67 MUSTANG UPGRADED 289 ENGINE WITH EDELBROCK TOP END KIT.

5

Asked by Apr 25, 2014 at 08:35 PM

Question type: Maintenance & Repair

What is the fastest and/or cheapest way to unharness more hp in my 289 engine, with
a stock c4 auto trans and stock rear end (probably with oem highway cruising gears).  
The engine was upgraded recently by having an edelbrock top end kit installed which
included a new cam, aluminum heads and 4 bbl aluminum intake.  A 600 cfm holley
carb was installed as well as ceramic hooker headers and a full 2 1/2" flowmaster dual
exhaust system.  The whole package took the hp from 200 (stock) to about 367 after
the upgrade.  The problem is that the power to the wheels from a dead stop is just
about the same as it was before the upgrade (not great)  Does it need trans. work or
new rear gears or a stall convertor or ??  What is the fastest and cheapest way to fix
this problem?  Thanks.

1 Answer

31,215

Lower profile tires or lower gear in the differential. Both will accomplish the same thing.

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