What will my comp ratio be with these heads?

 

if you have a 5.3 the compression will be the same as stock.....these are stock cast heads.

 

Stock combustion Chamber is 61cc these heads are 59cc

 

I think they're advertised to boost the CR to 10.75? IIRC

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"Smaller Combustion Chambers For 10.75:1 Compression"

That's on TSP's site for their stage 2.5 5.3L heads, theirs must be milled down more though, because the math comes out to 55cc combustion chambers (220cc heads)

 

Those are compression numbers for the 5.7L LS1, not the 5.3L. 2cc's off the chambers will not jump you that much unfortunately.

 

I ordered new valve seals, gaskets, and head bolts. Also new plugs and plug wires, also bought oil, filter, and anti freeze. I hope to have these heads on next week or the following week.

 

yep. sure do. love em but i have a 6.0. helped the top end tremendously.

 

I really hope they wake up my truck

 

They will! Good luck.

 

I have them on the 6.0l that's going in my s10 and when this setup was in my buddies ecsb it made 417/404. Unfortunately the motor did blow when in my buddies truck but it was a high mileage 01 lq4.