Engine SwapEverything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.
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Can anyone tell me if they are actually different? I have an 86 305 and I am dropping an 86 350 TPI in its place. Are they different? Does anyone know the part number for the 2?
thanks
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Jamie James
1986 Iroc-Z 305 TPI
1.90 60 ft 14.15@ 95.75
1.74 60 ft 12.84@107.75 on the bottle.
My IROC:
http://personal.nbnet.nb.ca/jjames/homepage.htm
I Changed from a 305 to 350 in my 91RS and was wondering the same thing. Nobody could give me the part numbers so I left the 305 knock sensor in. Im am not sure if it is causing any problems to the engine, but I am having tempreture problems. Not really sure if this has anything to do with the knock sensor though. I am thinking about changing it but I dont know which one to put in .
I cross referenced the numbers and they seem to come up with the same numbers both at the GM dealer and at the local parts stores. So who knows? I would like to know if anybody knows for sure.
What size thermostat are you running? The knock sensor wouldn't/shouldn't have anything to do with heating problems.
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Jamie James
1986 Iroc-Z 305 TPI
1.90 60 ft 14.15@ 95.75
1.74 60 ft 12.84@107.75 on the bottle.
My IROC:
http://personal.nbnet.nb.ca/jjames/homepage.htm
Yes the knock sensors are different. Apparently they send a different signal to the computer. there have been some posts on this so you can learn more by checking the archives. the 350 knock sensor that I used is part # 10456288. Comes out of a 89 350 cop car but is the same as many other 350 applications. I understand that the ESC module should be changed too. Prt number 16128261. Good luck..........bob
<font face="Verdana, Arial" size="2">Originally posted by gwman: I Changed from a 305 to 350 in my 91RS and was wondering the same thing. Nobody could give me the part numbers so I left the 305 knock sensor in. Im am not sure if it is causing any problems to the engine, but I am having tempreture problems. Not really sure if this has anything to do with the knock sensor though. I am thinking about changing it but I dont know which one to put in .</font>
check your airdam under the car and the fans (2), and of course the tstat, oh and if that doesnt work becool sells an aluminum radiator for it, 700 bucks or so though, but itll keep ya cool
Due to time constraints I did not change the knock sensor or the harmonic balancer and everything seems to be running fine with 1000 kms on the engine so far.
------------------
Jamie James
1986 Iroc-Z 305 TPI
1.90 60 ft 14.15@ 95.75
1.74 60 ft 12.84@107.75 on the bottle.
My IROC:
http://personal.nbnet.nb.ca/jjames/homepage.htm
. 
