Clifford Single vs. Dual

[Anonymous]

I'm seriosly considering the Clifford header set-up on my current 200 rebuild. This will be going into my restored '63 Falcon Sta.Wgn., which is entirely stock in presentation. My question is, is there a performance difference between going six-into-one over six-into-two? One single pipe exiting in the factory position would certainly keep things within the stock venue, as opposed to duals. However, performance is my goal here, and I'll break out of the box, if necessary! Any experience/comparisons out there would be appreciated.

Thanks,

Norm in SoCal

 

[Anonymous]

Well, on the dual side, you will (obviously) have increased air flow (by having 2 2 1/2 outlets) thus resulting in increased performance and sound... How much... I couldn't tell you for sure. I have the CLiffy 6 itno 2 on my 200 CID 65 mustang and I LOVE them.

 

[TheDude]

I am going to be installing a dual out performance header on my 200ci that leads to a dual exhaust setup using Borla ProXs mufflers. You have to weld/epoxy a port divider (availabe on the Cliiford website) between exhaust ports 3 & 4 if you install a performance header. If you dont do this you will blow your head gasket. Exhaust ports 3 & 4 are connected. When you install a divider you are seperating ports 3 & 4 which gives you a little extra horsepower.

 

[addo]

As for the necessity of the port divider: Ford made the 250-2V with siamesed centre exhaust ports, and factory headers. They weren't famous for blowing gaskets. What they did have was locking bolts (washers, actually) on the header.

Adam.

 

[Anonymous]

I just read in the new Auto Krafters catalogue that the single outlet is recommended if no modifications are made to the engine. They say dual outlets work best with Hi-Po cam, 2V carb, elec. ignition, etc. Do you guys agree? My rebuild will be a very mild one...stock cam, 4 angle valve job, porting, polishing, balancing, 250 carb. Am I a candidate for single?

 

[Anonymous]

Am I a candidate for single?

In a word...yes!

Furthermore, doing a 4-angle valve job on an otherwise stock motor is a waste on money, IMO. Three-angle? Yes - along with gasket matching and a bowl clean-up.

 

[Falcon62]

Norm - you will be happy with the results with either selection. The biggest factor in your decision making will be whether you want a single outlet exhaust or dual.

My personal choice was for dual exhaust so I went with the dual outlet Clifford header (this was way before AzCoupe started sourcing parts for us) and 2" pipe with Thrush turbo style mufflers.

If you choose dual exhaust, keep the pipe size to no more than 2", and 1 7/8" is even better. There have been a lot of posts on this subject, so search the forum and check out some of the feedback.

 

[powerband]

Hey Norm, I have a '63 Wagon which aside from a chrome valve cover is pretty much stock. I picked up a set of Hooker dual outs on e-bay recently and am debating the best way to put them together. One thing I have been puzzling is the way most FSP'ers seem to set up dual outs is with one half crossing over to the driver side for true dual out. If you look under your rear left qtr panel you will find very little room for a muffler or even tailpipe next to the gas tank. I don't know if the Falcon non-wagons pose this problem but my tentative solution is this:
I plan on using the headers as true duals and use two stock exhaust pipes running down the pass. side parallel into dual mufflers of some sort with a dual exit more or less at the stock position. I have only "theorized" about this so I hope you come up with someting too.
PS I also picked up an Offy 3/1 setup, Dagenham 4 Spd and 8" Maverick rear for the project.