427R Drive Ability

[eschaider]

Originally Posted by eschaider

,,, Adjusting the idle, going to a shorter R&P, changing carbs etc are all superficial changes that might but probably will not mask the drivability problem you are having. The issue is, as John (Grubby) had already noted, the camshaft and in particular the overlap and possibly also the duration ...

Grubby nailed it out of the gate in post #2. The cam is one of two problems you have. The second problem is deciding what to believe and what you intend to do.

You can spend a lot of time and potentially a lot of money chasing ghosts that always disappear as you reach out to grab them. In the end you wallet will be lighter, you'll be frustrated and likely worn out while the engine will still have all the same bad low speed driving manners.

The flip side of that coin is the highly probable loss of warranty when you do the swap. Real world, as olddog has already pointed out (and many have experienced), the Roush warranty sounds good until you have to use it. When you use it, you need to remove the engine from the car and ship it back to Roush before they tell you your problem is not covered by their warranty. Then you get to pay shipping one more time back to you. Nothing has changed at this point yet except you have less money than you had before you shipped the engine to Roush.

Cam installs are a walk in the park, even for those with limited mechanical skills. BTW Cobra's are not good car selections for owners with less than limited mechanical skills. Sooner or later it will get painfully expensive to pay others to do the work you should be capable of.

The character of an engine is attributable almost exclusively to the camshaft installed. Pick a better cam — get better low speed manners. It is that simple!


Ed