Hello guys

It's a friends C6Z Max effort project that we are working on right now, just wanted to take opinions and discuss topics on the build to see if we are on the right track or beyond

Build is..
Short block: forged LSX 427
Heads: PRC ls7 285 with TI valves
Compression: 9.6/1
Intake: 102 precision metal craft intake mid raised with 102 throttle body
Blower: F.2 (24 to 25 psi ) with DP cog system to avoid belt slippage issues
Fuel: C16 all day (no pump gas at all)
Cooling: M1 ALKY dual nozzle system

Now the question is

- Shall we bump up compression? Are we going to benefit if we did? Cause I feel we are at the low side with 9.6/1 right now and that the more we have compression the more acceleration we will get to turn the blower faster and fill up the cylinders

- shall we go with 2' inch headers and off road X pipes to the mufflers or add daul 3" inch cutouts? I've heard the more you free the outlets the more power you will make..

- what is the benifit of the 102 sheet metal intake over the stock? Cause I've seen people losing boost but making power with bigger intake and throttle body!

glad to learn and gain from your experience

 

Anyone ?

 

Losing boost and gaining power is a result from lost restriction, it's a good thing. On a turbocharged car boost is controlled by the wastegate so there will be no loss it will simply spin the turbo faster. On a blower the compressor spins at a fixed speed from the pulley and belt combo. With more compression you will make more power. Me for example my car is 13.8:1 compression E85 with a turbo (6psi) I made 837/741 on E85. Pretty efficient not spinning the compressor fast a lot of air in a lot out. Cam selection will also play a factor.


-Curtis

 

hmm, makes sense, just to confirm. I just increase my cubes and ported my heads. so in theory, without touching my wastegate and boost controller settings, i'll still see the same amount of boost before? even with the less flow restriction?

 

Your wg is based of a set psi spring, that will not change

 

You can do anything you want, but if you don't change your boost controller settings, you boost won't change.

If your boost controller is set for 20psi, it'll get to 20psi and then start bleeding exhaust pressure out through the wastegate to maintain your desired boost levels. If you increase cubes, port heads, etc it'll just change how how the boost comes on.

 

And make a ton more power at same level. Turbos rock.

 

Indeed

 

I think minimal gains would be had by bumping the compression up. There are a few articles on builds that talk about bumping it up past 9.7/1 and having little gains and sometimes losses.