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I'm just about to get new pistons for my future XS Turbo application coming in mid-summer. I like the sky-high compression of the GTS and am wondering if it's necessary to order pistons with a lower compression in order to turn up the boost higher than Keyshawn has it, or could I just order new pistons that are STRONGER. I really need some help on this one as I don't really have any idea.

Thanks,
aerospike2002
 

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I think probably the best single thing you can do to increase the boost with stock compression is 100+ octane fuel (or c16 face fuel). Get something around 104 octane and you can probably boost to 12 psi, but then you might bend a connecting rod I don't know. Also there are some rumors that the stock MAFS can't read anything above 8 psi or something like that, not sure on that do a search.
 

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if you are planning on running higher boost than stock on the xs kit, i would strongly recommend stronger (forged) connecting rods and pistons. You can get both from www.monkeywrenchracing.com . You can have the pistons made to any comp. ratio you desire, lowering the CR will allow you to up the boost a little more, however, you will need to find someone that is very competent in tuning the PowerFC unit that comes with the XS kit. If you are seriously considering this, I would start by getting the normal XS kit running correctly first, and go from there.
 
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