Leyland P76 Owners 2004

Technical problem

Holley carb question

[215V8yahoo.group]


From: v8mazda7
Sent: Sunday, May 02, 2004
Can anyone tell me what if there is any reason that a Holley 4150 can't be installed rotated 180 degrees?
Any advantages?
The previous owner has set my car up this way, so the linkages and fuel line plumbing is reversed from a "normal" installation.
The application is a V-8 powered Mod class autocross car with a single plane manifold.
Daryl

Reply

Date: Monday, May 03, 2004
Daryl,
This is a good question.
I put my 215 in a mid-engined car so to make the linkage correct I also had to reverse the carb 180 degrees.
Seems to run fine.
However, I remember about thirty years ago reading an article about carb placement.
The authors took a 2-barrel carb, centered it on a manifold and ran the quarter mile.
They then took the same carb, offset it forward (similar to a 4-barrel placement) and raced it again.
Turns out when it was shifted forward it got better performance.
The theory was that acceleration forced the gas mixture toward the back of the engine thereby starving the front cylinders.
So shifting the carb slightly forward overcame this.
With that in mind, a 4-barrel carb reversed 180 degrees should not perform as well as one mounted correctly.
Dave S.

Last updated
Dec, 2005
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