I am kinda in the same boat. I got a set of LE2 heads and cam combo for my 96 Impala SS. The cam Lloyd sent has a higher lift, tighter lope separation but a smaller duration than the CC503 I currently run. I ran it on desktop dyno and it didnt come out much different than what I have now. So I am undecided on whether to install the cam or not. How can I get ahold of Bret to ask some questions. I don't want to go through the trouble of installing it if there is not going to be any gains.
HVY SS

 

Unless you know the actual lobe profile, agressiveness, etc. and unless Desktop Dyno is sophisticated enough to accept those kind of things, you probably wouldn't see a whole lot of difference on DD. The car might, however.

Bret is SStrokerAce here.

 

You can always just ask hvyss....

The DD2000 not showing you any difference is no suprise, but believe me on a 396 there is definately going to be a difference. Not to mention the lobe profiles and how that effects valve control are better with your new cam.

As I say it's not about the numbers but about the physics.

Roadtrip... dam didn't know you had to go that lean on the CC306 to get there...

So to compare... same setup but less gear, more weight, 5 more cubes and a richer tune in the car that won. Again it aint perfect, but i'm not complaining.

Bret

 

What's this LE2.1 cam you're talking about? How's it different from the regular LE2?

 

The LE cams have been revised..... kinda like software updates. Started off with a LE2, then the LE2.1 which was in this example and now the LE2.2

Just looking for more average power or other things to fit the setups better. If you order a LE2 cam from Lloyd you get the newest example.

Bret

 

Bret,

How high does that Le 2.2 cam need to be spun?

Thanks

 

Joe takes his to 6700rpm most of the time, when he races me or Zach that thing is all over 7,000. its still making power!

Zach runs his up about the same 6700-6800max


Bret- Joe didn't want to tune Zach's car for that lean, but he wanted the numbers. He might richen it back up for the nitrous.

B-rad

 

Yep same as the rest.... I work more on getting the TQ curve fat than raising the RPM you need to turn the motor. Going to a LE3 setup would be the way to go for that.

B-rad, I'm guessing Joe's setup was at 13.0:1 when he was doing 400rwhp so there is a good 13rwhp difference if the AF's are equal.

Bret

 

HI Bret,

So you're saying that it would be better for me to go with the LE 3 to keep the RPMS down?

I just bought a rebuilt stock shortblock to run until my 381 gets finished and I don't really want to spin it to 7k. It does seem like a lot of people are spinning stock short blocks pretty high and having good luck

 

No the higher the LE number the higher the RPM. The LE3 is a 7000rpm setup.

If you are comfortable in the RPM range that these guys are talking about in this thread then go with the LE2, if you want to keep it to 6000rpm peak (and shift a little past that) then the LE1 cam is what you want. You can't expect huge numbers from that but it doesn't mean it will be slow, remember we are working on the average TQ numbers in the RPM range that the cam is designed for.

Bret

 

Can you spin a stock-bottom LT1 w/ LE3 at 7k w/o problems as long as your valvetrain is set up for it or are you going to spin a bearing? Whats the limit with stock bottom end? How come Lloyd's site doesnt show his cams were updated?

 

Here is the vid LE2.1 vs; cc306

Just posted it might take a min to load/optimized

http://video.ls1tech.com/player.aspx...9-9B89F6CB1912

 

ahhh that sounds so good.
-b

 

It's going to be a short life on a stock bottom end going to 7K.... also the bigger cam is only usefull if you have a lot of gear and stall and have a car that launches this is not a street type setup in comparison to the LE2 or LE1

Because only the specs have slightly changed the application has not.

Bret

 

Hey roadtrip was it alot of work to get that LS1 lid type setup that you got going there to work or no? I want to do this myself but I don't want to hack my car up too much. Also are those scorpion 1.7rrs? How much did it cost about if you don't mind me asking to do the RR swap? These are going to be my 2 winter projects