a 224 on a 114 or 115LSA will work great...
OK dumb LS1 cam question
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From: All humans are vermin in the eyes of Guru VA
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OK dumb LS1 cam question
I have an F-body and I am looking to upgrade my camshaft as part of my efforts to make it the car I want it too be. Other things that are planned are a cat-back, and an intake. I am really not in the mood for ported heads, or any of that silliness. I already have 1 motor disassembled in my townhouse from my C3. A cam swap is about the most intensive mod I want to make. Its an Auto, and its been tuned by violator.
I am looking for
around the same RPM range as stock, but with a much more aggressive sounding idle, so I think that I am going to have to drop the LSA to around 112 or so.
It also has to pass emissions here in VA so that is also a concern and why I am not going to go with long tubes all that jazz. Its a driver that I just want to idle more aggressively and have more power.
On that note, if I cant do that I would like to maintain the RPM range and just go faster.
So I am looking at this Lunati cam
Advertised Duration IN/EX: 270/279
Duration @.050 IN/EX: 212/221
Gross Valve Lift IN/EX: .510"/.510"
Lobe Sep Angle / Intake Ctr Line: 116/112
Valve Lash IN/EX: Hyd/Hyd
RPM Range: 1800-4800
I am looking for
around the same RPM range as stock, but with a much more aggressive sounding idle, so I think that I am going to have to drop the LSA to around 112 or so.
It also has to pass emissions here in VA so that is also a concern and why I am not going to go with long tubes all that jazz. Its a driver that I just want to idle more aggressively and have more power.
On that note, if I cant do that I would like to maintain the RPM range and just go faster.
So I am looking at this Lunati cam
Advertised Duration IN/EX: 270/279
Duration @.050 IN/EX: 212/221
Gross Valve Lift IN/EX: .510"/.510"
Lobe Sep Angle / Intake Ctr Line: 116/112
Valve Lash IN/EX: Hyd/Hyd
RPM Range: 1800-4800
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From: All humans are vermin in the eyes of Guru VA
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224 on a 114, sounds reasonable?
Where do you think it will make peak power. Stock I am making it at 5200rpm on a chasis dyno.
Where do you think it will make peak power. Stock I am making it at 5200rpm on a chasis dyno.
Burning Brakes
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From: Derry NH
With such an increase in duration your power band will move up a lot. With my 224 I have a fairly flat HP peak that runs from 6200-6500 RPM.
Comp makes a small cam (206/212) and they advertise the powerband to be 800-5800. Also, it has a 112 LSA. You will need springs, but with a cam like this yellow LS6 springs would be fine (max lift for this cam is .522)
Comp makes a small cam (206/212) and they advertise the powerband to be 800-5800. Also, it has a 112 LSA. You will need springs, but with a cam like this yellow LS6 springs would be fine (max lift for this cam is .522)
Last edited by Casem1; Apr 18, 2006 at 08:10 AM.
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From: All humans are vermin in the eyes of Guru VA
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Interesting, so the 224 cam is out. So whats the deal with the lunati cam above? It seems to have an aweful lot of duration for what you are saying.
Le Mans Master
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From: San Marcos Texas
220 is the min I would go if going through the trouble.
Thunder Racing Custom Camshaft - 220/220 .551/.551 114 LSA
MTI Stealth I 220 220 .581 .581 115 LSA
Stealth II 224 220 .581 .581 116 LSA
Texas Speed 220/220 .581/.581 114LSA
All good choices and should pass smog with ease. And they will all make more power than stock throughout the entire power band from idle up.....
Thunder Racing Custom Camshaft - 220/220 .551/.551 114 LSA
MTI Stealth I 220 220 .581 .581 115 LSA
Stealth II 224 220 .581 .581 116 LSA
Texas Speed 220/220 .581/.581 114LSA
All good choices and should pass smog with ease. And they will all make more power than stock throughout the entire power band from idle up.....
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Burning Brakes
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From: Derry NH
Originally Posted by chriswtx
220 is the min I would go if going through the trouble.
Guru_4_hire, the Lunatic cam you mention has 116 LSA, I thought you wanted a 112? A 116 will idle really smooth.
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From: All humans are vermin in the eyes of Guru VA
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I really cant exceed 5600 rpm because it pegs the dyno at 150mph, and I dont really intend a cam swap.
I would like the rougher idle sound, but if its not really feasible given my other requirements well then something has to give.
I would like the rougher idle sound, but if its not really feasible given my other requirements well then something has to give.
Burning Brakes
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From: Derry NH
It is feasible. A lot of the performance cams have lower LSA's but if you find some cam specs you like but want them on a lower LSA have it custom ground. Generally, there is no difference in price as the cam you buy is likely not an off the shelf item anyway. When I ordered my cam from a supporting tuner the cam actually came direct from Comp.
Drifting
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From: Annandale VA
Couple of points here. First, on the Lunati cam that was mentioned, the LSA is 112, and the intake centerline in 116. This means that the cam is advanced 4 degrees, which is very standard on most aftermarket cams.
Second, although it's true that a cam with more duration will move the power band up somewhat, it's almost invisible on a dyno graph, which typically starts at 2K to 2500 RPMs. I have seen dozens of dyno graphs comparing cams of varying durations. In almost every case, the cam with more duration shows power gains throughout the RPM range. Usually the peak TQ occurs at approximately the the same RPM, regardless of duration. With the larger duration cam, the power loss occurs below 2K RPMs. You can feel it on the road, but you don't see it on the dyno graph.
I previously had a 218/224 114 LSA cam in an LS1, w/ shorty Edelbrock headers and OEM cats. It was almost impossible to detect the cam at idle, and it passed VA emissions with ease. It made over 380 TQ/HP, and still got over 20 MPG.
In my opinion, 212 duration is ultra conservative, and will only result in a 20 HP gain, maybe even less.
Second, although it's true that a cam with more duration will move the power band up somewhat, it's almost invisible on a dyno graph, which typically starts at 2K to 2500 RPMs. I have seen dozens of dyno graphs comparing cams of varying durations. In almost every case, the cam with more duration shows power gains throughout the RPM range. Usually the peak TQ occurs at approximately the the same RPM, regardless of duration. With the larger duration cam, the power loss occurs below 2K RPMs. You can feel it on the road, but you don't see it on the dyno graph.
I previously had a 218/224 114 LSA cam in an LS1, w/ shorty Edelbrock headers and OEM cats. It was almost impossible to detect the cam at idle, and it passed VA emissions with ease. It made over 380 TQ/HP, and still got over 20 MPG.
In my opinion, 212 duration is ultra conservative, and will only result in a 20 HP gain, maybe even less.
