Benifits Of Rewiring My New 040?

[RicsR33]

Hi guys/girls

Iam about to install a bosch 040 in my 33GTST and have read some places about upgrading the wiring, but looking at some tutorials they havent upgraded theres either. So what im wondering is what are the benifits of upgrading the wiring? or will the stock wiring work just as good? sorry if this has been covered hard to search when your internet has been capped lol got to page 8 of 31 and gave up.

Thanks guys

Richard

[Swiper the Fox]

Hi guys/girls

Iam about to install a bosch 040 in my 33GTST and have read some places about upgrading the wiring, but looking at some tutorials they havent upgraded theres either. So what im wondering is what are the benifits of upgrading the wiring? or will the stock wiring work just as good? sorry if this has been covered hard to search when your internet has been capped lol got to page 8 of 31 and gave up.

Thanks guys

Richard

Bosch pumps are designed to run at alternator voltage...i.e 13.5v. Even bypassing the fuel control modulator by providing a direct earth will not be sufficient as due to the increased current draw there is considerable heating of the wire and as a result a considerable voltage drop (ive seen as low as 10.4V) Use the factory fuel pump voltage feed to trigger a new relay switching a direct 6mm feed (use red wire) from the battery (15A fuse wired in at the battery). Earth the pump direct to the body with 4mm black wire and the pump will happily whizz away with its new voltage feed.

[Guilt-Toy]

what the dirty shirty said

[RicsR33]

Cheers for the reply. I understand now, thanks !

[R31Nismoid]

You could just read the FI Guide.

There is a fully detailed thread linked from there about wiring the fuel pump for full voltage...