Cam question
Thread Starter
Safety Car
Joined: Sep 2000
Posts: 4,679
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From: Charles Town WV
Cam question
I found a good deal on a lunati cam and I'm interested if this is a good cam profile to use on a 468. I have a 4 speed, so I want a lumpy idle, but I don't want the thing to be unstreetable. Is this too mild, too wild? What should I expect from this cam. I haven't bought it yet.
Thanks
RPM Range: 1500-4500 Duration @.050: intake 204 deg, exhaust 214 deg opens/closes @ .050: intake -06deg BTC 43deg ABC exhaust 43deg BBC -09deg ATC
Thanks
RPM Range: 1500-4500 Duration @.050: intake 204 deg, exhaust 214 deg opens/closes @ .050: intake -06deg BTC 43deg ABC exhaust 43deg BBC -09deg ATC
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
Re: Cam question (Steve Straus)
204 and 214 Duration at .050. That sounds very mild. You won't get a lumpy idle with that cam on a 468. I would think you should go to around 230+ on duration at .050 to start to get a lumpy idle. I personally like around 240 to 250 at .050. The cam you are looking at is a mild street cam
Thread Starter
Safety Car
Joined: Sep 2000
Posts: 4,679
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From: Charles Town WV
Re: Cam question (Gordonm)
204 and 214 Duration at .050. That sounds very mild. You won't get a lumpy idle with that cam on a 468. I would think you should go to around 230+ on duration at .050 to start to get a lumpy idle. I personally like around 240 to 250 at .050. The cam you are looking at is a mild street cam
http://cgi.ebay.com/ebaymotors/aw-cg...434204&r=0&t=0
[Modified by Steve Straus, 5:19 PM 1/19/2002]
Thread Starter
Safety Car
Joined: Sep 2000
Posts: 4,679
Likes: 6
From: Charles Town WV
Re: Cam question (Jvette73)
Check out the Compcams XE268 or XE274. The 274 will give you some rumble in a bigblock @ 1800 to 6000 rpm.
[Modified by Steve Straus, 5:19 PM 1/19/2002]
Safety Car
Joined: Aug 2000
Posts: 3,909
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From: Clymer PA
Re: Cam question (Steve Straus)
Steve:
I agree with Gordon, that is a really mild cam for a big block. This rebuild I'm going with the Comp Cams 294S solid lifter cam. I'm going to see how I like it, if I find it unstreetable I'll kick it down a notch to the 282S...I'm hoping this won't be the case :). If you are after a hydraulic cam many people on this forum who are rebuilding 454s seem to be going with the Comp Cams XE274.
I agree with Gordon, that is a really mild cam for a big block. This rebuild I'm going with the Comp Cams 294S solid lifter cam. I'm going to see how I like it, if I find it unstreetable I'll kick it down a notch to the 282S...I'm hoping this won't be the case :). If you are after a hydraulic cam many people on this forum who are rebuilding 454s seem to be going with the Comp Cams XE274.
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Race Director
Joined: Apr 1999
Posts: 11,520
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From: CORVETTE 77 385 C.I. TEXAS
Re: Cam question (bence13_33)
Steve
You want a min. Comp Cams 280H or XE274.
350 guys
No need to check the link on that cam. Would put more cam in a girl's stock auto. ! Slightly better than stock L-48 cam.
You want a min. Comp Cams 280H or XE274.
350 guys
No need to check the link on that cam. Would put more cam in a girl's stock auto. ! Slightly better than stock L-48 cam.
Le Mans Master
Joined: Sep 2000
Posts: 5,635
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From: Orlando Floriduh
Re: Cam question (Steve Straus)
Steve... Some of the older cams from the 60's-70's had real nice lopey idles and still were streetable. Newer technoligy cams develope more power and torque without sounding like a race car. The newer cams are designed to work good on today's stuff. Most cams of today are designed to work with lower compression so you can use the pump gas that we get today.
Safety Car
Joined: Jun 2001
Posts: 4,004
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From: Severna Park Md
Re: Cam question (silvervetteman)
A good question is what compression will you be running? There is such a wide variaty of cams to select from you can match your cam perfectly to your ratio for the best performance from your setup. Higher compression will be pump gas tollerable if the cam is the big enough.
