Throttle body spacers
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New User
Joined: Mar 2003
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From: Illinois
Throttle body spacers
Hey everyone, do the 1 inch throttle body spacers do any thing? They claim more horsepower and some mileage gains.Don't want to throw money away.I want to put one on an 1989 F250 with a 351 .
Thanks
Thanks
Post Fiend
Joined: May 2006
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From: Central Florida
I have to agree, I was not happy with mine either. It made the intake whistle, I measured about 0.3 mpg decline and no extra power. If your running a stock intake, then perhaps they work, but I wouldn't do it with a cold air kit.
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Joined: Oct 2005
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I had a very good experience with a throttle body spacer. I placed one on a 97 Yukon and gained about 1-1.5 mpg. When I put a FIPK from K & N on it, I lost!!! The throttle body spacer was the only bolt on that actually performed. I used the helix spiral type.
Post Fiend
Joined: May 2006
Posts: 10,007
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From: Central Florida
Well your mixing two concepts. The screw type air directors (poweraid, s&t, tornado, ect.) put a spin on the air to make it more turbulent so fuel mixes better. The cold air kits are supposed to push air in at greater velocities, so when you add an air director your countering the effect the cold air intake is trying to achieve.
Moderator
Joined: Dec 2001
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From: Louisville,Ky.
The swirl type work fine if you have a carb or TBI. There is no fuel to mix in the air until it enters the intake port on the port injected vehicle.
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Post Fiend
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They show improvement on some applications, like the jeep inline motors, also seem to be a benifit on the new mustang gt's with the 3V 4.6. Did nothing on my 4.0 in my ranger, but did notice a difference on my jeep 2.5. AEM sends a tb spacer along with thier cai if there is a benifit. If you get thier cai and it doesn't have a spacer, then there was no benifit on the ole dyno.
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Logistics Pro
Joined: Dec 2004
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From: Carson City, NV
i used a tb spacer along with my cold air intake and did notice a difference. after those two mods i had some under drive pulleys thrown on and after that the truck would get between 20-22 mpg on the highway going 65-70. they make one hell of a whisteling sound.
Junior User
Joined: Feb 2006
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From: Ontario
It depends on the application, had a spacer on my 89 4.3 gm motor and worked great, installed one on my 97 when I bought it and noticed nothing. I think you'll notice a little power power and milage gains with your 89 as it is a wet intake system, as opposed to the newer dry intake systems.
Posting Guru
Joined: Nov 2004
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From: sunny fla sometimes windy
Lengthing the intake increases the torque of the motor to some extent. If it is like a phenolic spacer and made of plastic or some type of heat resisting material, That gains could be more, mostly from keeping the intake cooler. Pair up a phenolic spacer on the upper to lower intakes and a TB spacer and add some torque, of course if you have 3" exhaust or duals it won't be noticeable. If you keep a longer thinner stock exhaust tubing and add the spacers you will feel a difference.
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Joined: Nov 2007
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Same here, I ran my truck for about 3 weeks with just the spacer and noticed about a 1 MPG gain. I then installed a air-intake system and noticed a 3 MPG gain. Dosen't sound like much but, after time it'll add up.
Bob07fx2
Bob07fx2
Originally Posted by bareaneye
I had a very good experience with a throttle body spacer. I placed one on a 97 Yukon and gained about 1-1.5 mpg. When I put a FIPK from K & N on it, I lost!!! The throttle body spacer was the only bolt on that actually performed. I used the helix spiral type.
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New User
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From: Illinois
Originally Posted by blue beast
Lengthing the intake increases the torque of the motor to some extent. If it is like a phenolic spacer and made of plastic or some type of heat resisting material, That gains could be more, mostly from keeping the intake cooler. Pair up a phenolic spacer on the upper to lower intakes and a TB spacer and add some torque, of course if you have 3" exhaust or duals it won't be noticeable. If you keep a longer thinner stock exhaust tubing and add the spacers you will feel a difference.
New User
Joined: Nov 2007
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Originally Posted by race21j
Where do you buy the spacers for the Ford intakes? My parts store looked at me like I had a spare head.