? about port divider

[Anonymous]

I'm going to have my head off and am considering installing an exhaust port divider (clifford) while I'm at it. My question is whether I will experience any benefit from doing this if I use the stock exhaust manifold? Any advise will be appreciated.

Also, I finished the 5200 conversion. I will post pictures of the linkage and adaptor plate.

 

[rmousir]

I am sure you will gain some benefit but if you get the headder from Clifford with it I believe there is a gain of some where around 30 horses. Surely you would notice that. Check out clifford and see what they say. 8)

 

[Guest]

I am sure you will gain some benefit but if you get the headder from Clifford with it I believe there is a gain of some where around 30 horses. Surely you would notice that. Check out clifford and see what they say. 8)

30 HP!! That's funny! Clifford's method of calculating HP is based on the same method the ricer-boys use. Here's the program:

http://pages.prodigy.net/al.martin/ricecopcalc.exe

If you notice, Clifford NEVER posts ANY HP numbers. We'll been calling them on that for years. Why would they want you to actually know that you can send them $3000 of your money to buy their overpriced parts and end up with a 160Hp motor. $3000 buys you a crate 302 w/ 300 Hp. We know that, but they think it's a big secret.

Al

 

[Anonymous]

The engine feels alittle smoother. I can see a more even distribution of head now in the exhaust manifold. I'm installing another one on the engine I'm rebuilding...ZZ

 

[CZLN6]

Howdy BurnerLief:

I believe that the port divider alone will help to improve and balance flow from cylinder to cylinder. It, by itself, may not be noticeable to the seat-of-the-pants dyno, but if you believe that every little bit helps, then it is worth it. I used one on a much modified head with a modified cast exhaust manifold and 2" exhaust on my 250 for awhile before I bite the bullit and invested in a header.

The point of the divider is to seperate each exhaust pulse for as long as possible and to even flow. How much? Maybe 2 to 5 hp depending on rpm range. The divider, along with a performance exhaust system, maybe 5 -10 hp, again, depending on the rpm range. Add a performance cam and improve intake and it becomes increasingly important.

If you are planning to add a three angle performance valve job and increase CR along with the divider while the hed is off, you will notice the difference. And you will be ready for headers when and if....

Adios, David

 

[Anonymous]

David, thanks for the info. Incidentally, I was planning to have the head shaved .030 - .040 and do a 3-angle valve job

The head is a '66 with the small log. It was re-built a while back and has hardened valve seats and the composite gasket. I don't think the head was shaved down when it was gone through. (my dad had the car at that time) My goal is just to make the car run a bit stronger so its comfortable to drive. My question is whether its worth it to do these mods on this head? I don't really want to screw around re-building a late model head if I can get an acceptable level of performance out of this one.

Other mods I've done so far are pentronix ignition and 5200 Holly. I will also be increasing the intake to carb opening to a 1.75" hole.

Please give your opinion.

 

[Anonymous]

The port divider would be a good decision either way you go. You will have it in there for later on if you decdide on purchasing a header. It will help with a manifold some as well.


Darin