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57 Gi and 57GXI difference

J

jdmorris76

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I have a 5.7GI engine rated at

I have a 5.7GI engine rated at 270HP and they make a 5.7GXI rated at 320HP. I was looking throught the Volvo parts catalog for both these engines and I assumed the cams might be different but the only parts that were different between the two were the rocker arms and the ECU and a decal on the top side cover. Does this sound correct? I'm thinking if thats all I have to do to add this much HP....... Then thats easy!
I wish someone would just make performance chips for these engines.
 
"May very well be just that. B

"May very well be just that. But how much is the ECU? Are the injectors the same too?
The rockers could work anyways, I think."
 
"the injectors and cam and thr

"the injectors and cam and throttle body are all the same part number. Thats what I figured the differences would be. I'm sure the rockers are a different ratio which would give you more valve lift, which is basicly like changing the cam.
Anyone know the prices for these two items?"
 
The HP specified for those two

The HP specified for those two engines are at different RPMs and the compression ratio is spec'd differently as well... then there are the unknown differences in ECU calibration curves.
 
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