What parts of an engine need to be upgraded for forces induction?

Question

Many stock engines need upgraded to withstand a turbo or supercharger. Which parts will typically need to be upgraded?

Answer 1

In addition to what ozone guy said, you also need forged pistons & rods. Pick pistons that will lower the compression ratio unless you plan on running 100 octane or higher race gas. Also, if the main caps have the material needed, have then drilled & tapped for four main bolts. Depending on how much boost you plan to run, you may need to go with cross-bolted mains, or a main girdle. Basically, you need to strip the engine down to the bare block and rebuild it from the ground up to be supercharged. You can slap a blower on a stock engine and, if you don't turn the boost up too high, it will work (for a while). However, to get the best results and the longest life, built an engine intended from the ground up for forced induction.

Answer 2

"What parts of an engine need to be upgraded for forces induction?"



"Many stock engines need upgraded to withstand a turbo or supercharger. Which parts will typically need to be upgraded?"



More compression, means higher temperature overall, as well as increased pressure:

- valves need better cooling;

- cylinders need more lubrication;

- engine oil need cooling (if you are going to run long distances)

- crankshaft, bearings, and supports need to be beefed up;

- head bolts and maybe heads;

- exhaust system needs better / smoother / larger porting (be a shame to lose horsepower moving gas out of the cylinder);

- change the valve profile, and probably timing;

- raise fuel octane.



[EDIT:



Oh, yea, I almost forgot. Make sure the cylinders have not been bored out, for longest engine life.



Will need heavy duty metal head gaskets too.

]

Answer 3

Hi if only it was that simple sunshine. it is not that simple as the whole engine design is around the extra pressure it produces on bearings such as big end bearings and main crankshaft bearings. that is why it is not advisable to add either to an old worn out old engine. it reduces the life of even a new ordinary engine by at least half. so the 100k miles most get to before losing 50 % of engine power would be lost before it had covered 50 k miles.

Answer 4

Find all the weak parts in the engine. Other enthusiasts will openly tell you about any weaknesses in a specific engine.