MCX pumpfuel upgrade.

[WFO or go home]

MCX pump fuel upgrade.

Anybody do the upgrade to allow you to run full boost on pump fuel?

How well does it work?

Thoughts?

Thanks

 

[TBird]

Works really good, the sled really wakens up .
First i added the external pump, after a while i installed nytro style fuel pickup to remove the stock pump, it feels better to get rid of that!
Haven't missed a beat on 3000km / 1900miles.

 

[WFO or go home]

Are you running 17 psi?

I figured I would run 15 to be on the safe side and add a couple gallons of race fuel from time to time @ 17 psi.

I already have the external pump so the upgrade is pretty cheap.

 

[PistonBroke]

hmmmm

Are we talking about the 290 kit? There's a thread just a few down on this page has some good info going in it.

 

[Tuesday]

Are we talking about the 290 kit? There's a thread just a few down on this page has some good info going in it.

They are talking nytro not apex.

I would also like to hear some feedback at running 17. I ran 15 last year and always had 2-3 gallons of AV fuel in the tank just to make sure there was no detonation. I also have the early kit with the external fuel pump and regulator so the upgrade would be easy.

Tues.

 

[PistonBroke]

They are talking nytro not apex.

oops! sorry gents.

 

[TBird]

No, i run 16 psi, higher then that and i add AV just like Tuesday!
I believe it's designed for 16 psi, atleast @ sealevel, 17 sounds high!

 

[drinkwyo]

I ran 17 lbs last year with mine on just pump at 7000+ ft.

 

[WFO or go home]

Nice to hear a few people put a season on it trouble free.

 

[SAWYER]

WFO. Why not just a $100 boost controll? I ran mine on 15 for the better part of the season with 20% 110.

 

[WFO or go home]

Already have boost controller. That won't let you run 15-17 psi on pump.

I ran race fuel in everything for 10 years but I am done with it. If I can safely run 15 on pump, I'm in.

 

[Washy]

I have ran 16-17 psi on pump gas for 2 seasons now at 6000-7000 feet.
On a side note. I dissconnected the MCX automatic boost controller and run a hallman instead. AFR at 12 all day long at WOT. If you retard your ignition timing on the top end by 4-6 degrees you will have to add 6-8 fuel to get 12:1 AF ratio = MORE HP

 

[Thistledoo]

so can I run 15ish with the MXC electonic boost control? Or do I have to by pass it? I dont have the external fuel pump.

 

[Washy]

so can I run 15ish with the MXC electonic boost control? Or do I have to by pass it? I dont have the external fuel pump.

I think the kits without the upgrade kit were only mapped by MCX to 14.5 PSI max. Dont quote me on it though. You will run out of fuel after 14 psi without the external fuel pump.

 

[Washy]

If you have the upgrade kit here is what I got from Erik a while back:

Hi Colyn.
It seems you already got the upgrade kit.
We sent out the very first kits with fuel pump.
We run 210 kPa total pressure on pump gas. This is 110 kPa(15.7psi) turbo pressure at sea level and about 133 kpa turbo pressure at 2300 meter, (this is about 19 PSI boost at 7500 feet in US units).
I shall test 230 kpa total pressure on pumpgas in the beginnig of January.
We have not tested the Powercommander with timing control yet on the Nytro, sorry.
Best Regards Erik Marklund


Now if you upgrade to the 19T bigger turbo, you would have to get the external fuel pump and regulator(if you dont have it) the bigger 19 T turbo and the remap for you MCX control box. 10% increase in HP I am told.

 

[TBird]

so can I run 15ish with the MXC electonic boost control? Or do I have to by pass it? I dont have the external fuel pump.

The amount of boost you can run have nothing to do with MCX electronic boostcontroller per say, you can either rise boost with wg actuator, if the spring is to soft you need to put in a stiffer one, or you can reprogram the MCX boostcontroller to a higher boostmap, but you can do neither without the external fuelpump, so it's a big NO to rise boost >15psi without external fuelpump!

 

[WFO or go home]

If you don't have the external pump you will have to buy it as part of the upgrade.

Unfotunately my AFR guage is junk. What works?

 

[Washy]

My AEM works good. The one thing that always kills sensors is moisture. When you start your sled and all that water is coming out the tail pipe, it is killing your sensors. I had to run a switch to mine so once the sled is warmed up I turn the wideband on and it has not killed a sensor in 2500 KMS.

I bunt out 3 sensors in a matter of a month before I put the switch in. I am not running race gas at all. Just premium.

 

[TBird]

My AEM works good. The one thing that always kills sensors is moisture. When you start your sled and all that water is coming out the tail pipe, it is killing your sensors. I had to run a switch to mine so once the sled is warmed up I turn the wideband on and it has not killed a sensor in 2500 KMS.

I bunt out 3 sensors in a matter of a month before I put the switch in.

Wow, glad to hear a new "trick", i will try that!

 

[WFO or go home]

I will look in to that also. Mine hasn't worked since the day i bought it.