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open headers on stock engine

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Old May 26, 2005 | 09:56 PM
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SOM98TA's Avatar
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Default open headers on stock engine

I think I may have to run like this to get to the exhaust shop


is there any downsides to this? could I burn up a valve on the way to the exhaust shop?


how do open headers sound on a stock LS1?



BTW reason for this is I rather install my longtubes then pay a shop 300 dollars to do it..


its a 12 mile drive btw
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Old May 26, 2005 | 10:04 PM
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1. SEARCH. This has been answered MANY TIMES, as recently as a day or two ago
2. You will be perfectly fine. It will be very, very loud and sound awsome. Get on it at least one time.
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Old May 27, 2005 | 07:59 AM
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race cars do it all the time-the only time you will have a problem is if you are running without a header or manifold of any kind (exposed head port)
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Old May 27, 2005 | 08:21 AM
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Yes, the engine will be physically fine. You will however run pig rish at idle because of skewed o2 sensor readings from outside air reversion. Not a big deal, and it will fix itself once you get exhaust on there.
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Old May 27, 2005 | 01:29 PM
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Originally Posted by JohnnyC
race cars do it all the time-the only time you will have a problem is if you are running without a header or manifold of any kind (exposed head port)
Edit: That statement is correct in tha the engine will be physically fine.

Straight open headers do run extremely rich due to atmospheric air getting on the sensors though.

Last edited by blkZ28spt; May 27, 2005 at 01:44 PM.
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Old May 27, 2005 | 01:41 PM
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He was talking about burning up valves, and I answered that question. I made no mention of air-fuel ratios. The race car comparison was for the burt valve question. You are obviously correct about the A/F
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