just picked up a complete 03 6.0 motor today..Has the 317 heads and i guess better oiling compared to the earlier motors...Anyway question is what is the stock comp ratio on this motor?I have been told 9.5 to 1...Also i guess the heads are 76 cc chambers?I plan on a simple wash and wax with good rod bolts and a 595 595 232 238 113 lsa with some port work to the heads...Other wise a stock short block...What is the power limit to the stock short block?I planned on bottle.Like i said it will be a wash and wax with arp rod bolts and head bolts fully balanced with the ported heads and the cam above and going to try and pickup a half a point of pop by milling the heads..


O its going in a 65 el camino with a t350 4000 stall 3.73 gears thanks....

 

If it's an LQ9 then it should have 10:1 compression. If it's an LQ4 then it should be around 9.4:1. The 317 Cylinder head CC should be around 71CC. I would say you could do 600 rwhp on nitrous quite easily, depending on the weight of the Elky (which that year should be close to 3000 lbs if gutted).

 

Full interior daily driver street car....With a all iron standard small chevy it was 3500lbs with beat and a bench seat...Going to put buckets and i did a glass hood so im hoping for 3300 with me in it...I have been told its a lq4 and its 9.5 or so....it does have the 317 castings though..

 

I had a 68 that was pretty gutted and well rusted (it sat 10 years before I picked it up and started playing with it). It went about 3300 (according to the truck scale in Chula Vista), with 1 Recaro bucket and no carpet.

I think if you milled the heads a bit and went with a thinner cometic gasket (say the .040) you could get the compression up a bit. Maybe a nice nitrous grind and you might be able to squeek out 650 rwhp that'll last a while. A good tune will do the nitrous runs a great deal of good.

 

Who do you recomend to tune it?Im in central valley...