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I have a pressure switch to activate it and it based on a drop in pressure, but I am thinking about ditching that and operating the electric valve from an rpm based GPO. I am thinking about just having the valve open above 2500-3000 rpms when there is high oil pressure. This is better than a pressure switch that opens the valve below say 35 psi because at idle the pressure is below this and it will empty the accumulator.
Thoughts?
This is where I have it mounted. I would not feel as comfortable with it here if I did not have fender liners
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And of course, random picture of the day. Looks like someone sprung a small water leak!
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Re: Jim Green's 90q 20vt - accusump
Posted: Mon Apr 09, 2012 3:40 pm
by Quattro v1.0
Wow, thats close. I guess it makes sense if you have the room. Mine is in the back mounted to the rear strut tie bar.
Re: Jim Green's 90q 20vt - accusump
Posted: Mon Apr 09, 2012 5:20 pm
by RSCoupe
Get rid of the electric valve and go with a manual one. The electric valve is slow to react, and also slow flowing.
Another problem with it is that it will always try to refill the reservoir, even when "off". So if your oil level is low, it will still try to fill the reservoir, thus starving the motor, creating a vicious cycle.
Re: Jim Green's 90q 20vt - accusump
Posted: Mon Apr 09, 2012 8:59 pm
by audifreakjim
Mark, I was playing with the valve, and it flows enough to very quickly empty the accumulator. Within a few seconds! I can see how the electric valve will allow recharge when you think it is closed, but this is not any different than a ball valve that is open all of the time. This is why I want to hook it to a gpo, so it can't open at low rpm when at idle. With a ball valve you would have to always be open and closing it.
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 4:39 am
by turboskipper
Jim, you have oil pressure issues?
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 7:11 am
by audifreakjim
I get lifter tick out of turns that I have to drop into second gear, and I know 1st and second send all of the oil to the back of the pan..
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 7:21 am
by Audilard
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 1:19 pm
by Audi_CQ
audifreakjim wrote:I have a pressure switch to activate it and it based on a drop in pressure, but I am thinking about ditching that and operating the electric valve from an rpm based GPO. I am thinking about just having the valve open above 2500-3000 rpms when there is high oil pressure. This is better than a pressure switch that opens the valve below say 35 psi because at idle the pressure is below this and it will empty the accumulator.
Thoughts?
When running it on the track use a switch and have the valve open all the time. Gives the most stable oil pressure. BTDT :-)
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 1:38 pm
by audifreakjim
OK, so here is the real question. Has anyone running an accusump noticed a drastic decrease in lifter tick?
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 2:25 pm
by Wheeljack
You cannot escape your destiny.
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 2:29 pm
by a_CQ
Jimmy, how old are your lifters, or what brand do you have in there? How high do you rev the motor?
Only time I've had lifter tick was when I was low on oil (not full, more towards the bottom of min mark) during Auto-X. Never had an issue on track, but I only revved my 7A to about 7,200, although it would often sit there a lot. Can you monitor your oil pressure better? If your pressure is good you may be chasing something else here.
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 2:40 pm
by HeartlessNomad12
same, my 7A gets a bad tick only when i start getting low. If I am dead center of the oil marks, then hard corners get the low oil light to come on, if i keep it near the top mark then no issues at all
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 2:45 pm
by 123quattro
I would run the accusump open all the time with a manual valve. Open it right before you start the engine. Close it right before you turn it off. I've never seen one run different than that.
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 3:53 pm
by Hank
My pulls .82g at 70mph roll ons in 3rd as indicated my my new aim dash, which also monitors oil pressure. Logged together, the 1.4G I get in 1st, the 1.15g in second, I see a drop in oil pressure when reving past 6500. Not below 30 psi, but i would rqther have a solid 65psi everywhere. If I am rippiny 1-2-3-4, oil pressure gets spooky low. Lifters complain a lot
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 3:59 pm
by audifreakjim
Pretty much what Hank said. It's oil pressure. I'll be testing it this weekend
Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 4:23 pm
by Mcstiff
ShavedQuattro wrote:My pulls .82g at 70mph roll ons in 3rd as indicated my my new aim dash, which also monitors oil pressure. Logged together, the 1.4G I get in 1st, the 1.15g in second, I see a drop in oil pressure when reving past 6500. Not below 30 psi, but i would rqther have a solid 65psi everywhere. If I am rippiny 1-2-3-4, oil pressure gets spooky low. Lifters complain a lot
This type of talk does not help with my want of an aim dash. I'm planning on trying the VEMS Android app for now.
Re: Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 5:34 pm
by Hank
The AIM dash is awesome. It is such a powerful little unit. It is so easy to use and constantly datalogs the last 250 key starts!!! I can't wait to get the GPS module so I can see my lines overlapped with my data from my ECU!! I paid around a grand for my pista used, but it was well worth it as I could not have put gauges and sensors together for similar money.
Jim Green's 90q 20vt - accusump
Posted: Tue Apr 10, 2012 6:42 pm
by Mcstiff
ShavedQuattro wrote:The AIM dash is awesome. It is such a powerful little unit. It is so easy to use and constantly datalogs the last 250 key starts!!! I can't wait to get the GPS module so I can see my lines overlapped with my data from my ECU!! I paid around a grand for my pista used, but it was well worth it as I could not have put gauges and sensors together for similar money.
:lalalalalala: Too many things come in >$1k increments :banghead: Android gauges for now...
Re: Jim Green's 90q 20vt - accusump
Posted: Wed Apr 11, 2012 10:57 am
by a_CQ
My pulls .82g at 70mph roll ons in 3rd as indicated my my new aim dash, which also monitors oil pressure. Logged together, the 1.4G I get in 1st, the 1.15g in second, I see a drop in oil pressure when reving past 6500.
How are you logging this? Did you add a longitudinal G sensor, because according to AiM Pista only has lateral built in sensor.
What sort of pressure drop are you seeing?
Re: Jim Green's 90q 20vt - accusump
Posted: Wed Apr 11, 2012 1:55 pm
by Hank
I still have the aux box from my old innovate box. It is easy to bring in as an input. That is also how I am logging individualegt on multiple channels too. I just didn't have the cash for the aim accessories at the time.
Re: Jim Green's 90q 20vt - accusump
Posted: Wed Apr 11, 2012 3:42 pm
by Hank
Nate, that is a cleaner way of doing it. I'll have to play with the math.
I see 30 psi in consecutive lower gears, or about 45 psi if I get on it for just one gear. I'll likely accusimp or dry sump soon. I have the dry sump, but that is the easy part.
Re: Jim Green's 90q 20vt - accusump
Posted: Wed Apr 11, 2012 3:59 pm
by Quattro v1.0
All of this helps me come to the realization that no matter what I do to my car, it will just be insignificant and trivial.
Re: Jim Green's 90q 20vt - accusump
Posted: Wed Apr 11, 2012 5:38 pm
by quattro87
Maybe so Sean, but we get extra points for actually running I think!!
Jim Green's 90q 20vt - accusump
Posted: Wed Apr 11, 2012 7:08 pm
by Mcstiff
quattro87 wrote:Maybe so Sean, but we get extra points for actually running I think!!
Did you swap plates?
