bmarchuk Posted February 3, 2009 Share Posted February 3, 2009 Ive heard the differences, but which is better? I hear the hydraulic is better for reliability and wont need to be tuned as often? true? is this a good head to put on my l28 block (the hydraulic version) if im looking to go for the 250-350 hp range, nothing outrageous like 400+ I also read that its not good for 6k+ rpms, but I barely break 5k normally with my standard l28, am I really going to be doing much over 6 with a turbo head? Thanks for the help in advance. Bryan Quote Link to comment Share on other sites More sharing options...
bmarchuk Posted February 3, 2009 Author Share Posted February 3, 2009 also, i am only asking because i may be able to get a p90a with hydraulics for very cheap, but i have a standard l28 from a 80 280zx that i am thinking of converting, would it be worth it to swap out the lifters from that engine? and if i do so, would i have to use the cam from the non turbo head? would that be optimal? Quote Link to comment Share on other sites More sharing options...
woldson Posted February 3, 2009 Share Posted February 3, 2009 The hydraulic head's cam is designed for those lifters. If you go solid, make sure you use the cam rocker arms and lash pads, in order they were in on the other head. You can always give the hydralics a shot, if you don't like it, go solid later. Search timeserts. Quote Link to comment Share on other sites More sharing options...
B-rad Posted February 16, 2009 Share Posted February 16, 2009 I have a P90a head and want to change over to solid lifters. can I install the lifters out of a 1975 280z L28e? Quote Link to comment Share on other sites More sharing options...
Challenger Posted February 16, 2009 Share Posted February 16, 2009 Yes, but you have to use all the related components mentioned earlier. Quote Link to comment Share on other sites More sharing options...
Lt. Cdr. Tom Dodge Posted February 16, 2009 Share Posted February 16, 2009 I have a P90a head and want to change over to solid lifters. can I install the lifters out of a 1975 280z L28e? As I understand, you can use any Lseries mechanical adjusters, but you have to have to us the Hyd to Mech conversion kit. Some one with hands on experience would know better. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted February 16, 2009 Share Posted February 16, 2009 If you're only looking for ~350 HP, no reason to get away from the hydro cam - heck - ther're good for 400+ (depending upon boost) Quote Link to comment Share on other sites More sharing options...
woldson Posted February 17, 2009 Share Posted February 17, 2009 If I remember correctly, at higher rpms the lifters can have problems responding quick enough. Quote Link to comment Share on other sites More sharing options...
Netrix Posted February 18, 2009 Share Posted February 18, 2009 If I remember correctly, at higher rpms the lifters can have problems responding quick enough. Hyd or Mech? Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted February 18, 2009 Share Posted February 18, 2009 Hydraulic "rocker posts" can bounce at high loads, reducing valve lift. In good condition, they are fine for most applications. They are really nice and quiet with low maintenance when they are in good shape. Quote Link to comment Share on other sites More sharing options...
B-rad Posted February 19, 2009 Share Posted February 19, 2009 I bought my motor from a wrecking yard. Who knows how many mile are on it. The compression is perfect but i really don't know how good the lifters are. I read a post a while back and a guy popped the little cap off his lifter and cleaned them. I guess he never had any problem afterward. I'm just a little scared to to di because it seems like you cant get them anymore. is this true? I cant find them... Quote Link to comment Share on other sites More sharing options...
naviathan Posted February 19, 2009 Share Posted February 19, 2009 Run an engine flush through it if you're concerned about the hydrolic lifters. It should clean things up fairly well without having to pull a bolt. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted February 19, 2009 Share Posted February 19, 2009 I opened mine and cleaned them but if they are worn, this won't help. If they tick very loudly at start up and occasionaly at idle, they are worn. You can usually just sort of hear which one is ticking and find a decent used one to drop in. I have a bunch of them which are mostly still good. You will know right away when you hear it. It's either good, or ticking really loud. Quote Link to comment Share on other sites More sharing options...
B-rad Posted February 23, 2009 Share Posted February 23, 2009 Thanks for the info. I plan on buying everything to rebuild the head. ( valves, guides, seats,spring set, rocker arm guides, etc..) it really sucks you can't find new lifters. I should just change them with mech. well my plan is to rebuild the head. as for the block i was going to change the piston rings, main and rod bearings, and a good head gasket. Then install a new timing set, water pump, and oil pump. I think with these thing done a should have a good reliable motor. I really only want around 250 horses. what do you guys have done to yours. oh, how hard is the wiring for swapping the l28et into a 1975 280z. can i just use the stock wiring but change the computer? What about megasquirt? Is that hard to use? I can do almost anything mechanical but wiring is my downfall. thanks again for all the info.... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.