CM S3 HOM Trunkmount, loads of knock still - SRT Forums

tusamni · 05-13-2008, 05:58 PM

Well I finally got around to getting the trunkmount installed. I set the min at 1psi the max at around 7-8psi. Went out and started to mess around with it. I had my laptop with me and the Coolingmist software installed to watch the graphs.

It seemed like everything was working fine. The graphs showed the correct boost, so I have the vac lines hooked up correctly. The graphs also showed the system was spraying, so I assume it was working. Just to be sure I primed the system before I left and I heard the pump working and what sounded like fluid in the lines.

No matter what settings I put the Vari-cool to though I was still getting loads of knock, on average maybe 5KR to 8KR at max. I tried multiple DAB settings, DAB 1 = 19-20psi, DAB 2 = ~25psi.

Could this possibly be "phantom knock". The only thing I can think of might be the coldside pipe hitting the clutch slave cylinder (or whatever is behind the coldside pipe).

Before the Coolingmist I tried putting in a full tank of 100 octane, but with that it kicked me out in the top of third, bottom of fourth. Never tried it with any octane higher than that.

Any suggestions are appreciated.

moparmansrt4 · 05-13-2008, 07:39 PM

Yeah raise your max boost setting that sounds like your problem. Set it to whatever your highest spike is.

Coolingmist · 05-13-2008, 08:07 PM

What is your "tune" button set at?

tusamni · 05-13-2008, 08:15 PM

Have it set at 10.

tusamni · 05-13-2008, 08:16 PM

I could record some graphs and post them up tomorrow if that would help.

reed32 · 05-13-2008, 08:18 PM

Quote: Originally Posted by Coolingmist

What is your "tune" button set at?

what does the tune button do?

lyncoo · 05-13-2008, 08:20 PM

Quote: Originally Posted by reed32

what does the tune button do?

i guess it makes everything better

tusamni · 05-13-2008, 08:22 PM

Quote: Originally Posted by reed32

what does the tune button do?

Sets the flow %. So at 10 you are getting 100% flow, then if that is too much you can drop it down to cut the amount of methanol. At least that's what I remember from the manual.

tusamni · 05-14-2008, 07:32 AM

UPDATE: This morning HOM was holding all through third and the beginning of fourth (didn't want to take it past that). That was at DAB1 around 20-21psi. Then I decided to be brave and try 25psi, HOM didn't like that and kicked me out with 8KR.

Coolingmist · 05-14-2008, 07:59 AM

what concentration of meth are you running?

CM

tusamni · 05-14-2008, 08:08 AM

Honestly, I am not really sure. I did a full bottle of washer fluid and a bottle of heet to get it closer to 50/50. Would that be part of the problem? I was acutally pretty happy with HOM holding at DAB1, but it would be awesome if it could at 25psi.

Coolingmist · 05-14-2008, 09:50 AM

it could be. If you cant hold you should try a larger concentration, try 75% and see.

David

tusamni · 05-14-2008, 09:58 AM

Will do, i'll just pick up another bottle of heet I guess and throw it in there, see what happens. And just to say, the product does seem to work great so far, the install was easy and the software that comes with it is pretty nice as well.

cali · 05-14-2008, 12:38 PM

just spray 12gph you'll be ok

tusamni · 05-14-2008, 03:47 PM

Took the car out again this afternoon and it felt alot better. I'm not sure if it just took awhile to prime the system or something, but it's working great now. I'm going to give 25psi on HOM another go tonight and see what happens. There was a little fluid near the pump on top of the tank, i'll have to see where that is coming from.