5EK Rebuild

cat might not make it a 550 but it can be a 550 with the right ser# for liner kits might need a cam i think some of the early cat had a diff cam but im sure some body will let you know what ya need

 

I think they meant if a guy was to just go and flash your ECM that he'd cook his motor. If you rebuild the motor using the 550 parts and then have the ECM flashed I don't think you'd have any problem.

 

Pm me the correct serial number and I will check it out for you.

 

Use 58 inj. 800 hp cam and right cylinder packs and you got a good motor. I have built 3 great motors 7.0mpg driven right. I will find the right part number for cam. I am sure someone knows the full part number of the injectors.

 

Ive got dang near same motor as u, 1995 5ek 25xxx heres what mine has done to it,
600 hp cam
pdi turbo
port and polished manifold
injectors at 5232
600hp 5ds ecm file
fuel temp wire
straight piped
swapped out stock cat fuel water sep filter head for an aftermarket one that flows 150gph only pullin 3 of vac, this was one of the best things i did, plus got rid of all 90 elbows on suction side of fuel pump
upped fuel pressure 10#

My motor runs pretty cool, egts never over 700 on a hard pull, water temp runs cool, i have no issues at all, ive never had it dynoed so not really sure where its at, it pulls like a train and gets in the mid 6's for mpg pullin a rack. I would think mine is all of 600hp or more and it runs great

Just curious what issues or symptoms ur having that u feel u gotta rebuild it?

 

Yep started at 435, i was told our blocks can handle up to 700ish hp without issues, i think makin sure the motor has enough air flow for the fuel helps alot keeping all temps down.

My bud has a 6nz with a hot ecm file but he wont spend money on aftermarket turbo and runs a crappy stock cat turbo, his egts are 900-1200 which imo is really dumb

When the head gasket went any damage happen?