351 Windsor mods
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351 Windsor mods
i have found out that the windsor engine is a great engine and i was wondering if any one could give me some tips on what modifications work the best on this engine. the engine is stock except for a simple intake. thank you
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From: Page Az.
What year 351? Is it carburetor or EFI. There is lots of things you can do, its just how deep is your wallet. Usually a camshaft swap is a good starting point. What is the simple intake? What is this engine in?
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Sorry for the brief question this is my first time ever posting on a forum. The engine is a 1995 351W with EFI. The simple intake is the equivalent of a low line K&N filter, which is just a cone filter attached to the intake hoses. I really don’t have a whole lot of money right now but any suggestions are welcome as I may have the money this come summer. I have also read that other people have used older 69 parts such as 1969 heads although I’m not sure from what vehicle or if the vehicle matters. Thank you for your help.
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should i go with a muffler or would a glass pack work. im just worried that if i get a local guy to do it, that i wont have the correct back pressure. i was thinking of going with a high flow cat and a glass pack.
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From: Page Az.
If it was me I would go with 2 1/2" dual exhaust with something like flowmasters or turbo mufflers and probably an H pipe. That is my taste, tailor it to your taste and wallet. If you need to run cats, yes use high flow. Don't worry about the lack of back pressure to much.
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ok thanks a bunch. i think that im going to look for long tube headers a high flow cat and a in-expensive muffler then run it out the passingers side in front of the rear wheel. the only way that i would run duals is straight back and i cant thanks to the extra tank and the 4-wheel drive housing on the drivers side.
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ok thanks a bunch. i think that im going to look for long tube headers a high flow cat and a in-expensive muffler then run it out the passingers side in front of the rear wheel. the only way that i would run duals is straight back and i cant thanks to the extra tank and the 4-wheel drive housing on the drivers side.
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From: Hoffman
hi im new to this forum but i have had a lot of ford experiance. i have a 95 bronco with a 351 and i did my own custom exaust. you have no worries. dont worry about back pressure. i removed my cats and made true dual 3 inch exaust with a glass pack and a 4 inch stainless tip on each side going out before the rear tires and it sounds sweet!!! deep sweet performance
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You absolutely don't want any "back-pressure" whatsoever. That would mean pushing hot exhaust gas back into the combustion chamber and limiting the amount of incoming intake charge. That is just as stupid as it sounds, and would only serve to decrease performance.
There is only one benefit that can be realised once the exhaust charge leaves the exhaust port of the head by the exhaust system and it has nothing to do with "back-pressure". It is the principle of exhaust "scavenging" where the suction of one exhaust charge travelling down the exhaust pipe aids another evacuating the chamber.
It has been found that "X" pipes and "H" crossovers improve idle by utilizing this phenomenon, and therefore may be a desirable addition over a straight "true" dual system.
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From: Hoffman
you guys are right on the money its all about getting the right headers for your engine to get good scavenging then its all about flow flow flow. the faster exaust gets out the more clean air can enter on the down stroke
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Hot gas (exhaust) flows faster than cold gas. Big pipes allow the gas to cool too quickly which can slow velocity. This can hurt low end power. You dont have to worry about this as much with race cars running high rpms and open headers because they are leaving at higher rpms and relying more on HP to win the race. Thats why small tube headers and Tri Y designs are better for low rpm motors. It all depends on what you plan to do with the car or truck. 0 back pressure CAN hurt performance
