How much Estimated HorsepowER/1/4mile times?

SHAUN'S03GT said:

I have 03 GT, Just recently added these mods all at once new ,shortblock bored .20 over. stage II ported PI heads Comp Cams XE stage 2 cams. Mac long tube headers, dr. gas o/r x, flowmaster 2 chamber cat-back, mac cai, trick flow plenum, accufab 70mm thottlebody, 4.10 gears, the reason i ask is my car felt stronger when i had old block (long story) with exsisting mods. any replies will help.

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SHAUN'S03GT said:

I did have it dyno tuned the first time...before the new short block,but when the motor blew after 400 miles they wolrked off of the same tune and just corrected fo a/f ratios.Now it doesn'tfeel as strong.

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