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Anyone done the TB4.2 Carby to EFI conversion?

Tech Talk for Nissan owners.

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RN
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Anyone done the TB4.2 Carby to EFI conversion?

Post by RN »

Won't clog up the forum so if anyone has done it would they consider me a PM as to what hassles you had, costs, overview.

Not really chasing ext HP but it is something that I would like to do as a project down the track.

cheers

RN
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Post by David_S »

I converted the P40 engine of my MQ to efi using a megasquirt ecu and a Falcon EA throttle body. There is a lot of general information on the Megasquirt site and the Megasquirt forum applicable to all conversions. I did a bit of a write-up of mine plus pictures on http://www.rmp-o.com/phpbb/viewtopic.php?t=967 (Page 2)

It has certainly transformed my old truck. It is not a difficult conversion but you have to be quite methodical especially with the wiring or you will soon lose track of where you are.

David
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RN
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Post by RN »

Excellent article you posted. Thanks.
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efi conversion

Post by choppedtrol »

i did the gq efi conversion and its simply the best thing i done. no stuffing round with dizzy's. straight swap. only hard thing is putting the efi wiring harness in. more fuel economical, lots more torqu, more power. cant complain.
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Post by Guy From Nowhere »

What was the average cost you guys were looking at with the do it yourself conversion?

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Post by WICKED »

yer mate did it, then a week later turbo'd it, week or 2 after that NOS'd it. Works well :twisted:
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RN
A speed camera would have prevented that!
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Post by RN »

WICKED wrote:yer mate did it, then a week later turbo'd it, week or 2 after that NOS'd it. Works well :twisted:
Pictures.

The Wiring harness. Can the EFI harness just be plugged into the main dash at a junction place where the original harness was. ie old harness out, in with the EFI.
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Post by rogantriton »

mate has just finished this converstion on his gq, he had to rip a good majority of the old harness out to connect the new one loooottttssssssss of wires
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Post by LOCKEE »

Just done it.

Bought an EFI GQ, swapped all the good bits off the old carby car and wrecked out all the other bits. Over 2K in front
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Post by wyliespatrol »

So how hard is the wiring harness swap?

How deep do you have to dig?

Is it all plug in or is there cutting and soldering to do?

Chris.
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