LSX or LS6
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On The Tree
Joined: Aug 2006
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LSX or LS6 I have a 98 Z28 M6 with full bolt-ons. I'm going to go with PRC heads 220cc 5.3L Stage 2.5 CNC ported heads and Torquer V3 cam 231/234 .643"/.598" 112 LSA, and all the supporting parts. Now my questions is should i go with the LSX fast intake and fast throttle body or should i just stick with the LS6 intake? also future plans not for sure yet but i might go with a LSX direct port shot of nitrous, and the LSX has the ports for the injectors already. So with that being said hopefully so of you guys can chime in and help me out with this.
Well with a Heads and cam setup, a FAST 90 system will net you about 10-15 more HP, chances are it'll be at the top of the power band. It really comes down to cash, is that 10-15hp really worth the $1,000 for a FAST manifold?? Some people don't mind having the best go fast goodies and are willing to spend top dollar for them. I know it's on my To Do List, till then the LS6 will have to make do. 
What are you wanting? The better part of the forum to tell you to run the 90/90? It is gonna happen. Half the people that say to get it don't even have it! I will be the first to admit that I have a 78/78 FAST setup. The 90/90 is probably not too much better than this, but I am sure it is an improvement.
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I just installed the Fast 90/90 on my car. I have h/c with full bolt ons and I could tell a slight increase in power but if you dont race regularly it might not be worth the money.
