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post #1 of (permalink) Old 01-20-2004, 10:57 AM Thread Starter
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Throttle body spacers?

I have a 1990 wt1500 with a five speed and 4.3l v6. Highway power, especially in 5th gear leases a lot to be desired. I'm thinking of installing a tbi spacer on. My question, is do they really work? Are they worth the money? Is any brand better than the others?

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post #2 of (permalink) Old 01-20-2004, 11:59 AM
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Re: Throttle body spacers?

This has been discussed a lot, try searching the board for a more detailed response. Most people agree that they don't do much of anything, but there are a few ppl around here that like theirs.
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post #3 of (permalink) Old 01-20-2004, 01:42 PM
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Re: Throttle body spacers?

I have one on my 88. I did notice some throttle response difference and perhaps a mileage increase. I just have the Jeg's one, didn't get the Poweraid vortex one, or whatever that one is. I think off-road magazine did a test of some of the popular bolt ons and dynoed them to see just how much of a gain you get. I think they got something like 8 hp out of the tb spacer, which may not justify the amount of money you spend depending on how much you spend on it. If I recall, a new exhaust got them about 22 hp on the dyno, although your truck may not do that because of the engine size and everything. For the extra power, I would look into a cam swap or a gear change, assuming that everything else is in good order. Something else that may work would be to just go for an engine swap. I think the general conscensus here(I think) would be swap for a 350. Should give more power and better mileage because the engine doesn't have to work so hard to move the weight of the truck. Just some thoughts.
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post #4 of (permalink) Old 01-20-2004, 03:11 PM
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Re: Throttle body spacers?

You might get a better power increase from a basic tune up if its been a while......
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post #5 of (permalink) Old 01-20-2004, 09:13 PM
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Re: Throttle body spacers?

I bought one off e-bay for my truck. It is aluminum with the swirls inside. It seems to give me better throttle off the line, and it makes a cool whistling noise. [img]images/graemlins/cool.gif[/img]
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post #6 of (permalink) Old 01-23-2004, 09:37 AM
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Re: Throttle body spacers?

Hello Folks,

If I remember correctly, I think the 4.3 TBI is the same 220 series TBI that is on my 5.7. I could be wrong, but
if so I would go with headers. Then if you hit the cam, I would go with 1.6 rockers if it uses 1.5 like my 5.7 for a also lil more lift.
Ok... I am exhausted. Off to bed, its way late for me... lol
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