Masochist

iTrader: (1)

I've got an LS2(C6) with full bolt-ons and a TV2 cam in it right now making just over 430hp. I have my eyes on stock, unported L92 heads for under 600$ a head and I'm wondering if that head in it's stock form would be a good performer or what I should upgrade if not.

This is a daily driven car that rarely sees track use so I am okay with leaving some hp on the table(I know the TV2 is a bit small) in favor of maintaining or even increasing reliability. I would be willing to spend on common sense upgrades for the pair of heads just to ensure reliability.


Any input on whether or not this head in it's stock form is a good choice would be most welcome, thanks!

HCI2000SS

iTrader: (2)

Not worth it at all IMO

Masochist

iTrader: (1)

Welcome to any suggestions but I am not really keen on swapping the cam out.

HCI2000SS

iTrader: (2)

I think your best bet is getting your stock heads worked over. A good set of ported 243 heads is hard to beat for the money

KCS

iTrader: (20)

The cam really wouldn't be ideal on a set of L92 heads, so you probably wouldn't like it as a daily driver. A set of ported 243/799 heads or even an as cast aftermarket head would pair up with the TV2 cam a lot better IMO. Having the intake ported wouldn't be a bad idea either.

NAVYBLUE210

As suggested above porting your heads maybe finding a used FAST 92 and having It ported is the best plan for a daily driver keeping existing cam.
Pick up 30 minimum across the whole band and 50+ @ the peak.
Bonus the car will drive the same when not on it.

Tuskyz28

For 600 dollars you can almost send those heads to advanced inductions...

06blackGTO

iTrader: (20)

It will work good. I had a 06 gto. . Tx. Speed trqr 2 cam. L92 heads untouched and untouched ls3 intake,injectors. Put down 461rwhp. I'll post dyno sheet tomorrow morning when I'm off work. Car was strong.

redtan

iTrader: (5)

Stock solid valve heads for $1200?

You can get brand new GMPP cnc heads with hollow stem valves for that kind of money.

Although if I were going to drop $1200 on new heads I'd rather just send the stock 243s to AI and let them do work.

06blackGTO

iTrader: (20)

Here you go. It would work with that setup.


it would be fine.

Tuskyz28

Nice torque curve you have there

MuhThugga

I wouldn't recommend that cam with those heads, and at $600/head, that's a terrible deal for L92s.

If you don't want to change the camshaft, then I would put that $1200 towards a set of ported 243s.

JimmyGTO

I see in your description of your car you have your heads ported and milled, who did the head work?

06blackGTO

iTrader: (20)

Oh for my g8. I had them milled and exhaust ports only ported locally at a shop called nolands head service in kc. The dyno numbers were just taken about 2 weeks ago. She was heatsoaked with my heavy camaro 20s on. If she's cooled down on my drag setup I think she has 460rwhp in her. And thanks tuskyz28.. I sure miss the 6speed in that goat. Lol

Mercier

iTrader: (15)

Concur on the price. I recently sold a pair of very low mile eat-off-them clean LS3s with hollow valves and PSI 1511 springs for $600. Like $300/head.

I am surprised at how well the L92s did with the cam spec'd for cathedrals. Seems the common school of thought out here is square ports really need different camming. I traded the LS2 intake off the V last month straight up for a complete LS3 intake so $600 plus a trade and some misc. gaskets and fluids sounds like the cheap ticket to mid-4xx RWHP.

Ported 243s can do some amazing things as well though and might net you a little more bottom end.

Masochist

iTrader: (1)

That GTO's dyno sheet looks great but I think I'm going to go the route of getting them sent out to AI. It does appear that you are going to want a specialized cam for the L92 heads, in line with what people have been saying. That said, working on my 243's seems to be the way to go because I really don't want to fool around with a cam swap if I can avoid it.

As far as working with AI I see they can take them up to 218 or 226. I would like to see 460+ rwhp combined with as much reliability as possible. I'm not sure if they're a sponsor here so I wont talk about pricing.

Any input on what would be a good value to swap/upgrade as they're getting ported once they're out would be appreciated.


Thanks everyone for the thoughts so far, definitely helping me to get a picture of what I intend to do to the car in the next month or two.

MuhThugga

The dyno sheet doesn't tell the whole story. The thing to pay attention to with the square ports is that camshaft's overlap when street manners come into play. The LS3 heads don't play well with overlap and low-RPM driving, and it will make the car very unpleasant to drive.

06blackGTO

iTrader: (20)

Hmmmm. Really? Could have fooled me then. Since it was my car and I drove it for over 1yr with that setup with no issues besides lifting the heads on nitrous. Drivability was smooth. Could lug it around at 1200rpms. But hey its your story.

KCS

iTrader: (20)

There are actually a lot of people that were unhappy with the way L92 style heads perform with a cam intended for a cathedral headed combo. You can have good driveability with a good tune, but many report the engine feels "soft" at low RPM.

06blackGTO

iTrader: (20)

I totally understand that. It's just that combo happened to work out very well in my gto. Of course it was a m6. Now in my g8 it might have felt like a turd down low. Especially with my stock stall.