454lx Mpi-502mpi
 

Might be switching from a 97 454 LX/MPI (330php-350 crankhp) to a 95 502 MPI,,,, Is this a direct swap, or will I need other parts?

Question how complete is the 502MPI?

Supposed to be a complete take out,,,, not sure on the flywheel and little things, I am pretty sure they are both gen 5 motors, thats why I was hoping it would be pretty cut and dry,,, but I know my luck !!!

Obnoxus,

It's going to be a fun summer watching you and Paul. :D The only bad thing is I’ll be watching from behind you guys this year. :(

Dan

Its a done deal,, I pick it up Sunday,,, The guy bought 572 superchiller blower motors for his 38 Cig !!!! I am actually more excited to see his boat then picking up my motor !!!

Oh,, and you behind us,,, yeah right !!!

UPDATE.....

Ok I bought the motor,,,,, The good news is he gave me a COMPLETE motor,,, all the way to the bellhousing so that is solved!!!!

My question now is fuel..... My exsisting motor is a cool fuel setup,,,, the 502 has a vapor seperator can I just drop it in, and all will be fine? Should/can I switch the 502 over to the cool fuel.

One last question,,, looking at the book the 95 ( mine ) 502 has a plug gap 0f .035,,,, 96 and newer has .040,,,,, why ?

the older one has an ignition coil/system Tbolt IV or V which produces not as much spark voltage/energy and so slightly smaller spark gap spec as the newer EFI

ursus,,, thanks ,,, is it worth upgrading to msd or is stock ok,, both years are rated at 415 hp,,,, does the 95 have a rev limiter?

Dennis,
Sounds like a good deal.
Now your Baja has been injected with a little Cig. Juice.:p

Should really wake it up.
Now you can get some real big air at this years poker run.

Mark

Thats the plan !!! more HP = more air !!!!!

Thanks Mark!!

Enough Air already!!:p :p

You should have bought both. I'm sure Paul will be in the market for one shortly.

Mr.Cig,
How is the water pressure on your boat? I'll be trying some interesting things this weekend.

Dan

paul already has a 502 !!!!! I did ok with my wimpy little 454,,, now it's time to show him my transom for a while !!!!!

I just need input of these different fuel systems, it has cool fuel now, the new motor has the vapor tank set up.

Dan, My water pressure was fine last year about 20 to 25 PSI but I'm switching to crossovers and not sure what will happen. I'm preparing for the worst because thats usually what happens.