Thread Starter
Safety Car
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From: Charles Town WV
Re: Cam question (Jvette73)
A good question is what compression will you be running? There is such a wide variaty of cams to select from you can match your cam perfectly to your ratio for the best performance from your setup. Higher compression will be pump gas tollerable if the cam is the big enough.
I was planning on running 92 octane in the car. I want this car to make a lot of HP and sound REALLY mean.
I understand fully how a cam works, I just haven't done enough with cams to be able to know what duration, lobe seperation (I assume 110 degree) etc. I should be looking for. I don't want to turn this topic into a huge thread because I know this has been discussed to death on this forum :).
Drifting
Joined: Jan 2000
Posts: 1,612
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From: Phoenix Arizona
Re: Cam question (Steve Straus)
Steve,
That Lunati cam is quite mild. The '74 hydraulic cam was a 212/214 (intake/exhaust duration at .050)!!!
As some of the others stated, the XE-274H (Comp Cams) is a great choice for the BB buildup.
230/236 Duration at .050 (intake/exhaust)
.552/.555 lift
110 LSA
Chevy High Performance got 480Hp with this cam and the following:
9.0 to one CR
Demon 850
Performer RPM intake
I bought the cam and now I am wondering if I should go with Comp Cams roller version which is similiar in duration (230/236), with less lift, and 112 LSA than the XE274H. (It is a Extreme Marine roller cam)
(I haven't decided to go for it yet because those cams are expensive with the roller lifters!!!)
Bob :cheers:
[Modified by Bob Turner, 12:52 AM 1/20/2002]
That Lunati cam is quite mild. The '74 hydraulic cam was a 212/214 (intake/exhaust duration at .050)!!!
As some of the others stated, the XE-274H (Comp Cams) is a great choice for the BB buildup.
230/236 Duration at .050 (intake/exhaust)
.552/.555 lift
110 LSA
Chevy High Performance got 480Hp with this cam and the following:
9.0 to one CR
Demon 850
Performer RPM intake
I bought the cam and now I am wondering if I should go with Comp Cams roller version which is similiar in duration (230/236), with less lift, and 112 LSA than the XE274H. (It is a Extreme Marine roller cam)
(I haven't decided to go for it yet because those cams are expensive with the roller lifters!!!)
Bob :cheers:
[Modified by Bob Turner, 12:52 AM 1/20/2002]
Burning Brakes
Joined: Aug 2000
Posts: 1,211
Likes: 6
Re: Cam question (Steve Straus)
Steve, if you like Crane cams ask their techs what would happen to the H-278 Powermax cam if they dropped the LSA from 112 down to 110 or even 108. That's a good cam for your compression. I am thinking big block application so I reread your post and you have a 350 so it might not be the best idea for you.
Ganey is the cam "Guru" so ask him for a specific recommendation. My limited knowledge is that the higher the duration numbers and the lower the LSA the more "rumble" you get at idle.
Good Luck, Mark :flag :chevy
Ganey is the cam "Guru" so ask him for a specific recommendation. My limited knowledge is that the higher the duration numbers and the lower the LSA the more "rumble" you get at idle.
Good Luck, Mark :flag :chevy
Thread Starter
Safety Car
Joined: Sep 2000
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From: Charles Town WV
Re: Cam question (marky mark)
Steve, if you like Crane cams ask their techs what would happen to the H-278 Powermax cam if they dropped the LSA from 112 down to 110 or even 108. That's a good cam for your compression. I am thinking big block application so I reread your post and you have a 350 so it might not be the best idea for you.
Ganey is the cam "Guru" so ask him for a specific recommendation. My limited knowledge is that the higher the duration numbers and the lower the LSA the more "rumble" you get at idle.
Good Luck, Mark :flag :chevy
Ganey is the cam "Guru" so ask him for a specific recommendation. My limited knowledge is that the higher the duration numbers and the lower the LSA the more "rumble" you get at idle.
Good Luck, Mark :flag :chevy
