LS3 vs. LSA 67 Camaro

[modena35]

guys, trying to decide on an LS conversion for my 67....are there major differences between the LS3 and LSA? I'm referring to the conversion, and costs involved to get up near the 700Hp mark

[andrewb70]

guys, trying to decide on an LS conversion for my 67....are there major differences between the LS3 and LSA? I'm referring to the conversion, and costs involved to get up near the 700Hp mark

A LS3 at that power level is not going to be streetable...the LSA will be...

Andrew

[SD67]

Going to have to bolt a power adder to the LS3 to get to 700 and make it street able. If those are you only choices, go with the LSA.

[Ron Sutton]

guys, trying to decide on an LS conversion for my 67....are there major differences between the LS3 and LSA? I'm referring to the conversion, and costs involved to get up near the 700Hp mark

I agree with the other comments on here.

At my company we are launching a wide range of LS based engines for Autocross, Track Day cars & Pro-Touring use ranging from 550-900 HP. None of our engines are supercharged for 2 reasons. As autocross and/or track cars, we don't want the 100# + of extra weight on the front. Second is the heat built from the supercharger stays ... known as "heat soak." On hot track days the engine wants to overheat & as the ECU compensates for the heat, you have a whole lot less power than the engine had on the dyno when it was cool.

But for primarily street driven cars ... the supercharged packages are FUN. Big power. Big torque. Easy to drive.

If Autocross & track days were your priority, our AutoX-Warrior 3 Engines are 416" based on LS3 blocks & CNC ported heads. With a cam that is streetable, we make 600-640 HP.

In the next series above that ... we do have a 700 HP LS3 in our AutoX-Warrior 4 series engines. They are available in three versions of 650HP, 675HP & 700 HP. These require different heads, intake & cam. And while you can drive the AX4's on the street, I wouldn't recommend them as a primary street driven engine ... as they are not as civil down in the 1000-2000 rpm range. Especially the 700 HP version.

The LS7 is a different ball game. Our AutoX-Warrior 5 series engine are 427" LS7's that come in 650HP, 675HP & 700 HP versions. These cam, head & intake combos are more streetable. Of course it is more expensive, as all the block, heads, dry sump, etc are more expensive for the LS7's. You can get a good supercharged LS3 for the same price.

In my experience, if you want big power in a street car, I'd suggest the supercharged route. If you're building a car to do autocross & track days, I'd suggest the naturally aspirated route for the lighter nose weight, as well as less heat problems & power loss on hot track days.

[BlackPearl]

I love my LSA engine and the performance is easy to obtain. I've never really had any issues while doing Auto-x for about six years. Once, my fan blew out a relay and only then did I overheat.

I'm not challenging Ron Sutton's info, I'm just stating I've had good luck with my set-up and love the performance.