Cam question with 112 and 114
Thread Starter
Teching In
Joined: Dec 2001
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From: Mildenhall, U.K. Biloxi, MS
Re: Cam question with 112 and 114 Almost all the replies I have looked at say there is an issue with the idle of a Hot Cam. The biggest problem I am seeing is with the A4 and the 112 seperation. That is where I am coming from with this post. Thanks, <img src="gr_grin.gif" border="0">
TECH Enthusiast
Joined: Nov 2001
Posts: 712
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From: Dallas,Texas
Re: Cam question with 112 and 114 see if any of these setups help at all
http://ls1info.com/camstats/showdata.php
if you have a cam installed and have data
to enter
http://ls1info.com/camstats/
http://ls1info.com/camstats/showdata.php
if you have a cam installed and have data
to enter
http://ls1info.com/camstats/
TECH Addict
Joined: Nov 2001
Posts: 2,556
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From: Nawf Carolina
Re: Cam question with 112 and 114 Hammer cam at .050 is 222/222. HOT cam is what, 218/228@.050
Right there we see that the HOT cam has more duration at .050, more duration also hurts the idle. Now the duration at .006" (right off the valve seat) also called the advertised duration, of the HOT cam is probably much greater as well, making it idle worse.
J.
Right there we see that the HOT cam has more duration at .050, more duration also hurts the idle. Now the duration at .006" (right off the valve seat) also called the advertised duration, of the HOT cam is probably much greater as well, making it idle worse.
J.
D(irecto)r Pepper
Joined: Nov 2001
Posts: 1,952
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From: Houston Raceway Park...in TEXAS.
Re: Cam question with 112 and 114 Hammer vs. Hot cam?
1. The hammer uses MUCH faster ramp rates. The valves stay closed longer there by helping idle quality issues.
2. The Hot cam has MORE duration... i.e., a valve is open more of the time on the Hot cam vs. the C1.
3. The Hot cam is a split duration cam vs. the single pattern Hammer.
All of these factors together contribute to a smoother idling Hammer cam. <<<(no knock on the Hot cam here)
Now the Hammer in a car with a loud free flowing exhaust and/or adjustd to idle at low RPM's will lope like mad.
If you have any questions... just email me.
1. The hammer uses MUCH faster ramp rates. The valves stay closed longer there by helping idle quality issues.
2. The Hot cam has MORE duration... i.e., a valve is open more of the time on the Hot cam vs. the C1.
3. The Hot cam is a split duration cam vs. the single pattern Hammer.
All of these factors together contribute to a smoother idling Hammer cam. <<<(no knock on the Hot cam here)
Now the Hammer in a car with a loud free flowing exhaust and/or adjustd to idle at low RPM's will lope like mad.
If you have any questions... just email me.
Thread Starter
Teching In
Joined: Dec 2001
Posts: 28
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From: Mildenhall, U.K. Biloxi, MS
Cam question with 112 and 114 220/220 .564/.564 114 ::: Of the cams you listed I like this one the best.
The 114 will improve it's idle (as compared to my cam) and the numbers will work well with some good heads while providing you a good kick right now. It will be VERY similar to the B1 in performance. It might need some TB work to get it to idle and perform like you would wish.
Hammer cam, 222/222 .566/.566 112, great mid range and top end. Good idle and torque. Some TB work needed to make it work with the stock programming. But lordy does it work for such a small cam.
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I got this from Raughammer's page, and I don't understand how an A4 does not have idle problems with a 112 and 114 seperation. The Hot Cam is a 112 seperation and everyone is saying that idle is a "Big" problem. So how can the Hammer Cam not have an idle problem with the A4? I am definately planning on changing my cam, but also want the driveability of a daily driver(w/stock heads). Could use in light on this subject. Thanks, <img src="gr_eek2.gif" border="0">
The 114 will improve it's idle (as compared to my cam) and the numbers will work well with some good heads while providing you a good kick right now. It will be VERY similar to the B1 in performance. It might need some TB work to get it to idle and perform like you would wish.
Hammer cam, 222/222 .566/.566 112, great mid range and top end. Good idle and torque. Some TB work needed to make it work with the stock programming. But lordy does it work for such a small cam.
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I got this from Raughammer's page, and I don't understand how an A4 does not have idle problems with a 112 and 114 seperation. The Hot Cam is a 112 seperation and everyone is saying that idle is a "Big" problem. So how can the Hammer Cam not have an idle problem with the A4? I am definately planning on changing my cam, but also want the driveability of a daily driver(w/stock heads). Could use in light on this subject. Thanks, <img src="gr_eek2.gif" border="0">
TECH Apprentice
Joined: Nov 2001
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From: Evansville, IN
Re: Cam question with 112 and 114 The hot cam also has a split duration which causes problems. You need to see the durations at .060 as well as they make a big difference in driveability of a cam. I believe the fast ramp rates of the hammer cam help the driveability by allowing it to be closed for a longer amount of time since it can open up faster. I'm pretty sure you would still need programming for it in an a4 though.
Speed freak
Joined: Dec 2001
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From: Tulsa, OK
Re: Cam question with 112 and 114 [quote]Originally posted by Daniel Rivers:
<strong>The Hot Cam is a 112 seperation and everyone is saying that idle is a "Big" problem.</strong><hr></blockquote>
Whos saying that <img src="images/icons/rolleyes.gif" border="0"> ? The only idle problem the hotcam has is surging. The smallest of drill bits used in the TB plate will cure that. Alot of bigger cams have problems like that as well and do need custom tuning. The hotcam doesn't need any.
Miah
<strong>The Hot Cam is a 112 seperation and everyone is saying that idle is a "Big" problem.</strong><hr></blockquote>
Whos saying that <img src="images/icons/rolleyes.gif" border="0"> ? The only idle problem the hotcam has is surging. The smallest of drill bits used in the TB plate will cure that. Alot of bigger cams have problems like that as well and do need custom tuning. The hotcam doesn't need any.
Miah
