View Full Version : LS2 - what kind of HP/TQ numbers should I expect?


karsty
04-27-2012, 02:50 PM
I'm currently looking at buying a used LS2 that came out of a GTO. I've been out of touch with the American V8's for awhile, so I'm a little unsure of the power and torque figures this engine should put out.

Here is the information I know:

-2006 GTO LS2 shortblock - stock bottom end
-Texas-Speed PRC CnC ported LS3 heads http://www.texas-speed.com/p-1179-prc-ls3-and-l92-cnc-ported-heads.aspx
-Lightweight s/s valves, dual springs
-Comp Pushrods, LS7 lifters, Comp Cams trunion rebuild kit on LS3 rockers
-LS3 intake, LS3 injectors
-Doesnt have a cam yet, but the recommended bumpstick is a Patrick G spec'd cam: 226/234 .598/.612" 114LSA +2 cam ground with EPS lobes on the intake and quiet LXL lobes on the exhaust

I plan on putting this into an FD RX7 with a T56 or T56 magnum.

The seller says with that cam it should make 460-480rwhp/410-430rwtq depending on fuel octane used and dyno. Does that sound reasonable? If not, what would need to be done to get it up around 480++rwhp? Also, does the recommended cam sound good for the power I'd like and the fact it's going in a 2700lb car?

Thanks!

karsty
04-29-2012, 11:54 PM
Anyone?

karsty
05-25-2012, 03:00 PM
Did I post in the wrong section?

Just looking for some guidance before making a relatively big purchase.

30th t/a
05-25-2012, 04:45 PM
id expect more in the 460-470 range. Some stock bottom end LS2's with TFS 225 heads, Fast 102mm intakes have made 500-520rwhp.

karsty
06-05-2012, 12:35 PM
id expect more in the 460-470 range. Some stock bottom end LS2's with TFS 225 heads, Fast 102mm intakes have made 500-520rwhp.


So a little better flowing head, like the TFS 225, and a bigger cam might do the trick to bump it up to the 500whp range then?

The engine I was looking at might not be for sale any longer, but I may just buy a stock LS2 and build it, so everyone's suggestions are still welcome on how to achieve 480-500whp.

Thanks!

Gunslinger09
06-05-2012, 04:32 PM
475-480 HP Sounds about right. The Ls3 heads need a larger bore to unshroud the valves.