engine management - decision to make

Seight-V8 · Post by **Seight-V8** » Sun May 24, 2009 7:11 pm

hiya all,

Last major decision to make is now which engine management to use to run the 4.6 engine i've been building for my westfield.

orginally i decided on running the orginal GEMS efi, with some major mods to plenum, flywheel and ecu.

I know the cost in chipping is high, but the cost is less than DTA or ermerald ecu.

Got only one question to have answered first before i look elsewhere.

what would be the downsides of the gems system in a westfield?..

thinking about will it re-act quick enough, and could i use all the engine mods i've made.

thinking aftermarket would be better option to run without airflow meter.

Left this till last, as always knew it wasnt a easy decision.

cheers

scott

ChrisJC · Post by **ChrisJC** » Sun May 24, 2009 8:05 pm

If the engine is close to standard, then I would go for GEMs. Land Rover spent far more time getting it to work properly than any aftermarket ECU will have done.

Chris.

stevieturbo · Post by **stevieturbo** » Mon May 25, 2009 12:38 am

Use whatever can be setup to run any chosen engine the easiest, and best value.

bobtail84 · Post by **bobtail84** » Thu Jun 04, 2009 10:13 pm

Can I suggest Mega Squirt. Cheaper than Omex or DTA and if your not a full blown race team it does all that you need and more inc nos and water injection plus a lot more. Just so you know, have Mega Squirt on my 3.9 and am just finishing helping a mate tune his 3.9. It's a lot more fun to have done the work your self than paying big wedges of cash to have someone do what you could do with a lap top.

HTH Jeff

r2d2hp · Post by **r2d2hp** » Fri Jun 05, 2009 10:19 am

Just my opinion but when we have spent thousands of pounds on our engines and associated parts why skimp on the paying an expert to set it up properly - get it wrong and its going to cost a lot more than a few hundered pounds to have had it done right in the first place.

I tinker with mine to get it drivable and then have it setup on the rollers and difference is amazing

Eliot · Post by **Eliot** » Fri Jun 05, 2009 10:42 am

r2d2hp wrote:Just my opinion but when we have spent thousands of pounds on our engines and associated parts why skimp on the paying an expert to set it up properly - get it wrong and its going to cost a lot more than a few hundered pounds to have had it done right in the first place.

I tinker with mine to get it drivable and then have it setup on the rollers and difference is amazing

Depends on your level of confidence, but its not actually very difficult to do yourself assuming you have a wideband and a mate to drive or tune with the laptop. For fast cars tuning on the road is dodgy (I helped my mate in his Griff 500 and were pulling 140+MPH doing the top end area) - so dyno time is a good choice, but I would still want to tune it myself and get the dyno operator to drive the car for me.