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post #1 of (permalink) Old 02-07-2002, 09:06 PM
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whats TPI?

TBI is throttle body injection, whats tpi? and whats the difference, and which one is better in what?
thanks


Started with a 1500, got slapped around, got me a truck with a D60, 14ff, np205, currently under construction.
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post #2 of (permalink) Old 02-07-2002, 09:11 PM
 
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Re: whats TPI?

Tuned Port Injection. I don't know about other questions though. ^ Old hand
Edit* Darn, not yet, whens old hand coming.
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post #3 of (permalink) Old 02-07-2002, 09:16 PM
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Re: whats TPI?

They used it in 'vettes, camaros, etc beginning in the mid 80's.

Here's a link http://www.fuelinjection.com/portinj.html

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post #4 of (permalink) Old 02-07-2002, 09:26 PM
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Re: whats TPI?

you people are irreplacable, jax thats exactly what i needed.


Started with a 1500, got slapped around, got me a truck with a D60, 14ff, np205, currently under construction.
post #5 of (permalink) Old 02-07-2002, 10:01 PM
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Re: whats TPI?

TPI is waaaayyy better than trottle body. Throttle body just is an electronic carborator. TPI has a single injector for every cylinder and it is mounted over the cumbustion chamber. TPI also gets better gas mileage.
BUT it cost ALOT more.

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post #6 of (permalink) Old 02-07-2002, 10:33 PM
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Re: whats TPI?

No problem man,
I just did a Google search on "Tuned port injection" and that was like the 3rd site in the list.


BTW, are you looking at putting a TPI motor in your truck? I thought you were selling it for something easier on gas?
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post #7 of (permalink) Old 02-07-2002, 11:03 PM
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Re: whats TPI?

I'm new to this fuel stuff too. What about sequential multi-port fuel injection (SFI). That's what I have. Puts the gas right into the intake port, I know...and that's all I know. Good? Bad? Better than TPI, or too close to call?



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post #8 of (permalink) Old 02-07-2002, 11:09 PM
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Re: whats TPI?

Really it is exactly the same as TPI.

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post #9 of (permalink) Old 02-07-2002, 11:11 PM
 
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Re: whats TPI?

Umm, no it's not. Tuned port injection is just what it says "TUNED" port. Meaning that all the intake runners are tuned exactly alike and to flow the exact same amount of air making it much more efficient. The injectors are in the same location yes. I'm putting a Street & Performance 1800 CFM TPI unit on the wills engine if anyone cares[img]/wwwthreads_images/icons/wink.gif[/img].

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post #10 of (permalink) Old 02-07-2002, 11:18 PM
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Re: whats TPI?

<blockquote><font size=1>In reply to:</font><hr>

Really it is exactly the same as TPI.

<hr></blockquote>

Elk_Muncher, watch out for this kid (just a heads up for the new guy)

They are not exactly the same. Take a look at the link above, it will tell you a lot about the history of TPI.
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