[2much4u]

I've heard that the more boost you put on your car the more strain it puts on the engine, is this correct?

If so , is there any way to take the strain off of the engine?

What does "boost" exactly do? Does MORE BOOST = MORE HP?

By the way, I know my questions are stupid, and most likely are really easy to answer, but im only 17 years old and i want to learn as much about my ride as possible.

[Drgnracin72]

the more boost, does equal more strain on the motor but if you have mmotor built to hadnel it, its no problem. when your boosting, it means your cramming more and more air into the motor. boost usually means more power but you canalso make more power and loose boost also. if you can make it low better, you can lose boost but get more power. these ?s arent stupid and im sure my answers arent the greatest and you can get a more scientific answer form someone else but that about covers it.

[2much4u]

ok ok, what exactly do you mean by "if your engine is built for it"? Built for it in what ways?

[Drgnracin72]

well if you have a stock 2v motor, they use a standard piston and rod and they are very weak. once you get in the 400 rwho range your running oin bought time. they are weak stock. when i say the engine is built for it, i mean forged rods and pistons and crank. only then should you crank up the boost. on your stock motor, i would not go pver 10 psi!

[Sable]

That is close to correct. The parts on the stock motor are not week, they simply are not built/designed for forced induction....FI.... they are intended for naturally aspirated functionality. When you add boost you add pressure and stress which will inevitably find the week spot in your motor and cause it to go boom. Usually the rods followed by the pistons. By building a "built engine" you are replacing the stock internals with forged or reinforced parts designed to handle those conditions...to make a long sotry short.

The only dumb questions are the ones not asked.

[stangchick]

I have a '99 GT - engine is mostly stock. I am wanting to do some serious increases in HP - including a twin screw intercooled supercharger. I am seeing my HP at about the 550 range or so. As so many people have mentioned above, you will have to start reinforcing the engine above 400. So what all would need to be enforced before crossing over into the 500 ranges? Has anyone done this? I would like to start doing all of the reinfocements this fall and the major improvements early next year. someone mentioned having to change the transmission as well, is this true?

[DragonFreak]

you can buy kits that come with all forged internals....but they very on what you wanna do...if you are just replaceing the stock parts or if you are stroking it...1 very important thing with boost is compression... if having a shop do the work then they will know what the best compression is for you set up

[stangchick]

What are some of the better kits for this?

[DragonFreak]

depends on what you are looking for are you going for a stock or stroker motor? dss make kits for both or you can buy the pieces by them selves and have them all put in... personally id buy a kit that has already been ballanced that way its ready to install.

[Drgnracin72]

personally from my experiences going on with dss right now, i wouldnt go to them again. there are several other engine builders out there that make great stuff. livernoise has a great shop and make some very good stuff. so does chp. stangchiock, if your wanting to get into the 500+ range your gonna need some stronger forged rods and pistons and a low compression motor. with that much boost about 8.5:1 is ideal. you will need forged rods and pistons and if you can, pick up a forged cobra crank. and yes sable the rods and pistons in the stock motor are weak.

[gills99stang]

My setup would be a good example of what you need to do. Check out my garage. Rods, pistons, valves, cams, etc....

[yknot]

Adding a blower to an engine increases the strain on that engine in several areas.
1. The simple fact that the engine now has to turn or power the supercharger puts a stain on the engine.
2. A blower or supercharger adds HP by cramming more oxygen into the combustion chamber of an engine. The additional air does two things, packing the cylinders with more air increases the running compression ratio, and packing the cylinders with more air means more oxygen, which is essential to making more power.
3. The engine is able to make more power by adding additional fuel to go with the added air. The strain comes from the higher running compression ratio and the additional heat made form the larger intake air charge. Engine internals of a stock engine (not a 03-04 Cobra) are not up to the added stress and heat. Ford uses cast aluminum pistons which are cheaper, and work well in stock trim, but fail under high heat loads of a blown engine. Another week area is the rods, these must transfer the high energy loads of the pistons to the crankshaft. Again Ford uses Powder-metal rods for stock low HP engines, they work well under normal conditions but will fail under the increased stress of a higher compression (blown) engine. All of these internal parts will cause catastrophic engine failure if any one of them fails. So it is better to replace these parts while the engine is still good then to wait and lose the entire engine.
4. Another internal part which should be replaced is the crankshaft. Ford equips most 4.6L engines with a Cast Iron crankshaft, which again is OK for stock power levels, but is know to fail under increased loads. The replacement of choice, would be a Forged unit.
5. before any additional power is added the engine itself should also be in good running order. This means the engine should have good compression and all the sub-system are working, including the fuel system, oiling system and electrical systems. Also, before adding any of the new parts described above, the engine should be checked by a local machine shop. There they will run the engine thru a series of checks and measurements to determine if it would be a good candidate for your blower kit.

[Drgnracin72]

wow.