Another, Damn it, horsepower guess ??

Post #48: 'Anything you can to to a TQ you can do a Holley'.

Well, no actually.....

These are things you can to a TQ that you cannot do a Holley:
- change the air valve [ AV ] spring rate/adjustment
- change the AV kick
- change the AV fully open position
- remove the baffle in the secondaries. When the baffle was removed on a Hemi with a box manifold, HP increased by 30.
- change secondary blade angle @ WOT. Because of the huge 2.25" sec blades, they have a profound affect on air flow & distribution.
- the TQ is the only 4bbl that I am aware of [ don't think the QJ has this feature ] that has a mechanical link to primary jet enrichment. The step up rod on the Tee hanger. And it is also adjustable. Increasing throttle opening to a larger throttle opening has a fractional time advantage in getting additional fuel flowing for the increased load. This, coupled with the convoluted path that additional power valve fuel in a Holley has to travel, means less chance of a bog with a TQ.

Post #49. Holleys rich at idle. Yeah, they win economy contests all the time...........


If your Holley is rich you don't know how to tune one. It's that simple. IMO, if you want a hot rod and are worried about fuel economy you need to take up a different hobby or spend the $$ on a good fuel injection system.

My street/strip 69 Dart has a 434" small block, a decent sized solid roller, 263/271 @ .050", .711/.719" at the retainers, ported Indy heads and intake, 11.2-1 compression and runs on pump 93. The carb Has a BLP BX4 1.590" venturi main body, 1050-1100cfm according to BLP. This car gets driven on the street a lot and runs mid 6.20's @ 110 mph in the 1/8. It hasn't had the plugs changed in over three years. I don't know how many miles per gallon or gallons per mile because it doesn't matter, if it did I'd have a Prius.