i will be replacing the pistons on my LQ4 build to increase the compression. My question is should I just replace the conecting rods since it will be apart anyway? I also am not sure if i change them should I go with an I-beam or H-beam.

 

Since you're upping compression, I take it you're scrapping the boost idea? I wouldn't touch the rods in that case. Plenty of SBE LQs up to 700 whp on boost, so you'll have plenty of headroom.

I guess it depends how high you plan to spin it, may be worthwhile to do stronger rod bolts if you're going to rev the heck out of it.

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Would like to see some pictures of the work, if possible.