1roc89z28

i want a stock idle sounding after market cam. should i stay whit the 243 heads and find the best sleeper cam or should i got l92 heads and look for the best sleeper cam. any advice thanks

Atilla the Fun

http://www.thunderracing.com/shop-by...-Cams_944.html

1roc89z28

ive seen those. what im asking is ' would i make more power whit the l92 heads or whit 243 heads, for a sleeper cam.

Atilla the Fun

If you're wanting 550 HP at 6400 RPM, say, then use the L92 heads. If you're okay with 450 HP at 5600 RPM, and want more average power below that RPM, then use 243 heads with a custom-spec cam.

Orr89RocZ

iTrader: (20)

550 with a cheater cam on ls2 with l92 heads? That i'd like to see LS7 is 500hp with better heads and similar sized cam. Just seems optimistic and 6400 rpm peaks on a LS2 usually takes abit more cam.

milled 243's with cheater cam is usually close to 400whp with LS6 intake. Very stout combo. Cant go wrong either way.

Being that you already have a LS2 i'd just keep the same intake and 243 heads and mild cam it. It should be close to 400whp without much effort, possibly more. I've seen a 06 vette LS2 make 418whp with the ls2 cheatr and ported heads and no other mods. Stock manifolds/exhaust. With more exhaust mods and tune it probably make great power. Stock heads with exhaust/tune it should come back up to near 400whp or so.

Atilla the Fun

So the numbers I picked out of thin air, to make a point, were a bit optimistic. No, wait, 450 at 5600 isn't optimistic, that one has been done. Actually, it was 462 HP. And the torque at 1600 rpm was better than the stock LQx cam. I liked that.

Orr89RocZ

iTrader: (20)

On the 450 at 5600, did it have headers/exhaust? With the mention of LQx cam was this a 6.0 truck motor with 243 heads? Which intake was tested? LS2, LS6, Truck? Just curious because it all can effect the power band/rpm range.

450 doesnt sound optimistic, infact it may be abit low 460's is abit better. But the L92 setup does seem abit high for the cheatr cam. I havent seen that combo dyno'd but I wouldnt think it be much over 420-440whp on a LS2. Hard to say without doing it. I just know the cheatr's work well with cathedral ports. Definately a good torquey motor with no real hint of cam sound.

1roc89z28

i assume you guys are talking flywheel numbers. so im better of with whit 243 heads? since i would think that a sleeper cam would work better whit l92 heads since they like smaller cams. but thats why im here for you guys to shed some light on me.... im looking for the best track times not just dyno numbers

Orr89RocZ

iTrader: (20)

All depends on what you want and how much you want to spend. I just found a link to a 08 LS3 vette with headers and cheater v.3 cam that made 420whp, 393wtq.
http://blog.thunderracing.com/2010/0...l-in-08-vette/

I've seen LS2's with 243's and headers get near that too so not sure what there is to gain with that small cam on those combinations. L92's may make a touch more power than 243's but its hard to say. L92's usually require different cams than cathedral ports and I believe the cheatrs were designed for cathedral ports even tho they have produced good numbers on rectangular ports

Atilla the Fun

I think Orr is using power at the tires, I use power at the crankshaft. an LQ9 with L92 heads, headers, and a 210/218-114 cam, did 462 HP @ 5600, and 461 TQ @ 4800. This is good for everything, but it lacks any ..um.. character? I can see the L92 heads going well with "baby" cams, because otherwise you need lots of gear and a loose converter. But do those, and the L92 heads are the better choice for making more power with a large Cheatr-style cam.

Orr89RocZ

iTrader: (20)

Yes I'm talking whp since most of these combinations are tried in cars with motors already in them and have no way to engine dyno. They chassis dyno on dynojets most commonly. You an assume 12-15% loss with 6spd which seems common if you trust the factory hp ratings for those motors vs what they actually dyno, and 18-20% for automatics.

I'm doing some ported 243's for my ls1 and a cam likely in the higher 220's duration for a good all around street strip car. Easy 11 second ride, as its been 12.15 with just bolt ons. Another 100whp or so more cant go wrong Still should drive well even with 3200 stall thats in it.

No sleeper tho, you'll hear that cam. A good quiet exhaust can help hide it tho.

1roc89z28

yeah my car is a auto. and i will trow a converter to match the cam. im thinking somewere below 220 duration. becouse it seems after 220s you start hearing the lope. and i was also talking rwhp . thats why i was a bit confused.