Tee Koo said:
Compared to the power and torque ratings to E15ET, MA09ERT
Snip....
So your comparing a 930cc Turbo engine, Against a 1.5 turbo engine?
Here I go again...
MA09ERT 930 x 1.7 bar (atm + boost) = 1581cc relative displacment.
E15ET 1.5 x 1.5 bar (atm + boost) = 2250 relative displacment.
Stock power on both:
MA09ERT 110bhp
E15ET 114bhp (4bhp more from a whole 669 extra CC!!)
Now stock torque. Torque is much closer related to engine capacity, so these will be different..
MA09ERT 133N/m (98 lb/ft)
E15ET 164N/m (120 lb/ft)
For those wondering how the E15ET has so much more torque but so little extra power, its due to the fact the E15ET is only efficient around 3000 rpm.
Ok So lets take the relative capcities and compare them for over all engine performance as if they were both 1.0 N/A engiens.
MA09ERT
BHP Per Liter 69.6 (Pretty good, not many 1.0 NA engines make nearly 70bhp)
Torque Per Liter 84.1 N/m (61lb/ft) Again pretty acceptably by NA standards.
E15ET
BHP Per Liter 50.57 (A MA10 NON turbo is in a higher state of tune than this engine WITH a turbo, how crazy is that)
Torque Per Liter 72.9 N/m (53 lb/ft) This is really not great.
Back to the point. If your going to compare engines - pick ones with the same capacity. Otherwise its pointless. I scaled both of these engines to equilivent 1.0 NA engines. And as you can see the E15ET in its standard from is poor in comparison.
My point in doing this is the MA09, which you said does not have great torque, is infact relativly VERY VERY good indeed - infact even with all the pipework produces the same equilivent torque as a 1.0 16V CG10 engine - thats pretty damn impressive considering its 7.7:1 compression ratio. You can scale any engine in this way to compare them. I do it all the time - It tells you ALOT of information once you remove the differences in engine size.
Currently, my MA09ERT produces around 210 N/m of torque and around 180bhp.
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Now ohc_turbo you seem to be commenting on my car as if you know something about it. Sorry if that seems rude. But your sweaping statments are wrong. The MA09 Block is PHYSICALLY stronger than the MA10. For a start, the bores on the MA09 are 2mm THICKER - thats allot of extra metal. They would distort alot less under high loads compared to a MA10.
You mention blocks cracking is what limits power. Godknows where you got that from, perhaps the days of old cast iron blocks, but typicaly a block will bend and warp before they crack (SR20DET for example). THAT is what limits the power - all else being ignored, as clearly when they warp you get failures such as head gaskets, ring and bore damage etc - and its very hard to solve.