun2Be

Lifer
Oct 10, 1999
16,565
6
71
Yep, a 2 barrel for a V8. :)

I would get 21 to 22 mpg, cruising 70 on the turnpike with the air conditioning on. :) Not too bad for a 4500 lb full size car from the '60s. :)
 

Assimilator1

Elite Member
Nov 4, 1999
24,160
522
126
Jesus! ,gas guzzlers;)

My '79 Fiesta (900kg odd)would average about 37mpg I think ,I that was with my hard driving;)
hmm ,I think we've been hi-jacking this thread;)