I`m planning to have an 4 Barrel carb on the clifford intake.
Does it mater how i mount it? I mean if I bolt it on the "natural" way (secondary to front - primary towards firewall)
does that mean that cylinders 5 and 6 will run lean because of the offset?
An different way would be to mount it with the secondary side to the passenger side and the primary side to the driver side.
I think I would have better distribution that way - does it mater anyways?
How much difference do spacers make in this kind a setup?
I know the plastic or wood spacers keep the carb cool but will they hav any other effects?
Jags, Summit and all the others claim Torque and milage gain.
Anny ideas, pros and cons?
Thanks, Frank
You can run the carb either way.
I would be better to mount it the way you stated.
Just need to buy a long throttle cable or other linkage ideas.
If you want a carb spacer I would run a four hole type.
What kind of engine is this going on? I'll guess it is a Chevy 250?? . Type of build?
The Clifford manifold is quite large( volume inside) & depending on your build & size engine you really should not need to add any more volume to the intake manifold.
The Offy will give you better street manners, throttle resonse etc.
Milage will drop with a Clifford manifold.
I have run the carb both ways.It made very little difference street wise.I had my primarys forwards not backwards /Firewall. I am guessing that you have the newer style clifford which Does not have Runners Up under the carb.
Also like hank said USE the Four hole If you really need to use a spacer It will keep the carb thinking it is on a Lower mount/being close to the intake ,Keeping the vacum signal stronger.
The engine is a 261 - 060 over - Bulldog cam - split exhaust - nothing spectacular.
Iīm tired of the dual Holly/Webbers and Offy combo and want to try something different.
The carb is a 525cfm Road Demon. The Intake is the open Plenum Clifford.
My concern is not having the primaries forward or backward, but the - let`s say 1 inch offset of the venturys.
Thatīs why I thougt of mounting tha carb sideways with the primaries on the driver side.
Probably it doesn`t make any difference on this setup anyhow.
Frank
all the clifford intake are a open plenum. But the top plates are different. weather it be a 4 hole spread bore or a Open square. Mount teh primarys in board/(valve cover side) Less risk of the secondarys Over loading cyl. 3-4
I got the square bore plate.
Good issue on the overloading.
Got a tip of an old racing mechanic today, he would go that far to mount it -Primary front or back- but jet the in board venturys a hair leaner.
Wouldnīt that be a bit over the top for an old (but warmed up) 6banger?
Hum may be not Stranger things have been done. But what most people use for a carb does not have a Rear Meter block But Rather a Plate.
We tried cross jetting on circle track cars since it was believed the outside cylinders on a V8 would be richer because of centrifugal force. In fact at one time or another every oval track racer has tried it. The simple truth is all that back woods engineering is wasted time because the manifold plenum equalizes everything out. It isn't exactly perfect in distribution but certainly not worth the trouble of staggered jetting.
The only way to insure a perfect fuel feed is for every intake port to have its own separate venturi and jet.
My 292 currently has a holley 600 vac. 4bbl mounted sideways with the primaries closest to the valvle cover onto of a 4 hole 50mm thick spacer. It was the only way I could get the linkage working and not have the vac. sec. pot hit the valve cover. I have not tried any other arrangement so I'can't comment on them. The current set up is Ok not perfect but I haven't spent a lot of time trying to make it so either as the carb will only be on for few more weeks.