Please help! I have just finished my turbo install. I used a dash 4 line T'd at 90 degrees feeding off the oil pressure sensor. I left the oil pressure sensor in line with the feed. I have a restrictor just before the turbo. It was designed by ATP to prevent excessive oil pressure from damaging the seals in the turbo. I also thought it would help keep oil pressure high at the feed point.

What can I do to up the oil pressure enough for VTEC to function? Would a dash 3 feed line solve the problem? I'll probably go to find another restrictor somewhere today. I'm hoping to have this solved soon! Any suggestions would be welcome. Thanks!

Tim

 

Figured it out.

I tapped into the VTEC solenoid oil feed- not the pressure sensor. I may need a new VTEC solenoid (I epoxied mine into the T after rethreading the T to M10x1.25), but I'm going to try to just plug the part of the T that I had the oil feed in it. I'm having a heck of a time finding a BSP to NPT tee... Hoping to have it running again tomorrow by noon. Right now I'm trying to get the bolts on the wastegate to hold.

Quick question- Does the VTEC solenoid have to be all the way in, or if it's still at the end of the T am I going to be okay? Thanks.

Tim

 

It sounds like you tapped the VTEC pressure switch port on the VTEC solenoid. As far as I know, the VTEC pressure switch port doesn't recieve oil pressure at all times. The only oil feed port that I'm familiar with is the Stock oil pressure sending unit port below the VTEC solenoid.

 

How do you know you don't have any vtec? With a well tuned turbo, there will be no sudden transition when you hit vtec, just smooth, continuous power.

 

U can tell cause the car spins when your in first gear as soon as u hit VTEC....

 

I did tap the VTEC solenoid feed. I figured it out just after my shakedown runs. I have spent the last 2 days fixing the oil feed problem and should have a new VTEC switch in tomorrow or Wednesday. After that, I'll go back to tuning. The turbo doesn't seem to have any play and still spins freely. I don't think I damaged it at all, but I'll find out when I finally get everything back together. During my initial runs it spooled VERY quickly and made huge power below VTEC. I was running conservative timing and 11:1 a/f ratios.

Tim

 

Where can I find out if that is true or not.
I have had my turbo feed line there since day one on my turbo.
I may have to switch it out and find a different source.

 

Manual say it has 7psi below 5000 rpm and 50 psi above 5000 rpm.
I read on honda-tech that it robs the head of oil and ruins the cams.
Dont know, but DSM come stock with the feed line in the same spot.

 

The VTEC oil pressure switch is used to verify VTEC operation. when the VTEC soleniod is on, the switch is off. I've got similar specs you have listed, 7psi below 5k, 57 above 5K. 7psi of oil pressure is not block oil pressure. I've never had my oil pressure gauge below 25psi. Anywhere in VTEC the pressure has been 90psi.

weather or not it's a suitable feed location for your turbo is up to you. I wouldn't imagine the turbo likes the huge pressure change when the VTEC is engauged.

 

Well thats what I am trying to figure out. I think it should be fine for the turbo since DSM have the same source and around the same psi, but I read its bad for the cams when in V-TEC (internet mumbo-jumbo, Ha Ha).
I dont drive my car right now so I will do some more research.