In my garage I have a 305 TPI with an automatic that supposedly came out of a Firebird that got rear-ended and it only has 40,000 miles on it, again, supposedly. I want to know which year range it is in. Whether it is the 80's or the 90's version. It has the alternator and air pump on the passenger side of the motor and the A/c compressor on the dirver side of the engine. On the passenger side of the throttle body there is a sensor that looks like Throttle Position sensor and then there is some type of sensor mounted underneath the throttle body as well and the plate on top of the throttle body read "Tuned Port Injection". Any help is great because I want to know what performance parts I need to look for because I plan on building it up as torquey as possible and sticking it in my Jag along with a T-5. Thanks In Advance Everyone.

 

Alternator and air pump on the pass. side and ac compressor on driver side will be an 87 or earlier tpi. Is there a serpentine belt along with v-belts? 88 and up tpi's use a single serpentine belt.

 

most tpi's are the same, but the earlier tpi had a huge thing under the plenum, its a jiant rusty p.o.s. if thats there, its like 89 or earlier or 88 or earlier, i forgot wich one

 

Can't you tell if it's an early model by the 9th injector?

 

MAF sensor and its 89 and older, MAP sensor and its 90 and newer

the fact that is say's "Tuned Port Injection" on the TB then I'd say its 88 or older, all the 88 and older I have owned had the "Tuned Port Injection" and all the 89 and newer I'v had didnt say anything, but I live in Canada so maybe thats just here

 

http://www.hotrodlane.cc/PDFFILES/TPIStory.pdf dont throw a bunch of oney into a 305 unless your on a mission to make a badass 305, or if you do, make sure your money is invested in parts that are interchangable with a 350,, not hard to do since thats almost every bolt on.