[QUOTE]Originally posted by Chris 96 WS6
[B]

"I'm just going to go out on a limb and guess this Cadillac cam has a 112 LSA..."


Nope. LSA is not that tight. Remember this cam has NEGATIVE overlap @.050





"I'm not flaming or doubting but I'm still having a hard time seeing how a basically stock LT1 that may have put down 265 if we're generous with the breathing mod gains picked up 43 hp to the wheels with such a small cam, regardless of what the LSA and lift under the curve is. There are no magic cams, and I would think if this kind of power is possible with that small of duration numbers that Crane or Comp would have figured it out years ago considering this is their business and they've invested tremendous time and money in this stuff."

I can't speak for Crane or Comp (neither of which ground this cam), but I doubt they ever tried to make a cam for this application. This application being a stock LT1, and the goal being making as much power as possible and losing absolutely no driveability.

WS6T3RROR's post is on the right track.

This cam at 213/218 has relatively short duration (but still much improved over stock), a wide LSA for minimal seat to seat overlap, a healthy amount of lift, and a (relatively) late intake closing point.

A cam like this has good driveability and torque because of the short duration and almost no overlap, but still makes good high rpm power because of the late intake closing.

 

This is interesting. So it should make more power than a hot cam? Will it pass emissions? I'm thinking about going larger than my hotcam but need to pass emissions.
Kory

 

INTMD8 i'm just curious what you think of the zz4 cam 208/224 112lsa on a stock engine like this. seems to me like it'd probably give up some hp to your cam in the higher range but it would have a stupid tq curve.

oh one more thing i'd like to see so i can get a good picture of what your engine is doing on the dyno if you dont have a graph. I'd like for you to take the avg hp and tq numbers and add them together and then divide by two. thanks

 

I was thinking of getting a hotcam because of drivability and decent power, but you say your cam will add another 20 rwhp over the hotcam and run smoother. Sounds pretty good to me, but would it add more than 50 rwhp if I have a cutout, slp shorty headers and K&N full cold air intake as opposed to the stock manifolds and k&n filter? I'm dynoing 283 rwhp now with the cutout open and I would love to hit 335-340 on just bolt ons plus a cam. Also, how much would it cost for the intall and dyno tune? If you want you can email me at horrorscope103@aol.com

Thanks.

 

It will make more power than an hotcam in a stock application, and it will be easier to pass emissions due to less overlap.

 

It would probably make good torque, but I doubt much more than the 320 I'm seeing out of this cam. What is the intake centerline on the ZZ4?


I do have the dyno graph. I'll post a link to it tomorrow.

 

I can't really say how it would do in your car compared to the hotcam because I've only tried it in a stock application.

Applying the (approximate) 50rwhp gain we saw, to your car, I would assume that you should hit your 335-340 rwhp goal with tuning. Only way to know for sure is to try it

I'll talk to Tom tomorrow and let you know a price on install and dyno tune.

 

looks to me like (only seen it one time) that the zz4 is on a 109 intake center line. i just wanted to see what you thought of it since you knew what i was talking about when i guessed how you made that power (lots of guys are lost on here when it comes to hows and why's of cams). on a dyno test with a stock tune in a 94 vette that only had flowmaster cat back and a k&n drop in filter the guy go 304hp and 341rwtq. and tq is what im after thats what makes it fun to drive on the street every day for me.

Thanks again for you input

 

If it is a 208 @.050 lobe w/a 109 icl, that gives you a 33deg abdc intake closing point.

Good for low end torque (like you said), but IMO at the cost of too much peak HP.

 

so what if i was to install the cam 4 deg retarded. that should make up my hp difference and still keep most of that tq. sorry to be a pain(if i am) its just rare for me to have somebody to talk to about it in this way.

 

That would give you a 37deg abdc intake closing point, and would raise your peak HP RPM, but I think it would help to have more total intake duration to help achieve the desired intake closing point/peak HP rpm rather than retard the cam you have.

If you retard the cam 4deg to achieve 37deg intake closing, than you are opening the valve 9 deg ATDC. It would help power (and not affect driveability), to open the valve sooner, and close it at the same point, because you would still have negative overlap @.050.

 

the way i'm thinking i can come closer to hitting the "sweet spot" with a converter on the zz4 cam than i can with something else(bigger), and the big tq that the cam makes is what i'm after. i know i could probably get more hp out of something slightly bigger like you designed. btw whats the lift on this sucker with 1.6 rockers. and as for not telling the lsa and icl on the cam well it'll all be over with the first time you sell one to a customer by itself. i know i'd have some serious **** to say about a company that didnt give me specs so i could degree the cam for accuracy. not trying to say anything just wondering why you seem to want to keep the specs under your hat. also if you would please tell me why you picked the i/e ratio that you did. just trying to find out all the stuff you know that i dont about lt1 stuff .

 

Keep it up - I'm learning stuff!

From what I've gathered, this cam was designed to be a cam for a "daily driver" car, while still getting great top end. I'm going to have to see how things go, but my setup consists of the following mods:

Corsa catback, SLP headers and y-pipe (but I may swap for longtubes), meziere pump, SLP cai, high flow cat, SFC's, STB. My future mods are a 52mm TB, non-rubber elbow, port matching the heads/intake and a minor port/polish job on the heads. NX wet kit (100 shot). Tune.

My idea was add the lt4 cam and 1.6rr for some more power without a loss of daily driver usage as opposed to the hotcam. You say this cam has been optimized for a "stock" lt1, as in stock bottom end and stock heads? Would you figure the cam would shine even better then it has so far with more breathing mods, or has the cam really been optimized for a stock car? I'm trying to find a local dyno, and would be tuning with ed wright. If I got a few pulls in it's current state and then installed the cam/rr/springs and retuned, that would add more feedback to the cam's true results.

 

Well this thread has inspired me and I'm playing around with Desktop Dyno 2000 and am learning some things. Lets just say the secret is in the intake center line.

INTMD8, I think I'm a believer now. I am going to shoot you an e-mail with a couple of questions...perhaps I can put together a custom grind that will perform as well as the XE503 without giving up much driveability compared to what I'm running now.

 

so where are the graphs?