LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Need Cam advice and info...

Old May 21, 2003 | 08:04 AM
  #1  
ZMEFLY's Avatar
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Question Need Cam advice and info...

Is it bigger or better than the "Hot Cam"?

(High Performance street w-100-150 HP nitrous or blower
Dur@.050 218-230 | Lift .495-.510 | LSA 114 | RPM Range 1600-5900)

What about these two cams?

(Comp LT-1 Xtreme Energy Cam , good with modified computer and exhaust
Dur@.050 218-224 | Lift .495-.503 | LSA 112 | RPM Range 1500-5500)

Would this cam be too much for what I have? And would it pass emissions?

(Comp LT-1 Xtreme Energy Cam, 2000+ converter, gears, choppy idle
Dur@.050 224-230 | Lift .503-.510 | Lift 112 | RPM Range 1800-5800)

Should I consider one of these cams or just get the LT4 Hot Cam kit?

Keep in mind, this is my daily driver and I have to pass emissions here in Houston.

Thanks for your help!!!

Also let me know where the best place to get the cam. (Price)
Old May 21, 2003 | 09:22 AM
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I'm not gonna act like I know too much about the whole cam situation but I'll offer my suggestion. From what I hear the Hot Cam kit is very good for a daily driver...and makes decent power. But it's not a very big cam and you could get away with going a little bigger. If money isn't an option I would go slightly bigger. However you can't beat the price of the Hot Cam kit. I hear average is 30RWHP with the kit. Not too shabby IMHO.
the cheapest place I believe is here:
http://www.sdpc2000.com/cart.asp?act...d=993&pid=1900

Hope this helps a little..I'm sure some people who are very knowledgable about the Cams will chime in.
Old May 21, 2003 | 09:59 AM
  #3  
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From: looking for a flow bench so Brook and I can race
the first looks a blower/ntirous cam?



i would evaluate my goals, limits and all that before chosing a cam.

How much power?
what heads?
ported heads?
powerband location?
emissions?
how much lope are u willing to tollerate?

all questions you should ask youself

generic answer?

224/230 on a 114 to help pass emissions


edit:
dont buy it there-
go to www.cmotorsports.com if you want it before you have grandkids... and if you want the cam you asked for
Old May 21, 2003 | 03:48 PM
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Most power I can get and pass emissions. Stock heads. Probably low to mid range power range.
Old May 21, 2003 | 04:14 PM
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I wouldn't get a cam. either get better heads first or get the ones you have ported and polished for more airflow. A cam might get you alittle more power, but it will probably affect your idle quality. If you have the heads fully ported and add a nice cam to compliment it you could probably get a minimum of 60hp or more. This is what I read in book (not exactly this), I still have yet to do this when I buildup my car.
Old May 21, 2003 | 04:41 PM
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From: looking for a flow bench so Brook and I can race
Originally posted by ZMEFLY
Most power I can get and pass emissions. Stock heads. Probably low to mid range power range.
for low to midrange i'd take a 224/230 on a 112... on stock heads...

maybe someoen can tell us if he'd pass- if not 114 will pass you

look in advanced tech for the thread called "using LSA to adjust powerband" or something like that
Old May 21, 2003 | 05:01 PM
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Go to comp cams website. Fill out the form and have them recommend one for you. This is only second best because you don't know how the timing works yourself. There is a book by David Vizard that is just on cams and cam timing. I would get that if you want to really pull some power. It also talks about the other stuff you should do BEFORE you get a good cam to make it more worth the money. I started reading the book and found that I needed to read some others first..
Old May 23, 2003 | 08:42 AM
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I will look into that.
Old May 23, 2003 | 08:55 AM
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actually if you are interested in the books, I have a few by the guy and I can post the names of them if you want (they are in the car or I would post them now). There's the one for the teardown and rebuild of the engine. That's the starting book. The second one if a performance book that he writes that will show you power performance stuff you can do yourself for cheap and even though all he talks about is carbs, I would recommend fuel injection because unless you are making a race only car, it'll just be a gas hog that doesn't give you that much power at partial open throtle (car craft had an article on this). I would go with those 2 for starters.
Old May 23, 2003 | 10:36 AM
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Here is the reply from Comp Cams:

Our cam part number 07-502-8 would work very well in your application. The lift however, is .495/.503 when used with a 1.5 rocker, so I'd suggest passing on the 1.6s, unless you're planning on some pretty extensive port work and don't mind cutting the heads to accept a larger diameter valve spring. The RPM range of this cam is from 1500-5500 or so, but will be substantially stronger than your stock cam within that range.
If you have any further questions, please let me know.


Here is the cam he is suggesting:

Comp LT-1 Xtreme Energy Cam , good with modified computer and exhaust
Dur@.050 218-224 | Lift .495-.503 | LSA 112 | RPM Range 1500-5500

He says to use my stock rockers and springs. Any input on that?
Old May 23, 2003 | 10:47 AM
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Question

Does that cam with the stock rockers and springs look better than just getting the LT4 cam kit?
Old May 23, 2003 | 10:55 AM
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Originally posted by ZMEFLY
Here is the reply from Comp Cams:

Our cam part number 07-502-8 would work very well in your application. The lift however, is .495/.503 when used with a 1.5 rocker, so I'd suggest passing on the 1.6s, unless you're planning on some pretty extensive port work and don't mind cutting the heads to accept a larger diameter valve spring. The RPM range of this cam is from 1500-5500 or so, but will be substantially stronger than your stock cam within that range.
If you have any further questions, please let me know.


Here is the cam he is suggesting:

Comp LT-1 Xtreme Energy Cam , good with modified computer and exhaust
Dur@.050 218-224 | Lift .495-.503 | LSA 112 | RPM Range 1500-5500

He says to use my stock rockers and springs. Any input on that?
Grrr, I hate Comp Cams "tech" support. I was going to suggest that your forgo them yesterday but I've been out of the loop and hoped that they had changed. They haven't. They consistantly suggest very small cams. Actually this is one of the larger cams I've seen them suggest for a "mild" application.

Ok, that cam would probably be fine if you really want mild. The HOT cam is 218/226, .492i / .492e (@1.5), 112. So that gives you an idea on the size cam they are suggesting.

I would not in no way shape or form consider using stock springs on any larger than stock cam. I wouldn't (and didn't originally) use them even with just 1.6RR.

I agree with the above, for what you want to do I dont think you can do better than the LT4 HOT kit. You get the cam, springs (and hardware) and 1.6 RR. You will get a very nice gain and a very nice price. And you should have little problem tuning to pass emissions.

If you want to go bigger than the HOT then go BIGGER. I have the 224/230 and I like it much but I dont have to even think about emissions testing (kinda kicking myself for not going with the 230/236 as the 224/230 is pretty darn mild in my opinion.

Well, enough rambling. Good luck with whatever you choose.
Old May 23, 2003 | 10:58 AM
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how much is it going to cost? What you got was a retail bs answer. I am not going to say I know everything yet, but I did work for bestbuy and staples and I know that there is no way you tell a customer that you can spend money somewhere else to get more performance or whatever when you are shopping browsing around and especially when looking for suggestions. You'll probably won't feel the performance because the rest of your system is bottle necked (not just the intake but the exhaust too). I could be wrong, but from what I've read so far, nothing great was done with just a cam unless stock was an already high flowing system. Also, you can just get 1.6/1 rocker arms installed that will give you more lift for more flow for more power for the least amount of money.
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