Absolute Speed Stage 2.5 Heads
Absolute Speed Stage 2.5 Heads Can somebody that has ran these, or knows how they flow please give me a little more info. I can't seem to find anything online about them.
Of the top of my head, depending on how Jay did the work, they could flow around 300-308 CFM at .600. I am sure someone will post a flow chart. Are they the 5.3's or 5.7's?
I currently have a set of Absolute Speed 5.7 Stage 2's, but will be upgrading to the ETP 215's very soon.
I currently have a set of Absolute Speed 5.7 Stage 2's, but will be upgrading to the ETP 215's very soon.
i had a set of the absolute stage 2.5's. my flowed 314cfm@.600. absolute speed is out of business. my 1st setup, i had the old absolute stage 2's that flowed 290's, comp XER cam 230/230 and a stock ls6 intake and made 429/402......
then i switched to the absolute stage 2.5s, 90mm LSX setup and a big g5x3 235/243 112 cam and made 455rwhp through 3"duals. i figured with all those upgrades i would have gain more than 26rwhp. going from the stock ls6 intake to the 90mm LSX & 90mm TB i would have gained 15rwhp, the cam i figured around 10+rwhp so there 25rwhp right there. i dont know, tune was dead on. i could only get 27 degrees timing with this setup. the old heads and smaller cam i was running 29degrees timing.
those ETP's are looking awesome. thats what id be using.
then i switched to the absolute stage 2.5s, 90mm LSX setup and a big g5x3 235/243 112 cam and made 455rwhp through 3"duals. i figured with all those upgrades i would have gain more than 26rwhp. going from the stock ls6 intake to the 90mm LSX & 90mm TB i would have gained 15rwhp, the cam i figured around 10+rwhp so there 25rwhp right there. i dont know, tune was dead on. i could only get 27 degrees timing with this setup. the old heads and smaller cam i was running 29degrees timing.
those ETP's are looking awesome. thats what id be using.
Last edited by 30th t/a; Dec 5, 2005 at 06:46 AM.
I had the LS6 2.5's. I made good power with these but they were falsely advertised. I had 2.055 intake valves instead of the 2.04's. The heads were not fully hand finished either. I sold these heads for cheap and I am waiting to see what they do on a motor that is about to be tuned at the shop.
