OK, I read some more older CM HOM kit threads and tried some new stuff on my lunch break. Under the "SET" menu in the software, it was on boost only. I switched it to SRT HOM mode. It didn't make any difference, still knocking when in HOM.
Then, since I had my laptop out, I decided to prime the system first, then try a pull. I primed for about 8 seconds at 100%. Then put it in DAB 2 @ 25psi, held through third with only 1 count of knock. If I don't prime it, it's straight to 8KR. So it seems like the system isn't keeping fluid in the lines. By the time it does start injecting, I have so much knock HOM kicks me out.
OK, I read some more older CM HOM kit threads and tried some new stuff on my lunch break. Under the "SET" menu in the software, it was on boost only. I switched it to SRT HOM mode. It didn't make any difference, still knocking when in HOM.
Then, since I had my laptop out, I decided to prime the system first, then try a pull. I primed for about 8 seconds at 100%. Then put it in DAB 2 @ 25psi, held through third with only 1 count of knock. If I don't prime it, it's straight to 8KR. So it seems like the system isn't keeping fluid in the lines. By the time it does start injecting, I have so much knock HOM kicks me out.
So no check valve between pump & dist block? There needs to be a check valve as close to the nozzles as you can. With the checkvalve it will hold the pressure in the line from the pump & only has to "prime" a short amount of line to the nozzles.
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So no check valve between pump & dist block? There needs to be a check valve as close to the nozzles as you can. With the checkvalve it will hold the pressure in the line from the pump & only has to "prime" a short amount of line to the nozzles.
Good catch, as far I can remember there isn't a CV in there. Would it be OK to put one before the distribution block, or should I get two, one on each of the lines to the nozzles? Thanks, sounds like that should fix my problem BTW, I saw the video of your car, it was awesome.
This is the same thing I found in the mitsu. One nozzle becomes a vent. the other a drain. More so in the mitsu because the distrabution block was mounted on the pump. Principal is the same. Cure is the same too. You do only need one check valve. It's just where you put it and where your nozzles are located that makes the differance.
Got pics?
Quote: Originally Posted by tusamni
So it seems like the system isn't keeping fluid in the lines. By the time it does start injecting, I have so much knock HOM kicks me out.
This is the same thing I found in the mitsu. One nozzle becomes a vent. the other a drain. More so in the mitsu because the distrabution block was mounted on the pump. Principal is the same. Cure is the same too. You do only need one check valve. It's just where you put it and where your nozzles are located that makes the differance.
Got pics?
I'll get some pics for you tomorrow morning, too dark out now. I have the tank and pump in the trunk, lines up the underbody, then it comes up to the battery, the distribution block sits next to the battery. Then the two lines break off, on to the cold side pipe, the other in the top of the intercooler tank (it's an MPx intercooler). I'm not sure if that was the best location, but I had heard of people doing one in the intercooler, one in the cold side, so that's what I did.
The mitsu was a side mount intercooler. one nozzle on the exit flange and one nozzle on pipe just before the throttle body. If you are familiar with a turbo eclipse than you know how far apart these are.
The tank and pump was in the trunk. Check valve mounted to the pump. Three way plastic fitting (distrabution manifold) mounted to the check valve.
Park the car on a steep hill with the nose upward and the fluid might stay in the lines. Any other position or just driving, and the throttle body nozzle was a vent and all the fluid in those two lines would drain into the intercooler piping out the lower nozzle. No. Nothing was coming from the tank. Only the lines.
We got rid of one line and the manifold. Put a tee in at the lower nozzle. Actually The tee ended up being the nozzle holder. Ran a line from that tee to the upper nozzle. Installed a NC magnetic valve (solinoid valve). Before the upper nozzle. Installed a hobbs switch I got at napa and set it to open at 10psi intake pressure. Moved the check valve from the pump to just before the tee.
This would be OK keeping the lines between the nozzles at a minimum. Keep in mind the upped nozzle is still a vent and the lower nozzle is still a drain. But this should work ok.
Oh. No poking fun at my pictures.
Yes the check valve should be that close to the tee.
Want to reduce the amount of fluid drain and quicken the fill/purge time reduce the size of the line beteen the nozzles.
Keep in mind that fuid like electricity takes the path of least resistance.
Minus the large check valve after the pump this is how my system is. Keep in mind I use a m2 nozzle at the upper and a m5 in the IC so I can get away with the restriction. This is a very light bill type check valve between the two nozzles.
I had set this up with magnetic valves too, but Chester is now picking up the parts and piling them up. Bad Dog!
Thanks Stealth, that's a load of information. I think I need to possibly re-do my intercooler nozzle placement, not sure yet. I will try and see if I can shorten the lines as well between the nozzles. And since the checkvalve connects to the pump, i'm not sure I can move it up to before the distribution block. I tested it last night but just taking the lines off the nozzles and priming the system, and it's getting fluid all the way up.
You aint that far away. I'm about 10min over the RI line on 146. I might have the fittings you need to move your check valve. PM me if you need them. I work evenings this week.
You will find the highest air velosity in the IC is at the outlet tube. There is room between your ECU bracket and the front lower radiator support at 3 O'clock. - looking at it from under the car -
Good luck and let's hope for success.
Quote: Originally Posted by tusamni
Thanks Stealth, that's a load of information. I think I need to possibly re-do my intercooler nozzle placement, not sure yet. I will try and see if I can shorten the lines as well between the nozzles. And since the checkvalve connects to the pump, i'm not sure I can move it up to before the distribution block. I tested it last night but just taking the lines off the nozzles and priming the system, and it's getting fluid all the way up.
If you're not too busy sometime this weekend (I work 9-5, so weekdays probably won't work) I might like to meet you somewhere and have you take a look at it. Then we will know for sure if you will have the fittings and you can critique my install, and probably laugh at it. I think the intercooler nozzle placement could be part of the problem, the rest should be pretty good.
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BTW, I saw the video of your car, it was awesome.
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