compression and superchargers

[white00s10]

if and when i get a supercharger, would it hurt to include higher compression pistons? just a thought

[Joe]

you want a lower compression ratio for forced induction

[ZR1-S10]

A low compression high boost combo will make more power then a high compression low boost combo.

[Matt 4.3 TBI]

It depends how much boost you want to run, and how high of a compression ratio we're talking about. For example, Syclones run about 14psi, and have 8.5-1 pistons.

[Supercharged-ZQ8]

A low compression high boost combo will make more power then a high compression low boost combo.
Yep. That about sums it up -- of course, it depends on the kind of boost. If you're talking roots blower, then most definitely. With a centrifugal blower, since it is rpm dictated, it ends up being the other way around at lower rpm (before the boost really starts to kick in).

[Matt 4.3 TBI]

Heh, sounds like TURBO LAG!

A high-boost, low-compression engine will have a lack of low-end power until the blower or turbo builds boost. In this case the blower is making most of the power for the engine.

A high-compression low-boost will have good overall power, and the blower will assist the engine in making more peak power. In this setup you could also probably avoid using an intercooler, making the system less complicated and overall more efficient.

[Supercharged-ZQ8]

A high-boost, low-compression engine will have a lack of low-end power until the blower or turbo builds boost. In this case the blower is making most of the power for the engine.

A high-compression low-boost will have good overall power, and the blower will assist the engine in making more peak power. In this setup you could also probably avoid using an intercooler, making the system less complicated and overall more efficient.
BINGO!! Also, a high-compression/low-boost setup is a bit more reliable and more consistent (times and such -- not as much of a concern with heat soak and so forth).

[blazen]

but would you really want to go any higher than stock if your puttin any kind of boost.

[ZR1-S10]

The 96+ engines have 9.2:1 compression and thats fine for up to about 10psi. Our fast burn cambers help prevent knock, however they are made from Iron and we have cast pistons. Given the setup of your engine and both the Powerdyne and Wynjammer ablitys', I say keep the stock compression ratio and provided boost lever from the super. After you rebuild the engine then make your choice, ether combo has it's pros and cons.

[Supercharged-ZQ8]

The 96+ engines have 9.2:1 compression and thats fine for up to about 10psi. Our fast burn cambers help prevent knock, however they are made from Iron and we have cast pistons. Given the setup of your engine and both the Powerdyne and Wynjammer ablitys', I say keep the stock compression ratio and provided boost lever from the super. After you rebuild the engine then make your choice, ether combo has it's pros and cons.
Exactly.

[white00s10]

thanks, s/c is gonna be a ways down the road, but thanks for the info, just wondering