V2Rocket

Could an '83 4.7 motor be updated with the LH-Jetronic system that gave the '87 cars the extra 50 HP?

TIA

Lizard928

imo not worth it, convert to megasquirt or standalone efi, you loose the distributor caps/rotors, and the MAF

Mongo

Yes and No.

Yes because the 1985 and 1986 Euro cars used Bosch LH Jetronic, and if you could find one of those complete systems, you can install it on the car and make a custom chip to tune the a/f ratios based upon the engine and US specifications.

No because it's not a direct swap.

Lizard928

as well it isnt just the EFI that gives it the 50+ ponies.

hacker-pschorr

compression
exhaust
intake
heads
cams
# of valves
displacement.......

Did I forget anything?

Mongo

Timing.

mj1pate

and expense....
My ignition ecu seems to have just gone south (more testing in order). replacement with decent rebuilt is around $800 clams, not including the FI ecu (~$1200). How's your budget?

Mike

PorKen

The EZF/LH2.2 are, AFAIK, pretty rugged. So used ones are a good option, IMHO (EG $150 at 928Intl).

Have you checked out the ignition amps up by the bumper?

Jim bailey - 928 International

Correct the ignition units very rarely fail so we have MANY of them.

mj1pate

Good to know Jim....That would help my sour face as well (no spark). Hopefully I have a hard failure and can isolate this.

Mike

IcemanG17

I don't think it would be worth it....for at best a minimal gain...for all that trouble might as well get a S4+ engine with brains and do the swap the right way! Then you get the S4+ 316HP vs the 234 you have now!