Will cutouts "burn up" valves?
Thread Starter
Racer
Joined: Jan 2012
Posts: 321
Likes: 16
From: Ontario
Will cutouts "burn up" valves?
Hey, planning my exhaust right now, and I was thinking about electric cutouts. My dad was saying running open headers risks damaging the valves. How much of a difference will cutouts make vs open headers.
Is this true? Why does it happen? Is there a way to run electric cutouts without damaging valves.
Thanks.
Is this true? Why does it happen? Is there a way to run electric cutouts without damaging valves.
Thanks.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Tghter timing curve, a little more initial, and fatten up the carb a little to compensate for less restricvtive exhaust. Proper tuning is needed any time you make a change. Best done on a dyno.
Thread Starter
Racer
Joined: Jan 2012
Posts: 321
Likes: 16
From: Ontario
So if I have my car tuned for a full exhaust, and I open the cutouts it will run lean.
What if I have the car tuned for open headers/cutouts and then close the cutouts will it run rich and bog on me?
Is there any in between to have the car running good when cutouts are either open or closed?
Thanks.
What if I have the car tuned for open headers/cutouts and then close the cutouts will it run rich and bog on me?
Is there any in between to have the car running good when cutouts are either open or closed?
Thanks.
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Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
So if I have my car tuned for a full exhaust, and I open the cutouts it will run lean.
What if I have the car tuned for open headers/cutouts and then close the cutouts will it run rich and bog on me?
Is there any in between to have the car running good when cutouts are either open or closed?
Thanks.
What if I have the car tuned for open headers/cutouts and then close the cutouts will it run rich and bog on me?
Is there any in between to have the car running good when cutouts are either open or closed?
Thanks.
http://www.msdignition.com/Products/...g_Control.aspx
You will only need a couple degrees advance with cutouts operational. I have one for my nitrous that retards timing when the nitrous is activated.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
I actually dont think you will see much of a difference and I dont think you will burn your valves with cutouts. If you placed them up close to the engine , yes , probably an issue, but you're probably goin to place them back in front of the mufflers so you will be basicly be converting from muffler to 'no' mufflers , but instead of laying on your back and doing it you're doing it with an electric switch. people do that all the time with out changing the tune. However, 63 mako says it best and has the best solution...imho
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
I actually dont think you will see much of a difference and I dont think you will burn your valves with cutouts. If you placed them up close to the engine , yes , probably an issue, but you're probably goin to place them back in front of the mufflers so you will be basicly be converting from muffler to 'no' mufflers , but instead of laying on your back and doing it you're doing it with an electric switch. people do that all the time with out changing the tune. However, 63 mako says it best and has the best solution...imho
probably little difference in performance if you have a good, propely sized system.
Thread Starter
Racer
Joined: Jan 2012
Posts: 321
Likes: 16
From: Ontario
Burning Brakes
Joined: Feb 2012
Posts: 925
Likes: 7
Hey, planning my exhaust right now, and I was thinking about electric cutouts. My dad was saying running open headers risks damaging the valves. How much of a difference will cutouts make vs open headers.
Is this true? Why does it happen? Is there a way to run electric cutouts without damaging valves.
Thanks.
Is this true? Why does it happen? Is there a way to run electric cutouts without damaging valves.
Thanks.
