sc w/high compression is it possible?

[PunisherStang]

like the title says seen high comp sc in mag an was wonderin with a lil over 10:5:1 can it be done

[Chris00GT]

If you run a high octane race fuel, perferably with an intercooler of some kind, and limit the timing, then yes you can. If you don't have all of these then you'll usually have to limit the boost also.

[Rodeheaver's]

boost and high compression do the dame thing is essance, they create more cylinder pressure, which makes more power...

[chevydad]

get a custom ground cam to help bleed off some cylinder pressure.

[J-rod]

like the title says seen high comp sc in mag an was wonderin with a lil over 10:5:1 can it be done

talkin about the latest 96-98 GT with 600+ hp in the new 5.0?

was a good article.

[PunisherStang]

well besides spraying the car the best thing would b stage 3 or bigger cams i got crower stg 2 now

[Martin0660]

ANYTHING can be done. As has been said, its really a matter of how can you fuel it for the end effective compression. As Tim said, boost really just raises the effective compression when you simplify it. Its not the end answer, but thats a good simplification.

To give you an example, my little 2.3 is 8.0:1 compression at 25 psi boost, altitude has an effect here to as it changes out pressure ratio. My car look like this....

Boost and Altitude Correction to Compression
You are running 25 PSI of boost at an altitude of 1300 feet. Your motor's static compression is 8.0 :1. At this boost level and altitude your effective compression ratio is 21.35 :1, and without altitude correction your compression ratio would be 21.61 :1.

PRP is a true 130 feet elevation, but most times we race at something like 2600-3200 feet. Go down to Cecil, or out to Atco, its a little different game with the mine shaft air they get. Also the altitude will reduce your need for octane a little, but will hurt power.

You can play with a calculator here if you like:

http://www.rbracing-rsr.com/compression.htm

Plugging in your 10.5:1 at 1300 feet, it looks like 12 psi could be managed with good gas, great intercooling, and a safe tune........

Boost and Altitude Correction to Compression
You are running 12 PSI of boost at an altitude of 1300 feet. Your motor's static compression is 10.5 :1. At this boost level and altitude your effective compression ratio is 18.81 :1, and without altitude correction your compression ratio would be 19.07 :1.

Bob Myers