Need head recommendations for max torque LS2 engine.

Want to build a 360-370RWHP LS2 with approx. 11-1 comp., Katech torquer cam and would like to know what the experts think about whether the 243 style or L92 style heads would give the most torque with this setup.

The intake manifold would be an LS6 or L76 depending on which heads are used.

The reason for question is that the class the car is setup for has a HP to WT. limit but no torque limit.

Thanks,

J.R.

 

Well I would do some research to see if that cam even works well with L92 heads. They are "picky" as to what type of cams work well with them.

 

What's the hp limit for your proposed weight btw?

 

that 360-370rw is bolt ons power for a stock ls2

 

If I was the kind to cheat at class rules, I think I'd build
a *****-out motor and then punk the spark out for the
dyno with a hidden "tricker" and bring down the HP/torque
that way. Magic button, like. Pull out 10 degrees unless
you have the fog lights on, via the IAT adder table. Or
something.

 

Or build a LS3 with DOD, then make it controllable so that you are running on 4 cylinders when you want to.

 

Originally Posted by ss.slp.ls1
Well I would do some research to see if that cam even works well with L92 heads. They are "picky" as to what type of cams work well with them.
What's the hp limit for your proposed weight btw?


The cam was designed for L92 heads.

There is no HP limit but car probably needs to be in 3200-3300 lb range i.e. the reason to build 360-370RWHP. I realize I may possibly need to run a restrictor to get down to that HP but I would rather develop max torque and get HP with a tune. It also needs a fairly wide power band as it will be in a road race car.

 

Ok I just looked up the cam now, 220/244 @ .050, .615/.648 lift 110LSA.

With L92 heads, LS2 bottom end, and a freeflowing exhaust, toss the idea of 360-370rwhp out of the window...I don't see how you'd make anything less than 450rwhp. Using a restrictor plate would require special tuning and would probably throw all of how the cam was designed to work down the drain. I say if you want to be 370rwhp, just get a nice set of long tubes, full exhaust, CAI and call it a day.

 

Ok I just looked up the cam now, 220/244 @ .050, .615/.648 lift 110LSA.

With L92 heads, LS2 bottom end, and a freeflowing exhaust, toss the idea of 360-370rwhp out of the window...I don't see how you'd make anything less than 450rwhp. Using a restrictor plate would require special tuning and would probably throw all of how the cam was designed to work down the drain. I say if you want to be 370rwhp, just get a nice set of long tubes, full exhaust, CAI and call it a day.
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The cam is actually a .550/.550 204/219 on a 112LSA. The cam goes flat at about 6000/6100 RPM. This was designed for an LS3 ( I think this was a GM/Katech project, not positive) but even at that it makes too much HP which is why I thought going to an LS2 and possibly cathedral heads and similar cam might be more effective. I may be trying to accomplish something that is not possible but thought I would throw it out for others more knowledgeable.

 

i say buy some #241's LS1 intake and whatever cam you want and it will make little power with the bottleneck heads and intake

 

Yup, mine made 365/367 with all the boltons minus an electric water pump through a 9 inch and an auto. When I put on my FAST intake I'll gain evn more. Don't need cam and heads to make that power. In case your wondering @3000 rpm I'm making 325 tq

 

My cam is the exact opposite of what L92's are supposed to have and it made more power than the majority of streetable 6 speed cars.. especially with a bone stock L76 intake manifold.

 

LOL mine too.

 

Variable Valve Timing