Cam duration and engine displacement
12-07-2001, 07:58 PM
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Cam duration and engine displacement I will in a couple of weeks be getting an MTI 422 (the wait makes me feel like a little kid right in front of Christmas). While I know some stuff about cams, I am not sure what happens to engine performance characteristics for a particular cam size when the engine displacement is increased. For example, I am thinking of putting in something along the lines of a single pattern 227 or 228 duration 112 LSA (about .55 or .56 max lift). Coupled with the stage III heads, I am hoping this will be streetable, but need to make sure.
In a stock displacement engine, that would definitely be a large cam, but I have heard that this would not be bad with a larger displacement engine. Anyone know more about this?
[ December 07, 2001: Message edited by: WeatherGuy ]</p>
In a stock displacement engine, that would definitely be a large cam, but I have heard that this would not be bad with a larger displacement engine. Anyone know more about this?
[ December 07, 2001: Message edited by: WeatherGuy ]</p>
12-07-2001, 08:41 PM
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Re: Cam duration and engine displacement Very streetable in my opinion. I'd consider something with duration between 230 and 240 to be somewhat streetable. Lift maybe in the low .600's. Just guessing. Talk to Jason and tell him what exactly you are looking for and he should be able to help.
If you haven't already comitted to the engine then you have plenty of time to work out the specs.
If you haven't already comitted to the engine then you have plenty of time to work out the specs.
12-07-2001, 08:47 PM
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Re: Cam duration and engine displacement [quote]Originally posted by DerekHLS1Freak:
<strong>Very streetable in my opinion. I'd consider something with duration between 230 and 240 to be somewhat streetable. Lift maybe in the low .600's. Just guessing. Talk to Jason and tell him what exactly you are looking for and he should be able to help.
If you haven't already comitted to the engine then you have plenty of time to work out the specs.</strong><hr></blockquote>
Thanks for the reply. I will be out there (at MTI) tomorrow replacing my POS stock rotors with Eradispeeds - I will be sure to talk with them about it. Generally, like most people, I want to get away with as much as I can and still have a daily driver.
<strong>Very streetable in my opinion. I'd consider something with duration between 230 and 240 to be somewhat streetable. Lift maybe in the low .600's. Just guessing. Talk to Jason and tell him what exactly you are looking for and he should be able to help.
If you haven't already comitted to the engine then you have plenty of time to work out the specs.</strong><hr></blockquote>
Thanks for the reply. I will be out there (at MTI) tomorrow replacing my POS stock rotors with Eradispeeds - I will be sure to talk with them about it. Generally, like most people, I want to get away with as much as I can and still have a daily driver.
12-08-2001, 01:05 AM
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Re: Cam duration and engine displacement WeatherGuy....
Certainly a larger displacement engine will require more cam. Thats just a fact. I think the cam you listed would be [perfect] for a 422. However, if I was doing it, I would stick with a 114 LSA. Why; It will idle better... Period. Many folks like the 112 LSA becouse it gives slightly more mid-range torque/HP at the expense of idle quality and high RPM torque/HP.
Well, you will have all the torque/HP at mid-range you could ever want with that 422, and then some.
Put a 114 LSA in it, and at least have less PCM/idle problems and a 422 that will pull harder where it really starts to shine.... Towards the top of its rev limit.
Remember, its still a daily driver (I guess)
Just my opinion,
Ron
[ December 08, 2001: Message edited by: Kimchee and Rice ]</p>
Certainly a larger displacement engine will require more cam. Thats just a fact. I think the cam you listed would be [perfect] for a 422. However, if I was doing it, I would stick with a 114 LSA. Why; It will idle better... Period. Many folks like the 112 LSA becouse it gives slightly more mid-range torque/HP at the expense of idle quality and high RPM torque/HP.
Well, you will have all the torque/HP at mid-range you could ever want with that 422, and then some.
Put a 114 LSA in it, and at least have less PCM/idle problems and a 422 that will pull harder where it really starts to shine.... Towards the top of its rev limit.
Remember, its still a daily driver (I guess)
Just my opinion,
Ron
[ December 08, 2001: Message edited by: Kimchee and Rice ]</p>
12-08-2001, 03:41 PM
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Re: Cam duration and engine displacement I was out at MTI today getting Eradispeeds (gawd those look great <img src="images/icons/smile.gif" border="0"> ) and a Pro 5.0. While there, I talked to Jayson and one other person about cams - seems that they like a 232/236 114 with max .57? lift in the 422 for what I want. Not going to argue with the guys who build the motor.
I was told that this combo along with FLPs and a cutout should be able to get about 470 RWHP on the 422 <img src="images/icons/shocked.gif" border="0"> I am already drooling <img src="images/icons/grin.gif" border="0">
I was told that this combo along with FLPs and a cutout should be able to get about 470 RWHP on the 422 <img src="images/icons/shocked.gif" border="0"> I am already drooling <img src="images/icons/grin.gif" border="0">
