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**Howerton Engineering** · 10-23-2011, 08:50 PM

(10-23-2011 08:47 PM)BostonR56S Wrote: What to check if my IATs are still spiking over 110F? This is live reference only, no data log capabilities, just scan gauge.

Jet location: by dipstick post fmic elbow on intake tube
Jet size .7mm
Mixture roughly 65/35 w/m
Thres 11:45-12:00
Gain 12:30
No flow restrictor. Everything else was default.

I don't want to be draining this stuff into my engine at a ridiculous rate when I'm not even tuned with it. But should I not expect any results from even these settings? I can't tell a difference from when it's on and off. It's been 55F today so pretty cold but I figured when wot I'd still see at least close to ambient iat, as others have. I'm slightly confused.

When I primed the system Jeff wrote if it pulses stop and restart the sys test jumper. I did this a few times, and was pondering the small quick pulsations I was seeing. I called Blake and he said if the flow sensor isn't going crazy and it's staying steady it is ok. After this I tested it under the windshield wiper with the thres all the way ccw. At this point I realized it wasn't spraying. Saw the low level fluid light on, so I filled it up halfway with distiller water. All went well. Plugged into intake tube and filled tank with meth. Could the low level trigger have done anything??

Thanks for any input.

You are running too much water, and your ambient is cold. Even 50/50 will never cool to ambient. 100% meth will get you down to 65F on a hot, dry day. The car will be a bit better in the hotter months with what you are doing, but not in the cold.

BostonR56S · 10-24-2011, 08:24 AM

65meth/35water is still too much water? I guess I gotta move out west where its not $10/gal lol!

Shouldn't the methanol cool the charge air based on a % of ambient rather than % methanol cooling to a *F?
Thats to say 100% methanol will cool to 65F whether it be 80*F or 115*F ambient?

If ambient is 55F, and IAT's rise to 110*F, shouldn't the methanol be able to cool the 110*F IAT? The 110 should then be resembled of what its "taking in from outside" no? Even though ambient is clearly still 65, the compressor and fmic are supplying 110F, and the meth never knows its 65F outside...? I could be completely off but logically thats how I think about it. To me the meth cools the air it sees, regardless of whats ambient. If its seeing 110F, it should be cooling the 110F air, not the ambient 65 air outside. I swear I saw people's data logs of 50/50 cooling the IATs?

Thanks for continuting to educate me, i'm still trying to learn!

**Howerton Engineering** · 10-24-2011, 08:41 AM

Sorry, you wrote 65/35 w/m in the first post. The ultimate temperature you can cool to is limited by the boiling points of methanol and water. A few general observations we have seen over the years:

Water is less effective at cooling in a humid environment. Methanol works better.

100% water will only cool to about 160F, regardless of ambient.

100% methanol will cool to about 65F in if spraying enough. This will depend on where you temp sensor is in the inlet track and many other variables.

If you have a good IC that is performing a good deal of cooling, there is less heat load available, and the water is a greater hindrance to forcing IAT's lower.

IAT's will be higher in the summer, so spraying the right amount of meth for cooling in summer may be too much in the winter when you IAT's are lower. More liquid methanol will get in the chamber and could cause misfires.

Water helps the in-chamber temp issues, but does not allow IAT's to cool as much as some would like to see.

Buli · (This post was last modified: 10-24-2011 10:54 AM by Buli.)

Thanks Jeff good info. I am still working on getting it all stright in my head.

(10-24-2011 08:41 AM)Howerton Engineering Wrote: IAT's will be higher in the summer, so spraying the right amount of meth for cooling in summer may be too much in the winter when you IAT's are lower. More liquid methanol will get in the chamber and could cause misfires.

I don't understand why meth in the winter could cause misfires in a R56. With the R56 dosen't the meth just replace the gas?

Has anyone gotten a tune for the meth? Is there more safe power to be had?

**Howerton Engineering** · 10-24-2011, 11:00 AM

In a 56, probably no misfires, but as a general rule it could happen.

BostonR56S · 10-24-2011, 11:13 AM

Jeff in this case what would you recommend for winter setup in the northeast? We see 45-65 deg right now and can b 0-40f in the winter. Should I just keep it off or maybe drop the gain and up water?

Also. So based on the circumstances you don't think there's anything wrong with the system and I shouldn't need to troubleshoot?

Buli · 10-25-2011, 02:04 PM

(10-24-2011 11:13 AM)BostonR56S Wrote: Jeff in this case what would you recommend for winter setup in the northeast? We see 45-65 deg right now and can b 0-40f in the winter. Should I just keep it off or maybe drop the gain and up water?

Also. So based on the circumstances you don't think there's anything wrong with the system and I shouldn't need to troubleshoot?

Let me try to answer. I will have similar temps here in KC, and will have ice tires on. Therefore I don't need as much HP. I will run 50/50 so it won't freeze. I will still get the cleaning effect of the water. I will turn the gain down to about 11 go to a 0.6 jet.

On your second question, if your only concern is the IAT then don't worry. If you are getting flow and have checked it per the checkout into a bottle so you know your flow then you are good to go in my opinion.

Now before you put on snow tires go try 100% meth and a 0.8 jet. Smile

Dave.0 · (This post was last modified: 10-25-2011 02:37 PM by Dave.0.)

It is 42 in the mornings here in the burbs of Philly and I run 100% meth and a 0.8 jet.
(255 hp / 200 tq RMW powered)

All I can say is my ride to work is a lot of fun but twisty roads and deer not so much fun.

My morning run to work is like Hellbender with 2 stop signs, solution to the deer........two big air horns. Big Grin

Carry on....

BostonR56S · (This post was last modified: 10-25-2011 02:41 PM by BostonR56S.)

Haha. I topped it off with meth yesterday and while iat is still reaching 100, I can see it climbs much slower than when it'd normally spike. Plus I'm noticing a lot more torque steer now, so higher octane is def noticeable.

I think for the winter I will run about a 75/25 meth/water mix, which is what I'll aim to run normally... And instead I'll turn the gain down so it comes on slower for octane boost and do more cooling up top when it really gets hot. Or is it the flow restrictor that helps it come on easily and the gain is more for how much comes on up top?

To be honest I wouldnt think twice running 100% if it was cheaper here.
But can't afford running over a gallon a week, as I drive 60 mi round trip a day and drive spiritedly lol

(10-25-2011 02:36 PM)PhillyDave Wrote: It is 42 in the mornings here in the burbs of Philly and I run 100% meth and a 0.8 jet.
(255 hp / 200 tq RMW powered)

All I can say is my ride to work is a lot of fun but twisty roads and deer not so much fun.

My morning run to work is like Hellbender with 2 stop signs, solution to the deer........two big air horns.

Carry on....

ThumperGP · 10-25-2011, 03:03 PM

(10-25-2011 02:39 PM)BostonR56S Wrote: I think for the winter I will run about a 75/25 meth/water mix, which is what I'll aim to run normally... And instead I'll turn the gain down so it comes on slower for octane boost and do more cooling up top when it really gets hot. Or is it the flow restrictor that helps it come on easily and the gain is more for how much comes on up top?

Turning the gain up (past 12 o clock) will give you more up top. It steepens the slope of the spray curve. Regardless of where it is set it will always start spraying at a 1:1 injector ratio and then either increase or decrease in ratio depending on where you have it set.

If I were you I'd just run a .6 jet and up the threshold to come on later.