streetmaster 390 info?
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Junior User
Joined: Apr 2002
Posts: 64
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From: Los Angeles or Spokane
streetmaster 390 info?
Well, when I bought my truck about 3 months back the person I bought it from gave me an intake manifold for a 4bbl carb. It is a 'streetmaster 390' single plane. Does anyone know anything about it? Should I put it on? I have a 73 F250 with the 360. It has the stock dual plane manifold and 2bbl carb. What kind of performance improvement would I get with this manifold and a 4bbl? Would my mileage go to hell?
Thanks!
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
streetmaster 390 info?
Phillip, Sell the intake and carb, leave yours alone. You would never see any kind of performance as to work required to install the darn thing. A well tuned 2 barrel can get better mpg. You are not turning your engine over 4000 rpms or shouldn't be, so the 2 barrel is putting in all the gas the engine can use. You can probably get $300.00 for that setup if you advertise it correctly. 
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John
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In the cool still quiet of night, you can hear chevies rusting away.
Elder User
Joined: Aug 2001
Posts: 962
Likes: 2
From: Collierville, TN
streetmaster 390 info?
Ditto. While a 4v intake and carb may under some circumstances add performance, it doesn't sound like you would benefit. Even if you would, that intake is absolutely the wrong choice. The Streetmaster is designed to produce power at high rpms. If you had it in a light car like a 'stang, with headers and ported heads, it might do you some good. The engine would be lame below 3000 rpm, but would peak up around 5000+. That is NOT what you want in a truck motor.
There's a reason the guy didn't have the Streetmaster installed on the truck. Sell it for a few hundred bucks and put the money to good use elsewhere (electronic ignition would be a good investment).
There's a reason the guy didn't have the Streetmaster installed on the truck. Sell it for a few hundred bucks and put the money to good use elsewhere (electronic ignition would be a good investment).
Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
streetmaster 390 info?
The Streetmaster is a turd of a manifold, that’s probably why the guy never put it on. It’s a small runner 4V single plane designed for lower rpm’s. We put one on my friend’s Fairlane GT back in the ‘70’s and it was a big mistake. The sucker runs out of breath above 4000! Also the throttle response is weak. It needs a lot of work to make it run good, here is what Edelbrock says about that:
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Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
streetmaster 390 info?
Hey no problem Sean, this torn and tattered sheet has been around the block a few times.
Don’t get me wrong, I know this manifold can work but not after a lot of elbow grease.
Barry
Don’t get me wrong, I know this manifold can work but not after a lot of elbow grease.
Barry
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