Streettermaster Intake for 460 RV?

I was just kicking on CL and saw a streetmaster for a song. Is it a good manifold for a 1983 E350 23 foot long. Engine is stock except dougs headers and 50 series Flowmaster. I am trying to pick up a little mpg with out loosing power. I installed the headers and picked up 1 mpg or better. Best before headers was 7.4 with nothing in tow. After headers and pulling a Ford Explorer I got 8.4. I usually tow with it but mostly my 4 wheelers. I just figured for 75 dollars if it would help I would go for it.

I like the Streetmaster. I used one on a 302 Ford and was amazed at the throttle response. Not an RPM manifold by any means, but for low end and throttle response, a pretty decent manifold. Take a ten, five fives and five ones and wad each one up into a ball, then halfway straighten them out and stuff them into your pocket. Go over to the fellow's house and tell him that's all the little woman would allow you for this week.

With mileage numbers that low, you might not notice the increase a manifold swap will give you. 10% is less than 1 MPG. Might make a diff to bottom end torque, though.

!0% would make me happy. That would give 9.2 MPG. That is as good as my 5.8 Bronco. When gas hit 4 bucks a gallon a 10 percent saves would pay for it self. Would you think a little low end torque?

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Originally Posted by Fordz

I was just kicking on CL and saw a streetmaster for a song. Is it a good manifold for a 1983 E350 23 foot long. Engine is stock except dougs headers and 50 series Flowmaster. I am trying to pick up a little mpg with out loosing power. I installed the headers and picked up 1 mpg or better. Best before headers was 7.4 with nothing in tow. After headers and pulling a Ford Explorer I got 8.4. I usually tow with it but mostly my 4 wheelers. I just figured for 75 dollars if it would help I would go for it.

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I believe '83 is one of the years they used the retarded cam gear...an old style chain and gear setup, along with the Streetmaster should help the power and the economy....

If what Dave is thinkin' about the timing set is true, then a swap to a timing set from a '68 to '71 429 would advance the cam and should wake the motor up. As far as I know, it's a bolt-in.

Cam deal is a bolt in----8* retard those retards did---something like 40 ft lbs

I went to cloyes supplier and had a bunch of multi key groove lower gears made---like maybe a 100 or so----but think they are all gone now---makes a big differance( did I say BIG)
Streemaster manifold also a help but don't bother if you don't fix the timing

Thanks guys, I forgot about the timing retard.