David-Starlet
Member +
will fitting 265 duration cams with 8.7 mm lift lower compression much? anybody know roughly how much?
cams lower compression
- Thread starter David-Starlet
- Start date
David-Starlet
Member +
ah i get you. but can i build my engine with slightly higher compression as when the engine is running the compression will be slightly lower if you get me?
As the engine speed increases the valve overlap period decreases, it's there to prevent scavenging leaving exhaust gas in the cylinder to mix with the fresh charge, therefore reducing power.
I wouldn't build it with higher compression because it's not really possible to measure the decrease the cams will give. It will depend on the management system, fuel used and of course who's maps it to how high you can go safely.
I wouldn't build it with higher compression because it's not really possible to measure the decrease the cams will give. It will depend on the management system, fuel used and of course who's maps it to how high you can go safely.
weeJohn
Lifer
http://www.gtsparkplugs.com/CompRatioCalc.html
As you can see from that, compression ratio is not affected by what cams are present in the engine, dont mix up a cylinder compression reading with the engine compression ratio.
As you can see from that, compression ratio is not affected by what cams are present in the engine, dont mix up a cylinder compression reading with the engine compression ratio.
surly bigger cams lower chances of engine detting compared to running standerd cams
weeJohn
Lifer
that would depend on timing mate.
more to do with the person the tunes the car id say to keep the det away ,alot of engines detting from what ive been reading the last few days