I have heard from Raver. Vernon is looking at the problem and will be getting back to me. I hope it is soon!

Great-again, keep us posted.

Will

Looking forward to hearing what they have to say.

Here is what I am thinking about this head. I believe Raver had set this head up for a high lift cam. When I purchased the head, they took the big cam and lash pads out and intalled a milder cam and lash pads. I do not feel that they changed the valve springs. This engine is bleeding down instantly when you start turning it over. The only thing this can be, IMHO, is too severe valve spring pressure. What do you guys think?

If that was true then it wouldn't have worked with the big cam either, or so you would think...

This head does not work. We changed the valve springs from 270# down to 210#. It made it worse. The lifters pump up faster with less spring pressure. We are now going with solid lifters. I will change the springs back and adapt the hydraulic bosses to accept the solid adjusters. I have worked 14 months on the car so a couple more days will not make a difference. Too bad Raver Motorsports did not have this engine in their shop. It would not have worked with any solid cam. WEB Cams told me it would not work. I guess I should have listened to them.

"RaVer Motorsports CA 559-733-4711 Vernon and Patti have extensive knowledge of Nissans and their capabilities. Turbos, engine swaps, exceptional headwork, lightened flywheels, bored throttle-bodies, stealthy NO2 setups (custom plate systems), etc., etc.! Basically, nothing is off-limits, and all work is extremely detail-oriented and impeccably well crafted. Honesty and customer service are the backbone of the business. The most honest folks in the import business."

Guess their knowledge isn't as extensive as they thought. Bummer for you and any other custmers of theirs. Hope you get it sorted out.

All I know is they are going out of business and have cancelled their phone. I sent them an email. They notified me that they got my message but never responded to my concerns. No answers about this head and my problems. Maybe they will contact me on Monday. I will no longer need their help. I am killing the hydraulic head idea. It sounded like a great head but it was not to be.

This thread isn't even a week old, you heard from them yesterday, and you are ready to chuck the whole situation? I understand the frustration enthusiasm brings to a problem, but that still seems mighty quick to chuck the money anad time you have in this head-not to mention its potential.

I would give them more time, and explore the other possabilities in the meantime. They did, after all, respond to your contact only yesterday...

Will

I see your point. I am under the gun a bit on the Z. I took it to a shop for the exhaust system to be installed. Once the 2 1/2" system was in place, I fired the car up. I was going to drive it back to my shop about 8 miles away. I cannot get the car to run good enough to drive it back. I need a trailer and tow car, again, in order to get the car back to my shop. (It is still at ZTherapy's shop) I first ordered a new oil pump. That took a week. When I fired the car up it did the same thing. I talked with Bobby Haney about the engine and he recommended checking valve spring pressure. Sure enough it had stiff springs. I ordered new springs and that took a week. I put the 210# springs back in it and it did not work, either. Now I am waiting for Raver to answer. I first called them 2 weeks ago and they never responded. I called again and got the new message about using their email address. I sent a message. Two days later I sent a second message. Patti responded but said Vernon would get back to me. That was on Thursday. I guess I could keep trying all of these things that people "recommend" but it is costing me money and time. If you say I am in a hurry, you are correct. I have been fighting this situation for over 3 weeks. I have found only one person who ran a solid cam in a P90A head and his idea did not work out. If I do not hear from Raver, where do I go? Ron at Nissan? I need definitive information on this head.

You would probably be cheepest in time and money to get, clean, and use a used P90 or p90A-line up the timing chain, bolt it down, bolt the other parts to it, and drive off-keep the other head for vernon to straighten out-so much has been done to it, I wouldn't want to be in a position to put more parts on it with modified plumbing through it.

Will

I am looking for a P90A complete head. If I can find one, I will install the hydraulic cam and see if this head works. If the lifters still pump up, there is a major problem with the installation. I can take the lifters out and modify them into solid adjusters and install them with solid WEB cam. I win i either case.