Anybody have some instructions on how to prepare a JDM V7 AVCS head for non-AVCS use??? ie: what needs to be sealed, taken off, tapped, ect....
Thanks

... :confused:

anybody?

http://forums.nasioc.com/forums/showthread.php?t=961752

http://forums.nasioc.com/forums/showthread.php?t=961752

Close, but most of the talk is about preparing the head to be used as an avcs head on a non avcs block. I want to know the reverse. I was under the impression there was a few things that had to be done to NOT use the avcs system.

That is exactly what that topic is about. You can't use AVCS on a non-AVCS block. The AVCS capable blocks have holes tapped in to connect oil lines for the AVCS system. If your block doesn't have those holes, you must still connect an oil line to the AVCS system because that system also lubricates the cams. The plumbing for the AVCS must remain in tact, but it wont be used unless your ECU supports it. If your ECU doesn't support it, it wont be active.

One idea I came up with would be to get one of those sandwich adapters that is used for connecting an oil cooler to your engine. It goes between the oil filter and the block and has two connections for oil lines...one out and one in. You would probably want to use a higher pressure oil pump for this, but I can't confirm that. Anyway, the outgoing oil line would have a T in it and the two lines coming off the T would go to each AVCS oil connection on the heads. Thus keeping the cams lubricated with oil during operation. Again, I don't know if this can be done without some extra oil pressure. On the EJ22T block, the oil pump operates a higher pressure than other oil pumps, which might work.

Again, this is merely an idea, I'm not a master-technician, nor am I an expert on this. It was simply an idea I came up with. Don't blame me if you try it.

That is exactly what that topic is about. You can't use AVCS on a non-AVCS block. The AVCS capable blocks have holes tapped in to connect oil lines for the AVCS system. If your block doesn't have those holes, you must still connect an oil line to the AVCS system because that system also lubricates the cams. The plumbing for the AVCS must remain in tact, but it wont be used unless your ECU supports it. If your ECU doesn't support it, it wont be active.

One idea I came up with would be to get one of those sandwich adapters that is used for connecting an oil cooler to your engine. It goes between the oil filter and the block and has two connections for oil lines...one out and one in. You would probably want to use a higher pressure oil pump for this, but I can't confirm that. Anyway, the outgoing oil line would have a T in it and the two lines coming off the T would go to each AVCS oil connection on the heads. Thus keeping the cams lubricated with oil during operation. Again, I don't know if this can be done without some extra oil pressure. On the EJ22T block, the oil pump operates a higher pressure than other oil pumps, which might work.

Again, this is merely an idea, I'm not a master-technician, nor am I an expert on this. It was simply an idea I came up with. Don't blame me if you try it.

My V7 heads will be going on a USDM STI 2.5 shortblock so the oiling factor should be fine, but My ecu and wire harness will not support the AVCS so I was under the impression I had to seal off some areas on the heads themselves(maybe were a sensor went?) and tap and seal something to do with the cam or cam gear for some reason.

Another question would be if my stock 2002 cam gears will work on these jdm V7 heads.
Thanks

If you use the AVCS heads with an ECU that doesn't control AVCS, then you will just not have AVCS. Everything should bolt together normally. Do you have the AVCS cam gears still? If so, use those. Again, the AVCS only works if you have an ECU that controls AVCS, otherwise if your ECU does not control AVCS the heads should still work just fine, but you wont have the AVCS functionality. If the block supports AVCS, then you will route the metal oil lines as you normally would for the heads. You will NOT plug anything up. The only thing that needs to happen for this setup to work on the WRX is the cam gear sensor needs to be mounted differently, and this is detailed in the link to Element Tuning's write up. Since they are using the same setup as you...AVCS heads + 2.5L Shortblock. USDM STi shortblock = Forester XT shortblock = Forester STi shortblock = Legacy 2.5GT shortblock.

Gotcha. I guess I was just told some wrong info. No, I dont have the JDM V7 cam gears but will my Stock 2002 wrx one work just as fine???

If you use the WRX cam gears, you might have to plug some holes since the oil is what operates the AVCS in the AVCS CAM gears. I'm not sure how that would work.

If you use the WRX cam gears, you might have to plug some holes since the oil is what operates the AVCS in the AVCS CAM gears. I'm not sure how that would work.

for some reason this doesnt make sence to me... What do the cam gears have to with oil???? From the looks of it, my drivers side intake cam has the same pick-up points as the the ones in Phil's original post, so I would imagine they would work just fine.

Also in Phil's original post he had mentioned the different cam sensor mounts.. On his V8 sti heads he has the cam sensors inside of the actuall head and states that even though it has those cam sensors placed there, the heads themselves will accept a V7 wrx cam sensor monted in the original V7 WRX location with some modification.

I had noticed my JDM V7 heads have the cam sensors mounted in the heads and are already prepared for my 02' WRX cam sensor without any modification.... So it seems these heads are ready to go no matter which cam sensors you decide to use. Thought it might be some interesting info to share.

AVCS is driven by oil. Oil is pressurized into the CAM gears on the AVCS heads which causes the cam gears to advance or retard timing. THe oil pressure is what drives the AVCS. If you look at hte AVCS heads, the oil is fed into the heads from teh 'top' of the heaeds into a hole and this is then forced into the AVCCS cam gears which causes them to advace timging. I apologize I shoud talk later when I mnot so dronk from the St patricyk s day. LOL!11

Bump. Still waiting on a clear answer wether or not my WRX cam gears will work on these heads.......

Not to get off the subject, but why don't you want the AVCS? If you're going to invest in v7 jdm heads and a USDM 2.5 block, you should use it!!! Ask Phil @ Element about the cool tuning of AVCS. Most people engine building are using pretty good size turbos. He's been able to get larger turbos to spool as much as 500rpm faster with AVCS tuning.

The question isn't how to install without avcs, the question should be how to enable the avcs! If you have a standard wrx ecu w/ em, just sell the combo and get a sti ecu w/ em, or just get a Hydra. A Hydra WRX stand alone will control AVCS.

Not to get off the subject, but why don't you want the AVCS? If you're going to invest in v7 jdm heads and a USDM 2.5 block, you should use it!!! Ask Phil @ Element about the cool tuning of AVCS. Most people engine building are using pretty good size turbos. He's been able to get larger turbos to spool as much as 500rpm faster with AVCS tuning.

The question isn't how to install without avcs, the question should be how to enable the avcs! If you have a standard wrx ecu w/ em, just sell the combo and get a sti ecu w/ em, or just get a Hydra. A Hydra WRX stand alone will control AVCS.

While all this is true and I want to be able to use the AVCS. Its just not realistic for me right now. I would also have to source a wire harness and some other parts because the avcs connectors on my V7 heads are broke. I would rather look at getting some better NON-AVCS cams.
So does anybody know if my WRX cam gears will work on the JDM V7 STI heads?????