Designed a safety circuit for the W/M . If i can get that working , will be able to lean out and advance the timing some more .

Anyone know if our oil pressure sender would be OK to use with water ?

 

I'm sure it will work. It might rust long term. I think it is just a 5 PSI switch. That sounds really low to me. I would want something that is close to the operating pressure of the w/m system.

 

If it's 5 psi it's too low . Have been looking for something appropriate on the net but not really come up with anything yet .

 

AEM water/meth failsafe :P

But on another note, don't go crazy with the leaning out and water/meth. It's not race fuel.

thewird

 

I'm with this guy...

 

Was not planning anything radical - taking it to just below the point I have seen a detonation without the W/M .

 

So yeah ..................

Had a slight ping when overtaking the other day . Warm day , 4 people in the car , 3rd gear around 6000rpm .

Enriched it a little , tweaked the W/M up a little . Hopefully it will be ok now ............



Thank goodness for my aftermarket apex s



In other news .............. I think i may have stumbled across renesis turbo fuel economy nirvana ............... more to come !

 

doo tellllll!!!

 

I will .... when i can confirm it 100%

 

And this is the reason you don't tune for max power by leaning it out. You need to leave a safety margin for increased load. A steep hill would act the same way. But yah, aftermarket seals are awesome.

thewird

 

I guess you don't know where the limits are till you go there

 

still waiting on MPG conversation.

 

just poking around for some updates.

 

:

 

LOL . Hate to be a disappointment .

Have not been driving the 8 much at all lately and the dyno didn't happen . Maybe sometime in January .

Re the fuel economy ..... getting up to 30 miles extra (maybe 10%) on a tank . Not sure I understand why but it does correspond with a modification i did .
Not worth discussing till I can confirm it's consistent. Should be doing lots of miles over xmas so will have a better idea next month.

 

Hooked it up and the pressure of the water (200psi) doesn't trigger the switch . Pressure should just ground out the terminal to the body of the switch ................. right ?


I have decided that all I want as far as a safety goes is for a light to come on telling me when there is water pressure .I find it rather worrisome to be at full boost and not know if the W/M is working or not.

 

Crap brett, I don't remember what it looks like. Is it a single wire switch? Did you ohm it to see if it is normally open or normally closed? If it is single wire then it will ground out to the body.


This is a pure guess, but I think the oil pressure switch will not conduct electricity when it has pressure. Then when the pressure falls it will turn the light on.

 

As a side note I've got a couple of these on the way to me. They are 1/8 BSPP pipe thread, but I think I should be able to run a die on them and they will work fine with 1/8" NPT. At 12 dollars for an adjustable pressure switch it's not bad at all.

1pcs 1 8" Port Adjustable Diaphragm Type Pressure Controller Switch | eBay

 

Looks good , thanks for the link .
Just ordered one

 

yeah - single wire . Put ohmeter over the terminal and switch body .... No continuity either way (with or without pressure) .

 

That should have worked. How much pressure? The only thing I can guess is it might be bad.

I got the normally open switch in today. Still waiting on the normally closed one. It screwed right into 1/8NPT and looks like it's good. I'll have to do a little testing with it.

 

200psi . It must be bad ... even though it came off a near new engine .


The voltage is wrong the max pressure is too low and it says it's for air ... other than that it should be hunky dory LOL

 

lol, yeah yeah

The voltage doesn't matter. It will work on 12 volts or less. The Wattage it can handle will be a little different, but it doesn't take much to run a light. As long as it is sealed and doesn't leak the fluid should not matter either.

As for the pressure. It might go higher. I'm using this one for fuel pressure cut. So I'll be setting it at 50PSI.

 

Seeing as I've already let the cat out of the bag to a few people .....


Open SSV at 4000 (boosted engines only ! )

Pros :
Smoother transition of SSV
Better mpg (Still not conclusive but results so far are promising)
Slightly more power between 3200 and 4000 (under boost SSV would normally open at 3200)

Cons : extremely difficult to tune out the spikes and troughs - especially when using non standard injectors in Sec. position. but - doable

Why better MPG ? some thoughts .............

Fewer secondary injector transitions
possibly reduced pumping losses (at cruiseing loads) in the 3500-4000rpm range

 

Interesting, thanks for sharing Brett