How do water injected headers work

Thanks for the info guys. So if I'm understanding this correctly, the biggest difference is that the water jacketed header inside of a header is constantly running a flow of water that keeps them a lot cooler and safer in a closed engine compartment. The water injected only runs a small amount of water through them, which means hotter temps that rely on an open compartment to maintain safe with better airflow LOL Thanks.

Now I owe you a few of these. Someone needs to make a great flowing enclosed engine compartment exhaust that will work with tall valve covers. Quote from: electrowoman on May 22, , AM.

The problem with the center risers is that they don't clear tall valve covers. I'd rather have the solid valve train than the center riser. They might cost me a little flow but I won't have to paddle home I have to wonder in the 5, rpm range how much logs and center risers cost in HP. It would be nice to know flow numbers for the different brand logs and center riser manifolds. Image Gallery. What's popular today? Popular Items. What are you looking for Today? Need Help?

Call Categories. Accessories - Jet Header Water Control. Your Price:. Quantity Add to Cart. More Info. On the one hand the steam will occupy some volume in the pipes but on the other hand the water will greatly reduce the temperature and volume of the exhaust gas.

The reduced temperature would increase the local wave speed as well. But as for the net effect of all this I have no idea. It'd be nice to be able to run dry pipes but noise control is important and there simply isn't room for conventional mufflers.

Re: Water injected marine exhausts Post by Nitrousknob » Fri Aug 10, pm I have over the transum headers, and in Arkansas you have to run water injection or mufflers. The reason for water injection is for fire control not to muffle your exhaust sound. I made my own fittings from brass and copper for my water injection.

Works Great! No worry about water getting into the motor at all Had my headers custom built from schoenfeld headers with 12" extenions. Re: Water injected marine exhausts Post by R. Olds » Fri Aug 10, pm You dont need water at idle, so by using a check valve in the system cam overlap is not an issue.

I have never heard of the water being a fire prevention?? If you are running in clean water, pill each header with a. Most drag boat guys run dry headers, but in the testing we have done up to a hp jet boat, if the water is kept to a minimum, the power difference was never noticable.

I've tested this on a Chevy one time where we ran a simple set of car headers, a very fancy set of water jacketed "lightning" headers along with several water cooled log style manifolds. I think that the cooling has a definite detrimental effect when it comes to the wave action inside of the header. I think it probably makes the primaries seem very short and tuning goes out to lunch.

Re: Water injected marine exhausts Post by Schurkey » Sun Aug 12, am Exhaust valve from a marine engine with wet headers. The wet headers on this mild flat-top with big bevel around the circumference pistons have enormous primary pipes.

First Guess: to make room for all the steam.