Pontiac Firebird 1967-2002 Birds of a feather flock together

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Old Nov 19, 2005 | 11:22 AM
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alright...

still havnt goten a chance to find out EXACTLY what i have

but i have an 89 firebird with a 305

according to a car club place i've been reading it should be TPI right?

well i KNOW it has a TB b/c i've looked at that already

whats the main differences between TPI and TBI

and whats the difference between my intake system b/c of that


sorry for the ignorance... if it were up to me id have a 350 with 4 bolt main 4" highrise intake with a quadjrajet :-p
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Old Nov 19, 2005 | 12:53 PM
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TPI engines have very noticeable intake runners, as the TBI engines dont.. Post a pic, and anyone could tell you this in a second. TPI engines are better Stock vs Stock, as they do have better throttle response, and a little more HP. (not sure on specifics here), but i've owned a couple TPI Iroc Camaros. (85,87) They are fun to drive, I love the late 80s body styles!
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Old Nov 19, 2005 | 01:11 PM
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Check out www.thirdgen.org for some more info but, if you posted a picture we could tell you pretty easily. Here is a pic of a TPI intake (actually off a 350 but they look the same) TPI intake
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Old Nov 20, 2005 | 01:30 PM
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TPI intake came on engines w/ VIN code F and 8, (check the 8th digit of the VIN). V6 was code S and I believe the 305 TBI was code E.
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Old Nov 20, 2005 | 02:16 PM
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hmm

thanks guys..

FBDYLVR... your info was ALOT of help

i have TBI... my 8th code is an E....

and defiantely...there are NOT any runners...
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Old Nov 22, 2005 | 09:10 PM
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For lack of a better description... TBI basically looks like a carb with two injectors shoved into it. I've got a '91 with the L03 and a T5. I don't exactly see why the car club place says your car should be TPI...
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