top end question?

[montess408]

i know this question has been asked alot but i gotta ask i am building a 3.1 for my 88 z24 and i was thinking on getting my gen2 heads and intake worked on but i read that gen3 top end is better for performance so what do i need to do to get my gen3 compateble ?????

[FastGT31]

if you want to swap to a gen3 topend (highly recommended) you will need the heads, intake manifiolds, throttle body, basically everything on top of a newer motor. you will also need to swap power steering pumps because the gen2 pumps resevoir doesnt clear the lower gen3 manifold. the entire write up on this can be found at domesticcrew.com. its very informative. one other thing, many people here, including myself have swapped to a 3500 upper intake manifold because it yields more power throughout the rpm range than a 3400 upper intake manifold. i think they look better too but thats my opinion.

[Syn]

domesticcrew.com

[montess408]

well that sounds pretty easy but what about the wiring are all the sensors the same ? do i keep the ecu from the3.1 ?

[FastGT31]

the only sensor that must be wired in is the 3 wire coolant temp sensor. a 3.1 has two sensors but a 3x00 only has one. and yes you should use your current ecu.

[torq455]

didn't the knock sensor have to be changed too?

[Syn]

yeah some people did have issues with the knock sensor

[bszopi]

The knock sensor needs to match the computer being used. If the stock ECM is maintained, then the stock KS will work.

[montess408]

thanks for the info guys that was helpful
but how do you rewire the 3 wire sensor to the 2 wire set up ??

[montess408]

thanks for the info guys that was helpful
but how do you rewire the 3 wire sensor to the 2 wire set up ??

[Syn]

the green temp wire that goes to the back of the rear cyclinder head gets cut and spliced into the 3 wire cts used byt the newer 3x00 engine

as the 3.1 used a 2 wire cts the 3rd wire comes from the back of the head-the newer 3x00 engines don't use 2 cts's like the 3.1's

clear things up now?