![]() That told me that the second plug definately had a positive effect. He said since he didn't have a dyno he couldn't give me hard numbers, but he always fired the modified engines on one set of plugs and set everything and when he hooked up the second set of plugs he would always have to back the idle down and back off on the timing a little. I talked to a guy who rebuilt a lot of Harley engines and had a test stand to break them in on before returning them to the customer, and asked him if the dual plug modification was worth the cost and effort. For years OEM dodge has been the only option. This intake must in many cases be replaced due to the fact that the engines drop valve seats and send metal into the intake manifold. The shovelhead combustion chamber was pretty much a dead ringer for the 426 hemi chamber. We now have for sale a new intake manifold to replace the intake on all 2004 - 2008 Dodge truck 5.7 Hemi applications. Back about 25 years ago when Harley Davidson was still using the shovelhead engine a popular modification was to add a second plug to each cylinder. hemis are ran with dual plugs on nitro for a reason. These new hemis have a very efficient combustion chamber so it may be a moot point, but dual plugs can be more efficient than single plugs. I am going to use the short Taylor plug wires that will fire both plugs at the same time, same setup as the Mopar Performance crate 5.7. These engines have a coilpack that fires both plugs at the same time. In either 05 or 06 (I'm not sure) they changed the setup so both plugs fire on compression. It was done to clean up emissions a little more. He is right about the second plug firing on the exhaust stroke on the first couple of years of the new hemi. I may just go for the bling in that case! A distributor has to be modified in some way to change the curve, and would only fire one plug per cylinder unless you had some sort of dual distributor setup (expensive!) I'm in the process of getting the stuff together to put a 5.7 hemi in my 70 Barracuda, and will be using the Hemi 6 controller and the XV Motorsports manifold unless the Edelbrock dual four proves to be a good performer. It uses the stock coils and can be programmed for the advance curve and has two programmable rev limiters. MSD has come out with a controller called the Hemi 6, and it seems to me that is the way to go. As far as a distributor goes, I read something a while back about someone working on a modified timing cover to use a distributor, but haven't heard any more about it. This manifold is not suitable for use on pollution controlled motor vehicles and is intended only for racing and off-road applications.Ĭontact Southeast Performance for your application and pricing.Putting a carb on a new hemi is no problem, XV Motorsports and Mopar Performance both have single four barrel manifolds available, and Edelbrock is coming out with a dual four manifold (may already be out by now). We are also offering fuel rails to work with this manifold and 4-BBL EFI throttle bodies, as well as complete engine management systems. Our manifolds are designed to flow much more airflow – the missing link to making big HP with the new HEMI engines!ĭon’t want a cone filter under the hood? If you’re putting a new HEMI into an older vehicle or hot rod, this manifold will allow you to run carb style air cleaners, factory air cleaners, functional shaker hoods, etc. If you’re running a bigger cam, worked heads or have a stroker, you’ve only been seeing part of the power you could be making. The manifolds are being offered in either a carbureted or EFI version, with the EFI version machined to accept fuel injectors.įactory manifolds were optimized to make power at factory levels. The manifolds feature a Holley 4150 mounting pattern, which will allow you to run a 4-BBL throttle body or carburetor with this manifold. ![]() Our manifolds were CAD designed, rapid proto-type tested and built to deliver maximum performance. Southeast Performance now offers single plane aluminum intake manifolds to create serious horsepower with the 5.7 and 6.1 HEMI.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |