If you use a 1.5" tapered spacer on top of a cloverleaf spacer, you are not getting the whole picture. The manifold top MUST be cut out in order to see most gains.
You can use the 1" tapered on top of the cloverleaf.
Most people having an all out, Victor/dominator combo would LOVE an extra 10hp. Average power and acceleration down the track would improve also..
Again, Tom you are correct again!
Ten hp might just give you close to a tenth in a slower car.
On higher hp cars with a Victor manifold, you might see less, sometimes, even MORE.. On a Victor/Pontiac, the distance from the carb to the plenum is small, compared to other "race" manifolds.
Most race engines that can stand more plenum volume will have the added benefit of having more distance from the plenum floor, allowing the air to slow down and turn to the outside runners. The tapered spacer's angles help the air/fuel make that turn, therefore helping distribution.
If thought out properly, that turtle thing that some people swear by WILL NOT BE NEEDED if the spacer/manifold/carb booster/emulsion package is correct.
If people start to analyze their own engine programs, pick up 10hp here, 10 hp over there, etc. They will end up with a more efficient package that will run FASTER that most people with the same engine combination!! Just as class guys such as Langer, Rex, Gaydosh, etc.
We dropped .4 tenths and gained 5 mph with the SAME engine in our low 8 sec car, just small increments at a time..
JMO
Tom, my email address is
[email protected].