Modifying for a 4.6

paul c · Post by **paul c** » Wed Mar 12, 2008 7:23 am

What mods would be needed to get a 4.6 running on a hotwire or a flapper system. I believe a rising rate fuel pressure reg is needed for flapper, what else would be needed. It is for a 110 auto for travelling, so wont be needed to rev, bottom end is more important.
I would prefer a system that is as much out of the box as possible so want to compare each system to decide which would be best for me. Thanks

ChrisJC · Post by **ChrisJC** » Wed Mar 12, 2008 8:24 am

My suggestion would be to fit a stock Hotwire system, and just swap the ECU for a mappable one.

The rising rate regulator is just a bodge and isn't necessary if the ECU is mappable.

Chris.

Post by **katanaman** » Wed Mar 12, 2008 8:33 am

paul c · Post by **paul c** » Wed Mar 12, 2008 8:37 am

so would a mappable ECU need playing with or can it be run out of the box?

ChrisJC · Post by **ChrisJC** » Wed Mar 12, 2008 9:54 am

If you could find somebody who'd already made a map, then it would run out of the box. Otherwise you'd have to map it.

Although I've never done it, if you buy a commercial ECU they ought to offer a mapping process with it (e.g. rolling road session)

Chris.

paul c · Post by **paul c** » Wed Mar 12, 2008 10:00 am

Thanks Chris. The problem is I am in the middle of nowhere and need something I can bolt on and go.

ChrisJC · Post by **ChrisJC** » Wed Mar 12, 2008 11:55 am

Have you tried any of the Landie forums?, I would think somebody has already done what you are planning....

Chris.

Wotland · Post by **Wotland** » Wed Mar 12, 2008 4:32 pm

ChrisJC wrote:Have you tried any of the Landie forums?, I would think somebody has already done what you are planning....

Chris.

May be if you post on forum like http://www.aulro.com/ someone can help you.

paul c · Post by **paul c** » Wed Mar 12, 2008 6:19 pm

Thanks Guys, I use ORRP and Outer Limits mostly, I know it has been done but it is hard to find someone who has done it who will talk about it. I have heard that drilling the flap in the flapper can fool the ecu, but it seems like an urban myth, everyone has heard about it but no-one knows more than that. I think it will be a matter of experimenting with the flapper and if it doesnt work well then going back to carbs. Cheers

Post by **katanaman** » Wed Mar 12, 2008 7:31 pm

If you really don't want to or cant go mappable ECU then IMHO you would be far better off using a holey or Webber carb than trying to bodge a flapper system to a 4.6. You will be much much happier with the results. The injectors alone could cause problems on a 4.6 and they aren't the same fit as 90 odd % of the injectors on the market and might well prove too small.

CastleMGBV8 · Post by **CastleMGBV8** » Wed Mar 12, 2008 8:05 pm

Paul,

You could have a word with VEMS as they have a NZ branch.

http://www.vems.co.nz/

Kevin.