Hi all!
I am currently rebuilding my 2.7l. (Worn out exhaust tappet)
I am thinking about to put in an 2.5l crank, will give a little higher cr (now I use the 2l crank), or to do with an standard 3l engine. 9.5:1 cr. But how much boost can I use on that engine? Will probably go with e85 fuel, have it on an gas station near..
I need to run about 10-12psi to get the turbo into its most effective area.. Will this be possible? The turbo is an Turbonetics t3/t4 e-60 with .82AR stage 5 exhaust..
Have been using Turbonetics t3/t4 e-46 with .63AR unknown stage on my 2.7l, but it will not hold more than 1.2bar at top, so I need an bigger compressor, thats where the e-60 came in top the picture....
I can lower the cr by using an thicker head gasket but that will move the camshafts a little, wouldn't it? Because of the extra height from the crank to the cam wheels? I do not know if this will be right or if it will go in the wrong direction...?
Any ideas, suggestions?
I did see the link here for the compression chart. And when looking at the 8:1 compression and 22psi boost (about 1.5bar - which I am running fine in my 155 Q4) it does not give any higher cr than 9.5:1 with 12-13psi. I know the 16valve heads probably flow higher, but anyway?
The chart:
http://www.autocomponenti.com/boosted_t ... d_tech.htm