Hyper Pak vs Super Six

-
G

GraftonScamp

Procrastinator
Joined
Oct 17, 2006
Messages
5
Reaction score
0
Location
Grafton, NY
Everything I've read about the aftermarket Hyper Pak manifolds say they have poor driveability in cold weather and are for racing applications only. If I want good street performance from my /6, is it worth trying to find the original Hyper Pak setup or stick with the Super Six?
 
No heat riser on original Hyper-Pak manifold either I dont believe. Besides original manifolds are insanely expensive these days. If cold weather drivability is that important, find mid to late 70's manifolds with heat stove and similar air cleaner. Truth be known, all of the better running slants I've ever known were a bit cold blooded.
 
The original hyper pac intake is very difficult to find. There is a guy that brings one and the original cast headers to Carlisle every year but he wants 0ver $2K for them. Clifford makes a repop hyper pac intake but what I have heard is that you could wait up to a year to get you part after your card is charged.
You would be much happier with a Clifford 4bbl intake or an Offie 4bbl intake. They are made to use the stock exhaust manifold heat. If you haven't modified your slant in any way(porting, larger valves, compression) then a 4bbl is really over kill. you will never be using the secondaries.
For a stock engine a super six is your best bet. They are still plentiful in the yards near me. I can think of at least 3 off the top of my head. The BBD is a very user friendly carb to tune and you will notice a nice improvement in performance.
 
If you really want to use a Hyper-Pak, run a stock air cleaner and use a choke stove to run hot air up to the carb for better drivabilty.
(I'll have to snap a shot of my (Ugly) home made header choke stove to heat my T-Q)
 
The engine is stock right now, but I'm going to shave off 0.050 to bring compression up to 9:1, then do something with the exhaust (maybe some home-made Dutra Duals). Would that be enough to warrant a four-barrel, or would the Super 6 still be enough?

I also saw that offenhauser makes a dual-carb intake (two 1-barrels). Is this just a gimmick, or would there be a noticeable difference compared to one 2-barrel carb?
 
I had an Offy 4bbl intake with a 390cfm Holley 4bbl on it. This manifold had provisions to bolt to a stock exhaust manifold and provide the carb heat. I had headers that had a tube that ran from one of the header pipes to the bottom of the intake for cold weather carb heat.

FWIW, the Clifford 4bbl intake does not have provisions for the carb heat and it can't be used with a stock exhaust manifold.

I still have some pictures of my Barracuda with the \6 if you want to check it out on my web page.
 
If it were me, and cold weather drivability was on equal footing with performance, I would raise compression, mild cam, and keep super six with iron exhaust manifold, and warm air air cleaner. Probably best low cost option.

If horsepower was more important than sub-arctic good manners, I would use a bit more compression, performance cam, four barrel and headders. A performance oriented carb will tend to be jetted richer and a mechanical choke would make cold weather operation a bit better. Shouldn't be too much more expensive than a basically stock V-8.

Fuel injection?

If you havent already done so, take a look here also... www.slantsix.org

Just a thought...
 
Thanks for tips, guys. The car's being taken off the road for the winter, so I guess I have some time to think it over.

DGC333, great pictures of your old setup!
 
well u can run coolant threw the bottom of the heat riser on a hyperpack i would only sugest buying one/using it, if you where really building up a slant, but for just dd/mild driving(not drag car) just a warm cam, mill heads, maybe open up the valves, 4bbl and a header, with 2.25 all the way back :headbang: all this slant talk makes me wanna drive a slant car again, and mod it haha :sad1:
 
You must log in or register to reply here.
-

Back
Top